НЕВЫЦВЕТАЮЩИЕ ЦЕМЕНТИРУЮЩИЕ МАТЕРИАЛЫ

Изобретение относится к невыцветающим цементирующим материалам, в частности к гидравлическому вяжущему веществу и пасте, из котрой можно изготовить такие материалы, и к способу получения таких материалов. Невыцветающий цементирующий материал образуют из источников алюмината кальция, силиката кальция, сульфата кальция и реакционноспособного диоксида кремния, причем ингредиенты присутствуют в таких относительных пропорциях, чтобы при гидратации образовывался как моносульфат (C3A.CS.12H), так и гидратированный оксид алюминия (AH3). Описаны также гидравлическое вяжущее вещество и паста, из которой такие материалы можно образовывать, и способ образования таких материалов. Технический результат - слабая выцветаемость материалов, сохранение удовлетворительных физических свойств, особенно хорошей устойчивости к природным погодным условиям. 4 с. и 17 з.п. ф-лы, 1 ил.

СПОСОБ ПОЛУЧЕНИЯ СВЯЗУЮЩИХ ВЕЩЕСТВ

Изобретение относится к способу получения связующих веществ путем сжигания смеси минерального сырья. В способе получения связующих веществ путем сжигания смеси минерального сырья в шахтной печи с газификацией противотоком, слои нефтеносного сланца и/или нефтеносного песка преобразуются путем целенаправленной агломерации в частицы определенного размера и консистентности, и водный компонент регулируют до менее чем 25% и пористость агломератов регулируют до 25% для механической стабилизации агломерата, агломераты имеют плотность в разрыхленном состоянии, по меньшей мере, 1,8 кг/л, и агломераты сжигают при температурах между 800°C и 1500°C при восстановительных условиях на протяжении всего процесса при коэффициенте избытка воздуха лямбда менее 1 в вертикальной шахтной печи с газификацией противотоком в связующие вещества, и свойства связующих веществ регулируют целенаправленным добавлением CaO-содержащих веществ и/или серосодержащие компоненты нефтеносного песка и/или нефтеносного сланца связывают ...

СУЛЬФОАЛЮМИНАТНЫЙ КЛИНКЕР С ВЫСОКИМ СОДЕРЖАНИЕМ БЕЛИТА, СПОСОБ ЕГО ПРОИЗВОДСТВА И ЕГО ПРИМЕНЕНИЕ ДЛЯ ПОЛУЧЕНИЯ ГИДРАВЛИЧЕСКИХ ВЯЖУЩИХ

Настоящее изобретение относится к сульфоалюминатному клинкеру с высоким содержанием белита, способу его производства и его применения для получения гидравлических вяжущих. Сульфоалюминатный клинкер имеет фазовый состав, мас.%: 5-25, предпочтительно 10-20 фазы алюмоферрита кальция, соответствующего общей формуле С2AXF(1-Х), где Х включает значения от 0,2 до 0,8, 15-35, предпочтительно, 20-30 фазы сульфоалюмината кальция - С4А3S, 40-75, предпочтительно, 45-65 белита - C2S, 0,01-10 одной или нескольких неосновных фаз, выбираемых из сульфата кальция, сульфатов щелочных металлов, перовскита, алюмината кальция, геленита, чистого известняка и периклаза и/или стеклообразной фазы, кроме того, он содержит один или несколько дополнительных элементов, выбираемых из серы, магния, натрия, калия, бора, фосфора, цинка, марганца, титана, фтора, хлора, присутствующих в следующих количествах, мас.%: 3-10 серы в виде серного ангидрида, до 5 магния в виде оксид магния, до 5 натрия в виде оксида натрия, до 5 ...

СПОСОБ ПОЛУЧЕНИЯ ВЫСОКОГЛИНОЗЕМИСТОГО ЦЕМЕНТА

Изобретение относится к промышленности строительных материалов и может быть использовано для изготовления огнеупорной бетонной футеровки тепловых агрегатов в различных отраслях. Способ включает приготовление шихты, состоящей из извести, высокоглиноземистого шлака хрома и углеродистого восстановителя, ее плавление в электродуговой печи с довосстановлением хрома в расплаве, выпуск, охлаждение клинкерного расплава, дробление и помол клинкера. С целью нормализации сроков схватывания высокоглиноземистого цемента за счет устранения дефицита кислорода в расплаве и его обезуглероживания, клинкерный расплав при сливе его из печи раздувают на гранулы струей кислорода или осушенного сжатого воздуха, или их смесью под давлением от 5 до 20 атм. Технический результат - нормализация сроков схватывания высокоглиноземистого цемента за счет устранения дефицита кислорода и обезуглероживания клинкерного расплава. 1 табл.

СПОСОБ ОБРАБОТКИ ГЛИНОЗЕМИСТОГО ЦЕМЕНТА

... 1. Способ обработки глиноземистого цемента, предназначенного для получения строительных растворов путем затворения водой, крупностью частиц менее 0,08 мм, отличающийся тем, что обработку осуществляют путем окислительного обжига глиноземистого цемента при температуре 850-950°.2. Способ по п.1, отличающийся тем, что окислительный обжиг проводят во вращающейся трубчатой печи с внешним обогревом.3. Способ по п.1, отличающийся тем, что окислительный обжиг проводят во вращающейся трубчатой печи с внутренним обогревом.

РАЗМЕРНОСТАБИЛЬНЫЕ ГЕОПОЛИМЕРНЫЕ КОМПОЗИЦИИ И СПОСОБ

... 1. Геополимерная алюмосиликатная композиция, содержащая продукт реакции:воды;химического активатора, выбранного из группы, состоящей из соли щелочного металла, основания щелочного металла и их смесей; ицементирующего реактивного материала, причем цементирующий реактивный материал содержит:термоактивируемый алюмосиликатный минерал;кальцийалюминатный цемент; исульфат кальция, выбранный из группы, состоящей из дигидрата сульфата кальция, гемигидрата сульфата кальция, безводного сульфата кальция и их смесей,причем массовое отношение химического активатора к цементирующему реактивному материалу составляет от приблизительно 1 до приблизительно 6:100; ипри этом цементирующий материал содержит:от приблизительно 35 до приблизительно 96% по массе термоактивируемого алюмосиликатного минерала,от приблизительно 2 до приблизительно 45% по массе кальцийалюминатного цемента,от приблизительно 1 до приблизительно 45% по массе сульфата кальция.2. Композиция по п. 1,где массовое отношение химического активатора ...

Тампонажный раствор

Изобретение относится к нефтяной и газовой пром-ти и предназначено для крепления нефтяных и газовых скважин, расположенных на месторождениях с проявлением сероводорода. Цель изобретения - повьппение устойчивости цементного камня к сероводородной агрессии . Раствор содержит в качестве вяжущего отход рафинирования стали при следующем соотношении компонентов , мас.%: отход рафинирования стали 67-69, вода 31-33. Отход содержит 60- 90% высокоактивных алюминатов кальция, в том числе 40-50% алюмината, 20-30% однокальциевого алюмината при некотором кол-ве двухкальциевого силиката. При отвердении шлака образуются гидроалюминаты кальция, гиббсит, низкокремнеземистый гидрогранат кальция. Такой состав продуктов твердения делает цементный камень на основе отхода стали стойким к воздействию сероводорода . Присутствие в отходе инертных минералов удлиняет сроки схватывания , что позволяет закачивать раствор в заколонное пространство скважины без применения замедлителей схва- тьшания. При приготовлении ...

Способ получения высокоглиноземистого цемента

Изобретение относится к промышленности строительных материалов и может быть использовано при изготовлении высокоглиноземистого и ряда других огнеупорных цементов. Целью изобретения является улучшение качества цемента за счет снижения остаточного содержания углерода в клинкере. Шлак металлического хрома смешивают в смесителе с известью и 5-8% кокса. Приготовленную шихту равномерно подают в электродуговую печь и проплавляют при 1930-2020°С в течение 70-130 мин. При этом в зависимости от содержания CAO в расплаве температуру T и время плавки Τ задают при следующем их соотношении : /CAO/-2 ≤ T/Τ ≤ /CAO/+2. Затем клинкерный расплав сливают в изложницу. Охлажденный клинкер дробят и размалывают до уд. поверхности не менее 400 м2/кг. Прочность цемента составляет 60-70 МПа. 1 табл.

Spinellhaltiger, zementgebundener Feststoff

Herstellung von Zement-Klinkerphasen mit Hilfe von Siliciden, intermetallischen Verbindungen oder Legierung als Vorstufe

Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von Zementklinkern mit Hilfe von Siliciden, intermetallischen Verbindungen oder Legierungen als Vorstufe.

Non-efflorescing cementitious bodies

Process for the manufacture of calcium aluminates

In the production of an impure calcium aluminate by heating a lime-yielding ore with an aluminate or silica-aluminate material such as bauxite, clay, kaolin, shale and coal ashes, the ingredients are proportioned to provide 1-3 mols. CaO per mol. Al2O3. 0-1 mol. CaO per mol. SiO2, 0-2 mols. CaO per mol. TiO2 and 0 mols. CaO per mol. Fe2O3, and the mixture heated under such conditions that lime-iron oxide combinations are not formed, the temperature being maintained below that at which clinkering occurs. Within the limits, the lime content increases with increase of silica content, and of reaction temperature and time. The reaction temperature may vary from below 1000 DEG C. up to 1350 DEG C., depending on the composition of the reaction mass. The heating may take place with a reducing agent present or in a reducing atmosphere, especially in the higher temperature range. The products may be used as calcareous cements either as such or after separation of the iron, or for the extraction of ...

Improvements in the process for the manufacture of aluminous cement in rotary furnaces

... 211,497. DÚcolland, R. Feb. 14, 1923, [Convention date]. Drawings to Specification. Rotary furnaces.-Aluminous cements are made in ordinary rotary kilns by (a) lengthening the zone, and (b) preventing the formation of a coating due to the fusing of the fuel ashes. The lengthening of the heating zone is accomplished by employing as a fuel a coal such as lignite which contains a large proportion of volatile neutral products, or by diluting the roasting atmosphere with water-vapour or other neutral gas, e.g. waste furnace gases delivered from the foot of the chimney to the air inlet. The prevention of the formation of a coating of fused ashes is effected by mixing with the fuel a sufficient proportion of limestone to combine with the silica, iron, &c., and render the ash refractory, or by removing the refractory lining of the kiln at the point of formation of the fused ash, and cooling the plating by external means.

CEMENT COMPOSITIONS

A method of constructing a floor or ceiling slab

Demolition-facilitating substance

A demolition-facilitating substance (for concrete, rocks or other similar structures) comprises a clinker containing 1.0 to 40% by weight of a calcium-alumino-ferrite solid solution and 60.0 to 99.0% by weight of both free lime and free magnesia, and optionally, a reaction moderator consisting of least one member selected from gypsum, sugars, polyhydric alcohols, borate, organic acids and organic acid salts.

Process of making cement and iron

... 237,779. Eckel, E. C. Nov. 17, 1924. Extracting.-A mixture of limestone, with aluminous iron ore, or with iron ore and an aluminous material such as bauxite, is fused in a high furnace resembling an iron blast furnace, and after sufficient time has elapsed for separation of the reduced iron and the slag, these are separately and intermittently withdrawn and the slag ground up for use as alumina cement. The charge should contain 25-55 per cent of lime (including magnesia), 25-50 per cent of alumina, not more than 10 per cent of silica, and not less than 10 per cent of iron oxide. The ratio of height to diameter of the furnace should be between 5 and 8.

An improved process for producing wool-like or transparent effects on cotton fabrics

Parchment-like or woollike or transparent effects &c. are obtained on bleached or mercerized cotton fabrics by treatment for a brief period, for example 10 to 40 seconds, with a nitrifying-acid comprising equal parts by volume of sulphuric acids of 55 DEG B<\>ae. to 58 DEG B<\>ae. and nitric acid of from 40 DEG B<\>ae. to 41 DEG B<\>ae., the nitrifying-acid being cooled to 0 DEG C. or below. The fabrics are then washed and may be treated with a solution of caustic soda of from 28 DEG B<\>ae. to 32 DEG B<\>ae. after which they are tentered.ALSO:Parchment-like or wool-like or transparent effects &c. are obtained on bleached or mercerized cotton fabrics by treatment for a brief period, for example 10 to 40 seconds, with a nitrating acid comprising equal parts by volume of sulphuric acid of 55 DEG Be. to 58 DEG Be. and nitric acid of from 40 DEG Be. to 41 DEG Be., the nitrating acid being cooled to 0 DEG C. or below. The fabrics are then washed and may be treated with a solution of caustic ...

CALCIUM ALUMINATE CEMENT

... 1479260 Refractory cement KAISER ALUMINUM & CHEMICAL CORP 31 Oct 1975 [18 Nov 1974] 45477/75 Headings ClH and ClJ A refractory calcium aluminate cement comprises a mixture of (a) 40-60 wt. per cent ground cement clinker, at least 80 wt. per cent of which is in the CA phase, and (b) 60-40 wt. per cent of finely divided calcined alumina having a specific surface of 1-10 m.2/g., an average pore size of 0.05 to 0À5 microns, a specific pore volume of 0À1 to 0À5 c.c./g. and a brain coral morphology, at least 80 wt. per cent of the cement passing a 325 Tyler mesh screen. The cement may be made by admixing the cement clinker and calcined alumina and grinding the clinker and alumina before or after admixing. Grinding may be in the presence of a grinding aid, e.g. triethanolamine or naphthenic acid. Sodium citrate may control the rate of setting of the cement. Refractory aggregates may include calcined alumina, tabular alumina and porous aggregate.

REFRACTORY BINDER PREPARATION

Impregnated cloth

Impregnated cloth

Impregnated cloth.

Impregnated cloth

Impregnated cloth.

Impregnated cloth

Impregnated cloth.

Fireproof Tonerdezement and procedure for the production of the same

VERFAHREN ZUR HERSTELLUNG EINER MODIFIZIERTEN PORTLANDZEMENTMISCHUNG

A method for producing a hydraulic binder

Bei dem Verfahren zur Herstellung eines hydraulischen Bindemittels aus einem CaO-haltigen Stoff und einem Al2O3- hältigen Nebenprodukt aus der Sekundäraluminium-Herstellung wird erfindungsgemäß das Al2O3-hältige Nebenprodukt ohne vorheriges Waschen zusammen mit dem CaO-haltigen Stoff bei 1500°C bis 2000°C, vorzugsweise bei zumindest 1700°C, gebrannt und geschmolzen, und die in den Abgasen enthaltenen flüchtigen Wertstoffe werden durch Abkühlung rückgewonnen. Es ist günstig, wenn das Brennen und Schmelzen unter reduzierender Atmosphäre erfolgt, denn dadurch bilden sich flüchtige Schwermetallhalogenide, sodass das gebrannte Produkt arm an Schwermetallen ist. Die Eigenschaften des gebrannten oder geschmolzenen Produktes können durch rasche Abkühlung beeinflusst werden, z.B. mit dem rotating cup- Verfahren oder im Wasserbad.

A method for producing a hydraulic binder

Bei dem Verfahren zur Herstellung eines hydraulischen Bindemittels aus einem CaO-haltigen Stoff und einem Al2O3- hältigen Nebenprodukt aus der Sekundäraluminium-Herstellung wird erfindungsgemäß das Al2O3-hältige Nebenprodukt ohne vorheriges Waschen zusammen mit dem CaO-haltigen Stoff bei 1500°C bis 2000°C, vorzugsweise bei zumindest 1700°C, gebrannt und geschmolzen, und die in den Abgasen enthaltenen flüchtigen Wertstoffe werden durch Abkühlung rückgewonnen. Es ist günstig, wenn das Brennen und Schmelzen unter reduzierender Atmosphäre erfolgt, denn dadurch bilden sich flüchtige Schwermetallhalogenide, sodass das gebrannte Produkt arm an Schwermetallen ist. Die Eigenschaften des gebrannten oder geschmolzenen Produktes können durch rasche Abkühlung beeinflusst werden, z.B. mit dem rotating cup- Verfahren oder im Wasserbad.

PROCEDURE FOR THE PRODUCTION OF A MODIFIED PORTLAND CEMENT MIXTURE

PROCEDURE FOR THE PRODUCTION OF A MODIFIED PORTLAND CEMENT MIXTURE

MANGANIFEROUS TONERDEZEMENT

SINTERING CALCIUM ALUMINATE RAW MIXES

Use of compounds containing aluminium oxide and silicon oxide for producing a hydrophilic building product

The use of a binder system comprising compounds containing aluminium oxide and silicon oxide for producing a hydrophilic building product, characterized in that the sum of the oxides calculated as AI ...

Freeze-thaw durable geopolymer compositions and methods for making same

A freeze-thaw durable, dimensionally stable, geopolymer composition including: cementitious reactive powder including thermally activated aluminosilicate mineral, aluminate cement preferably selected from at least one of calcium sulfoaluminate cement and calcium aluminate cement, and calcium sulfate selected from at least one of calcium sulfate dihydrate, calcium sulfate hemihydrate, and anhydrous calcium sulfate; alkali metal chemical activator; and a freeze-thaw durability component selected from at least one of air-entraining agent, defoaming agent, and surface active organic polymer; wherein the composition has an air content of about 4% to 20% by volume, more preferably about 4% to 12% by volume, and most preferably about 4% to 8% by volume. The compositions are made from a slurry wherein the water/cementitious reactive powder weight ratio is 0.14 to 0.45:1, preferably 0.16 to 0.35:1, and more preferably 0.18 to 0.25:1. Methods for making the compositions are also disclosed.

LIME AND SILICA-RICH HIGH-ALUMINA CEMENT, AND PROCESS FOR MANUFACTURING SAME

INSULATOR

Use of alumina cement mortar is enabled as a source material of a cement kneaded product cured body for joining hardwares onto an insulator body, whereby an insulator can maintain a high mechanical strength (initial strength, long-term strength) and a high electrical strength for a long period of time, and the curing time in forming the cured body is shortened to reduce the cost of producing the insulator. As a source material of a cement kneaded product cured body for joining hardwires one makes use of an alumina cement mortar obtained by kneading an alumina cement having a specific surface area of at least 3500 cm2/g, a polymer-steric-hindrance type water reducing agent, an aggregate, and water, or an alumina cement mortar obtained by kneading an alumina cement having an amorphous phase on an outer peripheral surface of particles and having a specific surface area of at least 3500 cm2/g, a water reducing agent, an aggregate, and water.

TERNARY BINDER SYSTEM

The present invention relates to a mineral binder system comprising a mineral binder Bi of calcium aluminates, having a ratio C/A of calcium oxide C to aluminium oxide A of 0.7 to 1.1, a mineral binder B2 of calcium aluminates, having a ratio C/A of calcium oxide C to aluminium oxide A of 1.2 to 2.7, and at least one sulphate carrier, to a dry mortar which comprises this mineral binder system, to a wet mortar based on this dry mortar, and to the use of the dry mortar as tile adhesive mortar, levelling compound, waterproofing slurry, grout mortar, screed binder, screed mortar, repair adhesive and/or damp proof membrane.

Procédé de purification de ciments fondus.

Verfahren zur Erreichung einer einwandfreien Zerrieselung von zum Zerrieseln neigenden Kalkaluminatschlacken.

Procédé de préparation d'un ciment à haute teneur en alumine

Verfahren zur Herstellung von marmorierten Kunststeinen und Gussform zur Durchführung dieses Verfahrens

Miscela a pigiatura per forni ad induzione per l'alluminio

Ciment réfractaire alumineux

METHOD OF MANUFACTURING CALCIUM ALUMINATES

- CALCIUM ALUMINATE CEMENT, CHARACTERIZED BY PROLONGED UDOBOUKLADYVAEMOSTYu AND HARDENING, PROMOTIRUEMYM INCREASE OF TEMPERATURE, AND TO ITS CORRESPONDING APPLICATION

Process and device for the manufacture of molten cement

PROCEDE DE FABRICATION D'UNE SCORIE DE DESULFURATION DE L'ACIER

LA PRESENTE INVENTION A POUR OBJET UN PROCEDE DE PREPARATION D'UNE SCORIE DE DESULFURATION DE L'ACIER. CE PROCEDE EST CARACTERISE EN CE QUE L'ON PORTE A HAUTE TEMPERATURE UN MELANGE DE PRODUITS GENERATEURS DE CHAUX ET DE PRODUITS GENERATEURS D'ALUMINE, EN PRESENCE D'OXYGENE, SOUS UNE PRESSION PARTIELLE D'OXYGENE COMPRISE ENTRE 10 ET 5.10 ATMOSPHERES. ELLE SE RAPPORTE A LA DESULFURATION DE L'ACIER SELON UN RENDEMENT AMELIORE.

Treatment of aluminous cement

Mechanical bin

New method of preparation of high-strength cements

LUMINE

La présente invention concerne la pâte crue pour la fabrication du ciment réfractaire à haute teneur en alumine. Selon l'invention, la pâte crue proposée contient un constituant calcaire, un constituant alumineux et du chlorure au moins d'un des métaux suivants : magnésium, calcium, baryum, strontium, sodium, potassium, pris dans un rapport suivant, % en masse : constituant alumineux (calculé en Al2 O3 ) 69 à 73 constituant calcaire (calculé en CaO) 11 à 23 chlorures des métaux sus-indiqués 20 à 4.

Manufactoring process of bauxite cements free from metal impurities and products new while resulting

Process for the simultaneous production of sulfurous and aluminous matters or aluminous cement

REFRACTORY HYDRAULIC BINDER CONTAINING CALCIUM ALUMINATE AND ITS METHOD OF PREPARATION

Method of preparation of calcium aluminate cement

Mode of establishment of the apparatuses intended for the manufacture of molten cement

Simultaneous manufactoring process of not very siliceous cast iron and special slag for extra molten cement refractory and resistant, with very high content of alumina and products thus obtained

CEMENTITIOUS MATERIAL CURABLE HYDRAULIC BINDERS FOR IMPLEMENTATION AT LOW TEMPERATURES

Whiter high-alumina cement prodn - using clinkering at low temp

Process for the conversion of crude aluminosilicates to alumina, sodium products and cement

METHOD OF MAKING CALCIUM ALUMINATES

L'invention concerne un procédé de fabrication d'aluminates de calcium dans un four (1) industriel, selon lequel on introduit, en continu, dans une cuve (15) en matériau réfractaire contenant un bain de fusion (11) chauffé en permanence, des fines particules d'une matière première source d'alumine (Al2O3) et/ou d'aluminium (Al) et d'une matière première source d'oxyde de calcium (CaO) et/ou de calcium (Ca) présentant un diamètre médian d50 inférieur ou égal à 6 000 µm pour faire fondre lesdites fines particules de matière première, et on récupère, en continu, en sortie de cuve une masse d'aluminates de calcium (16) liquide.

IMPREGNATED CLOTH

Method for the manufacture of a sprayed, material material sprayed in itself and manufactured ceramic material from the same

METHOD OF FORMING A MODIFIED PORTLAND CEMENT

COMPOSICAO AUTONIVELADORA DE REBOCO E PROCESSO DE APLICACAO DE REBOCO AUTONIVELADOR

BINDER FOR SELF-COMPACTING SELF-COMPACTING BACKFILL

Liant pour remblai autocompactant et réexcavable Composition de liant hydraulique destinée à être utilisée pour former un remblai autocompactant et réexcavable, ladite composition de liant hydraulique comprenant des cendres volantes, du ciment alumineux, et de la chaux hydratée, ladite composition de liant hydraulique étant destinée à être mélangée à une composition de granulat et à de l'eau pour former ledit remblai autocompactant et réexcavable.

METHOD AND PLANT FOR MAKING ALUMINA CEMENT AND ALUMINA CEMENT

The invention concerns a method for making alumina cement wherein the concentration d3 in alumina Al2O3, -A-, and the concentration d4 in lime CaO, -C-, in the initial mixture are such that d3/d4 ranges between 1.15 and 1.40, and grinding produces a cement with size distribution as represented in a Rosin Rammler diagram has a gradient ranging between 0.75 and 0.90. The invention also concerns a plant for making alumina cement and the resulting alumina cement.

REFRACTORY ALUMINOUS CEMENTS

Calcium aluminate cement

The present invention relates to a white calcium aluminate cement containing at least 90% by weight of monocalcium aluminate, an A/C value in the range of 1.75 to 2.0, a fineness according to Blaine in the range of 3500 to 6000 cm2/g, a slope n in the range of 1.1 to 1.5 and a location parameter x of 8-20 m in an RRSB particle size grid according to DIN 66145 as well as its use in formulations of the construction chemical industry and the refractory industry.

QUICK SETTING PROMOTER

PROBLEM TO BE SOLVED: To obtain a quick setting promoter for cement, capable of suppressing instantaneous setting of the cement just after incorporated therewith, preventing spray unevenness development due to e.g. ripple, quickly setting the cement without concomitant coming off due to its own weight, and promoting the long-term mechanical strength of the cement after set, by including each specified amount of aluminum sulfate and an Na2O-CaO-Al2O3-based composition of specific composition prepared by baking at specific temperature. SOLUTION: This quick setting promoter for cement is obtained by including 1-20 wt.% of an Na2O-CaO-Al2O3-based composition comprising 53-70 wt.% of CaO, 5-20 wt.% of Na2O and 20-40 wt.% of Al2O3 with the content of 8CaO.Na2O.3Al2O3 being ≥50 wt.% and 80-99 wt.% of aluminum sulfate; wherein the above composition is prepared by baking at <1,400°C, pref. 1,200-1,350°C. Another version of the quick setting promoter is obtained by including 1-20 wt.% of the Na2O-CaO-Al2O3 ...

QUICK HARDENING CLINKER COMPOSITION

PURPOSE: To produce a quick hardening clinker composition easy for production by using a rotary kiln, etc., to sinter a melted liq. as a medium, hardly causing remaining of free CaO and capable of quick hardening not only at normal temp. but also at low temp. CONSTITUTION: In a clinker used in the quick hardening cement, 0.1-50wt.% 2CaO.SiO2 based calcium silicate phase and/or 2CaO.Al2O3.SiO2 based calcium aluminosilicate phase are allowed to coexist and 3CaO.SiO2 based calcium silicate phase is not allowed to coexist as a mineral phase in the clinker composition in which 0.1-9wt.% Fe2O3 and 0.1-9wt.% CaF2 are allowed to coexist respectively in the clinker consisting essentially of 12CaO.7Al2O3. In this way, various problems on C12A7 production by an electrofusing method. for example, a sudden rise of production cost are solved. COPYRIGHT: (C)1996,JPO ...

РАЗМЕРНОСТАБИЛЬНЫЕ ГЕОПОЛИМЕРНЫЕ КОМПОЗИЦИИ И СПОСОБ

Изобретение относится к способу изготовления геополимерных цементирующих вяжущих композиций для бетона, элементов сборных конструкций и панелей, строительных растворов, материалов для ремонтных работ. Геополимерные цементирующие композиции согласно вариантам реализации изобретения получают путем смешивания термоактивируемого алюмосиликатного минерала, кальцийалюминатного цемента, сульфата кальция и химического активатора с водой. Изобретение развито в зависимых пунктах формулы изобретения. Технический результат - повышение физико-механических свойств композиций. 4 н. и 11 з.п. ф-лы, 24 ил.,73 табл., 31 пр.

СПОСОБ ПОЛУЧЕНИЯ ПОРОШКООБРАЗНОГО МАТЕРИАЛА, ПОРОШКООБРАЗНЫЙ МАТЕРИАЛ И ИЗГОТОВЛЕННЫЙ ИЗ НЕГО КЕРАМИЧЕСКИЙ МАТЕРИАЛ

Порошкообразный материал, фаза связующего которого состоит преимущественно из системы на основе цемента; этот порошкообразный материал способен после насыщения жидкостью, реагирующей с фазой связующего, гидратироваться до рентгеноконтрастного и химически связанного керамического материала. Согласно данному изобретению указанная фаза связующего состоит преимущественно из CaO·Al2O3 (тр) и/или 3СаО·Al3О3 (тр). Этот материал содержит также один или более типов тяжелых атомов с плотностью свыше 5 г/см3. Изобретение относится также к способу получения порошкообразного материала и химически связанного керамического материала, изготовленного из этого порошкообразного материала, в котором указанная фаза связующего имеет мольное отношение Al2O3·3Н2O (тр) к 3СаO·Al2 O3·6Н2O (тр) максимум 2:1. 3 н. и 25 з.п. ф-лы, 6 табл.

СПОСОБ ПОЛУЧЕНИЯ ВЫСОКОГЛИНОЗЁМИСТОГО ЦЕМЕНТА

Изобретение относится к области производства высокоглиноземистого цемента, в частности к его производству при комплексном использовании продуктов комбинированного безотходного обогащения низкокачественных бокситов. Технический результат изобретения - обеспечение возможности использования боксита с повышенным содержанием вредных примесей, получение высокоглиноземистого цемента с повышенной ранней прочностью и стабильностью при длительных сроках твердения цементного камня. В способе получения высокоглиноземистого цемента, включающем смешение боксита, кокса, металлического лома и известняка, с получением сырьевой смеси, при плавке которой образуются чугун и глиноземистый шлак - клинкер глиноземистого цемента, сырьевая смесь содержит высокоглиноземистый автоклавный концентрат - продукт химического обогащения в автоклаве обожженного, некондиционного по содержанию пирита и кремнезема боксита, глинозем и антрацит марки AM при следующем соотношении компонентов, мас. %: высокоглиноземистый автоклавный ...

СПОСОБ ПОЛУЧЕНИЯ ВЫСОКОГЛИНОЗЕМИСТОГО ЦЕМЕНТА

Изобретение относится к способу получения высокоглиноземистого цемента, в частности к их производству при комплексной переработке алюминийсодержащего сырья. Технический результат - уменьшение энергозатрат за счет снижения температуры и продолжительности спекания шихты. В способе получения высокоглиноземистого цемента, заключающемся в химическом осаждении известкового компонента из суспензии алюминатного раствора и извести, его совместном измельчении с глиноземсодержащим материалом с получением сырьевой смеси, ее обжиге и тонком измельчении продукта обжига - клинкера, известь предварительно гасят и классифицируют с выделением не менее 60 мас.% твердого вещества крупностью менее 50 мкм, в качестве глиноземсодержащего материала используют гидрооксид алюминия, а обжиг сырьевой смеси ведут при температуре 1280-1250°С в течение 0,5-1 часа. 1 табл.

СПОСОБ ПОЛУЧЕНИЯ АКТИВНОГО ГЛИНОЗЕМА η-AL2O3 И ЖАРОСТОЙКОЕ ВЯЖУЩЕЕ НА ЕГО ОСНОВЕ

Изобретение относится к строительным материалам и может быть использовано при изготовлении жаростойких вяжущих веществ. Технический результат - ускорение твердения вяжущего, повышение прочности. В способе получения активного глинозема η-Al2O3 путем обжига гидроокиси алюминия - Al(OH)3 - при температуре частичной дегидратации обжиг ведут при температуре 600-800°С при регламентированной скорости нагрева 200-250°С/час, а обжигаемое вещество охлаждают сразу после достижения максимальной температуры. Жаростойкое вяжущее содержит частично дегидратированную гидроокись алюминия и алюминаты кальция, причем указанная гидроокись алюминия содержит η-Al2O3, а в качестве алюминатов кальция взят высокоглиноземистый цемент в следующих соотношениях, мас.%: указанная частично дегидратированная гидроокись алюминия 40-80; высокоглиноземистый цемент 20-60. Содержание η-Al2O3в указанной гидроокиси алюминия составляет 30-50% по массе. 2 с. и 1 з.п. ф-лы, 3 табл.

Способ производства электроэнергии, ферросилиция и глиноземистого цемента

Изобретение относиться к производству электроэнергии, ферросилиция и глиноземистого цемента в рамках одного энегротехнологического комплекса. Способ включает сжигание в котле тепловой электростанции органической составляющей топлива для получения электрической энергии. Переработку минеральной составляющей топлива в виде шлакового расплава и золы в рол-камерах. Жидкофазное восстановление шлакового расплава и золы проводят в рол-камере плавления с получением ферросилиция и шлакового расплава, подаваемого затем в рол-камеру насыщения, содержащую обожженную известь, где упомянутый расплав насыщают известью, с получением глиноземистого клинкерного расплава. Финишную обработку ферросилиция и глиноземистого клинкера проводят за пределами рол-камер посредством их разливки и охлаждения. Формирование цементной смеси из глиноземистого клинкера и технологических добавок и ее очистка от металлических включений. Пылегазовую фазу из рол-камеры плавления дожигают в котле тепловой электростанции. При этом ...

ПРОПИТАННАЯ ТКАНЬ

... 1. Гибкая ткань, способная затвердевать, становясь жесткой или полужесткой, включающая:первую сторону;вторую сторону, отделенную от первой стороны пространством;самонесущие соединительные волокна, проходящие между первой и второй сторонами, которые удерживают первую и вторую стороны на расстоянии друг от друга, иуплотненный порошковый материал, расположенный в пространстве между первой и второй сторонами, способный к затвердеванию до жесткого или полужесткого монолитного материала при добавлении жидкости,в которой как первая, так и вторая сторона по существу непроницаемы для порошкового материала, но по меньшей мере одна из них проницаема для жидкости, и в которой количество и тип реагента в уплотненном порошковом материале, и объем и уплотнение порошкового материала таковы, что:MV-OV=x·LV,где MV - максимальный объем пространства внутри ткани, на единицу площади ткани; таким образом, MV включает как объем незаполненного пространства в ткани перед добавлением порошкового материала, так и ...

Schnellhärtender Zement, der Klinker auf der Basis von mit Kalk gemischtem Kalziumfluoraluminat enthält

Iron or alumina cement used, e.g., in the building industry contains calcium oxide, aluminum oxide, iron oxide and manganese oxide

Iron or alumina cement contains calcium oxide, aluminum oxide, iron oxide and manganese oxide. The manganese is present in an amount of 5-50 wt.% and the mole ratio of the calcium oxide to the sum of the remaining metal oxides is 00.9-2.5:1. An independent claim is also included for a process for the production of an iron or alumina cement comprising mixing an aluminum-containing material and a manganese-containing material with limestone; calcining the product obtained and crushing the calcined product. The calcined product contains 1-50 wt.% manganese.

Verfahren zur Herstellung hydraulischer Zemente von hohem Tonerdegehalt

Aluminiumoxydhaltige Zemente

Macro defect free cement with improved moisture resistance

A cementitious composition may include polyvinyl alcohol, high alumina cement, water, a metallic coagent, a peroxide crosslinking initiator, and an organic acid retardant. A molded article may be manufactured from the cementitious composition by preparing a hydrogel pre-polymer blend of saponified polyvinyl alcohol acetate (PVAA) with greater than or equal to about 85% saponified PVAA, and water, mixing the hydrogel pre-polymer blend with high alumina cement (HAC) using a high shear mixing process, mixing in a metallic coagent and a peroxide crosslinking initiator, mixing in an organic acid retardant, and hot pressing the mixture at approximately 5 MPa pressure and approximately 90 degrees C for approximately 30 minutes.

Refractory Aluminous Cements

... 1,199,682. Refractory binder and concretes. MINISTERUL INDUSTRIEI METALURGICE. 29 Feb., 1968 [3 July, 1967], No. 9765/68. Heading C1J. Refractory aluminous binder containing by weight 50-65% Al 2 O 3 , 9-15% CaO and 22- 37% BaO and not more than 1À5% SiO 2 , 1% Fe 2 O 3 , 1À5% MgO and 0À5% Na 2 O+K 2 O is made by sintering or fusing a very finely powdered intimate mixture of calcined alumina, limestone and either borytes or witherite at 1450‹ to 1650‹ C., slowly cooling and finely grinding the resultant clinker. Refractory concretes comprise 20% of the binder and 80% of alumina or magnesite aggregates.

Improvements in and relating to the production of hydraulic cement

... 303,639. Knibbs, N. V. S. Dec. 16, 1927. Cements, Portland and Roman.-A cement of the high alumina type is produced by subjecting a mixture of lime and bauxite or other highly aluminous material to the action of steam, preferably under pressure, to secure reaction between the raw materials, and then subjecting the resultant product to a higher temperature which is normally however below the melting- point. The proportions may vary from one to two parts of lime to three parts of bauxite. The bauxite is ground and mixed with either quick or hydrated lime. The steam treatment when carried out at a pressure of 100 lbs. per square inch may be completed in one hour. The heat treatment may be at a temperature between 1000‹ and 1400‹ C. With bauxite containing 50 per cent alumina and 20 per cent iron oxide, four hours heating at 1100‹ to 1150‹ C. is sufficient, or two hours at 1150‹ to 1200‹ C.

CEMENTITIOUS ARTICLES

... 1346779 Ships hulls ELKALITE Ltd 8 June 1971 [12 Feb 1971] 4596/71 Heading B7A [Also in Divisions C1 and H5] A heat hull is made by fixing a layer of polyvinyl chloride on to a male plug shaped to the cross-section of the hull, spraying a paste of an hydraulic high alumina cement, a thermoplastic polymeric material and water, together with a fibrous inorganic material on to the layer of polyvinyl chloride, and then spraying a mixture of styrene-butadiene copolymer upon the paste, and then curing, after which another layer of paste and fibre, and a final layer of the mixture of styrene-butadiene copolymer and water are sprayed on, and the hull allowed to cure. The thermoplastic polymeric material may be polyvinyl acetate, polyvinyl alcohol, a copolymer of styrene-butadiene or a vinyl-acrylic copolymer, and the fibrous inorganic material may be glass fibre, steel fibre or carbon fibre.

REFRACTORY BINDER

... 1437808 Phosphate binders IMPERIAL CHEMICAL INDUSTRIES Ltd 16 Sept 1974 [28 Sept 1973] 45432/73 Headings C1H and C1J A binder suitable for binding non-basic refractory aggregate comprises a mixture of a xCaO.yAl 2 O 3 , in which x : y is 3 : 1 to 1 : 5, and a water soluble aluminium phosphate, the molar ratio of P 2 O 5 (in the aluminium phosphate) : CaO (in the calcium aluminate) being 0À05 : 0À7. The aluminium phosphate may be a complex phosphate of aluminium containing one or more chemically bound H 2 O molecules and/or one or more chemically bound O-containing organic molecules and at least one acidic anion other than phosphate, e.g. AlPClH 25 C 8 O 8 , AlPClH 11 O 9 and AlPBrH 25 C 8 O 8 . Refractory aggregates include alumina, titanium oxides, zirconium silicate, zirconia, aluminium silicates (e.g. sillimanite, andulinite, kyamite and mullite), porcelain, china clays, silicon and tungsten carbides, silicon and boron nitrides, boron, asbestos, ferric oxide, chromium oxide, chromite ...

DEMOLITION-FACILITATING SUBSTANCE

CEMENT USEFUL FOR THE MANUFACTURE OF CORES AND MOULDS

EARLY STRENGTH CEMENTS

... 1387075 Cements ASSOCIATED PORTLAND CEMENT MFRS Ltd 16 Aug 1973 [16 Aug 1972] 38202/72 Heading ClH An early strength cement comprises, in weight per cent, 7-90 G 2 A7, the majority of the balance being Ca silicates, preferably 10-70 of C 3 S. Ca phosphate can be included in the raw materials for the G 2 A 7 rich clinker which can be interground (with the aid of N(EtOH) 3 +HAc) with a portland cement, together with accelerators (K 2 SO 4 ), retarders (citric acid, lignosulphonates, sugars) to a surface area 225-600 m.2/kg. The cement can be used with higher than normal water/cement ratios which helps in pumping slurries and in bonding wet aggregates, e.g. coal waste or shale, ores and a sandmolasses mix.

CEMENT COMPOSITIONS

COMPOSITION FOR AND METHOD OF MAKING WORKING MOULDS FOR THE CERAMIC INDUSTRIES

... 1323616 Porous mould composition METALLGESELLSCHAFT AG 30 April 1971 [2 May 1970] 12475/71 Heading C1H An hydraulic composition for producing a water-absorbent, porous mould for ceramic casting comprises 20-60 wt. per cent calcium aluminate cement, itself comprising 75-85 wt. per cent aluminium oxide and 25-15 wt.per cent calcium oxide; and 80-40 wt. per cent filler with a grain size of 40-160 Á and being wollas tonite, tiemolite or asbestos. In addition 1-4 wt. per cent glass fibres may be incorporated in the composition.

A method for the manufacture of hydralic binders from water treatment residuals

QUICK HARDENING CEMENT, WHICH CONTAINS CLINKERS ON THE BASIS OF WITH LIME MIXTURE CALCIUM FLUORINE ALUMINATE

Method for producing photocatalytically active clinker

In a method for producing photocatalytically active clinker, TiO 2 -containing materials are reacted to calcium titanates, particularly CaTiO 3 , with clinker raw meal or clinker raw mix.

Cementitious compositions

The invention provides a cementitious composition comprising a cement component comprising (i) an accelerant, (ii) a calcium sulphate source and (iii) an ettringite forming cement; an aggregate; and optionally water; wherein the cement has a minimum unconfined compressive strength of 1500 psi when tested in accordance with ASTM C1140 and/or C1604 at 15 minutes after placement; methods for its use and concrete formed from it.

Additives for a hydraulic binder based on belite-calcium-sulphoaluminate-ferrite clinker

A composition includes at least, in % expressed by mass relative to the total mass of the composition, from 0.01 to 3% of polycarboxylic acid or salts thereof, the polycarboxylic acid including 2 to 4 carboxyl groups per molecule; and from 97 to 99.99% of a Belite-Calcium-Sulphoaluminate-Ferrite clinker (BCSAF clinker).

ROOFING TILE WITH ENHANCED SURFACE DURABILITY AND PROCESSES FOR MANUFACTURING THE ROOLING TILE

A new roofing tile with enhanced surface durability and processes for manufacturing the same. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner. 1. A method of manufacturing a coated cement roofing tile; said coated cement roofing tile comprising: a cement roofing tile substrate with a coating disposed on said cement roofing tile substrate; said coating being configured to maximize surface durability during weathering , maximize surface smoothness during weathering , and maximize surface acid-erosion resistance during weathering; providing a cement roofing tile substrate;', at least about sixty percent by weight of a material comprising calcium aluminate; and', 'no more than about one percent by weight of a sulfate;, 'mixing water and a cementitious mixture to form a cementitious slurry; said cementitious slurry comprising a hydraulic binder; said hydraulic binder comprising, 'applying said cementitious slurry to said cement roofing tile substrate and forming a cementitious coating on said cement roofing tile substrate;', 'hydrating said cementitious coating on said cement roofing tile substrate to form a coated cement roofing tile; and', 'hardening said cementitious coating to form an at least partially finished cement roofing tile., 'said method comprising the steps of2. The method ...

METHOD FOR PRODUCING A CLINKER FOR HYDRAULIC CEMENT WITH LOW CO2 EMISSION AND HIGH RESISTANCE

A method for producing a clinker for cement, comprising grinding a raw flour comprising, especially, AlO, FeOand SOin contents such that the formula for calculating SOcontent of=0.261×AlO−0.638×FeO+k, where 2.5 Подробнее

HIGH PERFORMANCE SULFO-ALUMINOUS CLINKER

The invention relates to a sulfo-aluminous clinker with optimal setting time and short term compressive strengths, comprising a mixture of the following phases: calcium sulfoaluminate, or CA$, in amounts higher than 50% by weight of the mixture, belite, or CS, in amounts between 2 and 23%, 3CS 3C$ CaX, X being fluorine or chlorine, between 3 and 15% CACaX, X being fluorine or chlorine, between 2 and 12%, both fluorine and chlorine being altogether present in the mixture, and phase CS$ being absent. The invention also relates to a method for preparing this sulfo-aluminous clinker, and hydraulic binders comprising this clinker. 118-. (canceled)19. A sulfo-aluminous clinker comprising a mixture of:{'sub': 4', '3, '(i) calcium sulfoaluminate (CA$), in an amount greater than 50% by weight of said mixture,'}{'sub': '2', '(ii) belite (CS) in an amount ranging from 2% to 23% by weight of said mixture;'}{'sub': 2', '2, '(iii) 3CS3C$CaX, wherein X is fluorine or chlorine, in an amount ranging from 3% to 15% by weight of said mixture; and'}(iv) C11A7CaX2, wherein X is fluorine or chlorine, in an amount ranging from 2% to 12% by weight of said mixture;{'sub': 5', '2, 'wherein both fluorine and chlorine are present in said mixture, and CS$ is absent therefrom.'}20. The sulfo-aluminous clinker of claim 19 , comprising 3CS3C$CaFand CACaCl.21. The sulfo-aluminous clinker of claim 20 , further comprising CACaF.22. The sulfo-aluminous clinker of claim 19 , wherein said total combined amount of 3C$3C$CaXand CACaXis from 5% to 25% of said mixture.23. The sulfo-aluminous clinker of claim 19 , comprising from 0.01 to 10% by weight of at least one of: calcium sulfate or anhydrite (C$) claim 19 , a calcium aluminate (CA claim 19 , CA claim 19 , CAt) claim 19 , gehlenite (CAS) claim 19 , perovskite (CT) claim 19 , calcium iron titanate (CFT) claim 19 , merwinite (CMS) claim 19 , periclase claim 19 , free lime claim 19 , or ferrite (CAF or CF).24. The sulfo-aluminous clinker according to ...

CEMENT AND CONCRETE WITH CALCIUM ALUMINATES

Provided herein are systems, methods, and compositions related to mixtures of calcium aluminate cements with compositions comprising carbonate. The compositions comprising carbonates may be formed by sequestering carbon dioxide. 1. A cementitious composition , comprising: calcium aluminate cement (CAC) and a composition comprising carbonate wherein the composition comprising carbonate comprises a metastable component selected from the group consisting of vaterite , amorphous calcium carbonate , and combination thereof.2. The cementitious composition of claim 1 , wherein the composition comprising carbonate comprises or has at least one of the following:a) at least 50 wt % vaterite;{'sup': '13', 'b) a δC value less than −12.0‰;'}c) a wet paste pH of less than 12; and combinations thereof.3. The cementitious composition of claim 1 , wherein the composition comprising carbonate is a self-cement composition.4. The cementitious composition of claim 1 , wherein the composition comprising carbonate is a partial cement substitute.5. The cementitious composition of claim 1 , wherein the cementitious composition exhibits one or more of properties selected from the group consisting of higher reactivity of carbonate with aluminate phases claim 1 , formation of monocarboaluminates claim 1 , formation of hemicarboaluminates claim 1 , higher compressive strength claim 1 , higher durability over long time period claim 1 , higher mechanical and structural properties claim 1 , and combinations thereof claim 1 , as compared to CAC alone.6. The cementitious composition of claim 1 , wherein the composition comprising carbonate has a mean particle size of between 1-25 microns.7. The cementitious composition of claim 1 , wherein the cementitious composition further comprises ordinary Portland cement claim 1 , a Portland cement blend claim 1 , pozzolan-lime cement claim 1 , slag-lime cement claim 1 , supersulfated cement claim 1 , calcium sulfoaluminate cement claim 1 , geopolymer cement ...

DIMENSIONALLY STABLE GEOPOLYMER COMPOSITIONS AND METHOD

A method for making geopolymer cementitious binder compositions for cementitious products such as concrete, precast construction elements and panels, mortar and repair materials, and the like is disclosed. The geopolymer cementitious compositions of some embodiments are made by mixing a synergistic mixture of thermally activated aluminosilicate mineral, calcium aluminate cement, a calcium sulfate and a chemical activator with water 1. An aluminosilicate geopolymer composition comprising the reaction product of a thermally activated aluminosilicate mineral; a calcium aluminate cement; a calcium sulfate selected from the group consisting of calcium sulfate dihydrate , calcium sulfate hemihydrate , anhydrous calcium sulfate and mixtures thereof; a chemical activator selected from the group consisting of an alkali metal salt and an alkali metal base and mixtures thereof , and water.2. The aluminosilicate geopolymer composition of comprising the reaction product of about 35 to about 96% by weight of the thermally activated aluminosilicate mineral claim 1 , about 2 to about 45% by weight of the calcium aluminate cement claim 1 , about 1 to about 45% by weight of the calcium sulfate claim 1 , about 1.0 to about 6.0% by weight of the chemical activator selected from the group consisting of an alkali metal salt and an alkali metal base claim 1 , and water.3. The composition of claim 1 , wherein the chemical activator comprises an alkali metal citrate and the thermally activated aluminosilicate mineral comprises Class C fly ash.4. The composition of claim 1 , comprising a reaction product of amounts of the chemical activator and calcium sulfate relative to the amounts of the thermally activated aluminosilicate mineral and calcium aluminate cement effective to cause the reaction product to set in a predetermined time after mixing with water.5. The composition of claim 4 , wherein the amounts of the chemical activator and calcium sulfate relative to the amounts of thermally ...

DRY GROUT COMPOSITION AND CAPSULE FOR ANCHORING REINFORCING MEMBER, DOWEL OR ANCHOR ELEMENTS

A dry grout composition including a calcium aluminosulfate based hydraulic cement, a mineral filler, a thixotropic agent, and a superplasticizer agent. Also, an anchoring capsule, containing the dry grout composition, for use in anchoring reinforcing member dowel, or anchor elements in a hole of a substrate, and a method of use. 1. A cementitious anchoring capsule for use in anchoring a reinforcing member , dowel or anchor elements in a hole of a substrate , the capsule comprising:a water permeable encapsulating means wherein the encapsulating means is made of polyester; and 40% to 70% of a calcium aluminosulfate based hydraulic cement;', '40% to about 60% mineral filler which is sand;', '0.01% to about 5% of a thixotropic agent which is a cellulose-based colloidal agent; and', '0.01% to about 5% of a melamine sulfonate based superplasticizer agent,, 'a grout composition comprisingsaid amounts being based upon the total dry weight of said composition for a total of 100%, andsaid grout composition being encapsulated within said encapsulating means.2. The anchoring capsule as defined in claim 1 , wherein the cement contains less than 30% of alumina.3. The anchoring capsule as defined in claim 1 , wherein the cement contains between about 10% and about 25% of alumina.4. The anchoring capsule as defined in claim 1 , wherein the cement contains less than about 15% of alumina.5. The anchoring capsule as defined in claim 1 , wherein the grout composition contains about 1% thixotropic agent.6. The anchoring capsule as defined in claim 1 , wherein the grout composition contains less than about 0.1% thixotropic agent.7. The anchoring capsule as defined in claim 1 , wherein the grout composition contains from about 45% to about 55% mineral filler.8. The anchoring capsule as defined in claim 1 , wherein the grout composition further comprises class F flyash and/or silica fume compliant with ASTM C 1240.9. The anchoring capsule as defined in claim 1 , wherein the grout ...

Use Of Compounds Containing Aluminium Oxide And Silicon Oxide For Producing A Hydrophilic Building Product

The use of a binder system comprising compounds containing aluminium oxide and silicon oxide for producing a hydrophilic building product, characterized in that the sum of the oxides calculated as AlOand SiOin the binder system is ≧40% by weight, based on the water-free binder system, and the contact angle of an oil drop placed on the surface of the cured building product is ≧90°, where the contact angle determination is carried out under water, is proposed. The said hydrophilicity makes the building product easy to clean, with simple rinsing with water often being sufficient. 117-. (canceled)18. A hydrophilic building product obtained by contacting with water , setting and curing a binder system comprising compounds containing aluminium oxide and silicon oxide , wherein the sum of the oxides calculated as AlOand SiOin the binder system is ≧40% by weight , based on a water-free binder system , and the contact angle of an oil drop placed on the surface of the cured building product is ≧90° , where the contact angle determination is carried out under water.19. The building product according to claim 18 , wherein the sum of the oxides calculated as AlOand SiOin the binder system is ≧50% by weight based on the water-free binder system.20. The building product according to claim 18 , wherein the contact angle is ≧100°.21. The building product according to claim 18 , wherein the content of the oxides calculated as SiOin the binder system is ≧15% by weight claim 18 , based on the water-free binder system.22. The building product according to claim 18 , wherein the binder system further comprises compounds containing titanium oxide and/or zirconium oxide and the sum of the oxides calculated as AlO claim 18 , SiO claim 18 , TiOand ZrOin the binder system is ≧41% by weight claim 18 , based on the water-free binder system.23. The building product according to claim 18 , wherein the content of oxides calculated as CaO in the binder system is ≦35% by weight claim 18 , based on ...

OPTIMIZATION OF THE PROPERTIES OF ALUMINOUS CEMENTS USING INORGANIC FILLERS

The carefully controlled addition of inorganic fillers to calcium sulfoaluminate rapid-setting cements can lead to significant improvement and optimization of its properties. Generally, prior art achieves cement optimization using costly and unstable organic additives. In the present invention, the addition of three inorganic additives such as coal ash, limestone or kiln dust led to appreciable improvement in the properties of calcium sulfoaluminate-containing cements. The addition of coal fly ash led to increased compressive strength and freeze-thaw durability while decreasing shrinkage and autoclave expansion. The addition of limestone was shown to control the compressive strength while not affecting the setting time, and the addition of cement kiln dust was shown to control the compressive strength while increasing the setting time. And finally, the presence of a super plasticizing agent was shown to negatively affect both compressive strength and shrinkage when used in combination with fly ash. 1. A rapid-setting material consisting of calcium sulfoaluminate cement and coal fly ash , the amount of coal fly ash being up to 30% by weight of the material.2. The material of wherein the coal fly ash content is at least approximately 5% by weight.3. The material of wherein the amount of coal fly ash is 10-30 wt % coal fly ash claim 1 , whereby the resulting 1.5 hour claim 1 , 3 hour or 24 hour compressive strength is increased by 500 to 1 claim 1 ,000 psi compared to the strength of the pure calcium sulfoaluminate-containing cement.4. The material of which passes autoclave testing due to the addition of coal fly ash.5. The material of in which ettringite content has increased after hydration claim 1 , when compared to calcium sulfoaluminate cement without coal fly ash.6. The cement of which claim 1 , when tested using ASTM C 157 claim 1 , exhibits a shrinkage of less than 0.02% at 28 days.7. A rapid-setting material comprising calcium sulfoaluminate cement and coal ...

Dry grout composition and capsule for anchoring reinforcing member, dowel or anchor elements

A dry grout composition including a calcium aluminosulfate based hydraulic cement, a mineral filler, a thixotropic agent, and a superplasticizer agent. Also, an anchoring capsule, containing the dry grout composition, for use in anchoring reinforcing member dowel, or anchor elements in a hole of a substrate, and a method of use.

PROCESS FOR THE PREPARATION OF HIGH ALUMINA CEMENT

High alumina cement is produced in a submerged combustion melter, cooled and ground. 1. Process for the preparation of high alumina cement comprising:introducing a solid batch material for preparation of high alumina cement into a melter;melting the solid batch material in the melter by submerged combustion to form a liquid melt;withdrawing at least a portion of the liquid melt from the melter;cooling said discharged liquid melt to obtain solidified melt; andgrinding the solidified melt to appropriate grain size.2. The process of claim 1 , wherein the melting chamber walls are cooled claim 1 , for example comprising double steel walls separated by circulating cooling liquid claim 1 , preferably water claim 1 , and are not covered by a refractory lining.3. The process of claim 1 , wherein heat is recovered from the hot fumes and/or from the cooling liquid.4. The process of wherein heat is recovered from the hot fumes to preheat the raw materials.5. The process of wherein part at least of the melt is withdrawn continuously or batchwise from the melter.6. The process of wherein the submerged burners of the melter are controlled such that the melt volume is increased by at least 8% claim 1 , preferably at least 10% claim 1 , more preferably at least 15% or 20% claim 1 , compared to the volume the melt would have with no burners firing.7. The process wherein the submerged combustion is performed such that a substantially toroidal melt flow pattern is generated in the melt claim 1 , having a substantially vertical central axis of revolution claim 1 , comprising major centrally inwardly convergent flows at the melt surface; the melt moves downwardly at proximity of the vertical central axis of revolution and is recirculated in an ascending movement back to the melt surface claim 1 , thus defining an substantially toroidal flow pattern.8. The process of wherein the melting step comprises melting the solid batch material claim 1 , in a submerged combustion melter by ...

COMPOSITIONS OF LOW ACTIVATION CONCRETE AND USE THEREOF

The present invention relates to a low-activation concrete comprising high-purity limestone aggregate and white cement, or high-purity limestone aggregate and aluminous cement. The low-activation concrete reduces the content of Europium, Cobalt and Cesium, as well as the content of elements such as Aluminium, Sodium, and Magnesium, when compared to standard concrete compositions and compositions for low-activation concrete already known in the art. The use of the low-activation concrete for forming an interior wall of a particle accelerator vault is provided as well. 1. A low-activation concrete comprising high-purity limestone aggregate and white cement , or high-purity limestone aggregate and aluminous cement ,{'sub': '3', 'the high-purity limestone aggregate comprising more than 97.0% by weight CaCO,'}wherein in the low-activation concrete comprising high-purity limestone aggregate and white cement the Eu content is less than 0.04 ppm, the Co content is less than 0.80 ppm, and the Cs content is less than 0.1 ppm, andwherein in the low-activation concrete comprising high-purity limestone aggregate and aluminous cement the Eu content is less than 0.01 ppm, the Co content is less than 0.26 ppm, and the Cs content is less than 0.03 ppm.2. The low-activation concrete according to claim 1 , wherein the concrete comprises 75% to 95% by weight high-purity limestone aggregate.3. The low-activation concrete according to claim 1 , wherein the concrete comprises 75% to 85% by weight high-purity limestone aggregate.4. The low-activation concrete according to claim 1 , wherein the high-purity limestone aggregate comprises between 97.0% and 98.5% by weight CaCO.5. The low-activation concrete according to claim 1 , wherein the high-purity limestone aggregate comprises between 54.3% and 55.2% by weight CaO claim 1 , between 0.8% and 1.0% by weight MgO claim 1 , between 0.2% and 0.6% by weight SiO claim 1 , between 0.05% and 0.1% by weight FeO claim 1 , less than 0.3% by weight ...

BRIQUETTES

A briquette for use as a mineral charge in a cupola furnace for the production of mineral wool fibres is produced by 113.-. (canceled)14. A method of producing a briquette , suitable for use as a mineral charge in a cupola furnace for the production of mineral wool fibres , said method comprising: a) recycled waste mineral wool,', 'b) cement, and', 'c) at least 10 parts by dry weight of sugar(s) with respect to 100 parts by dry weight of the cement; and, 'forming a mouldable mixture comprising'}moulding and curing the mouldable mixture to form the briquette.15. The method of claim 14 , wherein the mouldable mixture comprises 10 to 40 parts by dry weight of sugar(s) per 100 parts by dry weight of cement.16. The method of claim 14 , wherein the cement is selected from the group consisting of Portland cement claim 14 , alumina cement and mixture thereof.17. The method of claim 14 , wherein the sugar(s) are selected from the group consisting of dextrose claim 14 , fructose claim 14 , sucrose and high fructose corn syrup.18. The method of claim 14 , wherein the recycled waste mineral wool comprises waste mineral wool comprising uncured sugar containing binder wherein the uncured sugar containing binder is selected from:i) an uncured sugar containing binder comprising reducing sugar(s) and nitrogen-containing compound(s);ii) an uncured sugar containing binder comprising curable reaction product(s) of reducing sugar(s) and nitrogen-containing compound(s); andiii) an uncured sugar containing binder comprising reducing sugar(s), nitrogen-containing compound(s) and curable reaction product(s) of reducing sugar(s) and nitrogen-containing compound(s).19. The method of claim 14 , wherein the recycled waste mineral wool comprises waste mineral wool comprising cured binder claim 14 , wherein the cured binder comprises nitrogenous polymer claim 14 , wherein the cured binder comprises greater than 2% by mass and less than 8% by mass nitrogen claim 14 , and wherein the cured binder ...

Impregnated Cloth

A knitted spacer fabric has a tightly knitted bottom layer, a more loosely knitted upper layer and linking fibres extending across the space between the lower and upper faces. Settable material, e.g. cement, is introduced into the space between the upper and lower faces and can be caused to set by the addition of a liquid, e.g. water. Until set, the fabric is flexible and can be shaped but after the material in space has set, the fabric is rigid and can be used as a structural element in a wide range of situations. The bottom layer has an extension that extends beyond the upper face and is connected to the upper face by elastic connecting fibres that draw the extension towards the other face, thereby at least partly closing the space at the edge of the cloth and preventing the settable material from spilling out. In addition, the packing of the settable material and maximum space between the faces are such that only a predetermined amount of liquid can be accommodated within the space and that amount is matched to the water required to set the cement. 115.-. (canceled)17. A cloth as claimed in claim 16 , in which the first face and/or second face is backed by a further layer such as a damp proof layer being impervious to liquids or gases claim 16 , said further layer preferably being formed from PVC.18. A cloth as claimed in claim 17 , in which the PVC layer is applied as a paste and is cured by the application of heat.19. A cloth as claimed in claim 16 , in which the first face includes an elastomeric yarn.20. A cloth as claimed in claim 19 , in which the first face has pores which are at least partly sealed or have been reduced in size claim 19 , thereby retaining the settable powder material within the space.21. A cloth as claimed in claim 20 , in which the pores are at least partly sealed by a sealant such as an adhesive claim 20 , a heat curable material or a layer of material applied to the first face.22. A cloth as claimed in claim 16 , in which the second ...

NOVEL SULFO-ALUMINOUS CLINKER WITH A LOW BELITE CONTENT

The present invention relates to a new sulfo-aluminate based clinker with a low belite content, a method for preparing this clinker, as well as the use of the clinker for preparing a hydraulic binder, and later on, grout, concrete or mortar. 1. A sulfo-aluminate based clinker , the phase composition of which comprises , with respect to the total weight of the clinker:{'sub': 4', 'x', 'y', 'z, 'from 20 to 90 % of a calcium sulfoaluminate phase corresponding to the formula CAF$, withx varying from 2 to 3,y varying from 0 to 0.5,and z varying from 0.8 to 1.2;{'sub': 6', 'x′', 'y′, 'from 0 to 25 % of a calcium aluminoferrite phase the composition of which corresponds to the general formula CAF, with x′ varying from 0 to 1.5 and y′ varying from 0.5 to 3; and'}{'sub': '2', 'less than 20 % belite CS phase; and'}{'sub': 11', '4, 'less than 2 % of a CSB phase;'}2. The clinker according to claim 1 , wherein it contains from 30 to 80% of an iron-doped calcium sulfo-aluminate phase CAF$.3. The clinker according to claim 1 , wherein x varies from 2.1 to 2.9 and/or y varies from 0.05 to 0.5.4. The clinker according to claim 1 , wherein it contains from 0 to 20% of a calcium aluminoferrite phase CAF.5. The clinker according to claim 1 , wherein x′ varies from 0.65 to 1.3 and/or y′ varies from 1.5 to 1.5 to 2.5.6. The clinker according to claim 1 , wherein it contains less than 1% CSB phase.7. The clinker according to claim 1 , it contains less than 15% CS belite phase.8. The clinker according to claim 1 , wherein it contains less than 3% CaOl.9. The clinker according to claim 1 , wherein it contains less than 5% C$.10. The clinker according to claim 1 , wherein it contains less than 10% CAS.11. A method for preparing a clinker according to comprising the following steps: [{'sub': '2', 'from 0.1 to 40% bauxite, marlstones, red muds and/or any other sedimentary, metamorphic or magmatic rocks or industrial mineral derivatives with a high aluminum content and a SiOcontent less than 20 ...

Impregnated Cloth

A knitted spacer fabric has a tightly knitted bottom layer, a more loosely knitted upper layer and linking fibres extending across the space between the lower and upper faces. Settable material, e.g. cement, is introduced into the space between the upper and lower faces and can be caused to set by the addition of a liquid, e.g. water. Until set, the fabric is flexible and can be shaped but after the material in space has set, the fabric is rigid and can be used as a structural element in a wide range of situations. The bottom layer has an extension that extends beyond the upper face and is connected to the upper face by elastic connecting fibres that draw the extension towards the other face, thereby at least partly closing the space at the edge of the cloth and preventing the settable material from spilling out. In addition, the packing of the settable material and maximum space between the faces are such that only a predetermined amount of liquid can be accommodated within the space and that amount is matched to the water required to set the cement. 115-. (canceled)16. A flexible cloth that can be set to become rigid or semi-rigid , the cloth comprising:a first face;a second face separated from the first face by a space;linking fibres extending between the first and second faces; anda powder material located in the space between the first and second faces, which material is capable of setting to a rigid or semi-rigid solid on the addition of a liquid,wherein, the volume of space between the two faces of the cloth is limited by the linking fibres constraining how far the faces can be moved apart, and wherein the fibres provide reinforcement to the fill material on setting.17. The cloth of claim 16 , wherein the two faces of the cloth are constrained by the arrangement claim 16 , shape and physical properties of the linking fibres.18. The cloth of claim 16 , wherein the linking fibres are the same material as the first face or the second face.19. The cloth of claim ...

NOVEL PHOSPHORUS-DOPED SULFO-BELITIC CLINKER

A new phosphorus-doped sulfo-belite-based clinker, a method for preparing this clinker, as well as the use of the clinker for preparing a hydraulic binder and, later on, grout, concrete or mortar. 1. A sulfo-aluminate-based clinker , the phase composition of which comprises , with respect to the total weight of the clinker:{'sub': 4', 'x', 'y', 'z, 'claim-text': x varying from 2 to 3,', 'y varying from 0 to 0.5,', 'and z varying from 0.8 to 1.2;', {'sub': 6', 'x′', 'y′, 'from 0 to 25% of a calcium aluminoferrite phase the composition of which corresponds to the general formula CAF, with x′ varying from 0 to 1.5 and y′ varying from 0.5 to 3; and'}, {'sub': '2', 'from 20 to 70% of a belite CS phase; and'}, {'sub': 11', '4, 'less than 10% of a CSB phase;'}, {'sub': 2', '5, 'said clinker comprising more than 0.3% of PO.'}], 'from 5 to 60% of a calcium sulfo-aluminate phase corresponding to formula CAF$, with2. The clinker according to claim 1 , wherein it contains from 10 to 50% of an iron-doped calcium sulfo-aluminate phase CAF$.3. The clinker according to claim 1 , wherein x varies from 2.1 to 2.9 and/or y varies from 0.05 to 0.5.4. The clinker according to claim 1 , wherein it contains from 0 to 20% of a calcium aluminoferrite phase CAF.5. The clinker according to claim 1 , wherein x′ varies from 0.65 to 1.3 and/or y′ varies from 1.5 to 2.5.6. The clinker according to claim 1 , wherein it contains from 30% to 55% of a belite CS phase.7. The clinker according to claim 1 , wherein it contains less than 5% CSB phase.8. The clinker according to claim 1 , wherein it contains more than 0.5% PO.9. The clinker according to claim 1 , wherein it contains less than 3% CaOI.10. The clinker according to claim 1 , wherein it contains less than 5% C$.11. The clinker according to claim 1 , wherein it contains less than 10% CAS.12. A method for preparing a clinker according to comprising the following steps: 'from 0.1 to 40% bauxite, marlstones, red muds and/or any other sedimentary, ...

MIXING DEVICE, MIXING BLADES AND METHOD FOR MIXING CALCIUM ALUMINATE-CONTAINING SLURRIES

A mixing device having a mixing container and has a single-shaft agitator that extends into the mixing container. At the end of the drive shaft, a rotor body is arranged slightly above the bottom of the mixing container. The rotor body comprises a plurality of mixing blades, wherein the blades are, in one example, star-shaped and fixed in position to each other. A first end of the drive shaft is coupled to a motor and a second end of the drive shaft is configured to extend into the mixing vessel, wherein the blades are attached onto the second end of the drive shaft. The blades in one example include at least two coincidental knife-edged blades such that at least one of the knife-edged blades is facing upward. The mixing device in one example is used to mix calcium aluminate-containing slurries. 1. A mixing device for mixing a calcium aluminate-containing slurry , comprising:a mixing vessel having an interior bottom surface and interior walls, wherein the mixing vessel is configured to contain the slurry;a motor-controlled drive shaft, wherein a first end of said drive shaft is coupled to a motor and a second end of the drive shaft is configured to extend into said mixing vessel; anda blade system attached onto said second end of the drive shaft, wherein the blade system includes at least two coincidental knife-edged blades such that at least one of the knife-edged blades is facing upward, wherein the knife-edged blades can be move up or down in the mixing vessel, and wherein the rotational speed of the knife-edged blades can be adjusted to be between 500 rpm to 5000 rpm.2. The device according to claim 1 , wherein the blade system includes a third knife-edged blade perpendicular to said two coincidental knife-edged blades.3. The device according to claim 1 , wherein the second end of the drive shaft is coated and substantially inside of the mixing vessel.4. The device according to claim 1 , wherein the knife-edged blades are made of stainless steel and/or are ...

Geopolymer compositions and methods for making same

Geopolymer compositions utilizing fly ash and an inorganic mineral including alkaline earth metal oxide as cementitious reactive components. The inorganic mineral includes alkaline earth metal oxide preferably calcium oxide (also known as lime or quicklime) or magnesium oxide, or combinations thereof. The cementitious reactive powder may also optionally include one or more aluminous cements and one or more source of calcium sulfates. The cementitious reactive powders are activated with an alkali metal chemical activator selected from at least one member of the group consisting of an alkali metal salt and an alkali metal base. The inorganic minerals including alkaline earth metal oxide preferred in this invention have an alkaline earth metal oxide content preferably greater than 50 wt %, more preferably greater than 60 wt %, even more preferably greater than 70 wt %, and most preferably greater than 80 wt %, for example greater than 90 wt %. Methods for making the compositions are also disclosed.

PROCESS FOR THE PRODUCTION OF BINDERS

The invention relates to a process for the production of binders by calcinating mineral raw material mixtures. In order to improve the process and the quality of the binders, it is proposed that oil shale and/or oil sand fills are converted by targeted agglomeration into particles of a certain size and consistency, wherein the water content for the mechanical stabilization of the agglomerate is adjusted to less than 25 percent and the agglomerates are calcinated to form binders at temperatures between 800 and 1500° C. under reductive conditions over the entire process with a Lambda value <1 in a vertical shaft furnace with updraft gasification. The binding properties are adjusted by the targeted addition of CaO-containing substances and/or existing sulfur fractions of the oil sands and/or oil shales are bound by means of the CaO that is present in the starting material and/or added. 1. A process for the production of binders by burning mineral raw-material mixtures , characterized in that oil shale and/or oil sand beds are converted by purposeful agglomeration into particles of a certain size and consistency , and the water component is adjusted to less than 25% for mechanically stabilizing the agglomerate , and the agglomerates are burned at temperatures between 800° C. and 1500° C. under reductive conditions throughout the entire process at a lambda <1 in a vertical shaft furnace with countercurrent gasification into binders , and the binder properties are adjusted by purposeful addition of CaO-containing substances and/or sulfur components of the oil sand and/or oil shale are bound by means of the CaO that is present in and/or added to the starting material.2. The process of claim 1 , characterized in that the oil shale and/or oil sand is purposefully comminuted prior to the agglomeration and/or the oil shale is purposefully comminuted to a certain size and added to the bed along with the agglomerates.3. The process of or claim 1 , characterized in that the water ...

RAPID-SETTING AND HARDENING, HIGH-BELITE SULFOALUMINATE CEMENT CLINKER AS WELL AS APPLICATION AND PRODUCTION PROCESS THEREOF

The invention discloses a rapid-hardening high-belite calcium sulfoaluminate cement clinker and relates generally to a rapid-hardening high-belite calcium sulfoaluminate cement clinker and methods to use and to manufacture the clinker. The clinker of the present invention comprises 20% to 35% by weight of CA 3% to 9% by weight of CAF, 37% to 47% by weight of CS, 0.5% to 4.6% by weight of f-Ca° and 14% to 26.3% by weight of CaSO. The chemical compositions of the clinker are 12.9% to 16.1% by weight of SiO, 12% to 19% by weight of AlO, 1% to 3% by weight of FeO, 49% to 54% by weight of CaO and 12% to 18.43% by weight of SO. It is manufactured by calcining, at a temperature of 1300° C.±50° C. in a rotary kiln, the raw meal, comprising 33% to 62% by weight of limestone, 10.5% to 28% by weight of fly ash, and 19% to 45% by weight of FGD gypsum. A group of rapid-hardening high-strength cements of various strength classes can be manufactured by mixing and grinding 26% to 97% by weight of clinker, 3% to 19% by weight of anhydrite and 0% to 55% by weight of granulated blast furnace slag. 1. A rapid-hardening high-belite calcium sulfoaluminate cement clinker , comprising the following major constituent components: CA , CAF , CS and CaSO , wherein said clinker contains 0.5% to 4.6% by weight of f-CaO.2. The rapid-hardening high-belite calcium sulfoaluminate cement clinker of claim 1 , wherein said clinker comprises 20% to 35% by weight of CA8 claim 1 , 3% to 9% by weight of CAF claim 1 , 37% to 47% by weight of CS claim 1 , 0.5% to 4.6% by weight of f-CaO and 14% to 26.3% by weight of CaSO claim 1 , and the rest are minor additional components.3. The rapid-hardening high-belite calcium sulfoaluminate cement clinker of claim 2 , comprising ≦7% by weight of said minor additional components.4. The rapid-hardening high-belite calcium sulfoaluminate cement clinker of claim 2 , wherein said minor additional phases include components comprise MgO claim 2 , or CaO.TiO claim 2 , or ...

Hydraulic Cements, Methods and Products

Non-aqueous, hydraulic cement-forming compositions comprise a non-aqueous mixture of (a) a non-hydrated powder composition comprising calcium aluminate powder, and (b) non-aqueous water-miscible liquid. Hardened cements are formed from such hydraulic cement-forming compositions, and methods of producing hardened cements, kits, and articles of manufacture employ such hydraulic cement-forming compositions.

Calcium Aluminate Cement Bonded Ceramic Matrix For Use As Heat Resistant Countertops and Similar Components in the Building and Construction Industry

A heat resistant countertop or a heat resistant three dimensional shape product comprising a composition comprising at least one aggregate, at least one cement, at least one fine material, at least one dispersant, and at least one viscosity modifier, and optionally at least one set retarder, and optionally at least one set accelerator. A heat resistant countertop or a heat resistant three dimensional shape product comprising a calcium aluminate cement hydraulic binder and matrix is provided. 1. A heat resistant countertop or a heat resistant three dimensional shape product comprising a composition comprising at least one aggregate , at least one cement , at least one fine material , at least one dispersant , and at least one viscosity modifier , and optionally at least one set retarder , and optionally at least one set accelerator.2. The heat resistant countertop or heat resistant three dimensional shape product of wherein said aggregate is at least one selected from the group consisting of a tabular alumina claim 1 , a fused white alumina claim 1 , a silicon carbide claim 1 , an andalusite claim 1 , a fire clay claim 1 , a mullite claim 1 , a recycled glass claim 1 , and a natural stone.3. The heat resistant countertop or heat resistant three dimensional shape product of wherein said natural stone is a marble claim 2 , a granite claim 2 , a shale claim 2 , or a river rock.4. The heat resistant countertop or heat resistant three dimensional shape product of wherein said cement is at least one selected from the group of a 40% to 80% alumina containing calcium aluminate cement.5. The heat resistant countertop or heat resistant three dimensional shape product of wherein said fine material is at least one selected from the group consisting of a calcined alumina claim 1 , a reactive alumina claim 1 , a clay claim 1 , a kyanite claim 1 , a micro silica claim 1 , and a silica sand.6. The heat resistant countertop or heat resistant three dimensional shape product of wherein ...

UNSHAPED REFRACTORY MATERIAL

In order to address the technical problem of allowing an unshaped refractory material using a spinel-containing alumina cement to provide further improved corrosion resistance and slag infiltration resistance while reducing the occurrence of crack/peeling, an unshaped refractory material is provided which comprises a refractory raw material mixture having a particle size of 8 mm or less, with the refractory raw material mixture having an alumina cement at least a part of which is a spinel-containing alumina cement, and, with respect to 100 mass % of the refractory raw material mixture, the alumina cement contains CaO in an amount of 0.5 to 2.5 mass %, and the spinel-containing alumina cement contains spinel in an amount of 3.5 to 10.5 mass %. 1. An unshaped refractory material comprising a refractory raw material mixture having a particle size of 8 mm or less , the refractory raw material mixture comprising an alumina cement at least a part of which is a spinel-containing alumina cement , wherein , with respect to 100 mass % of the refractory raw material mixture , the alumina cement contains CaO in an amount of 0.5 to 2.5 mass % , and the spinel-containing alumina cement contains spinel in an amount of 3.5 to 10.5 mass %.2. The unshaped refractory material of claim 1 , wherein the refractory raw material mixture further comprises a spinel raw material having a particle size of 0.1 mm or less claim 1 , and wherein a total content of the spinel raw material and the spinel contained in the spinel-containing alumina cement is in the range of 5.5 to 22 mass % claim 1 , with respect to 100 mass % of the refractory raw material mixture.3. The unshaped refractory material of claim 1 , wherein the refractory raw material mixture further comprises a magnesia raw material having a particle size of 0.1 mm or less claim 1 , and wherein a content of the magnesia raw material is in the range of 2 to 9 mass % claim 1 , with respect to 100 mass % of the refractory raw material ...

ULTRA HIGH PERFORMANCE CONCRETE COMPOSITION ALLOWING UNIFORM DISTRIBUTION OF REINFORCING FIBER, CONCRETE SLOTTED FLOOR MANUFACTURED USING SAME, AND METHOD FOR MANUFACTURING SAME

The present disclosure relates to a “concrete slotted floor” manufactured from an UHPC composition which exhibits superior crack resistance due to uniform distribution of reinforcing fibers even when a residing surface is located below, allows early demolding due to fast initial setting time and exhibits improved cleaning efficiency due to maximized surface water repellency, an “UHPC composition for manufacturing the same” and a “method for manufacturing a concrete slotted floor using the same”.

PROCESS FOR THE PREPARATION OF HIGH ALUMINA CEMENT

High alumina cement is produced in a submerged combustion melter, cooled and ground. 1. Process for the preparation of high alumina cement comprising:introducing a solid batch material for preparation of high alumina cement into a melter;melting the solid batch material in the melter by submerged combustion to form a liquid melt;withdrawing at least a portion of the liquid melt from the melter;cooling said discharged liquid melt to obtain solidified melt; andgrinding the solidified melt to appropriate grain size.2. The process of claim 1 , wherein the melting chamber walls are cooled comprising double steel walls separated by circulating cooling liquid claim 1 , and are not covered by a refractory lining.3. The process of claim 1 , wherein heat is recovered from the hot fumes and/or from the cooling liquid.4. The process of wherein heat is recovered from the hot fumes to preheat the raw materials.5. The process of wherein part at least of the melt is withdrawn continuously or batchwise from the melter.6. The process of wherein the submerged burners of the melter are controlled such that the melt volume is increased by at least 8% compared to the volume the melt would have with no burners firing.7. The process of wherein the submerged combustion is performed such that a substantially toroidal melt flow pattern is generated in the melt claim 1 , having a substantially vertical central axis of revolution claim 1 , comprising major centrally inwardly convergent flows at the melt surface; the melt moves downwardly at proximity of the vertical central axis of revolution and is recirculated in an ascending movement back to the melt surface claim 1 , thus defining an substantially toroidal flow pattern.8. The process of any of wherein the melting step comprises melting the solid batch material claim 1 , in a submerged combustion melter by subjecting the melt to a flow pattern which when simulated by computational fluid dynamic analysis shows a substantially toroidal melt ...

Method for Producing Cement

A method for producing calcium sulfoaluminate cement comprises the steps of providing thermal energy by combustion of sulphur and/or a sulphur-containing compound, reacting sulphur oxides produced by combustion of the sulphur and/or sulphur-containing compound with a mixture of calcium oxide and/or carbonate, and alumina and/or its hydrates to form a sulphur-containing mixture, heating the sulphur-containing mixture using the thermal energy to produce a clinker, and reacting remaining sulphur oxides produced by combustion of the sulphur and/or sulphur-containing compound with lime. The sulphur and/or sulphur-containing compound preferably comprises elemental sulphur, sour crude, sour gas or calcium sulfate. 1. A method for producing calcium sulfoaluminate cement which comprises the steps of:providing thermal energy by combustion of sulphur and/or a sulphur-containing compound;reacting sulphur oxides produced by combustion of the sulphur and/or sulphur-containing compound with a mixture of calcium oxide and/or carbonate, and alumina and/or its hydrates to form a sulphur-containing mixture;heating the sulphur-containing mixture using the thermal energy to produce a clinker; andreacting remaining sulphur oxides produced by combustion of the sulphur and/or sulphur-containing compound with lime.2. A method according to wherein the sulphur and/or sulphur-containing compound comprises elemental sulphur claim 1 , sour crude claim 1 , sour gas or calcium sulfate.3. A method according to wherein the combustion gases comprise 5-15% sulphur oxides.4. A method according to wherein the sulphur oxides produced by combustion of the sulphur and/or sulphur-containing compound are reacted with the mixture of calcium oxide and/or carbonate claim 1 , and alumina and/or its hydrates in a suspension or cyclone pre-heater.5. A method according to wherein the sulphur oxides produced by combustion of the sulphur or sulphur-containing compound are reacted with the mixture of calcium oxide and ...

LOW EFFLORESCENCE TILE GROUT COMPOSITION

The present invention provides a dry mix of cement, sand, metakaolin in the amount of 5 wt % or less, based on total solids in the dry mix, and aluminum cement in a low amount (≦1 wt. %, based on total solids in the dry mix) useful as a tile grout, as well as uses thereof and to methods of using the same as a tile grout. The dry mix when made into a mortar exhibits excellent resistance to efflorescence as a tile grout. 1. A low efflorescence tile grout composition comprising a dry mix of a) Portland cement , b) sand or aggregate , c) from 0.01 to 1.0 wt. % , based on total solids in the dry mix , of an aluminum cement , d) a fatty acid or a fatty acid salt of an alkali metal , an alkaline earth metal or a divalent metal , and e) metakaolin.2. The dry mix composition as claimed in claim 1 , wherein the amount of aluminum cement c) ranges from 0.4 to 0.98 wt. % claim 1 , based on total solids in the dry mix composition.3. The dry mix composition as claimed in claim 1 , wherein the amount of metakaolin e) ranges from 0.5 to 5.0 wt. % claim 1 , based on total solids in the dry mix composition.4. The dry mix composition as claimed in claim 3 , wherein the amount of metakaolin e) ranges from 0.5 to less than 1.0 wt. %5. The dry mix composition as claimed in claim 1 , comprising from 30 to 50 wt. % of the Portland cement a).6. The dry mix composition as claimed in claim 5 , further comprising one or more filler.7. The dry mix composition as claimed in claim 1 , wherein the sand or aggregate b) has particle size range of 0.08-0.6 mm.8. The dry mix composition as claimed in claim 1 , wherein the fatty acid or fatty acid salt of an alkali metal claim 1 , alkaline earth metal or a divalent metal d) comprises sodium oleate.9. Use of the dry mix compositions as claimed in any one of to as a tile grout.10. A methods of using a low efflorescence tile grout dry mix composition comprising combining the dry mix compositions of any one of to with water claim 1 , allowing the mixture ...

Freeze-thaw durable geopolymer compositions and methods for making same

A freeze-thaw durable, dimensionally stable, geopolymer composition including: cementitious reactive powder including thermally activated aluminosilicate mineral, aluminate cement preferably selected from at least one of calcium sulfoaluminate cement and calcium aluminate cement, and calcium sulfate selected from at least one of calcium sulfate dihydrate, calcium sulfate hemihydrate, and anhydrous calcium sulfate; alkali metal chemical activator; and a freeze-thaw durability component selected from at least one of air-entraining agent, defoaming agent, and surface active organic polymer; wherein the composition has an air content of about 4% to 20% by volume, more preferably about 4% to 12% by volume, and most preferably about 4% to 8% by volume. The compositions are made from a slurry wherein the water/cementitious reactive powder weight ratio is 0.14 to 0.45:1, preferably 0.16 to 0.35:1, and more preferably 0.18 to 0.25:1. Methods for making the compositions are also disclosed.

Fast setting low permeability cement and concrete

A calcium sulfoaluminate-based concrete with a permeability of less than 1000 Coulombs. Rapid-setting low chloride-ion permeability calcium sulfoaluminate (CSA) cements and concretes include CSA and a suitable polymer such as a sol-gel derived, organic-inorganic, silica based hybrid coating solutions of polystyrene-butylacrylate polymers containing active silanol groups protected by hydroxyl groups containing polyalcohol, or other polymers. Such polymers may be added as powders or as liquid in the finish mill. Other rapid-setting low chloride-ion permeability (CSA) cements and concretes include CSA with selected particle size distributions, and do not require use of any polymer. These CSA cements and concretes have low chloride-ion permeability, high early strength, fast setting times, low-shrinkage, and high freeze-thaw resistance.

PRODUCTION OF SUPPLEMENTARY CEMENTITIOUS MATERIALS THROUGH WET CARBONATION METHOD

A method of making a supplementary cementitious material is described that includes: forming a slurry comprising water and a carbonatable material powder, wherein a weight ratio of water to the carbonatable material powder is at least 1; and flowing a gas comprising carbon dioxide into the slurry for 0.5 to 24 hours while maintaining the slurry at a temperature of 1° C. to 99° C. to form a carbonated slurry comprising CaCOand amorphous silica. A method of forming cement or concrete using the supplemental cementitious material is also described. 1. A method of making a supplementary cementitious material comprising:forming a slurry comprising water and a carbonatable material powder, wherein a weight ratio of water to the carbonatable material powder in the slurry is at least 1; and{'sub': '3', 'flowing a gas comprising carbon dioxide into the slurry for 0.5 to 24 hours while maintaining the slurry at a temperature of 1° C. to 99° C. to form a carbonated slurry comprising CaCOand amorphous silica.'}2. The method of claim 1 , wherein the carbonatable material powder includes at least one synthetic formulation having the general formula MMeO claim 1 , MMe(OH) claim 1 , MMeO(OH)or MMeO(OH)·(HO) claim 1 , wherein M is at least one metal that can react to form a carbonate and Me is at least one element that can form an oxide during the carbonation reaction.3. The method of claim 2 , wherein M is calcium and/or magnesium.4. The method of claim 3 , wherein Me is silicon claim 3 , titanium claim 3 , aluminum claim 3 , phosphorus claim 3 , vanadium claim 3 , tungsten claim 3 , molybdenum claim 3 , gallium claim 3 , manganese claim 3 , zirconium claim 3 , germanium claim 3 , copper claim 3 , niobium claim 3 , cobalt claim 3 , lead claim 3 , iron claim 3 , indium claim 3 , arsenic claim 3 , sulfur and/or tantalum.5. The method of claim 4 , wherein Me is silicon.6. The method of claim 2 , wherein a ratio of a:b is about 2.5:1 to about 0.167:1 claim 2 , c is 3 or greater claim 2 ...

LOW-BELITE CSA CEMENT FOR CONSTRUCTION-CHEMICAL APPLICATIONS

The invention relates to a calcium sulfoaluminate cement, whereby it contains at least 90% by weight % C4A3$ in crystalline or amorphous form or as a mixture of crystalline and has amorphous parts. 1. Method for manufacturing a calcium sulfoaluminate cement having at least 90% by weight C4A3$ in crystalline or amorphous form or as a mixture of crystalline and amorphous parts and a specific grinding fineness according to Blaine between 3500 cm2/g and 6250 cm2/g , wherein for manufacturing the calcium sulfoaluminate cement a mixture of raw materials is used , which contains{'sub': 2', '3, 'between 41 and 50% by weight AlO,'}between 34 and 41% by weight CaO and{'sub': '3', 'between 11 and 19% by weight SO,'}as well as{'sub': '2', 'between 0.1 and 3% by weight SiOand/or'}{'sub': 2', '3, 'between 0.1 and 1% by weight FeOand/or'}{'sub': '2', 'between 0.05 and 2.5% by weight TiOand/or'}between 0.05 and 2.5% by weight ZnO,the method comprising the steps:{'sup': 2', '2, 'pulverizing the raw materials to a mixture with a specific grinding fineness according to Blaine between 3500 cm/g and 6000 cm/g and'}calcining the mixture at a calcining temperature of at least 1150° C.2. Method as claimed in claim 1 , characterized in that the pulverizing is performed in a ball mill preferably in two steps claim 1 , wherein in both steps different grinding bodies are used in the ball mill.3. Calcium sulfoaluminate cement claim 1 , characterized in that it contains at least 90% by weight C4A3$ in crystalline or amorphous form or as a mixture of crystalline and amorphous parts as well asat most 0.5% by weight free lime, calculated as CaO, and/or{'sub': '3', 'at most 0.5% by weight CA and/or'}{'sub': 12', '7, 'at most 2.0% by weight Mayenit, calculated as CA, and/or'}at most 10.0% by weight Krotit, calculated as CA,and further{'sub': 4', '6', '3-x', 'x, 'between 0.5 and 10.0% by weight CAF and its mixed crystals CAFwith 1≤x≤3 and/or'}{'sub': '2', 'between 0.5% by weight and 10.0% by weight ...

COMPOSITION COMPRISING AN AMORPHOUS CALCIUM ALUMINATE AND ASSOCIATED PRODUCTION METHOD

Disclosed is a composition including an amorphous calcium aluminate with a final lime:alumina molar ratio between lower and upper limits. The amorphous calcium aluminate is a combination including at least: a first amorphous calcium aluminate with a first lime to alumina molar ratio, strictly lower than the lower limit of the predetermined range; and a second amorphous calcium aluminate with a second lime to alumina molar ratio, strictly higher than the upper limit of the predetermined range. The combination includes a first amount of the first amorphous calcium aluminate and a second amount of the second amorphous calcium aluminate, the first and second amounts being determined in such a way that the final lime to alumina molar ratio of the amorphous calcium aluminate, corresponding to the average of the first and second lime to alumina molar ratios weighted by the first and second amounts, is within the predetermined range. 113-. (canceled)14. A composition comprising an amorphous calcium aluminate with a final lime to alumina molar ratio (R) comprised within a predetermined range , which extends between a lower limit (Ri) and an upper limit (Rs) , said lower limit (Ri) being different from the upper limit (Rs) ,wherein said amorphous calcium aluminate is a combination composed of at least:a first amorphous calcium aluminate with a first lime to alumina molar ratio (R1), strictly lower than the lower limit (Ri) of said predetermined range, anda second amorphous calcium aluminate with a second lime to alumina molar ratio (R2), strictly higher than the upper limit (Rs) of said predetermined range{'sub': 'F', 'and wherein said combination comprises a first amount of the first amorphous calcium aluminate and a second amount of the second amorphous calcium aluminate, said first and second amounts being determined in such a way that the final lime to alumina molar ratio (R) of the amorphous calcium aluminate, corresponding to the average of the first and second lime to ...

DRY GROUT COMPOSITION AND CAPSULE FOR ANCHORING REINFORCING MEMBER, DOWEL OR ANCHOR ELEMENTS

A dry grout composition including a calcium aluminosulfate based hydraulic cement, a mineral filler, a thixotropic agent, and a superplasticizer agent. Also, an anchoring capsule, containing the dry grout composition, for use in anchoring reinforcing member dowel, or anchor elements in a hole of a substrate, and a method of use. 1. A cementitious anchoring capsule for use in anchoring a reinforcing member , dowel or anchor elements in a hole of a substrate , the capsule comprising:a water permeable encapsulating means wherein the encapsulating means is made of polyester; and 40% to 70% of a calcium aluminosulfate based hydraulic cement;', '40% to about 60% mineral filler which is sand;', '0.01% to about 5% of a thixotropic agent which is a cellulose-based colloidal agent; and', '0.01% to about 5% of a melamine sulfonate based superplasticizer agent,, 'a grout composition comprisingsaid amounts being based upon the total dry weight of said composition for a total of 100%, andsaid grout composition being encapsulated within said encapsulating means.2. The anchoring capsule as defined in claim 1 , wherein the cement contains less than 30% of alumina.3. The anchoring capsule as defined in claim 1 , wherein the cement contains between about 10% and about 25% of alumina.4. The anchoring capsule as defined in claim 1 , wherein the cement contains less than about 15% of alumina.5. The anchoring capsule as defined in claim 1 , wherein the grout composition contains about 1% thixotropic agent.6. The anchoring capsule as defined in claim 1 , wherein the grout composition contains less than about 0.1% thixotropic agent.7. The anchoring capsule as defined in claim 1 , wherein the grout composition contains from about 45% to about 55% mineral filler.8. The anchoring capsule as defined in claim 1 , wherein the grout composition further comprises class F flyash and/or silica fume compliant with ASTM C 1240.9. The anchoring capsule as defined in claim 1 , wherein the grout ...

PROCESS FOR PRODUCING A CEMENT CLINKER AT LOW TEMPERATURE

The invention provides a process for producing a cement clinker comprising: (i) mixing one or more starting materials providing each at least one or more of CaO, SiO, AIO, and FeO; and, optionally, SO, to form a raw meal comprising CaO, SiO, AIO, and FeO; and, optionally, SO, wherein the molar ratios among the aforementioned oxides is given by Formula I: S(CaO)(SiO)(AlO)(FeO)(SO), wherein: “a” is comprised from 0.05 to 1, “b” is comprised from 0.1 to 0.6, “c” is comprised from 0.001 to 0.25, and “d” is comprised from 0 to 0.3 and wherein at least 35% (p/p) of the starting materials of the raw meal have a critical microwaves absorbance temperature (Tc) comprised from 15 to 650° C. and a critical microwaves absorbance time (tc) comprised from 1 min to 1 h; (ii) heating the raw meal by irradiating with microwaves during 15 min to 3 h to reach a sintering temperature comprised from 300 to 950° C.; (iii) maintaining the microwave sintering temperature of step (ii) during 1 min to 3 h by further irradiating with microwaves; and (iv) cooling the clinker obtained in step (iii). 1. A process for producing a cement clinker comprising the steps of:{'sub': 2', '2', '3', '2', '3', '2', '3', '2', '3', '3, 'claim-text': {'br': None, 'sub': 1', '2', 'a', '2', '3', 'b', '2', '3', 'c', '3', 'd, '(CaO)(SiO)(AlO)(FeO)(SO)\u2003\u2003(Formula I)'}, '(i) mixing one or more starting materials providing each: at least one or more of CaO, SiO, AlO, and FeO; and, optionally, SO3; and/or at least other one or more compounds comprising the elements of these oxides, to form a raw meal comprising CaO, SiO, Al2O, and FeO; and, optionally, SO; and/or at least other one or more compounds comprising the elements of these oxides, wherein the molar ratios among the aforementioned oxides and/or other one or more compounds comprising the elements of these oxides is given by Formula Iwherein:“a” is comprised from 0.05 to 1,“b” is comprised from 0.1 to 0.6,“c” is comprised from 0.001 to 0.25, and“d” is ...

POLISHED LIGHTWEIGHT STRUCTURAL CONCRETE AND METHOD OF FORMATION

A method of forming a lightweight polished concrete and the resulting composition. Calcium sulfoaluminate (CSA) cement and specialized grout may be added to an amount of water in a mixer. The CSA cement, specialized grout, and water may be blended to a smooth consistency. Lightweight aggregates (LWA) may be added to the blended CSA cement, specialized grout, and water to form a mixture. The mixture may be poured over a fiberglass rebar, vibrated, screeded, and allowed to set. The set mixture may be smoothed with float blades. The smoothed mixture may be hardened with metal blades, such that the hardened mixture becomes reflective. A concrete densifier may be applied to the hardened mixture to form the lightweight polished concrete. Optionally, one or more saw cuts may be formed in the lightweight polished concrete and a coating to may be applied to fill the one or more saw cuts. 1. A method of forming a lightweight polished concrete comprising:adding calcium sulfoaluminate (CSA) cement and specialized grout to an amount of water in a mixer, wherein a ratio of the water to the CSA cement is 1 quart to every 10 lbs of CSA cement;blending the CSA cement, specialized grout, and water to a smooth consistency;adding lightweight aggregates (LWA) to the blended CSA cement, specialized grout, and water to form a mixture, wherein a ratio of the CSA cement to LWA is 60/40 by weight;pouring the mixture over a fiberglass rebar;vibrating and screeding the poured mixture;allowing the vibrated and screeded mixture to set;smoothing the set mixture with float blades;hardening the smoothed mixture with metal blades, such that an upper surface of the hardened mixture becomes reflective; andapplying a concrete densifier to the hardened mixture to form the lightweight polished concrete.2. The method of claim 1 , further comprising:forming one or more saw cuts in the lightweight polished concrete; andapplying a coating to the lightweight polished concrete to fill the one or more saw cuts. ...

LIGHTWEIGHT STRUCTUAL CONCRETE BLOCK AND METHODS OF USE

A method of forming a lightweight concrete block and the resulting structure. Calcium sulfoaluminate (CSA) cement and specialized grout maybe added to an amount of water in a mixer. The CSA cement, specialized grout, and water may be blended to a smooth consistency. Lightweight aggregates (LWA) maybe added to form a mixture. The mixture may be poured into a mold, allowed the mixture to cure, and removed from the mold to form the lightweight concrete block. The lightweight concrete block may have a first side and a second side joined by a plurality of interposing walls, the interposing walls defining one or more inner cavities and one or more outer cavities. The lightweight concrete block may have features that allow for the insertion of fiberglass rebar to aide in stacking and filling to form a wall. 1. A method of forming a lightweight concrete block comprising:adding calcium sulfoaluminate (CSA) cement and specialized grout to an amount of water in a mixer, wherein a ratio of the water to the CSA cement is 1 quart to every 10 lbs of CSA cement;blending the CSA cement, specialized grout, and water to a smooth consistency;adding lightweight aggregates (LWA) to the blended CSA cement, specialized grout and water to form a mixture, wherein a ratio of the CSA cement to LWA is 60/40 by weight; andpouring the mixture into a mold;allowing the mixture to cure; andremoving the cured mixture from the mold.2. The method of claim 1 , wherein the blending is done for approximately 3 minutes.3. The method of claim 1 , wherein the specialized grout comprises one or more of types of Portland cement claim 1 , polymers claim 1 , and expending agents.4. The method of claim 3 , wherein the specialized grout further comprises a pH reducing agent.5. The method of claim 1 , wherein the LWA comprises one or more of recycled plastics and lightweight-foamed glass aggregates (FG-LWA).6. The method of claim 1 , wherein the mold comprises:a base;one or more exterior walls;one or more outer ...

LIGHTWEIGHT STRUCTURAL CONCRETE FROM RECYCLED MATERIALS

A method of forming a lightweight concrete comprising lightweight aggregates (LWA) made from recycled materials and the resulting composition. The lightweight concrete may be formed by adding calcium sulfoaluminate (CSA) cement and a specialized grout to an amount of water in a mixer, wherein a ratio of the water to the CSA cement is 1 quart to every 10 lbs of CSA cement. The CSA cement, specialized grout, and water may be blended to a smooth consistency. LWA may be added to the blended CSA cement, specialized grout, and water, wherein a ratio of the CSA cement to LWA is 60/40 by weight. The mixture of LWA, CSA cement, specialized grout, and water may be poured over a fiberglass rebar. The mixture may be allowed to cure and before being densified with a lithium densifier. 1. A method of forming a lightweight concrete comprising:adding calcium sulfoaluminate (CSA) cement and specialized grout to an amount of water in a mixer, wherein a ratio of the water to the CSA cement is 1 quart to every 10 lbs of CSA cement;blending the CSA cement, specialized grout, and water to a smooth consistency;adding lightweight aggregates (LWA) to the blended CSA cement, specialized grout and water to form a mixture, wherein a ratio of the CSA cement to LWA is 60/40 by weight;pouring the mixture over a fiberglass rebar;allowing the mixture to cure; anddensifying the cured mixture with a lithium densifier.2. The method of claim 1 , wherein the blending is done for approximately 3 minutes.3. The method of claim 1 , wherein the fiberglass rebar comprises one or more individual rods having a diameter of approximately ¼″ to 1″.4. The method of claim 1 , wherein the fiberglass rebar comprises a three-dimensional (3D) cage.5. The method of claim 4 , wherein the individual rods of the 3D cage are spaced approximately 1″ apart.6. The method of claim 1 , wherein the LWA comprises one or more of recycled plastics and lightweight-foamed glass aggregates (FG-LWA).7. The method of claim 1 , wherein ...

Novel sulfoaluminate clinker based hydraulic binder and use thereof in a process for treating polluted soils

A hydraulic binder based on a sulfoaluminate clinker including the mineralogical phases ye'elimite C 4 A 3 $, mayenite C 12 A 7 , free lime CaO, and optionally belite C2S, characterized in that, in the clinker, the mineralogical phases are 20% to 50% by weight of ye'elimite C4A3$ phase, 5% to 80% by weight of mayenite C 12 A 7 phase, and 1% to 5% by weight of free lime CaO, the weight ratio between the mayenite C 12 A 7 and ye'elimite C 4 A 3 $ phases being between 0.1 and 10. The binder can be used to treat polluted soils, in particular soils with a leachable fraction greater than 0.4% that contains predominantly anions and/or heavy metal cations by mixing the soil with the hydraulic binder, in soil/binder weight proportions of between 1 and 40 parts of binder for 100 parts of soil. It makes it possible to stabilize soils which are polluted or to stabilize soils before dumping.

METHOD FOR PREPARING AN ETTRINGITE BINDER FOR PRODUCING CONSTRUCTION MATERIALS

A method for preparing an ettringite binder from an aluminosilicate source, a calcium sulfate source and a calcium hydroxide (or slaked lime, CH) source, the binder including a catalyst and/or an activator. Also the use of the ettringite binder produced by the method for producing cement, masonry cement, mortar, concrete, road binders and/or formulated lime. 112-. (canceled)13. An ettringite binder comprising:at least one aluminosilicate source;at least one calcium sulfate source;at least one calcium hydroxide source; andat least one activator chosen among the compounds suitable for complexing cations.14. The ettringite binder according to claim 13 , wherein the activator is chosen among sucrose claim 13 , alpha hydroxy acids or the salts thereof claim 13 , ethanolamines or the salts thereof claim 13 , and/or catechols and the derivatives thereof.15. The ettringite binder according to claim 13 , further comprising an alkali catalyst.16. The ettringite binder according to claim 15 , wherein the quantity by mass of catalyst is in a range of more than 0% to 20% with respect to the total quantity of the binder.17. The ettringite binder according to claim 13 , wherein the aluminosilicate source is a pozzolan claim 13 , a fine originating from the production of chamotte or ash of papermaking sludge.18. The ettringite binder according to claim 13 , wherein the calcium hydroxide source is slaked lime claim 13 , hydraulic lime claim 13 , quick lime claim 13 , delayed-effect quick lime claim 13 , air lime claim 13 , conventional slaked lime or any commercial lime.19. The ettringite binder according to claim 13 , wherein the calcium sulfate source is chosen among anhydrite claim 13 , natural gypsum or gypsum obtained as a by-product of industrial reactions.20. The ettringite binder according to claim 13 , further comprising additives.21. The ettringite binder according to claim 13 , wherein the aluminosilicate source is characterised by a pozzolanic activity index (IPZ) claim ...

GYPSUM COMPOSITES CONTAINING CEMENTITIOUS MATERIALS AND METHODS

Gypsum composites containing cementitious materials and methods of making the same are provided. Gypsum composites include gypsum and a cementitious material. Methods of making gypsum composites include combining gypsum stucco, water, and a cementitious material to form a slurry, and setting and drying the slurry to form a gypsum composite. 1. A method of making a gypsum composite , comprising:combining gypsum stucco, water, and a cementitious material to form a slurry; andsetting and drying the slurry to form a gypsum composite.2. The method of claim 1 , wherein the gypsum stucco comprises alpha hemihydrate gypsum claim 1 , beta hemihydrate gypsum claim 1 , or a combination thereof3. The method of claim 1 , wherein the cementitious material is selected from the group consisting of: calcium silicate cements claim 1 , calcium aluminate cements claim 1 , calcium sulfoaluminate cements claim 1 , phosphate cements claim 1 , magnesium oxychloride cements claim 1 , magnesium oxysulfate cements claim 1 , magnesium phosphate cements claim 1 , quick set cements claim 1 , and combinations thereof4. The method of claim 1 , wherein the cementitious material comprises Portland cement Type III.5. The method of claim 1 , wherein the cementitious material comprises quick lime or hydrated lime.6. The method of claim 1 , wherein combining gypsum stucco claim 1 , water claim 1 , and cementitious material comprises first combining the cementitious material and the gypsum stucco to form a dry mix and subsequently combining the dry mix with the water.7. The method of claim 6 , wherein the dry mix comprises the cementitious material in an amount from 0.1 percent to 10 percent by weight of the dry mix.8. The method of claim 6 , wherein the dry mix comprises the cementitious material in an amount from about 0.5 percent to about 3 percent by weight of the dry mix.9. The method of claim 1 , wherein the slurry comprises water in an amount from about 50 percent to about 100 percent by weight of ...

Method and additive for increasing early strength

The present invention relates to a method for accelerating the hardening of hydraulic or latent hydraulic binders, wherein ternesite and an aluminum component are added to the binder, and relates to an additive that increasing early strength for hydraulic or latent hydraulic binders that contain ternesite and a non-hydraulically reactive aluminum component, and relates to the use of an additive comprising ternesite and an aluminum component for the purpose of accelerating the hardening of hydraulic or latent hydraulic binders.

Process for Producing a Binder

The invention relates to a method of producing a binder comprising the steps of preparing () a residual material comprising amorphous alumina-rich and/or aluminium hydroxide-rich constituents, heating () the residual material to produce a fired material, the heating () of the residual material being at a temperature of >800° C. 120-. (canceled)21. A method for producing a binder comprising:Processing of a residual material comprising amorphous alumina-rich and/or aluminium hydroxide-rich components,Heating the residue to produce a fired material,whereinthe heating of the residual material takes place at a temperature of >800° C.22. The method of claim 21 ,whereinthe residual material is formed at least partially in the form of water treatment residues.23. The method according to claim 21 ,whereinthe residual material has an X-ray amorphous content of more than 80 wt. %.24. The method according to claim 21 ,whereinthe processing of the residual material comprises the removal of water, the removal of water preferably being carried out at least via a heating or a mechanical dewatering process.25. The method according to claim 21 ,whereinthe processing of the residual material comprises comminution, the residual material preferably being shredded to a particle size of less than 100 μm.26. The method according to claim 21 ,whereinthe processing of the residual material takes place in such a way that a residual content of organic material remains in the residual material as a fuel source.27. The method according to claim 21 ,whereinin addition, a source of calcium ions is added before the residual material is heated in order to produce a mixture of materials.28. The method according to claim 21 ,whereina source of sulphate ions is additionally added before the residual material is heated in order to produce a mixture of materials.29. The method according to claim 21 ,whereinthe substances1) of a residual material,2) the calcium ion source, and3) the sulfate ion source in ...

CEMENT HAVING STRESS-INDICATING PROPERTIES

A system and method measures subterranean stress. The system and method includes a cement mixture that is mixed with water to set as a solid and a stress measuring-medium having piezospectroscopic properties that directly reveals stress in situ within the cement mixture in response to a photo stimulation. The stress measuring-medium combines with the cement mixture as a dry blend before being combined with water. 1. A stress sensor that measures subterranean stress in situ comprising:a cement mixture that is mixed with water to set as a solid material; anda stress measuring-medium having piezospectroscopic properties that directly reveals stress in situ within the cement mixture in response to a photo stimulation;where the stress measuring-medium is combined with the cement mixture and water.2. The system of further comprising an expansive mineral additive combined with the stress measuring-medium.3. The system of further comprising a water-reducing admixture combined with the stress measuring-medium.4. The system of where the stress measuring-medium comprises an alpha-alumina material.5. The system of where the stress measuring-medium comprises an alpha-alumina material and a chromia material.6. The system of where the cement mixture comprises a Portland cement that forms a hydraulic seal with the alpha-alumina material.7. The system of where the where the cement mixture comprises a calcium sulfoaluminate cement added to a class H cement that forms a hydraulic seal with the alpha-alumina material.8. The system of where the alpha-alumina comprises about a fifty-five percent dry blend weight by the weight of the cement mixture.9. The system of where the system renders a spectral resolution of about 0.01 cmat about 1443 cm.10. A method for measuring subterranean stress in situ comprising:mixing a water reducing admixture with water to render a mixture;dry blending a cement mixture, an expansive mineral additive, and a stress measuring-medium in a dry blend; andmixing ...

Aluminous cements using coal fly ash

Addition of coal fly ash to calcium sulfoaluminate rapid-setting cements can lead to significant improvement and optimization of its properties. The addition of coal fly ash led to increased compressive strength and freeze-thaw durability while decreasing shrinkage and autoclave expansion. The presence of a super plasticizing agent negatively affected both compressive strength and shrinkage when used in combination with fly ash.

FREEZE-THAW DURABLE GEOPOLYMER COMPOSITIONS AND METHODS FOR MAKING SAME

A freeze-thaw durable, dimensionally stable, geopolymer composition including: cementitious reactive powder including thermally activated aluminosilicate mineral, aluminate cement preferably selected from at least one of calcium sulfoaluminate cement and calcium aluminate cement, and calcium sulfate selected from at least one of calcium sulfate dihydrate, calcium sulfate hemihydrate, and anhydrous calcium sulfate; alkali metal chemical activator; and a freeze-thaw durability component selected from at least one of air-entraining agent, defoaming agent, and surface active organic polymer; wherein the composition has an air content of about 4% to 20% by volume, more preferably about 4% to 12% by volume, and most preferably about 4% to 8% by volume. The compositions are made from a slurry wherein the water/cementitious reactive powder weight ratio is 0.14 to 0.45:1, preferably 0.16 to 0.35:1, and more preferably 0.18 to 0.25:1. Methods for making the compositions are also disclosed. 1. A freeze-thaw durable , dimensionally stable , geopolymer composition comprising a mixture of: thermally activated aluminosilicate mineral in an amount of 100 parts by weight,', 'aluminate cement in an amount of 1 to 100 parts by weight (pbw) per 100 pbw of thermally activated aluminosilicate mineral, and', 'calcium sulfate in an amount of 2 to 100 parts by weight per 100 pbw of aluminate cement, wherein the calcium sulfate is selected from at least one member of the group consisting of calcium sulfate dihydrate, calcium sulfate hemihydrate, and anhydrous calcium sulfate; and, 'cementitious reactive powder comprisingalkali metal chemical activator in an amount of 1 to 6 weight % based upon the total weight of the cementitious reactive powder, wherein the alkali metal chemical activator is selected from at least one member of the group consisting of an alkali metal salt and an alkali metal base; air-entraining agent in an amount of 0 to 1 weight % based upon the total weight of the ...

METHOD FOR THE KINETIC REGULATION OF CEMENTITIOUS BINDERS

A method for the kinetic regulation of cementitious binders and/or cementitious binder compositions, the method including the steps of providing a cementitious binder, admixing at least one borate mineral to said cementitious binder, and optionally admixing an activator selected from the group consisting of CaO, Ca(OH), and/or CaSO. 1. A method for the kinetic regulation of cementitious binders and/or cementitious binder compositions , the method comprising the steps of1) providing a cementitious binder,2) providing at least one borate mineral,3) mixing the cementitious binder and the at least one borate mineral in any given order, and{'sub': 2', '4, '4) optionally admixing an activator selected from the group consisting of CaO, Ca(OH), and/or CaSO,'}{'sup': '1/2', 'the method wherein the dosage and/or the specific surface area of every borate mineral is chosen in a way that the product P as defined by the equation P=D·(SSA),'}{'sup': '2', 'wherein D is the dosage of the respective borate mineral in w % relative to the cementitious binder and SSA is the specific surface area of the respective borate mineral in m/g,'}is from 0.01-75.2. The method according to claim 1 , wherein the cementitious binder comprises or essentially consists of at least one calcium aluminate cement and/or at least one calcium sulphoaluminate cement.3. The method according to claim 2 , wherein the cementitious binder additionally comprises at least one Ordinary Portland Cement.4. The method according to claim 3 , wherein the weight ratio of the at least one Ordinary Portland Cement to the at least one calcium aluminate cement and/or the at least one calcium sulphoaluminate cement is from 200:1-1:1000.5. The method according to claim 1 , wherein the at least one borate mineral is of natural origin.6. The method according to claim 1 , wherein the at least one borate mineral is selected from the group consisting of calcium borate claim 1 , calcium metaborate claim 1 , takedaite claim 1 , kotoite ...

DIMENSIONALLY STABLE GEOPOLYMER COMPOSITION AND METHOD

A method for making geopolymer cementitious binder compositions for cementitious products such as concrete, precast construction elements and panels, mortar and repair materials, and the like is disclosed. The geopolymer cementitious compositions of some embodiments are made by mixing a synergistic mixture of thermally activated aluminosilicate mineral, calcium aluminate cement, a calcium sulfate and a chemical activator with water 1. An aluminosilicate geopolymer cementitious composition comprising a reaction product of: about 35 to about 96% by weight a thermally activated aluminosilicate mineral;', 'about 9 to about 45% by weight a calcium aluminate cement in an amount of 1-100 parts by weight per 100 parts by weight of thermally activated aluminosilicate mineral; and', 'about 1 to about 45% by weight a calcium sulfate selected from the group consisting of calcium sulfate dihydrate, calcium sulfate hemihydrate, anhydrous calcium sulfate and mixtures thereof, the calcium sulfate in an amount of 2 to 100 parts by weight per 100 parts by weight of calcium aluminate cement; and, 'a cementitious reactive powder comprisinga chemical activator selected from the group consisting of alkali metal salt, alkali metal base, and mixtures thereof in an amount equal to about 1.0 to about 6.0% by weight based on total weight of the cementitious reactive powder; andat least one member of the group consisting of superplasticizers, air entraining agents, defoaming agents, organic rheology control agents, and film-forming polymers; andwater.2. The composition of claim 1 , wherein the cementitious reactive powder contains calcium sulfate dihydrate.3. The composition of claim 1 , wherein the chemical activator is present in an amount equal to about 1.25 to 4.00% by weight based on total weight of the cementitious reactive powder claim 1 , wherein the chemical activator is selected from at least one member of the group consisting of alkali metal citrate claim 1 , alkali metal silicate ...

Ternesite used as an activator for latent-hydraulic and pozzolanic materials

The present invention relates to binders based on latently hydraulic and/or pozzolanic materials that are activated by an addition of ternesite (C 5 S 2 $).

Mineralizer for calcium sulfoaluminate ternesite cements

The present invention relates to a method for the production calcium sulfoaluminate (belite, ferrite) ternesite clinker using fluxes/mineralizers comprising the following steps providing a raw meal comprising at least sources of CaO, SiO 2 , Al 2 O 3 , SO 3 sintering the raw meal in a kiln at >1200 to 1400° C. to provide a clinker, cooling the clinker, wherein a mineralizer comprising at least one compound containing chrome is added prior to sintering providing an amount of chrome calculated as Cr 2 O 3 of at least 500 mg/kg in the raw meal. The invention further relates to the clinker obtained, as well as to calcium sulfoaluminate (belite, ferrite) ternesite cements and binders produced from the clinker.

Hydraulic Cements, Methods and Products

Non-aqueous hydraulic cement compositions comprise a non-aqueous mixture of (a) a non-hydrated powder composition comprising calcium silicate powder or calcium aluminate powder, and (b) non-aqueous water-miscible liquid. Hardened cements are formed from such hydraulic cement compositions, and methods of producing hardened cements, kits, and articles of manufacture employ such hydraulic cement compositions. 1. A non-aqueous , hydraulic cement composition , comprising a non-aqueous mixture of (a) a non-hydrated powder composition comprising calcium silicate powder , and (b) non-aqueous water-miscible liquid.2. The hydraulic cement composition of claim 1 , wherein the powder composition comprises 20-100 weight % calcium silicate and one or more components selected from the group consisting of calcium phosphates claim 1 , calcium sulfates claim 1 , and magnesium-containing powder.3. The hydraulic cement composition of claim 2 , wherein the powder composition comprises from about 5 to about 50 weight % of a mixture of a basic calcium phosphate and an acidic calcium phosphate.4. The hydraulic cement composition of claim 2 , wherein the powder composition comprises from about 5 to about 50 weight % of a mixture of (i) β-tricalcium phosphate (β-TCP) claim 2 , and (ii) monocalcium phosphate monohydrate and/or anhydrous monocalcium phosphate.5. The hydraulic cement composition of claim 1 , wherein the powder composition comprises from about 5 to about 30 weight % of calcium sulfate powder.6. The hydraulic cement composition of claim 1 , wherein the powder composition comprises from about 0.1 to about 15 weight % of a magnesium-containing powder.7. The hydraulic cement composition of claim 1 , comprising a pH regulating agent and/or a hardening accelerator.8. The hydraulic cement composition of claim 1 , wherein the non-aqueous water-miscible liquid comprises glycerol.9. The hydraulic cement composition of claim 1 , wherein the weight to volume ratio of the powder composition ...

Dry mix for composite cement

A dry mix for a composite cement is described. The dry mix includes a calcium-containing material, an aluminum-containing material, a lithium-containing accelerant, a retarder, and a pozzolanic additive that contains a soluble sulfur salt. The pozzolanic additive preferably includes a soluble sulfur salt at a fraction greater than approximately 0.2% by weight. The pozzolanic additive may be a fly ash, and is preferably a class C fly ash. A powdered additive for use with a pre-prepared dry mix for a calcium aluminate cement is also described. The powdered additive includes a lithium-containing accelerant, a retarder, and a pozzolanic additive that contains a soluble sulfur salt.

Amphoteric polymer suspending agent for use in calcium aluminate cement compositions

A cement composition for use in a well that penetrates a subterranean formation comprises: a calcium aluminate cement or calcium magnesia cement; water; a fluid loss additive; and a suspending agent, wherein the suspending agent is a polymer and wherein the polymer: (A) is amphoteric; (B) has a molecular weight greater than 100,000; and (C) does not increase the fluid loss of the cement composition greater than 15% at a temperature of 145° F. (63° C.) and a pressure differential of 1,000 psi (7 MPa) compared to a cement composition consisting of the cement, the water, and the fluid loss additive. A method of cementing in a subterranean formation comprises: introducing the cement composition into the subterranean formation; and allowing the cement composition to set. 1. A method of cementing in a subterranean formation comprising: (A) a calcium aluminate cement or calcium magnesia cement;', '(B) water;', '(C) a fluid loss additive; and', (i) is amphoteric;', '(ii) has a molecular weight greater than 100,000; and', '(iii) does not increase the fluid loss of the cement composition greater than 15% at a temperature of 145° F. and a pressure differential of 1,000 psi compared to a test cement composition consisting of the cement, the water, and the fluid loss additive and in the same proportions as the cement composition; and, '(D) a suspending agent, wherein the suspending agent is a polymer and wherein the polymer], 'introducing a cement composition into the subterranean formation, wherein the cement composition comprisescausing or allowing the cement composition to set after the step of introducing.2. The method according to claim 1 , wherein the water is selected from the group consisting of freshwater claim 1 , brackish water claim 1 , and saltwater claim 1 , in any combination thereof in any proportion.3. The method according to claim 1 , wherein the cement composition has a density in the range of about 9 to about 22 pounds per gallon.4. The method according to ...

PROCESS FOR MANUFACTURING CALCIUM ALUMINATES

Disclosed is a method for manufacturing calcium aluminates in an industrial furnace, according to which, continuously, into a tank made of refractory material containing a molten pool that is constantly heated, fine particles are introduced of a raw material source of alumina and/or of aluminium and of a raw material source of calcium oxide and/or of calcium having a median diameter d50 less than or equal to 6,000 μm in order to melt the fine particles of raw material, and, continuously, at the outlet of the tank a mass of liquid calcium aluminates is recovered. 114-. (canceled)15. Method for manufacturing calcium aluminates in an industrial furnace , according to which:{'sub': 2', '3, 'a) continuously, fine particles of a raw material source of alumina (AlO) and/or of aluminium (Al) and of a raw material source of calcium oxide (CaO) and/or of calcium (Ca) having a median diameter d50 smaller than or equal to 6,000 μm are introduced into a tank made of refractory material containing a molten pool that is constantly heated, in order to melt said fine particles of raw material, and'}b) continuously, a mass of calcium aluminates liquid is gathered at the outlet of the tank.16. Manufacturing method according to claim 15 , according to which claim 15 , in step a) claim 15 , the molten pool is placed under a reducing atmosphere comprising carbon monoxide (CO).17. Manufacturing method according to claim 15 , according to which claim 15 , in step a) claim 15 , said reducing atmosphere comprises from 0.1% to 100% of carbon monoxide (CO) on average.18. Manufacturing method according to claim 15 , according to which the temperature of the molten pool of the calcium aluminates is comprised between 1 claim 15 ,300° C. and 1 claim 15 ,700° C.19. Manufacturing method according to claim 18 , according to which the temperature of the molten pool of the calcium aluminates is comprised between 1 claim 18 ,400° C. and 1 claim 18 ,600° C.20. Manufacturing method according to claim 15 , ...

METHOD FOR PRODUCING TERNESITE-BELITE CALCIUM SULFOALUMINATE CLINKER

The present invention relates to the production of a ternesite-belite-calcium sulfoaluminate (ferrite) clinker. The invention also relates to the use of alternative raw materials for clinker production, for example raw materials based on industrial byproducts, including those of low quality, such as lump slag and ash having a low glass content and/or a high free lime content and/or a high content of crystalline high-temperature phases, as well as naturally occurring rocks and rock glasses of comparative chemical composition. 19-. (canceled)11. The method according to claim 10 , wherein natural raw materials claim 10 , such as limestone claim 10 , bauxite claim 10 , clay/claystone claim 10 , basalt claim 10 , kimberlite claim 10 , ingnimbrite claim 10 , carbonatite claim 10 , anhydrite claim 10 , gypsum claim 10 , etc. and/or industrial byproducts claim 10 , such as waste dump and landfill materials claim 10 , ash and slag of both high and low quality claim 10 , ceramic residues claim 10 , sulfate plant muds and/or phosphogypsum claim 10 , are selected as sources for CaO claim 10 , AlO(FeO) claim 10 , SiOand SOfor the raw meal mixture.12. The method according to claim 11 , wherein bauxite claim 11 , clay and/or industrial byproducts and residual materials having an AlO(FeO) content of at least 5 wt % claim 11 , preferably of ≧10 wt % and more preferably of ≧15 wt % claim 11 , is/are selected as an AlO(FeO) source.13. The method according to claim 10 , wherein the type and amount of one or more secondary phases is controlled by the ratios by weight of CaO/AlO(FeO) claim 10 , CaO/SiOand by the proportion of the sulfate carrier in the raw meal mixture claim 10 , wherein the secondary phases claim 10 , for example calcium silicates claim 10 , sulfates claim 10 , calcium aluminates claim 10 , spinels claim 10 , representatives of the melilite group claim 10 , periclase claim 10 , free lime claim 10 , quartz and/or a glass phase claim 10 , are present in a proportion of 0. ...

OPTIMISED VERTICAL-SHAFT KILN FOR PRODUCING SULFOALUMINOUS CLINKER

The invention relates to a vertical-shaft kiln () for manufacturing a clinker, including: 1. A vertical-shaft kiln for manufacturing a clinker , comprising:a tubular enclosure comprising from top to bottom: a decarbonatation section exhibiting a lower surface slanted with respect to the vertical;', 'a clinkering section exhibiting a lower surface slanted with respect to the vertical;', 'a first collection section extending substantially vertically;, 'a feeder section extending substantially vertically, configured for receiving a raw mix;'}first extraction means arranged for extracting the clinker from the first collection section, suitable for modulating an extraction output of the clinker;first generation means arranged for generating a first gas exhibiting a temperature ranging between 950° C. and 1250° C.;first supply means arranged to supply the first gas in the decarbonatation section;second generation means arranged for generating a second oxidizing gas exhibiting a temperature ranging between 1250° C. and 1450° C.;second supply means arranged to supply the second oxidizing gas in the clinkering section; andfirst suction means arranged for suctioning the first and second gas from the feeder section.2. The kiln according to claim 1 , wherein the lower surface of the clinkering section is oriented transversally to the lower surface of the carbonatation section.3. The kiln according to claim 1 , wherein lower faces of the decarbonatation and clinkering sections are slanted in a same direction.4. The kiln according to claim 3 , wherein the lower faces of the decarbonatation and clinkering sections have a same inclination.5. The kiln according to claim 3 , wherein a downward setback is provided between a lower end of the lower surface of the decarbonatation section and an upper end of the lower surface of the clinkering section.6. The kiln according to claim 1 , wherein the decarbonatation section and the clinkering section exhibit rectangular transversal sections; ...

FLUXES/MINERALIZERS FOR CALCIUM SULFOALUMINATE CEMENTS

The present invention relates to a method for the production calcium sulfoaluminate (belite, ferrite, ternesite) clinker using fluxes/mineralizers comprising the following steps —providing a raw meal comprising at least sources of CaO, AIO, SO—sintering the raw meal in a kiln at 1100 to 1350° C. to provide a clinker, —cooling the clinker, wherein at least one compound containing copper and a glass powder or a glass powder are added prior to sintering. The invention further relates to the clinker obtained, as well as to calcium sulfoaluminate based cements and binders produced from the clinker. 2. The method according to claim 1 , wherein the raw meal comprises the following amounts of the components:CaO: 35 to 65% by weight, preferably 40 to 50% by weight, most preferred from 45 to 55% by weight;{'sub': 2', '3, 'AlO: 7 to 45% by weight, preferably 10 to 35% by weight, most preferred from 15 to 25% by weight;'}{'sub': '3', 'SO: 5 to 25% by weight, preferably 7 to 20% by weight, most preferred from 8 to 15% by weight;'}{'sub': '2', 'SiO: 0 to 28% by weight, preferably 5 to 25% by weight, most preferred from 15 to 20% by weight; and'}{'sub': 2', '3, 'FeO: 0 to 30% by weight, preferably 3 to 20% by weight, most preferred from 5 to 15% by weight.'}3. The method according to claim 1 , wherein the sintering temperature ranges from 1200 to 1300° C.4. The method according to claim 1 , wherein the flux(es)/mineralizer(s) is(are) added to raw materials used to provide the raw meal claim 1 , or is(are) added as powder or silt to the raw meal before feeding and/or during feeding at the kiln inlet or is(are) added to the kiln claim 1 , preferably through the burner claim 1 , before or at the sintering zone.5. The method according to claim 1 , wherein at least one compound containing copper claim 1 , which is selected from the group consisting of Cu claim 1 , CuO claim 1 , CuO claim 1 , CuS claim 1 , CuS claim 1 , CuSO claim 1 , CuCO claim 1 , CuCO.Cu(OH)and Cu(OH)and industrial ...

CALCIUM SULFOALUMINATE COMPOSITE BINDERS

The present invention relates to composite binders containing calcium sulfoaluminate cement and supplementary cementitious material, wherein a weight ratio of calcium sulfate to the sum of ye'elimite, aluminates and ferrites (R) ranges from 0.5 to 0.85, to a method of manufacturing them comprising the steps: a) providing at least one calcium sulfoaluminate cement b) providing at least one supplementary cementitious material c) mixing 10 to 90% by weight calcium sulfoaluminate cement(s) with 10 to 90% by weight supplementary cementitious material(s), and to their use for making hydraulically setting building materials and special construction chemical compositions. 1. Composite binder containing at least one calcium sulfoaluminate cement and at least one supplementary cementitious material , wherein a weight ratio of calcium sulfate to the sum of ye'elimite , aluminates and ferrites in the composite binder ranges from 0.5 to 0.85.2. Composite binder according to claim 1 , wherein the supplementary cementitious material is chosen from latent hydraulic materials and/or natural or artificial pozzolanic materials.3. Composite binder according to claim 1 , wherein the weight ratio of calcium sulfate to the sum of ye'elimite claim 1 , aluminates and ferrites ranges from 0.6 to 0.85.4. Composite binder according to claim 1 , wherein the calcium sulfoaluminate cement comprises 10-100% by weight CAF$ claim 1 , with x ranging from 0 to 2 claim 1 , 0-70% by weight CS claim 1 , 0-30% by weight aluminates claim 1 , 0-30% by weight ferrites claim 1 , 0-30% by weight ternesite claim 1 , 0-20% by weight calcium sulfate and up to 20% minor phases claim 1 , wherein the sum of all phases adds up to 100% claim 1 , with the proviso claim 1 , that calcium sulfate is provided as separate component and/or comprised in the supplementary cementitious material when it is not contained in the calcium sulfoaluminate cement.5. Composite binder according to claim 1 , claim 1 , wherein the content ...

Method for grinding cement clinker

Method of grinding cement clinkers comprising at least two kinds of clinker phases with differing grindability.

LONG-WORKABILITY CALCIUM ALUMINATE CEMENT WITH HARDENING PROMOTED BY A TEMPERATURE INCREASE, AND RELATED USE

Disclosed is to a calcium aluminate cement, including a calcium aluminate with a first crystallised mineralogical phase of calcium dialuminate CA2 including one calcium oxide CaO for two aluminium oxides AlOand/or a second crystallised mineralogical phase of dicalcium alumina silicate C2AS including two calcium oxides CaO for one aluminium oxide AlOand one silicon dioxide SiO. The mass fraction of all of the first and second mineralogical phases in the calcium aluminate is greater than or equal to 80%. 111-. (canceled)12. Calcium aluminate cement , comprising a calcium aluminate with a first crystallised mineralogical phase of calcium dialuminate CA2 comprising one calcium oxide CaO for two aluminium oxides AlOand/or a second crystallised mineralogical phase of dicalcium alumina silicate C2AS comprising two calcium oxides CaO for one aluminium oxide AlOand one silicon dioxide SiO ,wherein the mass fraction of all of said first and second mineralogical phases in said calcium aluminate is greater than or equal to 80%.13. The calcium aluminate cement according to claim 12 , wherein said calcium aluminate also comprises an amorphous portion claim 12 , of which the mass fraction in said calcium aluminate is less than or equal to 20%.14. The calcium aluminate cement according to claim 12 , wherein said calcium aluminate further comprises a third crystallised mineralogical phase of monocalcium aluminate CA comprising one calcium oxide CaO for one aluminium oxide AlOand/or a fourth crystallised mineralogical phase of hexa-calcium aluminate CA6 comprising one calcium oxide CaO for six aluminium oxides AlO claim 12 , the mass fraction of all of the third and fourth mineralogical phases in said calcium aluminate being less than or equal to 20%.15. The calcium aluminate cement according to claim 12 , wherein said calcium aluminate further comprises an additional mineralogical phase of sulfocalcium aluminate C4A3$ comprising four calcium oxides CaO for three aluminium oxides ...

Composite mineralizers/fluxes for the production of alite/calcium sulfoaluminate clinkers

A cement clinker composition incorporates calcium fluoride and iron oxide to reduce firing temperatures and increase strength. High fly ash, aluminum dross, aluminum scrap, high aluminum clays and combinations thereof may also be substituted for bauxite in the cement clinker composition

MACRO DEFECT FREE CEMENT WITH IMPROVED MOISTURE RESISTANCE

A cementitious composition may include polyvinyl alcohol, high alumina cement, water, a metallic coagent, a peroxide crosslinking initiator, and an organic acid retardant. A molded article may be manufactured from the cementitious composition by preparing a hydrogel pre-polymer blend of saponified polyvinyl alcohol acetate (PVAA) with greater than or equal to approximately 85% saponified PVAA, and water, mixing the hydrogel pre-polymer blend with high alumina cement (HAC) using a high shear mixing process, mixing in a metallic coagent and a peroxide crosslinking initiator, mixing in an organic acid retardant, and hot press molding the mixture. 1. A cementitious composition , comprising: high alumina cement;', 'water;', 'a metallic coagent; and', 'a peroxide crosslinking initiator., 'polyvinyl alcohol;'}2. The cementitious composition of claim 1 , wherein proportions of ingredients of the composition by weight comprise:90-110 parts polyvinyl alcohol;150-250 parts water;1200-3000 parts high alumina cement (HAC);30-100 parts metallic coagent; and3-30 parts peroxide crosslinking agent.3. The cementitious composition of claim 1 , wherein the metallic coagent is a metal-bound reactive monomer that is reacted with peroxides.4. The cementitious composition of claim 3 , wherein the metallic coagent is selected from the group comprising: zinc diacrylate (ZDA) claim 3 , zinc monoacrylate (ZMA) claim 3 , zinc dimethacrylate (ZDMA) claim 3 , calcium diacrylate (CDA) claim 3 , aluminum triacrylate claim 3 , and magnesium diacrylate.5. The cementitious composition of claim 1 , wherein the peroxide crosslinking initiator is selected from the group comprising: dicumyl peroxide (tradename DI-CUP) claim 1 , a claim 1 ,a′-bis(tert-butylperoxy)diisopropylbenzene (tradename VUL-CUP) claim 1 , 1 claim 1 ,1-di(tert-butylperoxy)-3 claim 1 ,3 claim 1 ,5-trimethylcyclohexane (tradename LUPEROX 231) claim 1 , n-butyl-4 claim 1 ,4-di(t-butylperoxy)valerate (tradename LUPEROX 230) claim 1 , and ...

HYBRID CEMENT CLINKER AND CEMENT MADE FROM THAT CLINKER

A hybrid cement clinker incorporates specific ranges of clinker phases and falls within specific modulus values as set forth and described in this document. 1. A hybrid cement clinker , comprising:{'sub': '3', 'about 20-55 weight percent CS;'}{'sub': '2', 'about 5-25 weight percent CS;'}{'sub': 4', '3, 'o': {'@ostyle': 'single', 'S'}, 'about 10-20 weight percent CA ;'}{'sub': '4', 'about 5-50 weight percent CAF;'}about 3-7 weight percent CŚ; and{'sub': '2', 'about 0.5-1.0 weight percent CaF;'}wherein said clinker has a lime adequate degree (LAD) modulus value of between about 0.8 and 0.96, a ratio of silicates and aluminates (RSA) modulus value of between about 0.3 and 4.0, a ratio of sulfoaluminates and ferroaluminates (RSF) modulus value of between about 0.2 and 4.0, a sulfur excessive coefficient (SEC) modulus value of between about 0.4 and 2.3 and a quantity of liquid phase (QLP) modulus value of between about 0.08 and 0.12.2. The cement clinker of wherein said clinker has a lime adequate degree (LAD) modulus value of between 0.86 and 0.94 claim 1 , a ratio of silicates and aluminates (RSA) modulus value of between 0.5 and 2.5 claim 1 , a ratio of sulfoaluminates and ferroaluminates (RSF) modulus value of between 0.3 and 1.5 claim 1 , a sulfur excessive coefficient (SEC) modulus value of between 1.0 and 1.7 and a quantity of liquid phase (QLP) modulus value of between 0.09 and 0.11.3. The cement clinker of incorporating stainless steel pickling sludge.4. The cement clinker of incorporating Bayer red mud.5. The cement clinker of incorporating fluidized bed combustion spent bed material.6. The cement clinker of incorporating air cooler blast furnace slag.7. The cement clinker of incorporating iron casting slag.8. The cement clinker of incorporating carbide lime.9. The cement clinker of incorporating aluminum dross.10. The cement clinker of claim 1 , further including between 0.2 and 1.0 weight percent of TIPA.11. The cement clinker of claim 1 , wherein said ...

FIRE CORE COMPOSITIONS AND METHODS

The present invention describes an improved building material composition, useful for example as a fire door core and the improved methods of making this composition. More particularly, the building material of the present invention is prepared from hollow microspheres and an aqueous mixture of a cementitious composition containing at least one of the following: a hydraulic cement, an accelerant, or a refractory binder, which composition can be molded and shaped into a fire door core. 1. A composition useful for producing a fire door core comprising a mixture of:(a) a hollow microsphere and (i) a hydraulic cement,', '(ii) an accelerant, or', '(iii) a binder;, '(b) a cementitious composition comprising at least one of the followingwherein the composition can be molded or shaped into a fire door core.2. The composition of claim 1 , wherein the hollow microspheres are selected from the group consisting of: glass claim 1 , ceramic claim 1 , metals claim 1 , plastic claim 1 , and composites.3. The composition of claim 1 , wherein the cementitious composition includes the hydraulic cement claim 1 , and the hydraulic cement is selected from the group consisting of: refractory cement claim 1 , calcium aluminate cement claim 1 , CIMENT FONDU cement claim 1 , Portland cement claim 1 , magnesium based cement claim 1 , gypsum cement claim 1 , cements with a mixture of silicates claim 1 , oxides claim 1 , perlite claim 1 , clay claim 1 , bentonite clay claim 1 , or fire clay claim 1 , and combinations thereof.4. The composition of claim 1 , wherein the cementitious composition includes the accelerant claim 1 , and the accelerant is selected from the group consisting of: alkali metal halides claim 1 , alkali metal nitrites claim 1 , alkali metal nitrates claim 1 , alkali metal formates claim 1 , alkali metal thiocyanates claim 1 , calcium chloride claim 1 , non-calcium chloride claim 1 , calcium carbonate claim 1 , calcium hydroxide claim 1 , triethanol amine claim 1 , sodium ...

METHOD FOR TREATING POLLUTED SOIL BY A HYDRAULIC BINDER WITH MAYENITE PHASE

A method for treating polluted soils, includes mixing the soil with a hydraulic binder, wherein the hydraulic binder includes: as the only high-alumina clinker, a high-alumina clinker including more than 80 wt % of mayenite C12A7 phase or a mayenite isotope, the high-alumina clinker making up at least 70 wt % of the weight of the hydraulic binder; and 1 wt % to 30 wt %, relative to the total weight of the binder, of lime. 1. A method for treating polluted soils , comprising mixing said soil with a hydraulic binder , wherein the hydraulic binder comprises:as the sole aluminous clinker, an aluminous clinker comprising more than 80% by mass of mayenite C12A7 phase or a mayenite isotype, said aluminous clinker represents at least 70% by weight of the weight of the hydraulic binder;from 1 to 30% by weight, relative to the total weight of the binder, of lime.2. The method according to claim 1 , wherein the aluminous clinker comprises as the sole aluminate phase the mayenite C12A7 phase.3. The method according to claim 1 , wherein the lime is free lime claim 1 , slaked lime claim 1 , or a mixture of free lime and slaked lime.4. The method according to claim 1 , wherein the hydraulic binder comprises from 5 to 25% by weight claim 1 , relative to the total weight of the binder claim 1 , of quicklime or slaked lime.5. The method according to claim 1 , comprising mixing said soil with said hydraulic binder in soil/binder mass proportions comprised between 1 and 10 parts binder per 100 parts soil.6. A method to stabilize soils in situ or before storage claim 1 , comprising mixing said soil with a hydraulic binder claim 1 , wherein the hydraulic binder comprises: as the sole aluminous clinker claim 1 , an aluminous clinker comprising more than 80% by mass of mayenite C12A7 phase or a mayenite isotype claim 1 , said aluminous clinker represents at least 70% by weight of the weight of the hydraulic binder;from 1 to 30% by weight, relative to the total weight of the binder, of lime ...

SETTABLE, FORM-FILLING LOSS CIRCULATION CONTROL COMPOSITIONS COMPRISING IN SITU FOAMED CALCIUM ALUMINATE CEMENT SYSTEMS AND METHODS OF USING THEM

This document relates to settable, hydraulic, non-Portland foamed cement compositions comprising nitrogen gas-generating compositions used for loss circulation control. 1. A foamed cementitious composition , comprising:calcium aluminate comprising greater than or about 68.5% alumina and less than or about 31% calcium oxide;azodicarbonamide in an amount of about 1% to about 10% by weight of the calcium aluminate;an amine activator, wherein the weight ratio of the azo compound to the amine activator is about 5:1 to about 1:5; anda foam surfactant.2. The composition of claim 1 , wherein the amine activator is selected from among carbohydrazide and TEPA.3. The composition of claim 1 , further comprising a viscosifier. This application is a continuation of and claims the benefit of priority to U.S. patent application Ser. No. 15/879,179, filed on Jan. 24, 2018, the contents of which are hereby incorporated by reference.This document relates to settable, foamed hydraulic non-Portland cement compositions comprising a nitrogen gas-generating compound used for loss circulation control.Natural resources such as gas, oil, and water in a subterranean formation are usually produced by drilling a well bore down to a subterranean formation while circulating a drilling fluid in the wellbore. Fluids used in drilling, completion, or servicing of a wellbore can be lost to the subterranean formation while circulating the fluids in the wellbore. In particular, the fluids may enter the subterranean formation via depleted zones, zones of relatively low pressure, lost circulation zones having naturally occurring fractures, weak zones having fracture gradients exceeded by the hydrostatic pressure of the drilling fluid, and so forth.One of the contributing factors may be lack of precise information on the dimensions of loss circulation areas, which can range from microfractures to vugular zones. Depending on the extent of fluid volume losses, loss circulation is classified as seepage loss, ...

SETTABLE, FORM-FILLING LOSS CIRCULATION CONTROL COMPOSITIONS COMPRISING IN SITU FOAMED CALCIUM ALUMINATE CEMENT SYSTEMS AND METHODS OF USING THEM

This document relates to settable, hydraulic, non-Portland foamed cement compositions comprising nitrogen gas-generating compositions used for loss circulation control. 1. A cementitious composition comprising:calcium aluminate comprising greater than or about 68.5% alumina and less than or about 31% calcium oxide;a nitrogen gas-generating compound in an amount of about 1% to about 10% by weight of the calcium aluminate, the nitrogen gas-generating compound comprising an azo compound;an amine activator to accelerate generation of gas from the nitrogen gas-generating compound, the amine activator comprising an ethyleneamine, wherein a weight ratio of the azo compound to the amine activator is about 5:1 to about 1:5; anda foam surfactant.2. The composition of claim 1 , comprising a viscosifier comprising xanthan or diutan claim 1 , or a combination thereof.3. The composition of claim 1 , wherein the foam surfactant comprises an alkyl salt or cocoamidopropyl hydroxysultaine claim 1 , or a combination thereof.4. The composition of claim 1 , wherein the ethyleneamine comprises ethylenediamine (EDA) claim 1 , diethylenetriamine (DETA) claim 1 , triethylenetetramine (TETA) claim 1 , or tetraethylenepentamine (TEPA) claim 1 , or any combinations thereof.5. The composition of claim 4 , wherein the foam surfactant comprises a surfactant solution added as 1% to 10% by volume of mix water to the cementitious composition. This application is a continuation of and claims the benefit of priority to U.S. patent application Ser. No. 15/879,179, filed on Jan. 24, 2018, the contents of which are hereby incorporated by reference.This document relates to settable, foamed hydraulic non-Portland cement compositions comprising a nitrogen gas-generating compound used for loss circulation control.Natural resources such as gas, oil, and water in a subterranean formation are usually produced by drilling a well bore down to a subterranean formation while circulating a drilling fluid in the ...

METHOD OF USING FLY ASH

A sieve with a mesh opening of 75 to 20 μm is provided. A raw fly ash powder is separated into a component remaining on the sieve and a component passing through the sieve by classification using the sieve. A fine fly ash powder, which is the component passing through the sieve, is used as a cement admixture. A coarse fly ash powder, which is the component remaining on the sieve, is used for production of cement clinker. 1. A method of using fly ash , comprising:providing a sieve with a mesh opening of 75 to 20 μm;separating fly ash discharged from a thermal power plant into a component remaining on the sieve and a component passing through the sieve by classification using the sieve;using a fine fly ash powder, which is the component passing through the sieve, in admixture with cement; andusing a coarse fly ash powder, which is the component remaining on the sieve, for production of cement clinker.2. The method of using according to claim 1 , wherein the fine fly ash powder is used for production of concrete or mortar through its use as a cement admixture or a concrete admixture. This invention relates to a method of using fly ash. More specifically, the invention relates to a method of using fly ash, the method in which fly ash discharged from a thermal power plant is used in two forms, namely, a raw material for production of cement clinker, and a material for use in mixture with cement, such as a cement admixture or a concrete admixture.Cement widely used in fields such as civil engineering and construction is a mixture consisting essentially of tricalcium silicate (alite; CS), dicalcium silicate (belite; CS), calcium aluminate (aluminate; CA), calcium aluminoferrite (ferrite; CAF), and calcium sulfate (gypsum), and is a powder having the property of hardening upon mixing with water. Such cement is produced by mixing gypsum and, if required, various admixtures, with a pulverized product of clinker containing alite, belite, aluminate and ferrite, and pulverizing ...

Calcium Aluminate Cement

The present invention relates to a white calcium aluminate cement containing at least 90% by weight of monocalcium aluminate, an A/C value in the range of 1.75 to 2.0, a fineness according to Blaine in the range of 3500 to 6000 cm/g, a slope n in the range of 1.1 to 1.5 and a location parameter x′ of 8-20 μm in an RRSB particle size grid according to DIN 66145 as well as its use in formulations of the construction chemical industry and the refractory industry. 1. White calcium aluminate cement wherein it contains at least 90% by weight of monocalcium aluminate , an A/C value in the range of 1.75 to 2.0 , a fineness according to Blaine in the range of 3500 to 6000 cm/g , a slope n in the range of 1.1 to 1.5 and a location parameter x′ of 8-20 μm in an RRSB particle size grid according to DIN 66145.2. Calcium aluminate cement according to claim 1 , wherein it contains ≦3% by weight of CA claim 1 , preferably ≦2% by weight of CAand particularly preferred ≦1% by weight of CA.3. Calcium aluminate cement according to claim 1 , wherein it contains ≦7% by weight of CA claim 1 , preferred ≦6% by weight of CAand particularly preferred ≦4% by weight of CA.4. Calcium aluminate cement according to claim 1 , wherein it contains ≧92% by weight of CA claim 1 , preferably ≧95% by weight of CA.5. Calcium aluminate cement according to claim 1 , wherein its colour in the L*a*b* colour system is within the value ranges: L*=92±4 claim 1 , preferably 93±2 claim 1 , a*=−0.6 to +0.7 and b*=−0.6 to +2.5.6. Calcium aluminate cement according to claim 1 , wherein it contains ≦0.3% by weight of iron claim 1 , calculated as FeO claim 1 , preferably ≦0.2% by weight claim 1 , particularly preferred ≦0.1% by weight.7. Calcium aluminate cement according to claim 1 , wherein the slope n is in the range of 1.15 to 1.40 claim 1 , preferably in the range from 1.20 to 1.30.8. Calcium aluminate cement according to claim 1 , wherein the location parameter x′ is in the range of 10 to 18 μm claim 1 , ...

HAZING CONTROL FOR CARBONATABLE CALCIUM SILICATE-BASED CEMENTS AND CONCRETES

The invention provides novel methods and compositions that mitigate the occurrence of hazing of products made from carbonatable calcium silicate-based cements. The methods and compositions of the invention may be applied in a variety of cement and concrete components in the infrastructure, construction, pavement and landscaping industries. 1. A method for mitigating or reducing hazing on a concrete product , comprising:prior to curing cement to form a concrete product, adding to the concrete mixture an admixture comprising one or more components capable of reacting with one or more of soluble alkali, alkaline earth, sulfate or chloride ions to form a low solubility material.2. The method of claim 1 , further comprising:curing the cement to form a concrete product.3. The method of claim 1 , wherein adding to cement an admixture comprises adding a solid admixture.4. The method of claim 1 , wherein adding to cement an admixture comprises adding a liquid admixture.5. The method of claim 1 , wherein adding to cement an admixture comprises adding a solid admixture and a liquid admixture.6. The method of claim 1 , wherein the cement is a carbonatable calcium silicate-based cement.7. The method of claim 6 , wherein the carbonatable calcium silicate-based cement comprises calcium silicate and one or more discrete calcium silicate phases selected from CS (wollastonite or pseudowollastonite) claim 6 , C3S2 (rankinite) claim 6 , C2S (belite claim 6 , larnite claim 6 , bredigite) claim 6 , and an amorphous calcium silicate phase at about 30% or more by mass of the total phases.8. The method of claim 6 , wherein in the carbonatable calcium silicate-based cement elemental Ca and elemental Si are present in the composition at a molar ratio from about 0.8 to about 1.2 and metal oxides of Al claim 6 , Fe and Mg are present in the composition at about 30% or less by mass.9. The method of claim 6 , wherein the solid admixture comprises one or more selected from calcium aluminate claim ...

MONOLITHIC BODIES OF SINTERED CHEMICALLY BONDED CERAMIC (CBC) BIOMATERIAL PREPARED EX VIVO FOR IMPLANTATION, PREPARATION AND USE THEREOF

The present invention generally relates to the use of pre-formed bodies of Chemically Bonded Ceramics (CBCs) biomaterial for implantation purposes wherein the bodies are prepared ex vivo allowing process parameters to be optimized for desired long term properties of the resulting CBC biomaterial. More particularly, the pre-formed CBC material bodies of the present invention are sintered. The pre-formed body of CBC material is machined to the desired geometry and then implanted using a CBC cementation paste for fixation of the body to tissue. The invention also relates to a method of preparing pre-formed bodies of CBC biomaterial for implantation purposes, methods of preparing an implant thereof having desired geometry, and a method of implantation of the implant, as well as a kit for use in the method of implantation.

USE OF A CEMENTITIOUS COMPOSITION AS A COATING FOR DISPOSABLE FOUNDRY CORES AND RELATIVE COATED CORE

The use of a cementitious composition is described, as a coating for disposable foundry cores, said cementitious composition comprising at least one binder or hydraulic cement in a quantity ranging from 40% to 99.9% by weight with respect to the total weight of the cementitious composition; possibly one or more fillers in a quantity ranging from 0.1% to 60% by weight, with respect to the total weight of the cementitious composition, said filler preferably having a D99<100 μm; at least one rheology modifying agent selected from cellulose, derivatives of cellulose such as methylhydroxyethylcellulose, vinyl acetate/versatate copolymers, polycarboxylate ether polymer, or a mixture thereof, in a quantity ranging from 0.1% to 5% by weight with respect to the total weight of the cementitious composition. A disposable foundry core is also described, having at least one coating layer based on said cementitious composition. 1. Use of a cementitious composition as a coating for disposable foundry cores , said cementitious composition comprising:at least one binder or hydraulic cement in a quantity ranging from 40% to 99.9% by weight, with respect to the total weight of the cementitious composition;optionally, one or more fillers in a quantity ranging from 0.1% to 60% by weight, with respect to the total weight of the cementitious composition;at least one rheology modifying agent selected from cellulose, derivatives of cellulose such as methylhydroxyethylcellulose, vinyl acetate/versatate copolymers, polycarboxylate ether polymer, or a mixture thereof, in a quantity ranging from 0.1% to 5% by weight, with respect to the total weight of the cementitious composition.2. The use according to claim 1 , wherein the binder or hydraulic cement is selected from Portland cement claim 1 , sulfoaluminate cement and/or aluminous cement and/or rapid natural cement of the “ciment prompt” type claim 1 , alone or mixed with each other and/or in a mixture with common cement claim 1 , optionally ...

IN SITU REFRACTORY BINDER COMPOSITIONS

Corrosion-resistant refractory binder compositions may be formed with a calcium ion source, high-alumina refractory aluminosilicate pozzolan, and water. Any one or more of such components may individually be non-cementitious. Examples of high-alumina refractory aluminosilicate pozzolan include crushed firebrick; firebrick grog; and mixtures of silicate and any one or more of corundum, high-alumina ceramic, and bauxite; refractory mortar; fire clay; mullite; fused mullite; and combinations thereof, among others. A binder composition may be mixed with sufficient amount of water to form a slurry, which slurry may be introduced into a subterranean formation (e.g., via a wellbore penetrating the subterranean formation). A plurality of the non-cementitious components may react in the presence of water when exposed to suitable conditions so as to enable the binder composition to set. Such compositions, once set, may exhibit enhanced corrosion and/or heat resistance as compared to other binder compositions. 1. A binder composition comprising:water;a non-cementitious calcium ion source; anda non-cementitious high-alumina refractory aluminosilicate pozzolan.2. The binder composition of wherein the calcium ion source comprises a compound selected from the group consisting of: hydrated lime claim 1 , quick lime claim 1 , a calcium salt in the presence of a hydroxide ion source claim 1 , and combinations thereof.3. The binder composition of wherein the high-alumina refractory aluminosilicate pozzolan comprises mullite in an amount greater than 50% by weight of the high-alumina refractory aluminosilicate pozzolan.4. The binder composition of wherein the high-alumina refractory aluminosilicate pozzolan is substantially free of amorphous material.5. The binder composition of wherein the high-alumina refractory aluminosilicate pozzolan comprises a compound selected from the group consisting of: crushed firebrick claim 1 , firebrick grog claim 1 , a mixture of silicate and corundum ...

LONG-WORKABILITY CALCIUM ALUMINATE CEMENT WITH HARDENING PROMOTED BY A TEMPERATURE INCREASE, AND RELATED USE

Disclosed is a calcium aluminate cement, including a calcium aluminate with a first crystallised mineralogical phase of calcium dialuminate CA2 including one calcium oxide CaO for two aluminium oxides AlOand/or a second crystallised mineralogical phase of dicalcium alumina silicate C2AS including two calcium oxides CaO for one aluminium oxide AlOand one silicon dioxide SiO. The mass fraction of all of the first and second mineralogical phases in the calcium aluminate is greater than or equal to 80%. 1. A calcium aluminate cement , comprising a calcium aluminate with a first crystallised mineralogical phase of calcium dialuminate CA2 comprising one calcium oxide CaO for two aluminium oxides AlOand a second crystallised mineralogical phase of dicalcium alumina silicate C2AS comprising two calcium oxides CaO for one aluminium oxide AlOand one silicon dioxide SiO ,wherein the mass fraction of all of said first and second mineralogical phases in said calcium aluminate is greater than or equal to 80%, andwherein said calcium aluminate cement has the form of a powder that has a Blaine specific surface area measured according to standard NF-EN-196-6 ranging between 2200 square centimetres per gram and 4500 square centimetres per gram, preferably between 2900 and 3900 square centimetres per gram.2. The calcium aluminate cement according to claim 1 , wherein said calcium aluminate also comprises an amorphous portion claim 1 , of which the mass fraction in said calcium aluminate is less than or equal to 20%.3. The calcium aluminate cement according to claim 1 , wherein said calcium aluminate further comprises a third crystallised mineralogical phase of monocalcium aluminate CA comprising one calcium oxide CaO for one aluminium oxide AlOand/or a fourth crystallised mineralogical phase of hexa-calcium aluminate CA6 comprising one calcium oxide CaO for six aluminium oxides AlO claim 1 , the mass fraction of all of the third and fourth mineralogical phases in said calcium ...

RAW MATERIAL FOR PRODUCING A REFRACTORY PRODUCT, A USE OF THIS RAW MATERIAL, AND A REFRACTORY PRODUCT COMPRISING A RAW MATERIAL OF THIS KIND

The invention relates to a raw material for producing a refractory product, a use of this raw material, and a refractory product comprising a raw material of this kind. 1. A raw material for producing a refractory product , comprising the following features: [{'sub': 2', '3, 'AlO: 83 to 93 mass %,'}, 'MgO: 4 to 9 mass %,', 'CaO: 2 to 10 mass %;, '1.1 the raw material has a chemical composition according to which the following oxides are present in the following proportions1.2 the raw material has an open porosity in the range of from 30 to 60 volume %.2. The raw material according to claim 1 , which has a chemical composition according to which the oxides AlO claim 1 , MgO and CaO are present in a total proportion of at least 98 mass % in relation to the total mass of the substances of the chemical composition of the raw material.3. The raw material according to claim 1 , which has a chemical composition with a proportion of SiOless than 0.5 mass %.4. The raw material according to claim 1 , which has a chemical composition with a proportion of FeOless than 0.5 mass.5. The raw material according to claim 1 , which has a raw density in the range of from 1.60 to 2.50 g/cm.6. The raw material according to claim 1 , which has a bulk weight in the range of from 600 to 1 claim 1 ,000 g/l.7. The raw material according to claim 1 , which has a pore size distribution on the basis of which at least 90 vol. % of the pore volume of the open pores are formed by pores with a pore size less than 50 μm.8. The raw material according to claim 1 , which comprises the phase CaMgAlO.9. The raw material according to claim 1 , which comprises the phase CaMgAlO.10. The raw material according to claim 1 , which comprises the phase MgAlOin a proportion less than 8 mass %.11. A method for producing a refractory product comprising: [ [{'sub': 2', '3, 'AlO: 83 to 93 mass %,'}, 'MgO: 4 to 9 mass %, and', 'CaO: 2 to 10 mass %, and, 'a chemical composition according to which the following oxides ...

Underwater Non-Dispersible Quick-Setting and Rapid-Hardening Cement-Based Composite Material and Preparation Method and Application Thereof

The present invention belongs to the field of composite materials, particularly to an underwater non-dispersible quick-setting and rapid-hardening cement-based composite material and the preparation method and application thereof. The material consists of the following raw materials in percentage by weight: 32%-34% of silicate cement, 8.8%-9% of calcium aluminate, 5%-7% of magnesium oxide, 0.5%-2% of sulfur trioxide, 0.2%-0.3% of polycarboxylate high performance water-reducing agent, 0.3%-0.7% of flocculant, 0.05%-0.2% of setting accelerator, 0.05%-0.2% of air-entraining agent, 0.05%-0.3% of rust inhibitor, 26%-31% of fine aggregate, 13%-18% of coarse aggregate, and 8.4%-8.5% of water. The material can be used for rapid repair of cement buildings in water conservancy projects, the repair material can be quickly set and the initial strength can be guaranteed. 1. An underwater non-dispersible quick-setting and rapid-hardening cement-based composite material , consisting of the following raw materials in percentage: 32%-34% of silicate cement , 8.8%-9% of calcium aluminate , 5%-7% of magnesium oxide , 0.5%-2% of sulfur trioxide , 0.2%-0.3% of polycarboxylate high performance water-reducing agent , 0.3%-0.7% of flocculant , 0.05%-0.2% of setting accelerator , 0.05%-0.2% of air-entraining agent , 0.05%-0.3% of rust inhibitor , 26%-31% of fine aggregate , 13%-18% of coarse aggregate , and 8.4%-8.5% of water.2. The cement-based composite material of claim 1 , wherein the silicate cement is preferably an ordinary silicate 42.5R cement.3. The cement-based composite material of claim 1 , wherein the flocculant is an acrylic flocculant claim 1 , preferably UWB-II.4. The cement-based composite material of claim 1 , wherein the setting accelerator is lithium carbonate claim 1 , sodium silicate or potassium aluminate claim 1 , preferably lithium carbonate; and the air-entraining agent is calcium lignosulphonate or alkyl benzoic acid claim 1 , preferably JM2000 new type concrete ...

LOW-DENSITY HIGH-STRENGTH CONCRETE AND RELATED METHODS

A low-density, high-strength concrete composition that is both self-compacting and lightweight, with a low weight-fraction of aggregate to total dry raw materials, and a highly-homogenous distribution of a non-absorptive and closed-cell lightweight aggregate such as glass microspheres or copolymer polymer beads or a combination thereof, and the steps of providing the composition or components. Lightweight concretes formed therefrom have low density, high strength-to-weight ratios, and high R-value. The concrete has strength similar to that ordinarily found in structural lightweight concrete but at an oven-dried density as low as 40 lbs./cu.ft. The concrete, at the density ordinarily found in structural lightweight concrete, has a higher strength and, at the strength ordinarily found in structural lightweight concrete, a lower density. Such strength-to-density ratios range approximately from above 30 cu.ft/sq.in. to above 110 cu.ft/sq.in., with a 28-day compressive strength ranging from about 3400 to 8000 psi. 1. A hydraulically settable lightweight concrete composition that cures to a cured composite following addition of water , said composition comprising:one or more cementitious materials;an aggregate mix composed of individual particles that are substantially volumetrically stable and non-absorbent;said aggregate mix comprising at least a first and second lightweight aggregate;said first lightweight aggregate comprising hollow glass microspheres;said second lightweight aggregate comprising polymer beads; andsaid polymer beads being solid and having a median size of greater than about 150 μm.2. The hydraulically settable lightweight concrete composition of claim 1 , wherein said polymer is a co-polymer.3. The hydraulically settable lightweight concrete composition of claim 1 , wherein an exterior surface of at least one of said first and second lightweight aggregate is etched by a process.4. The hydraulically settable lightweight concrete composition of claim 3 , ...

RADIAL COAL ASH BASED MICRO-ARCHITECTURES AND METHOD OF SYNTHESIS

Microparticles having crystalline needle or rod-shaped structures of, for example, an ettringite mineral grown and attached radially from their surface. A method including nucleating and growing crystalline needles/rods from the surface of a particle in the presence of a solution of calcium, sulfur, and aluminum such as calcium sulfoaluminate, lime and calcium sulfate is described. One example is the radial growth of ettringite needles on the surface of fly ash particles in calcium sulfoaluminate-based cement paste and concrete. 1. A material comprising:a plurality of particles each including a substrate having a plurality of crystalline needle or rod-shaped structures of an ettringite mineral attached radially to a surface of the substrate, with the plurality of particles contained in a polymer, glass, ceramic, cement, cement paste or concrete material.2. The material of wherein the substrate comprises fly ash.3. The material of wherein the particle comprises a microparticle.4. The material of wherein the particles have a total diameter ranging from 0.1 and 100 μm.5. The material of wherein the crystalline needle or rod-shaped structures have a length ranging from 0.05-50 μm.6. The material of wherein the crystalline needle or rod-shaped structures have a diameter or width ranging from 5 to 5 claim 1 ,000 nm.7. The material of wherein the crystalline needle or rod-shaped structures comprise clusters of individual crystalline needle or rod-shaped structures of the particle.8. The material of wherein the crystalline needle or rod-shaped structures have no tapering in cross-section along their length.9. The material of wherein the crystalline needle or rod-shaped structures have a rectangular or circular cross-section.10. The material of wherein the total quantity per microsphere of crystalline needle or rod-shaped structures range from 10 to 10 claim 1 ,000.11. A hydrated cement paste comprising:a plurality of particles each including a substrate having a plurality ...

MODIFIED CEMENT TILE ADHESIVE AND GROUT

Methods of formulating, premixed cement-based tiling compositions and application of such premixed cement-based tiling compositions as an adhesive or grout. The premixed cement-based tiling compositions include a premixed cementitious formulation having a pH and an alkali activation constituent. The premixed cementitious formulation includes an aluminous or a calcium aluminate cement slurry in an amount of about 35 wt. % to 50 wt. % in combination with one or more filler or modifier materials present in an amount of about 40 wt. % to 65 wt. %. The alkali activation constituent destabilizes the premixed cementitious formulation by increasing the pH thereof to generate a reaction between the premixed cementitious formulation and the alkali activation constituent resulting in the cement-based tiling composition for use as an adhesive or a grout. The alkali composition may be sodium hydroxide supersaturated with lithium carbonate. 1. A cement-based tiling composition for use as an adhesive or grout comprising:a premixed cementitious formulation having a pH, the premixed cementitious formulation including a cement slurry in an amount of about 35 wt. % to less than 50 wt. % in combination with at least one filler material present in an amount of about 40 wt. % to about 65 wt. % based on a total weight of the formulation; andan activation constituent that destabilizes the premixed cementitious formulation by increasing the pH thereof to generate a reaction between the premixed cementitious formulation and the activation constituent resulting in the cement-based tiling composition for use as an adhesive or a grout.2. The cement-based tiling composition of wherein the premixed cementitious slurry has a neutral pH.3. The cement-based tiling composition of wherein the premixed cementitious slurry is increased to a pH at or above 11.4. The cement-based tiling composition of wherein the cement slurry is an aluminous cement slurry.5. The cement-based tiling composition of wherein ...

CURABLE HYDRAULIC BINDER-BASED CEMENT MATERIAL INTENDED TO BE USED AT LOW TEMPERATURES

Cement material, curable in the presence of water and including a hydraulic binder composition, which contains a mixture of hydraulic binders and a mixture of sulphate sources, wherein the hydraulic binder mixture includes: at least one hydraulic binder containing an alite-type mineralogical phase and at least one hydraulic binder containing an aluminate-type mineralogical phase, mainly consisting of yeelimite (C4A3$) or a mixture of yeelimite and calcium monoaluminate (CA), the mixture of sulphate sources containing at least one sulphate source with a solubility of <4 g·L-1, and at least one sulphate source with a solubility >4 g·L-1, the cement material optionally including mineral additions, fine granulates, large granulates and additives. The curable cement material is useful as a material capable of setting in cold weather, in particular a concrete, a mortar, a grout, a coating or a cement paste to be used at a temperature of −10° C. to +5° C.

MODIFIED CEMENT TILE ADHESIVE AND GROUT

Methods of formulating, premixed cement-based tiling compositions and application of such premixed cement-based tiling compositions as an adhesive or grout. The premixed cement-based tiling compositions include a premixed cementitious slurry having a pH and an alkali activation constituent. The premixed cementitious slurry includes an aluminous or a calcium aluminate cement slurry in an amount of about 35 wt. % to 50 wt. % in combination with one or more filler or modifier materials present in an amount of about 40 wt. % to 65 wt. %. The alkali activation constituent destabilizes the premixed cementitious slurry by increasing the pH thereof to generate a reaction between the premixed cementitious slurry and the alkali activation constituent resulting in the cement-based tiling composition for use as an adhesive or a grout. The alkali composition may be sodium hydroxide supersaturated with lithium carbonate. 1. A cement-based tiling composition for use as an adhesive or grout comprising:a premixed cementitious slurry having a pH; andan activation constituent that destabilizes the premixed cementitious slurry by increasing the pH thereof to generate a reaction between the premixed cementitious slurry and the activation constituent resulting in the cement-based tiling composition for use as an adhesive or a grout.2. The cement-based tiling composition of wherein the premixed cementitious slurry has a neutral pH.3. The cement-based tiling composition of wherein the premixed cementitious slurry is increased to a pH at or above 11.4. The cement-based tiling composition of wherein the activation constituent has a pH at or above 11 to increase the pH of the premixed cementitious slurry.5. The cement-based tiling composition of wherein the premixed cementitious slurry includes at least an aluminous or a calcium aluminate cement slurry in an amount of about 35 wt. % to about 50 wt. % in combination with one or more filler materials present in an amount of about 40 wt. % to ...

ALUMINOUS CEMENT

The present invention relates to an aluminous cement. 1. An aluminous cement containing at least 75 wt. % and at most 89 wt. % monocalcium aluminate , CA in crystalline or amorphous form or as a mixture of crystalline and amorphous fractions , wherein the aluminous cement contains at least 53 wt. % aluminum oxide calculated as AlOand has an A/C value based on wt. % in the range of from 1.45 to 1.85 , wherein the aluminous cement contains at most 39 wt. % calcium oxide , wherein the aluminous cement has a Blaine fineness in the range of from 3500 to 6000 cm/g , wherein the aluminous cement has a slope n in the range of from 0.7 to 1.5 , and has a position parameter x′ of 8-30 μm in an RRSB particle size grid according to DIN 66145 and a color in the L*a*b* color system in the range of values: L*<85.2. The aluminous cement according to claim 1 , wherein the aluminous cement contains at least 0.1 wt. % iron calculated as FeO.3. The aluminous cement according to claim 1 , wherein the aluminous cement contains at most 10 wt. % iron calculated as FeO.4. The aluminous cement according to claim 1 , wherein the aluminous cement contains at least 0.2 wt. % silicon dioxide calculated as SiO.5. The aluminous cement according to claim 1 , wherein the aluminous cement contains at most 4 wt. % silicon dioxide calculated as SiO.6. The aluminous cement according to claim 1 , wherein the aluminous cement contains at least 77 wt. % and at most 87 wt. % CA.7. The aluminous cement according to claim 1 , wherein the slope n is in the range of from 0.8 to 1.4.8. The aluminous cement according to claim 1 , wherein the aluminous cement has a Blaine fineness in the range of from 3700 to 5500 cm/g.9. The aluminous cement according to claim 1 , wherein the position parameter x′ is in the range of from 9 to 28.10. The aluminous cement according to claim 1 , wherein the aluminous cement contains at least 0.1 wt. % carbon.11. The aluminous cement according to claim 1 , wherein the aluminous ...

DRY GROUT COMPOSITION AND CAPSULE FOR ANCHORING REINFORCING MEMBER, DOWEL OR ANCHOR ELEMENTS

A dry grout composition including a calcium aluminosulfate based hydraulic cement, a mineral filler, a thixotropic agent, and a superplasticizer agent. Also, an anchoring capsule, containing the dry grout composition, for use in anchoring reinforcing member dowel, or anchor elements in a hole of a substrate, and a method of use. 1. A cementitious anchoring capsule for use in anchoring a reinforcing member , dowel or anchor elements in a hole of a substrate , the capsule comprising:a water permeable encapsulating means wherein the encapsulating means is made of polyester; and 40% to 70% of a calcium aluminosulfate based hydraulic cement;', '40% to about 60% mineral filler which is sand;', '0.01% to about 5% of a thixotropic agent which is a cellulose-based colloidal agent; and', '0.01% to about 5% of a melamine sulfonate based superplasticizer agent,, 'a grout composition comprisingsaid amounts being based upon the total dry weight of said composition for a total of 100%, andsaid grout composition being encapsulated within said encapsulating means.2. The anchoring capsule as defined in claim 1 , wherein the cement contains less than 30% of alumina.3. The anchoring capsule as defined in claim 1 , wherein the cement contains between about 10% and about 25% of alumina.4. The anchoring capsule as defined in claim 1 , wherein the cement contains less than about 15% of alumina.5. The anchoring capsule as defined in claim 1 , wherein the grout composition contains about 1% thixotropic agent.6. The anchoring capsule as defined in claim 1 , wherein the grout composition contains less than about 0.1% thixotropic agent.7. The anchoring capsule as defined in claim 1 , wherein the grout composition contains from about 45% to about 55% mineral filler.8. The anchoring capsule as defined in claim 1 , wherein the grout composition further comprises class F flyash and/or silica fume compliant with ASTM C 1240.9. The anchoring capsule as defined in claim 1 , wherein the grout ...

PROCESS FOR PREPARING A MOF SHAPED WITH A HYDRAULIC BINDER BY LIQUID-FREE PELLETING OR BY GRANULATION, HAVING IMPROVED MECHANICAL PROPERTIES

The invention relates to a process for preparing a novel material comprising at least one crystalline organic-inorganic hybrid material (MHOIC) formed with a binding formulation comprising at least one hydraulic binder, said process comprising at least one step of mixing at least one powder of at least one crystalline organic-inorganic hybrid material with at least one powder of at least one hydraulic binder in the absence of solvent, followed by a step of forming, preferably by pelletizing in the absence of solvent or by granulation, the mixture obtained at the end of the mixing step. 1. Process for preparing a material comprising at least the following steps:a) a step of mixing at least one powder of at least one crystalline organic-inorganic hybrid material with at least one powder of at least one hydraulic binder in order to obtain a mixture, the said mixing step being carried out in the absence of solvent;b) a step of shaping the mixture obtained at the end of the step a).2. Preparation process according to claim 1 , in which the said crystalline organic-inorganic hybrid material is preferably selected from MOF claim 1 , ZIFs claim 1 , MILs and IRMOFs claim 1 , individually or as a mixture.3. Preparation process according to claim 1 , in which the said hydraulic binder is selected from Portland cement claim 1 , aluminous cements claim 1 , sulfo-aluminous cements claim 1 , plaster claim 1 , cement containing phosphate bonds claim 1 , blast furnace slag cements and mineral phases selected from alite (CaSiO) claim 1 , belite (CaSiO) claim 1 , alumino-ferrite (or brownmillerite: semi-formula Ca(Al claim 1 ,Fe)O) claim 1 , tricalcium aluminate (CaAlO) claim 1 , calcium aluminates such as monocalcium aluminate (CaAlO) claim 1 , calcium hexaluminate (CaAlO) claim 1 , used individually or as a mixture.4. Preparation process according to claim 3 , in which the hydraulic binder is selected from Portland cement and aluminous cements.5. Preparation process according to ...

QUICK-SETTING CONCRETE MIXTURE AND METHOD OF MANUFACTURE

A quick-setting concrete mixture that uses calcium sulfoaluminate as a binder cement. In one embodiment, the disclosed concrete mixture may be prepared using a revolutionary drum mixer truck and may recycle surplus or leftover concrete. In one embodiment, the mixture may use air entrainment; such as liquid air entrainment or foam generated air entrainment, to manufacture the concrete mixture.

BINDER FOR SELF-COMPACTING AND RE-EXCAVATABLE BACKFILL

A hydraulic binder composition intended to be used to form a self-compacting and re-excavatable backfill, said hydraulic binder composition comprising fly ash, aluminous cement, and hydrated lime, said hydraulic binder composition being intended to be mixed with a granulate composition and with water to form said self-compacting and re-excavatable backfill. 1. A hydraulic binder composition intended to be used for forming a self-compacting and re-excavatable backfill , comprising:flying ashes in a content comprised between 65% by weight and 95% by weight, preferably between 70% by weight and 90% by weight, advantageously between 75% by weight and 85% by weight, based on the total weight of the hydraulic binder composition; andaluminous cement in a content comprised between 5% by weight and 35% by weight, preferably between 15% and 20% by weight, on the basis of the total weight of the hydraulic binder composition;hydrated lime in a content comprised between 0.05% by weight and 15%, preferably between 0.5% by weight and 6% by weight, advantageously between 1% by weight and 5% by weight, on the basis of the total weight of the hydraulic binder composition,said hydraulic binder composition being intended to be mixed with a granulate composition and with water in order to form said self-compacting and re-excavatable backfill.2. The hydraulic binder composition according to claim 1 , wherein said flying ashes have a grain size curve characterized by a dcomprised between 0.04 mm and 0.125 mm.3. The hydraulic binder composition according to claim 1 , wherein said flying ashes have a volume density of 2.31×10kg/m±0.20×10kg/m.4. The hydraulic binder composition according to claim 1 , characterized in that it comprises at least one superplasticizer preferably selected from the group of polycarboxylic derivatives claim 1 , advantageously derivatives of polycarboxylic ether claim 1 , said superplasticizer being present in a content comprised between 2.7×10% by weight and 3.4×10 ...

PROCESS FOR THE PREPARATION OF HIGH ALUMINA CEMENT

High alumina cement is produced in a submerged combustion melter, cooled and ground. 1. Process for the preparation of high alumina cement comprising:introducing a solid batch material for preparation of high alumina cement into a melter;melting the solid batch material in the melter by submerged combustion to form a liquid melt;withdrawing at least a portion of the liquid melt from the melter;cooling said discharged liquid melt to obtain solidified melt; andgrinding the solidified melt to appropriate grain size.2. The process of claim 1 , wherein the melting chamber walls are cooled comprising double steel walls separated by circulating cooling liquid claim 1 , and are not covered by a refractory lining.3. The process of claim 1 , wherein heat is recovered from the hot fumes and/or from the cooling liquid.4. The process of wherein heat is recovered from the hot fumes to preheat the raw materials.5. The process of wherein part at least of the melt is withdrawn continuously or batchwise from the melter.6. The process of wherein the submerged burners of the melter are controlled such that the melt volume is increased by at least 8% compared to the volume the melt would have with no burners firing.7. The process of wherein the submerged combustion is performed such that a substantially toroidal melt flow pattern is generated in the melt claim 1 , having a substantially vertical central axis of revolution claim 1 , comprising major centrally inwardly convergent flows at the melt surface; the melt moves downwardly at proximity of the vertical central axis of revolution and is recirculated in an ascending movement back to the melt surface claim 1 , thus defining a substantially toroidal flow pattern.8. The process of wherein the melting step comprises melting the solid batch material claim 1 , in a submerged combustion melter by subjecting the melt to a flow pattern which when simulated by computational fluid dynamic analysis shows a substantially toroidal melt flow ...

CEMENT COMPOSITIONS BASED ON AMORPHOUS BAGASSE ASH

A cement composition including a dry phase and a liquid phase. The dry phase includes an aluminosilicate source, including amorphous bagasse ash with a concentration between 40 wt. % and 100 wt. % of the weight of the dry phase. The liquid phase includes at least one of water and an alkaline activator solution. The alkaline activator solution includes at least one of an alkali metal stearate, an alkali metal silicate, and an alkali metal hydroxide. 1. A cement composition , comprising:a dry phase comprising an aluminosilicate source, the aluminosilicate source comprising amorphous bagasse ash with a concentration between 40 wt. % and 100 wt. % of weight of the dry phase; anda liquid phase comprising at least one of water and an alkaline activator solution, the alkaline activator solution comprising at least one of an alkali metal stearate, an alkali metal silicate, and an alkali metal hydroxide.2. The cement composition of claim 1 , wherein the liquid phase comprises of the alkaline activator solution and the alkali metal stearate comprises at least one of sodium stearate claim 1 , potassium stearate claim 1 , and calcium stearate with a concentration of the stearate between 5 wt. % and 40 wt. % of weight of the dry phase.3. The cement composition of claim 1 , wherein the liquid phase comprises of the alkaline activator solution and the alkali metal hydroxide comprises at least one of sodium hydroxide claim 1 , potassium hydroxide claim 1 , calcium hydroxide claim 1 , barium hydroxide claim 1 , aluminum hydroxide claim 1 , lithium hydroxide claim 1 , cesium hydroxide claim 1 , and magnesium hydroxide with a concentration of the alkali metal hydroxide between 5 wt. % and 40 wt. % of weight of the dry phase.4. The cement composition of claim 1 , wherein the liquid phase comprises of the alkaline activator solution and the alkaline activator solution comprises the alkali metal stearate and the alkali metal hydroxide with a weight ratio of the alkali metal stearate to ...

Dental material

A white, substantially non-iron containing dental material formed from Portland cement. The material may be a dental cement, dental restorative or the like.

一种利用垃圾焚烧飞灰制备快硬型水泥基胶粘剂的方法

本发明涉及一种利用垃圾焚烧飞灰制备快硬型水泥基胶粘剂的方法，该方法包括以下步骤：(1)硫铝酸盐水泥的煅烧：将硫铝酸盐生料在电炉中以20～30℃/min的升温速度至1200～1250℃，然后保温1～2h制成硫铝酸盐熟料，将硫铝酸盐熟料与无水石膏混合得到硫铝酸盐水泥；(2)快硬型水泥基胶粘剂的制备：将硫铝酸盐水泥、石英砂、粉煤灰，羟丙基甲基纤维素醚，可再分散胶粉，纤维进行拌合即得快硬型水泥基胶粘剂。与现有技术相比，本发明在保证产品性能的同时，能够减轻了飞灰、脱硫石膏等由于未被利用对环境造成的严重负担以及处理费用。

High-performance flowing cement mortar composition and surface protection method of concrete structures using the composite

The present invention relates to a cement mortar composition comprising 10 to 60 wt% of rapidly-hardening binder, 10 to 60 wt% of fine aggregate, 0.01 to 30 wt% of polymer admixture and 0.1 to 30 wt% of water, wherein the polymer admixture comprises 75 to 99 wt% of methyl methacrylate-styrene, 0.1 to 10 wt% of methyl methacrylate-butadiene, 0.1 to 10 wt% of butylacrylate-styrene, 0.1 to 10 wt% of acrylonitrile and 0.01 to 5 wt% of vinyl acetate; and a surface protection method of a concrete structure. According to the present invention, the service period of a concrete structure can be increased, operation and maintenance costs thereof can be reduced, and constructability thereof can be improved as construction is facilitated by excellent strength, durability, and flowability, construction period is reduced by rapidly hardening, construction costs can be reduced, repairing period can be reduced, and field applicability, workability, pavement waterproofing layer protection, chloride penetration resistance, durability and adhesion and water resistance are excellent.

急硬性促進材

(57)【要約】 【課題】 急硬性促進材添加直後のセメントペーストの 瞬結（こわばり）を抑制して、脈動等による吹き付けム ラの発生を防止しながら、その後の自重による剥落を生 じさせずにセメントペーストを速やかに硬化させること ができるとともに、長期強度の増進を確保し、さらに環 境的にも優れたセメント用急硬性促進材の提供。 【解決手段】 １４００℃未満で焼成され、ＣａＯが５ ３〜７０重量％、Ｎａ 2 Ｏが５〜２０重量％、Ａｌ 2 Ｏ 3 が２０〜４０重量％である化学組成を有し、８ＣａＯ・ Ｎａ 2 Ｏ・３Ａｌ 2 Ｏ 3 を５０重量％以上含有するＮａ 2 Ｏ −ＣａＯ−Ａｌ 2 Ｏ 3 系組成物を１〜２０重量％、及び硫 酸アルミニウムを８０〜９９重量％含有するセメント用 急硬性促進材。

Durability-improved ultra-quick-hardening cement concrete composition and repairing method for road pavement therewith

The present invention relates to an ultra-rapid hardening cement concrete composition with improved durability, and a pavement maintenance and repair method using the same. According to the present invention, the ultra-rapid hardening cement concrete composition comprises: 5 to 45 weight percent of an ultra-rapid hardening coupling agent; 15 to 75 weight percent of fine aggregates; 15 to 70 weight percent of coarse aggregates; 1 to 25 weight percent of a performance modifier; and 4 to 30 weight percent of water. The ultra-rapid hardening agent comprises: 5 to 79 weight percent of earl-strength Portland cement; 10 to 50 weight percent of calcium or magnesium sulfonate aluminate; 2 to 35 weight percent of blast furnace slag powder with a particle size of 3,000 to 9,000 cm^2/g; 1 to 30 weight percent of tricalcium aluminate; 1 to 30 weight percent of peat or turf; 1 to 20 weight percent of gypsum; 1 to 10 weight percent of kaolin; 1 to 10 weight percent of nitric kalmite; 1 to 10 weight percent of lithium carbonate; 1 to 10 weight percent of clinoptilolite; 0.5 to 5 weight percent of a deforming agent; and 0.5 to 5 weight percent of a water reducing agent. According to the present invention, the ultra-rapid hardening cement concrete composition promotes the densification of an inner tissue to form dense concrete, thereby providing an effect of improving strength and durability, in particular, waterproofness and corrosion of the concrete. Moreover, wear resistance is excellent to improve scaling resistance, thereby providing an effect of preventing deterioration of a surface of pavement. Moreover, provided are effects of preventing surface crack and expansion breakage caused by drying shrinkage, and providing a self-crack curing effect, which absorbs water and discharges the water again to fill a crack while existing inside the cured concrete in a reduced volume state.

Application of aluminium oxide and silicon oxide-containing compounds for manufacturing hydrophobic construction product

FIELD: chemistry. SUBSTANCE: invention relates to application of binding systems for manufacturing hydrophobic construction material, which contain compounds, which include aluminium oxide and silicon oxide, for manufacturing hydrophobic construction product, characterised by the fact that the sum of oxides, calculated in form Al 2 O 3 and SiO 2 , in binding system constitutes ≥40 wt %, based on water-free binding system, and contact angle of oil drop, placed on the surface of aged construction product, constitutes ≥90°, where it is offered to realise contact angle determination under water. The invention is developed in dependent items of the invention formula. EFFECT: obtaining hydrophilic construction products, providing possibility of their easy cleaning. 16 cl, 3 dwg, 11 tbl, 4 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 577 344 C2 (51) МПК C04B 28/00 (2006.01) C04B 28/08 (2006.01) C04B 28/22 (2006.01) C04B 111/27 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2013116738/03, 11.08.2011 (24) Дата начала отсчета срока действия патента: 11.08.2011 Приоритет(ы): (30) Конвенционный приоритет: (43) Дата публикации заявки: 20.10.2014 Бюл. № 29 (45) Опубликовано: 20.03.2016 Бюл. № 8 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 15.04.2013 2 5 7 7 3 4 4 (56) Список документов, цитированных в отчете о поиске: JP 2007162355A, 28.06.2007. RU 2266266 C2, 20.12.2005. RU 2376252 C2, 20.12.2009. WO 2010/042838 A1, 15.04.2010. GB 1208954 A1, 14.10.1970. (73) Патентообладатель(и): КОНСТРАКШН РИСЁРЧ ЭНД ТЕКНОЛОДЖИ ГМБХ (DE) R U 13.09.2010 EP 10176340.7 (72) Автор(ы): ГЕРИГ Уве (DE), ЭЛЛЕНРИДЕР Флориан (DE), МЕЛЬХАРТ Михаэль (DE), РИДМИЛЛЕР Йоахим (DE), ВАХЕ Штеффен (DE), ДЕГЕНКОЛЬБ Матиас (DE), КУЧЕРА Михаэль (DE), ФОЛАНД Катя (DE) (86) Заявка PCT: 2 5 7 7 3 4 4 R U C 2 C 2 IB 2011/053580 (11.08.2011) (87) Публикация заявки PCT: WO 2012/035455 (22.03.2012) Адрес для переписки: 105082, Москва, ...

내마모성 및 균열저항성이 우수한 조강 개질 시멘트 콘크리트 조성물 및 이를 이용한 도로 포장 보수·보강 공법

본 발명은 내마모성 및 균열저항성이 우수한 조강 개질 시멘트 콘크리트 조성물 및 이를 이용한 도로포장 보수·보강 공법에 관한 것으로, 조강형 결합재 1∼45중량%, 잔골재 5∼80중량%, 굵은골재 5∼80중량%, 기능개선 혼화제 0.01∼30중량% 및 물 1∼40중량%를 포함한다. 상기 조강형 결합재는 보통 포틀랜드 시멘트 20~90중량%, 칼슘 또는 마그네슘설포알루미네이트 3~45중량%, 트리칼슘알루미네이트 시멘트 1~30중량%, 이산화규소 1~30중량%, 석고 1~20중량%, 하이드록시탄산마그네슘 0.1~20중량%, 알루민산스트론듐 0.01~15중량% 및 알루미노실리케이트 0.01~15중량%를 포함하고, 상기 기능개선 혼화제는 메틸메타크릴레이트-스티렌 공중합체 30∼99중량%, 폴리에틸렌옥사이드 0.1∼30중량%, 메틸아크릴레이트-비닐아세테이트 공중합체 0.1∼25중량%, 부타디엔고무 0.1∼25중량%, 플루오린실란 0.1∼25중량%, 폴리칼본산계 감수제 0.01~10중량% 및 실리콘계 소포제 0.01~10중량%를 포함하는 것을 특징으로 하는 것이다. 본 발명에 의하면, 포졸란 반응에 의하여 시멘트의 초기 수화 및 조직의 치밀화를 촉진하여 밀실한 콘크리트를 만들 수 있어 콘크리트의 내마모성 및 부착강도를 개선하며, 특히 팽창재와 수축저감제를 사용함으로써 건조수축에 의한 표면균열 및 팽창파괴현상을 방지하는 효과를 얻었고 내구성을 크게 향상시킬 수 있다.

Matrix for the continuous fiber reinforced cement composites using ultra-super fine cement

본 발명은 초미립자의 시멘트를 사용하여 연속섬유보강시멘트 복합소재(재료)를 제조할 때 연속섬유를 견고히 접착 또는 부착하기 위해 사용되는 시멘트 매트릭스 제조에 관한 것으로, 더욱 상세하게는 연속섬유의 견고한 접착을 위하여 분말도(blaine)가 10,000 이상 20,000 ㎠/g이하의 초미립자상의 시멘트계와 실리카흄, 석회석 미분말, 슬래그미분말, 플라이애시 등 미립분의 무기계 첨가재, 무기게 팽창재 및 유기계 혼화제류를 조합한 조성물로 이루어진 초미립자계의 시멘트 복합매트릭스의 제조방법에 관한 발명이다. The present invention relates to the production of a cement matrix used to firmly adhere or adhere to continuous fibers when manufacturing a continuous fiber reinforced cement composite material (material) using cement of ultra-fine particles, and more particularly, to provide a firm adhesion of continuous fibers. Ultra fine particles made of a combination of ultrafine cement-based cements with a fineness of 10,000 or more and 20,000 cm 2 / g or less and fine particles such as silica fume, limestone powder, slag powder and fly ash, inorganic additives, inorganic crab expanders and organic admixtures. The present invention relates to a method for producing a cement composite matrix of a system. 이들 복합체의 조성물 중 시멘트 및 무기계 첨가재 입자의 분말도별로 복합체를 성형, 제조하여 분말도의 영향이 섬유보강 복합체의 계면구조에 미치는 영향을 조사하고 시멘트 복합 매트릭스로서의 한계분말도 즉, 분말도(blaine)가 10,000 이상 20,000 ㎠/g 이하의 초미립자상의 시멘트와 무기계 미분말을 사용함으로서, 고인성,고강도 시멘트계 복합매트릭스를 제조하는 방법을 발명하였다. In the composition of these composites, the composites were formed and manufactured according to the powder levels of the particles of cement and inorganic additives, and the effects of the powders on the interfacial structure of the fiber reinforced composites were investigated. By using ultra fine cement and inorganic fine powder of 10,000 or more and 20,000 cm 2 / g or less), a method for producing a high toughness, high strength cement-based composite matrix was invented. 또한 시멘트복합체에 인성 등을 보강하기 위해서 사용되는 유리섬유가 시멘트콘크리트중의 강알카리성으로 인해 유리가 침식, 부식되어 그효과가 점차 감소하는 단점이 있다. 이러한 단점을 보강하기 위해서 내알카리 섬유를 첨가 사용하여야 하나 비용이 고가이고 이 내알카리 섬유도 장기간 콘크리트중에서 서서히 침식되는 것을 알 수 있다. In addition, the glass fiber used to reinforce toughness in the cement composite has a disadvantage that the glass is eroded and ...

To High durability high early strength mix cement Composition

The present invention relates to a high early strength mixed cement composition with high durability. The high early strength mixed cement composition with high durability according to the embodiment of the present invention is used with a minimum curing condition in a winter construction with low temperatures or a concrete construction of an emergency construction. An optimum early strength is implemented and concrete workability and field construction are improved.

Напр гающий цемент

Используетс  в промышленности строительных материалов. Сущность: напр гающий цемент содержит, мае. %: высокоосновные силикаты кальци  64-73, сульфоалюминат кальци  16-19, алюмоферрит кальци  4-6, оксид магни  3-5, сульфохромит кальци  4- 6. Цемент готов т обжигом при 1200&amp;deg;С смеси известн ка, алунитовой руды и бо  хромомагнезитового кирпича. Прочность при сжатии цемента 122,8 МПа, самонапр жение через 28 суток 6,6 МПа. 3 табл.