Composition, used in concrete, comprises Portland clinker and belite-calcium-sulfoaluminate-ferrite clinker comprising calcium aluminoferrite phase, calcium sulfoaluminate phase, belite, minor phase e.g. periclase, and element e.g. zinc

La présente invention a pour objet une composition comprenant au moins - un clinker Portland ou ciment Portland; et - un clinker Belite-Calcium-Sulphoalumineux-Ferrite (BCSAF).

MORE SULFOALUMINATKLINKER WITH HIGH ONE BELITANTEIL, PROCEDURES FOR ITS PRODUCTION AS WELL AS USE FOR THE PRODUCTION OF HYDRAULIC BONDING AGENTS

NOVEL HYDRAULIC BINDER AND HYDRAULIC COMPOSITION COMPRISING SAME

The present invention relates to a hydraulic binder which comprises: a clinker with a specific shape, the clinker comprising as main phases, given as weight percentages relative to the total weight of the clinker: (i) 70 to 95 % of a belite phase having a particle size such that the Dv50 ranges from 5 to 15 µm; (ii) 5 to 30 % of a calcium aluminoferrite phase; and (iii) less than 5 % of minor phases; the clinker having an Al2O3/Fe2O3 weight ratio of less than 1.5; and the clinker comprising less than 5 % of alite phase and less than 5 % of calcium sulphoaluminate phase; and at least 0.5 % dry weight of an activator made of calcium sulphate, as a weight percentage relative to the total weight of phases (i) to (iii).

Composition, useful as cement in concrete as an element for construction field, comprises mineral additives and belite-calcium-sulfoaluminate-ferrite clinker comprising e.g. calcium aluminoferrite phase and belite

Composition comprises (in mass%): a mineral additives (5-80); and belite-calcium-sulfoaluminate-ferrite (BCSAF) clinker (20-95) comprising at least (a) calcium aluminoferrite phase (5-30 mass%), (b) calcium sulfoaluminate phase (10-35 mass%), (c) belite (40-75 mass%), (d) one or more minor phases (0.01-10 mass%) comprising calcium sulfate, alkali sulfates, perovskite, gehlenite, free lime and periclase, and/or a glassy phase, and in which the total percentage of the phases are >= 97%. Composition comprises (in mass%): a mineral additives (5-80); and belite-calcium-sulfoaluminate-ferrite (BCSAF) clinker (20-95) comprising at least (a) calcium aluminoferrite phase of formula (C1 2A xF1 (1-x)) (5-30 mass%), (b) calcium sulfoaluminate phase of formula (C1 4A 3S2) (10-35 mass%), (c) belite (C1 2S1) (40-75 mass%), (d) one or more minor phases (0.01-10 mass%) comprising calcium sulfate, alkali sulfates, perovskite, gehlenite, free lime and periclase, and/or a glassy phase, and in which the total percentage of the phases are >= 97%. C1 : CaO; A : Al 2O 3; F1 : Fe 2O 3; S1 : SiO 2; S2 : SO 3; and x : 0.2-0.8. Independent claims are included for: (1) a cement comprising the composition and 1-40 mass% of calcium sulfate; (2) a concrete comprising the cement; and (3) a preparation of the concrete comprising mixing the cement with a granulate, water, optionally an additives, and optionally one mineral additives.

Belite sulfoaluminate binder

A hydraulic binder includes a belite sulfoaluminate clinker and silica having a BET specific surface area in nitrogen of at least 50 m2/g, the quantity of silica being lower than or equal to 5%, the percentage being expressed as a mass percentage in relation to the mass of the binder.

CEMENT DECREASE DECREASE MEANS AND PROCEDURE FOR THE PRODUCTION OF CEMENT-BASED ARTICLES WITH REDUCED DECREASE

PROCESS FOR THE TREATMENT OF A SILICATE MINERAL

The invention provides a process for the preparation of a second composition, said process comprising the steps of: -preparing a first compositioncomprising an alkali metal magnesium orthosilicate andoptionally either(i) magnesium oxide or(ii) an alkali metal silicate, byreaction, at a temperature from 500 to 1200°C, of an alkali metal carbonate compound, which compound is an alkali metal carbonate, an alkali metal bicarbonate or a mixture thereof, with a magnesium silicate, the molar ratio of alkali metal carbonate compound, expressed as alkali metal oxide of the formula R 2 O, in which R represents an alkali metal, to magnesium silicate, expressed as silicon dioxide, of the formula SiO 2, being from 4:1 to 1:4, and -contacting the first composition with water to produce thesecond composition comprising an amorphous magnesium silicate hydrate (M-S-H). It is possible to isolateor producefurther useful products from the second composition.

PROCESS FOR REMOVAL OF CARBON DIOXIDE FROM A GAS STREAM

The invention provides a process for reducing the carbon dioxide concentration of a carbon dioxide- containing gas which process comprises, in a first stage, contacting the carbon dioxide-containing gas with a treating solution comprising an alkali metal carbonate and/or hydroxide and with a catalyst to promote the absorption of carbon dioxide to form a second solution comprising an alkali metal carbonate and bicarbonate and, in a second stage, contacting the second solution with a carbonatable silicate-containing material comprising an alkaline earth cation capable of forming an insoluble carbonate to produce silica and a solid carbonate comprising the cation and to regenerate a solution comprising alkali metal carbonate.

HIGH BELITE-CONTAINING SULFOALUMINOUS CLINKER, METHOD FOR THE PRODUCTION AND THE USE THEREOF FOR PREPARING HYDRAULIC BINDERS.

The invention relates to a belite-sulfoaluminous clinker, to a method for the Production and the use thereof for preparing hydraulic binders comprising the following mineralogical composition: 5 to 35 %, preferably 10 to 20 % a calcium aluminoferrite phase whose composition corresponds to a general formula C2AXF(1-X), wherein X ranges from 0.2 to 0.8, 15 to 35 %, preferably 20 to 30 % a calcium sulphoaluminate phase "yee' limite" (C4A3$), 40 to 75 %, preferably 45 to 65 % belite (C2S), 0.1 to 10 % one or several mineral phases selected form calcium sulphates, alkali sulphates, perovskite, calcium aluminates, gehlenite, free lime, periclase and/or a vitreous phase and at least a secondary element selected from sulfur, magnesium, sodium, potassium, boron, phosphorus, zinc, manganese, titanium, fluorine, chlorine, wherein the total content of said secondary elements is equal to or less than 15 %. © KIPO & WIPO 2007 ...

PROCESS FOR REMOVAL OF CARBON DIOXIDE FROM A GAS STREAM

The invention provides a process for reducing the carbon dioxide concentration of a carbon dioxide- containing gas which process comprises, in a first stage, contacting the carbon dioxide-containing gas with a treating solution comprising an alkali metal carbonate and/or hydroxide and with a catalyst to promote the absorption of carbon dioxide to form a second solution comprising an alkali metal carbonate and bicarbonate and, in a second stage, contacting the second solution with a carbonatable silicate-containing material comprising an alkaline earth cation capable of forming an insoluble carbonate to produce silica and a solid carbonate comprising the cation and to regenerate a solution comprising alkali metal carbonate.

Additives for cement

A belite-calcium sulphoaluminate-ferrite (BCSAF) cement composition including: a BCSAF clinker which clinker has the following mineralogical composition, based on the total weight of the clinker: 5 to 25%, preferably 10 to 20%, of a calcium aluminoferrite phase having the general formula C2AxF(1X), wherein X is from 0.2 to 0.8; 15 to 35% of a calcium sulphoaluminate phase; 40 to 75% of belite (C2S); from 0.01 to 10% in total of one or more minor phases selected from calcium sulphates, alkali metal sulphates, perovskite, calcium aluminates, gehlenite, free lime and periclase and/or a vitreous phase; and an alkanolamine.

ADDITIVES FOR CEMENT

The invention provides a belite-calcium sulphoaluminate-ferrite (BCSAF) cement composition comprising: a BC-NAP clinker which clinker has the following mineralogical composition, based on the total weight of the clinker: 5 to 25%, preferably to 20%, of a calcium aluminoferrite phase having the general formula C2A x F(1-X), wherein X is from 0.2 to 0.8; 15 to 35% of a calcium sulphoaluminate phase; 40 to 75% of belite (C2S); from 0.01 to 10% in total of one or more minor phases selected from calcium sulphates, alkali metal sulphates, perovskite, calcium aluminates, gehlenite, free lime and periclase and/or a vitreous phase; and an alkanolamine.

ADDITIVES FOR A HYDRAULIC BINDER BASED ON A BELITE-CALCIUM-SULPHOALUMINATE-FERRITE CLINKER

La présente invention a pour objet une composition comprenant au moins, en % exprimé en masse par rapport à la masse totale de composition, de 0,01 à 3 % d'acide polycarboxylique ou un de ses sels ledit acide polycarboxylique comprenant de 2 à 4 groupes carboxyle par molécule; et de 97 à 99,99 % d'un clinker Belite-Calcium-Sulphoalumineux-Ferrite (clinker BCSAF).

ADDITIVES FOR A HYDRAULIC BINDER BASED ON A BELITE-CALCIUM-SULPHOALUMINATE-FERRITE CLINKER

La présente invention a pour objet une composition comprenant au moins, en % exprimé en masse par rapport à la masse totale de composition, de 0,01 à 3 % d'acide polycarboxylique ou un de ses sels ledit acide polycarboxylique comprenant de 2 à 4 groupes carboxyle par molécule; et de 97 à 99,99 % d'un clinker Belite-Calcium-Sulphoalumineux-Ferrite (clinker BCSAF).

PROCESS FOR THE MINERALIZATION OF CARBON DIOXIDE

The invention provides a process for the mineralization of carbon dioxide to form a magnesium carbonate compound, which process comprises contacting the carbon dioxide, in the free form, or in the form of an alkali metal carbonate or bicarbonate, with an alkali metal magnesium silicate to produce the magnesium carbonate compound.

Composition, useful as cement in concrete as an element for construction field, comprises Portland clinker or Portland cement and belite-calcium-sulfoaluminate-ferrite clinker e.g. calcium aluminoferrite phase

Composition (I) comprises (in wt.%): at least one Portland clinker or Portland cement (1-99); and belite-calcium-sulfoaluminate-ferrite (BCSAF) clinker (99-1) comprising at least (a) calcium aluminoferrite phase (5-30 mass%), (b) calcium sulfoaluminate phase (10-35 mass%), (c) belite (40-75 mass%), (d) one or more minor phases (0.01-10 mass%) comprising calcium sulfate, alkali sulfates, perovskite, gehlenite, free lime and periclase, and/or a glassy phase, and in which the total percentage of the phases are >= 97%. Composition (I) comprises (in wt.%): at least one Portland clinker or Portland cement (1-99); and belite-calcium-sulfoaluminate-ferrite (BCSAF) clinker (99-1) comprising at least (a) calcium aluminoferrite phase of formula (C1 2A xF1 ( 1 - x )) (5-30 mass%), (b) calcium sulfoaluminate phase of formula (C1 4A 3S2) (10-35 mass%), (c) belite (C1 2S1) (40-75 mass%), (d) one or more minor phases (0.01-10 mass%) comprising calcium sulfate, alkali sulfates, perovskite, gehlenite, free lime and periclase, and/or a glassy phase, and in which the total percentage of the phases are >= 97%. C1 : CaO (lime); A : Al 2O 3; F1 : Fe 2O 3; S1 : SiO 2; S2 : SO 3; and x : 0.2-0.8. Independent claims are included for: (1) a preparation of the composition comprising contacting the Portland clinker or Portland cement and BCSAF clinker; (2) a cement comprising the composition and 1-40 mass% of calcium sulfate; (3) a concrete comprising the cement; and (4) a preparation of the concrete comprising mixing the cement with a granulate, water, optionally an additives, and optionally one mineral additive.

BELITE SULFOALUMINATE BINDER

La présente invention se rapporte àun liant hydraulique comprenant un clinker sulfoalumineux bélitique et de la siliceayant une surface spécifique BET sous azote d'au moins 50 m /g, la quantité de silice étant inférieure ou égale à 5%, pourcentage exprimé en masse par rapport à la masse de liant.

PROCESS FOR REDUCING THE CONCENTRATION OF CARBON DIOXIDE IN AN EXHAUST GAS

The invention provides a process for reducing the concentration of carbon dioxide in a gas comprising carbon dioxide and water vapour (preferably a flue gas, more preferably a cement plant flue gas) which process comprises contacting the gas with a particulate solid, which solid comprises an alkaline earth metal oxide or hydroxide and a promoter selected from an alkanolamine; an unsubstituted or substituted piperazine; an unsubstituted or substituted morpholine; and a polyethyleneamine oligomer.

PROCESS FOR CARBON DIOXIDE REMOVAL FROM A GAS BY CONTACTING IT WITH A SOLID

The invention provides a process for reducing the concentration of carbon dioxide in a gas comprising carbon dioxide and water vapour (preferably a flue gas, more preferably a cement plant flue gas) which process comprises contacting the gas with a particulate solid, which solid is a waste material which comprises an alkaline earth metal oxide or hydroxide or a mixture thereof and which particulate solid also comprises an added alkali metal compound which is an alkali metal hydroxide, carbonate or bicarbonate, or a mixture thereof.

HYDRAULIC BINDER BASED ON SULFOALUMINOUS CLINKER AND ON PORTLAND CLINKER

La présente invention a pour objet une composition comprenant au moins un clinker Portland et un clinker Belite-Calcium-Sulphoalumineux-Ferrite (BCSAF). The subject of the present invention is a composition comprising at least one Portland clinker and clinker Belite-Calcium-Sulphoaluminous-Ferrite (BCSAF).

HYDRAULIC BINDER BASED ON SULFOALUMINOUS CLINKER AND ON PORTLAND CLINKER

La présente invention a pour objet une composition comprenant au moins un clinker Portland et un clinker Belite-Calcium-Sulphoalumineux-Ferrite (BCSAF).

SURFACTANTS

The invention provides a particulate material for the production of a cement foam which material comprises particles comprising, attached to the particle surface, a surfactant which renders the particles hydrophilic, the surfactant comprising a moiety which is hydrolysable under alkaline conditions, which surfactant, after loss of the moiety by alkaline hydrolysis, renders the particles partially hydrophobic.

ADDITIVES FOR CEMENT

The invention provides a belite-calcium sulphoaluminate-ferrite (BCSAF) cement composition comprising: a BC-NAP clinker which clinker has the following mineralogical composition, based on the total weight of the clinker: 5 to 25%, preferably to 20%, of a calcium aluminoferrite phase having the general formula C2A x F(1-X), wherein X is from 0.2 to 0.8; 15 to 35% of a calcium sulphoaluminate phase; 40 to 75% of belite (C2S); from 0.01 to 10% in total of one or more minor phases selected from calcium sulphates, alkali metal sulphates, perovskite, calcium aluminates, gehlenite, free lime and periclase and/or a vitreous phase; and an alkanolamine.

CLINKER SULFOALUMINEUX HAS HIGH CONTENT OF BELLITE, MANUFACTORING PROCESS Of a TELCLINKER AND ITS USE FOR the PREPARATION OF HYDRAULIC BINDERS.

L'invention concerne un clinker bélite-sulfoalumineux, à son procédé de fabrication et à son utilisation pour la préparation de liants hydrauliques, et comprenant comme composition minéralogique :- 5 à 25%, préférentiellement 10 à 20%, de phase aluminoferrite calcique d'une composition correspondant à la formule générale C2AXF(1-X), avec X compris entre 0,2 et 0,8.- 15 à 35%, préférentiellement 20 à 30%, de phase sulfoaluminate de calcium « yee' limite » (C4A3$),- 40 à 75%, préférentiellement 45 à 65% bélite (C2S),- de 0,01 à 10% d'une ou plusieurs phases mineures choisies parmi les sulfates de calcium, les sulfates alcalins, la perovskite, les aluminates de calcium, la géhlénite, la chaux libre et la périclase, et/ou une phase vitreuse,- et au moins un élément secondaire choisi parmi le soufre, le magnésium, le sodium, le potassium, le bore, le phosphore, le zinc, le manganèse, le titane, le fluor, le chlore, la teneur totale desdits éléments secondaires étant inférieure ou égale à 15%. The invention relates to a belite-sulphoaluminous clinker, to its manufacturing process and its use for the preparation of hydraulic binders, and comprising as mineralogical composition: 5 to 25%, preferably 10 to 20%, of calcium aluminoferrite phase; a composition corresponding to the general formula C2AXF (1-X), with X between 0.2 and 0.8 - 15 to 35%, preferably 20 to 30%, of calcium sulfoaluminate phase "yee 'limit" (C4A3 $), - 40 to 75%, preferably 45 to 65% belite (C2S), - from 0.01 to 10% of one or more minor phases chosen from calcium sulphates, alkaline sulphates, perovskite, aluminates calcium, gehlenite, free lime and periclase, and / or a glassy phase, and at least one secondary element selected from sulfur, magnesium, sodium, potassium, boron, phosphorus, zinc, manganese, titanium, fluorine, chlorine, the total content of the said secondary elements ires being less than or equal to 15%.

Process for the treatment of a silicate mineral

The invention provides a process for the preparation of a second composition, said process comprising the steps of: -preparing a first compositioncomprising an alkali metal magnesium orthosilicate andoptionally either(i) magnesium oxide or(ii) an alkali metal silicate, byreaction, at a temperature from 500 to 1200°C, of an alkali metal carbonate compound, which compound is an alkali metal carbonate, an alkali metal bicarbonate or a mixture thereof, with a magnesium silicate, the molar ratio of alkali metal carbonate compound, expressed as alkali metal oxide of the formula R 2 O, in which R represents an alkali metal, to magnesium silicate, expressed as silicon dioxide, of the formula SiO 2, being from 4:1 to 1:4, and -contacting the first composition with water to produce thesecond composition comprising an amorphous magnesium silicate hydrate (M-S-H). It is possible to isolateor producefurther useful products from the second composition.

Process for the treatment of a silicate mineral

The invention provides a process for the preparation of a second composition, said process comprising the steps of: -preparing a first compositioncomprising an alkali metal magnesium orthosilicate andoptionally either(i) magnesium oxide or(ii) an alkali metal silicate, byreaction, at a temperature from 500 to 1200°C, of an alkali metal carbonate compound, which compound is an alkali metal carbonate, an alkali metal bicarbonate or a mixture thereof, with a magnesium silicate, the molar ratio of alkali metal carbonate compound, expressed as alkali metal oxide of the formula R 2 O, in which R represents an alkali metal, to magnesium silicate, expressed as silicon dioxide, of the formula SiO 2, being from 4:1 to 1:4, and -contacting the first composition with water to produce thesecond composition comprising an amorphous magnesium silicate hydrate (M-S-H). It is possible to isolateor producefurther useful products from the second composition.

Process for the mineralization of carbon dioxide

The invention provides a process for the mineralization of carbon dioxide to form a magnesium carbonate compound, which process comprises contacting the carbon dioxide, in the free form, or in the form of an alkali metal carbonate or bicarbonate, with an alkali metal magnesium silicate to produce the magnesium carbonate compound.

SULFOALUMINATKLINKER MIT HOHEM BELITANTEIL, VERFAHREN ZU DESSEN HERSTELLUNG SOWIE VERWENDUNG FÜR DIE HERSTELLUNG VON HYDRAULISCHEN BINDEMITTELN

PROCESS FOR THE MINERALIZATION OF CARBON DIOXIDE

A process for the mineralization of carbon dioxide to form a magnesium carbonate compound, which process includes contacting the carbon dioxide, in the free form, or in the form of an alkali metal carbonate or bicarbonate, with an alkali metal magnesium silicate to produce the magnesium carbonate compound. 1. A process for the mineralization of carbon dioxide to form a magnesium carbonate compound , which comprises contacting the carbon dioxide , in the free form or in the form of an alkali metal bicarbonate or carbonate , with an alkali metal magnesium silicate to produce the magnesium carbonate compound.2. A process according to in which the carbon dioxide is in the free form in a gas comprising carbon dioxide.3. A process according to in which the carbon dioxide is in the form of an alkali metal carbonate or bicarbonate formed by contacting a gas comprising carbon dioxide with an alkali metal hydroxide or an alkali metal carbonate.4. A process according to in which the alkali metal magnesium silicate is prepared by the reaction of an alkali metal carbonate compound claim 1 , which compound is an alkali metal carbonate claim 1 , an alkali metal bicarbonate or a mixture thereof claim 1 , with a magnesium silicate.5. A process according to in which the alkali metal magnesium silicate is prepared by the reaction claim 1 , at a temperature from 500 to 1100° C. claim 1 , of an alkali metal carbonate compound which compound is an alkali metal carbonate claim 1 , an alkali metal bicarbonate or a mixture thereof claim 1 , with a magnesium silicate claim 1 , the molar ratio of alkali metal carbonate compound claim 1 , expressed as alkali metal oxide of the formula R20 claim 1 , in which R represents an alkali metal claim 1 , to magnesium silicate claim 1 , expressed as silicon dioxide of the formula Si02 claim 1 , being from 2:1 to 1:2 claim 1 , which reaction produces an alkali metal magnesium silicate.6. A process according to in which the reaction is effected at a ...

ZUSAMMENSETZUNG ZUM VERBESSERN DER RHEOLOGISCHEN EIGENSCHAFTEN ZEMENTBASIERTER PRODUKTE UND VERFAHREN ZUR HERSTELLUNG DAVON

PROCESS FOR REMOVAL OF CARBON DIOXIDE FROM A GAS STREAM

A process for reducing the carbon dioxide concentration of a carbon dioxide-containing gas which process includes, in a first stage, contacting the carbon dioxide-containing gas with a treating solution including an alkali metal carbonate and/or hydroxide and with a catalyst to promote the absorption of carbon dioxide to form a second solution including an alkali metal carbonate and bicarbonate and, in a second stage, contacting the second solution with a carbonatable silicate-containing material including an alkaline earth cation capable of forming an insoluble carbonate to produce silica and a solid carbonate including the cation and to regenerate a solution including alkali metal carbonate. 1. A process for reducing the carbon dioxide concentration of a carbon dioxide-containing gas which process comprises , in a first stage , contacting the carbon dioxide-containing gas with a treating solution comprising an alkali metal carbonate and/or hydroxide and with a catalyst to promote the absorption of carbon dioxide to form a second solution comprising an alkali metal carbonate and bicarbonate and , in a second stage , contacting the second solution with a carbonatable silicate-containing material comprising an alkaline earth cation capable of forming an insoluble carbonate to produce silica and a solid carbonate comprising the cation and thus to regenerate a solution comprising alkali metal carbonate.2. A process according to in which claim 1 , after the alkali metal carbonate solution is regenerated claim 1 , it is reused in the treating solution.3. A process according to in which an alkali metal hydroxide is added to the alkali metal carbonate solution to be reused.4. A process according to any one of the preceding claims in which the alkali metal is sodium or potassium.5. A process according to any one of the preceding claims in which the alkaline earth cation is calcium or magnesium.6. A process according to any one of the preceding claims in which the catalyst ...

High Belite-Containing Sulfoaluminous Clinker, Method for the Production and the Use Thereof for Preparing Hydraulic Binders

The present invention concerns a belite-rich sulphoaluminous clinker, a method for producing such a clinker and its use for preparing hydraulic binders, and comprising as a mineralogical formulation: 5 to 25%, preferably 10 to 20%, of a calcium aluminoferrite phase with a formulation corresponding to the general formula C2AXF(1-X), with X comprised between 0.2 and 0.8. 15 to 35%, preferably 20 to 30%, of a calcium sulphoaluminate phase "yee' limit" (C4A3$), 40 to 75%, preferably 45 to 65% belite (C2S), from 0.01 to 10% of one or several minor phases selected from calcium sulphates, alkaline sulphates, perovskite, calcium aluminates, gehlenite, free limestone and periclase, and/or a vitreous phase, and at least one or several secondary elements selected from sulphur, magnesium, sodium, potassium, boron, phosphorus, zinc, manganese, titanium, fluorine, chlorine, the total content of these secondary elements being less than or equal to 15%.

Hydraulic binder based on sulfoaluminous clinker and on portland clinker

The subject of the present invention is a composition comprising at least one Portland clinker and one belite-calcium-sulfoaluminous-ferrite (BCSAF) clinker.

ZUSAMMENSETZUNG ZUM VERBESSERN DER RHEOLOGISCHEN EIGENSCHAFTEN ZEMENTBASIERTER PRODUKTE UND VERFAHREN ZUR HERSTELLUNG DAVON

HYDRAULIC BINDER WITH A BASE OF SULFOALUMINATE CLINKER AND PORTLAND CLINKER

The present invention relates to a composition including at least a Portland clinker and a Belite-Calcium-Sulphoaluminate-Ferrite clinker (BCSAF).

Hydraulic binder with a base of sulfoaluminate clinker and portland clinker

The present invention relates to a composition including at least a Portland clinker and a Belite-Calcium-Sulphoaluminate-Ferrite clinker (BCSAF).

High belite-containing sulfoaluminous clinker, method for the production and the use thereof for preparing hydraulic binders

A sulphoaluminate clinker includes as a phasic formulation, compared with the total weight of clinker: 5 to 25% of a calcium aluminoferrite phase with a formulation corresponding to the general formula C2AXF(1X), with X comprised between 0.2 and 0.8; 15 to 35% of a calcium sulphoaluminate phase yee' limit (C4A3$); 40 to 75% belite (C2S); from 0.01 to 10% of one or several minor phases selected from the group consisting of calcium sulphates, alkali sulphates, perovskite, calcium aluminates, gehlenite, free lime and periclase, and/or a vitreous phase, and additives including at least sodium and boron present in the following quantities, by weight as compared to the total weight of the clinker: from 0.1 to 5% of sodium expressed as sodium oxide and from 0.2 to 3% of boron, expressed as boron oxide, the total content of said additives being less than or equal to 15%.

HIGH BELITE-CONTAINING SULFOALUMINOUS CLINKER, METHOD FOR THE PRODUCTION AND THE USE THEREOF FOR PREPARING HYDRAULIC BINDERS

A sulphoaluminate clinker includes as a phasic formulation, compared with the total weight of clinker: 5 to 25% of a calcium aluminoferrite phase with a formulation corresponding to the general formula C2AXF(1X), with X comprised between 0.2 and 0.8; 15 to 35% of a calcium sulphoaluminate phase yee' limit (C4A3$); 40 to 75% belite (C2S); from 0.01 to 10% of one or several minor phases selected from the group consisting of calcium sulphates, alkali sulphates, perovskite, calcium aluminates, gehlenite, free lime and periclase, and/or a vitreous phase, and additives including at least sodium and boron present in the following quantities, by weight as compared to the total weight of the clinker: from 0.1 to 5% of sodium expressed as sodium oxide and from 0.2 to 3% of boron, expressed as boron oxide, the total content of said additives being less than or equal to 15%.

ADDITIVES FOR A HYDRAULIC BINDER BASED ON A BELITE-CALCIUM-SULPHOALUMINATE-FERRITE CLINKER

Surfactants

A particulate material for the production of a cement foam which material includes particles including, attached to the particle surface, a surfactant which renders the particles hydrophilic, the surfactant including a moiety which is hydrolysable under alkaline conditions, which surfactant, after loss of the moiety by alkaline hydrolysis, renders the particles partially hydrophobic.

Process for the mineralization of carbon dioxide

A process for the mineralization of carbon dioxide to form a magnesium carbonate compound, which process includes contacting the carbon dioxide, in the free form, or in the form of an alkali metal carbonate or bicarbonate, with an alkali metal magnesium silicate to produce the magnesium carbonate compound.

HIGH BELITE-CONTAINING SULFOALUMINOUS CLINKER, METHOD FOR THE PRODUCTION AND THE USE THEREOF FOR PREPARING HYDRAULIC BINDERS.

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).

BELITE SULFOALUMINATE BINDER

A hydraulic binder includes a belite sulfoaluminate clinker and silica having a BET specific surface area in nitrogen of at least 50 m/g, the quantity of silica being lower than or equal to 5%, the percentage being expressed as a mass percentage in relation to the mass of the binder. 1. A hydraulic binder comprising a belitic sulfoaluminous clinker and silica having a BET specific surface area under nitrogen of at least 50 m/g , the amount of silica being less than or equal to 5% , a percentage expressed by mass based on the binder mass.2. The hydraulic binder according to claim 1 , wherein the clinker is a belite-calcium-sulfoaluminate-ferrite (BCSAF) clinker.3. A hydraulic composition comprising water and a hydraulic binder according to .4. A shaped object for the building field comprising a hydraulic binder according to .5. The method for manufacturing a hydraulic binder according to claim 1 , wherein a belitic sulfoaluminous clinker is put into contact with at most 5% of silica claim 1 , a mass percentage based on the binder mass.6. The method according to claim 5 , wherein the clinker and the silica are mixed or milled together.7. A method for improving compressional strength beyond 1 day after mixing of a hydraulic binder comprising a belitic sulfoaluminous clinker claim 5 , the method comprising mixing at most 5% of silica claim 5 , a mass percentage based on the binder mass claim 5 , with a belitic sulfoaluminous clinker claim 5 , the silica having a BET specific surface area under nitrogen of at least 50 m/g.8. A hydraulic composition comprising water and a hydraulic binder according to .9. A shaped object for the building field comprising a hydraulic binder according to . The present invention relates to a hydraulic binder comprising a belitic sulfoaluminous clinker, for example a belite-calcium-sulfoaluminate-ferrite (BCSAF) clinker.Belitic sulfoaluminous clinkers are clinkers having a low alite content, in particular an alite content of less than or ...

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).

Hydraulic binder and hydraulic composition comprising same

A hydraulic binder which includes a clinker with a specific shape, the clinker including as main phases, given as weight percentages relative to the total weight of the clinker: (i) 70 to 95% of a belite phase having a particle size such that the Dv50 ranges from 5 to 15 μm; (ii) 5 to 30% of a calcium aluminoferrite phase; and (iii) less than 5% of minor phases; the clinker having an Al2O3/Fe2O3 weight ratio of less than 1.5; and the clinker including less than 5% of alite phase and less than 5% of calcium sulphoaluminate phase; and at least 0.5% dry weight of an activator made of calcium sulphate, as a weight percentage relative to the total weight of phases (i) to (iii).

CEMENT SHRINKAGE REDUCING AGENT AND METHOD FOR OBTAINING CEMENT BASED ARTICLES HAVING REDUCED SHRINKAGE

The invention relates to a composition comprising a hydraulic binder, a low molecular weight glycol having the formula C_nH_2n(OH)₂ wherein n is an integer from 2 to 10, preferably 2 to 9, and a fluorinated surfactant capable of reducing the surface tension of pure water to a value below 30 mN/m at a concentration of 1% or less. The invention also relates to a wet mortar or concrete composition comprising a hydraulic binder, a low molecular weight glycol having the formula C_nH_2n(OH)₂ wherein n is an integer from 2 to 10, preferably 2 to 9, and a fluorinated surfactant capable of reducing the surface tension of pure water to a value below 30 mN/m at a dosage of 1% or less, water and sand and/or aggregates and/or fillers. The invention also relates to a method for preparing same.

Process for the treatment of a silicate mineral

A process for the treatment of a silicate mineral, includes: preparing a first composition including an alkali metal magnesium orthosilicate and optionally either (i) magnesium oxide or (ii) an alkali metal silicate, by reaction, at a temperature from 500 to 1200° C., of an alkali metal carbonate compound, which compound is an alkali metal carbonate, an alkali metal bicarbonate or a mixture thereof, with a magnesium silicate, the molar ratio of alkali metal carbonate compound, expressed as alkali metal oxide of the formula R2O, in which R represents an alkali metal, to magnesium silicate, expressed as silicon dioxide, of the formula SiO2, being from 4:1 to 1:4, and contacting the first composition with water to produce a second composition comprising an amorphous magnesium silicate hydrate (M-S—H).

Surfactant treated particulate material for production of cement foam

The invention provides a particulate material for the production of a cement foam which material comprises particles comprising, attached to the particle surface, a surfactant which renders the particles hydrophilic, the surfactant comprising a moiety which is hydrolysable under alkaline conditions, which surfactant, after loss of the moiety by alkaline hydrolysis, renders the particles partially hydrophobic.

PROCESS FOR REDUCING THE CONCENTRATION OF CARBON DIOXIDE IN AN EXHAUST GAS

A process for reducing the concentration of carbon dioxide in a gas including carbon dioxide and water vapour (for example a flue gas or a cement plant flue gas) which process includes contacting the gas with a particulate solid, which solid includes an alkaline earth metal oxide or hydroxide and a promoter selected from an alkanolamine; an unsubstituted or substituted piperazine; an unsubstituted or substituted morpholine; and a polyethyleneamine oligomer.

SURFACTANTS

A particulate material for the production of a cement foam which material includes particles including, attached to the particle surface, a surfactant which renders the particles hydrophilic, the surfactant including a moiety which is hydrolysable under alkaline conditions, which surfactant, after loss of the moiety by alkaline hydrolysis, renders the particles partially hydrophobic.

Process for removal of carbon dioxide from a gas stream

A process for reducing the carbon dioxide concentration of a carbon dioxide-containing gas which process includes, in a first stage, contacting the carbon dioxide-containing gas with a treating solution including an alkali metal carbonate and/or hydroxide and with a catalyst to promote the absorption of carbon dioxide to form a second solution including an alkali metal carbonate and bicarbonate and, in a second stage, contacting the second solution with a carbonatable silicate-containing material including an alkaline earth cation capable of forming an insoluble carbonate to produce silica and a solid carbonate including the cation and to regenerate a solution including alkali metal carbonate.

Additives for cement

The invention provides a belite-calcium sulphoaluminate-ferrite (BCSAF) cement composition comprising: a BCSAF clinker which clinker has the following mineralogical composition, based on the total weight of the clinker: 5 to 25%, preferably 10 to 20%, of a calcium aluminoferrite phase having the general formula C2AxF(1-X), wherein X is from 0.2 to 0.8; 15 to 35% of a calcium sulphoaluminate phase; 40 to 75% of belite (C2S); from 0.01 to 10% in total of one or more minor phases selected from calcium sulphates, alkali metal sulphates, perovskite, calcium aluminates, gehlenite, free lime and periclase and/or a vitreous phase; and an alkanolamine.

PROCESS FOR CARBON DIOXIDE REMOVAL FROM A GAS BY CONTACTING IT WITH A SOLID

A process for reducing the concentration of carbon dioxide in a gas including carbon dioxide and water vapour which process includes contacting the gas with a particulate solid, which solid is a waste material which includes an alkaline earth metal oxide or hydroxide or a mixture thereof and which particulate solid also includes an added alkali metal compound which is an alkali metal hydroxide, carbonate or bicarbonate, or a mixture thereof. 1. A process for reducing the concentration of carbon dioxide in a gas comprising carbon dioxide and water vapour which process comprises contacting the gas with a particulate solid , which solid is a waste material which comprises an alkaline earth metal oxide or hydroxide or a mixture thereof and which particulate solid also comprises an added alkali metal compound which is an alkali metal hydroxide , carbonate or bicarbonate , or a mixture thereof.2. A process according to claim 1 , wherein the alkali metal compound is sodium carbonate.3. A process according to claim 1 , wherein the process is carried out in a fluidised bed.4. A process according to claim 1 , wherein the particulate solid comprises an alkaline earth metal hydroxide.5. A process according to claim 1 , wherein the alkaline earth metal is calcium.6. A process according to claim 1 , wherein an one of the the process is conducted at a temperature from 5 to 100° C.7. A process according to claim 1 , wherein the process is conducted at a temperature from 2 to 20° C. higher than the dew point of the gas treated.8. A process for the manufacture of cement which comprises treating flue gas generated during the manufacture by a process according to .9. A carbonated particulate product obtainable by a process according to .10. A cement or concrete comprising a carbonated particulate product according to . This invention relates to a process for reducing the concentration of carbon dioxide in a carbon dioxide-containing gas.Many industrial processes, including the ...

SURFACTANTS

A particulate material for the production of a cement foam which material includes particles including, attached to the particle surface, a surfactant which renders the particles hydrophilic, the surfactant including a moiety which is hydrolysable under alkaline conditions, which surfactant, after loss of the moiety by alkaline hydrolysis, renders the particles partially hydrophobic. 1. A particulate material for the production of a cement foam which material comprises particles comprising , attached to the particle surface , a surfactant which renders the particles hydrophilic , the surfactant comprising a moiety which is hydrolysable under alkaline conditions , which surfactant , after loss of the moiety by alkaline hydrolysis , renders the particles partially hydrophobic.2. A particulate material according to in which the surfactant is of the general formula:{'br': None, 'sub': 'q', '(A)B-E-D \u2003\u2003(I)'}wherein A represents a group attached to the group B and capable of attaching to the surface of a particle; and q is from 1 to 6;B represents a hydrophobic group capable of rendering the particle partially hydrophobic;E represents a group susceptible to alkaline hydrolysis; andD represents a hydrophilic group which renders the surfactant water soluble.4. A method of preparing a particulate material according to which comprises contacting particles with a surfactant as defined in .5. A cementitious composition which comprises a particulate material as defined in and a cement.6. A cementitious composition according to which comprises liquid water.7. A method of preparing a cementitious composition according to which comprises contacting the particulate material and the cement.8. A cementitious foam which comprises a particulate material as defined in claim 1 , a cement claim 1 , liquid water and a gas.9. A method of preparing a cementitious foam which comprises foaming a cementitious composition according to .10. A solid cementitious foam obtainable by ...

PROCESS FOR THE TREATMENT OF A SILICATE MINERAL

A process for the treatment of a silicate mineral, includes: preparing a first composition including an alkali metal magnesium orthosilicate and optionally either (i) magnesium oxide or (ii) an alkali metal silicate, by reaction, at a temperature from 500 to 1200° C., of an alkali metal carbonate compound, which compound is an alkali metal carbonate, an alkali metal bicarbonate or a mixture thereof, with a magnesium silicate, the molar ratio of alkali metal carbonate compound, expressed as alkali metal oxide of the formula RO, in which R represents an alkali metal, to magnesium silicate, expressed as silicon dioxide, of the formula SiO, being from 4:1 to 1:4, and contacting the first composition with water to produce a second composition comprising an amorphous magnesium silicate hydrate (M—S—H). 1. A process for the treatment of a silicate mineral , said process comprising the-steps-of:{'sub': 2', '2, 'preparing a first composition comprising an alkali metal magnesium orthosilicate and optionally either (i) magnesium oxide or (ii) an alkali metal silicate, by reaction, at a temperature from 500 to 1200° C., of an alkali metal carbonate compound, which compound is an alkali metal carbonate, an alkali metal bicarbonate or a mixture thereof, with a magnesium silicate, the molar ratio of alkali metal carbonate compound, expressed as alkali metal oxide of the formula RO, in which R represents an alkali metal, to magnesium silicate, expressed as silicon dioxide, of the formula SiO, being from 4:1 to 1:4, and'}contacting the first composition with water to produce a second composition comprising an amorphous magnesium silicate hydrate (M—S—H).2. A process according to claim 1 , wherein M—S—H is represented by an oxide formula in the form pMgO.SiO.qHO where p is from 0.5 to 2.0 and q is from 1 to 4.3. A process according to claim 1 , wherein the magnesium silicate is a magnesium silicate in which the molar ratio of magnesium oxide to silica is from 0.5 to 3.4. A process ...

NOVEL HYDRAULIC BINDER AND HYDRAULIC COMPOSITION COMPRISING SAME

A hydraulic binder which includes a clinker with a specific shape, the clinker including as main phases, given as weight percentages relative to the total weight of the clinker: (i) 70 to 95% of a belite phase having a particle size such that the Dv50 ranges from 5 to 15 μm; (ii) 5 to 30% of a calcium aluminoferrite phase; and (iii) less than 5% of minor phases; the clinker having an AlO/FeOweight ratio of less than 1.5; and the clinker including less than 5% of alite phase and less than 5% of calcium sulphoaluminate phase; and at least 0.5% dry weight of an activator made of calcium sulphate, as a weight percentage relative to the total weight of phases (i) to (iii). 1. A hydraulic binder which comprises (i) from 70 to 95% of a belite phase having a particle size such that Dv50 ranges from 5 to 15 μm;', '(ii) from 5 to 30% of a calcium alumino-ferrite phase; and', '(iii) less than 5% of minor phases;, 'a particulate-shaped clinker, the clinker comprising as main phases, in % expressed in mass relative to the total mass of the clinker{'sub': 2', '3', '2', '3, 'the clinker having an AlO/FeOmass ratio lower than 1.5; and'}the clinker comprising less than 5% of alite phase and less than 5% of calcium sulpho-aluminate phaseand at least 0.5% dry mass of a calcium sulphate-based activator, in mass percent relative to the total mass of the phases (i) to (iii).2. The hydraulic binder according to claim 1 , comprising a setting accelerator.3. The hydraulic binder according to claim 1 , wherein the clinker comprises less than 5% of water-soluble alkaline salts.4. The hydraulic binder according to claim 1 , wherein the clinker is prepared by a process which comprises:decarbonating a raw mix having a particle size such that the maximum diameter is lower than 100 μm; (i) from 70 to 95% of said belite phase;', '(ii) from 5 to 30% of said calcium alumino-ferrite phase; and', '(iii) less than 5% of minor phases;', {'sub': 2', '3', '2', '3, 'the clinker having an AlO/FeOmass ratio ...

Enhanced blended and portland cement compositions

Concrete Mix

A concrete mix comprising hydraulic cementitious material, aggregates and water, wherein at least a portion of the aggregates in the total mix is coated externally with a well-bonded polymer layer of at least 1 µm in average thickness, said layer comprising a polymer having a high elongation and high energy-absorption capacity at the temperatures at which the concrete is designed to be used.

Rice hull ash concrete admixture

A cement admixture and cement composition containing said admixture comprising finely ground rice hull ash formed by slurry grinding of said ash to a volume medium particle diameter or up to 4 micrometers.

Cement and cement composition having improved rheological properties

An improved hydraulic cement and resultant hydraulic cement composition having an imidized acrylic polymer uniformly distributed therein.

Cement admixture product

The present invention is directed to a polyoxyalkylene ammonium salt of an imidized polycarboxylic acid polymer cement admixture, storage stable aqueous solutions of said polymer, and to improved cement compositions containing said polymer.

Enhanced blended and portland cement compositions

Enhanced blended and portland cement compositions

This invention relates to an enhanced blended cement composition and to enhanced strength portland cements containing at least 4% C₄AF when mixed with up to 0.2% of a higher trialkanolamine to exhibit a marked increase in 7 and 28-day compressive strengths. The higher trialkanolamine strength enhancing additive may be admixed with the cement powder or may be interground with the cement clinker during finish milling.

Processing additives for blended cements

This invention relates to a method of enhancing the later age strength of certain blended cements. Under the process of this invention, certain blended cements, in particular those made from cement clinkers containing at least 4% C 4 AF, when mixed with up to 0.2% triisopropanolamine exhibit a marked increase in 7 and 28-day compressive strengths. The blended cements of this invention contain between 5 and 60% fillers or clinker substitutes. The triisopropanolamine strength enhancing additive may be admixed with the cement powder or may be interground with the cement clinker during finish milling.

Strength enhancing additive for certain portland cements

This invention relates to a method of producing enhanced strength portland cements. Under the process of this invention, certain portland cements, in particular those containing at least 4% C 4 AF and up to 0.2% of a strength enhancing additive comprising triisopropanolamine, exhibit a marked increase in 7 and 28 day compressive strength. The triisopropanolamine strength enhancing additive may be admixed with cement powder or may be interground as a grinding aid with cement clinkder during finish milling.

Processing additives for blended cements

This invention relates to a method of enhancing the later age strength of certain blended cements. Under the process of this invention, certain blended cements, in particular those made from cement clinkers containing at least 4% C4AF, when mixed with up to 0.2% of a higher trialkanolamine exhibit a marked increase in 7 and 28-day compressive strengths. The blended cements of this invention contain between 5 and 80% fillers or clinker substitutes. The higher trialkanolamine strength enhancing additive may be admixed with the cement powder or may be interground with the cement clinker during finish milling.

Strength enhancing additive for certain portland cements

This invention relates to a method of producing enhanced strength portland cements. Under the process of this invention, certain portland cements, in particular those containing at least 4% C 4 AF and up to 0.2% of a strength enhancing additive comprising triisopropanolamine, exhibit a marked increase in 7 and 28 day compressive strength. The triisopropanolamine strength enhancing additive may be admixed with cement powder or may be interground as a grinding aid with cement clinker during finish milling.

Enhanced blended and portland cement compositions

IMPROVED MIXING AND PORTLAND CEMENT COMPOSITIONS.

Improved blend cement and portland cement compositions

IMPROVED COMBINED CEMENT AND PORTLAND COMPOSITIONS.

ESTA INVENCION ES RELATIVA A UNA COMPOSICION DE CEMENTO MEZCLADO MEJORADA Y A UN CEMENTO PORTLAND DE RESISTENCIA MEJORADA, QUE CONTIENE AL MENOS 4% DE C4AF, CUANDO SE MEZCLA CON HASTA 0,2 % DE UNA TRIALCANOLAMINA SUPERIOR PARA EXHIBIR UN MARCADO INCREMENTO DE RESISTENCIA A LA COMPRESION DESPUES DE ENTRE 7 Y 28 DIAS. EL ADITIVO TRIALCANOLAMINA SUPERIOR MEJORADOR DE RESISTENCIA PUEDE SER MEZCLADO CON EL POLVO DE CEMENTO O PUEDE SER ENTREMEZCLADO CON EL CLINKER DE CEMENTO DURANTE EL MOLIDO FINAL. THIS INVENTION IS RELATIVE TO AN IMPROVED MIXED CEMENT COMPOSITION AND TO AN IMPROVED STRENGTH PORTLAND CEMENT, CONTAINING AT LEAST 4% C4AF, WHEN MIXED WITH UP TO 0.2% OF A SUPERIOR TRIALCANOLAMINE TO EXHIBIT INCREASED MARKING OF INCREASED COMPRESSION AFTER BETWEEN 7 AND 28 DAYS. THE STRENGTH UPPER IMPROVING TRIALCANOLAMINE ADDITIVE MAY BE MIXED WITH THE CEMENT POWDER OR MAY BE INTERMEDIATED WITH THE CEMENT CLINKER DURING THE FINAL GROUND.

Patent FR2653114B1

Enhanced blended and portland cement compositions.

Enhanced blended and portland cement compositions

CEMENT COMPOSITION WITH IMPROVED RESISTANCE AND PROCEDURE TO INCREASE THE RESISTANCE OF HYDRAULIC CEMENT MIXTURES

La presente invención se refiere a un cemento mezclado, con resistencia aumentada, caracterizado porque comprende una mezcla de escoria, que tiene al menos 4 por ciento de C4AF, yeso. 5 a 80 por ciento en peso de un relleno o substituto de la escoria, junto con un aditivo que comprende una trialcanolamina superior, que tiene cuando menos un grupo de hidroxialquilo con 3 a 5 átomos de carbono, en una cantidad de hasta el 0.2 por ciento en peso, con base en el cemento y suficiente para aumentar la resistencia compresiva a los 7 y 28 días.

Enhanced blended and portland cement compositions.

THIS INVENTION RELATES TO AN ENHANCED BLENDED CEMENT COMPOSITION AND TO ENHANCED STRENGTH PORTLAND CEMENTS CONTAINING AT LEAST 4% C4AF WHEN MIXED UP TO 0.2% OF A HIGHER TRIALKANOLAMINE TO EXHIBIT A MARKED INCREASE IN 7 AND 28- DAY COMPRESSIVE STRENGTHS. THE HIGHER TRIALKANOLAMINE STRENGTH ENHANCING ADDITIVE MAY BE ADMIXED WITH THE CEMENT POWDER OR MAY BE INTERGROUND WITH THE CEMENT CLINKER DURING FINISH MILLING.

Enhanced blended and portland cement compositions characterised by the addition of a higher trialkanolamine as a strength enhancing agent

Enhanced blended and portland cement compositions

Cement admixture and defoaming agent

Additives for cement

The invention provides a belite-calcium sulphoaluminate-ferrite (BCSAF) cement composition comprising: a BCSAF clinker which clinker has the following mineralogical composition, based on the total weight of the clinker: 5 to 25%, preferably 10 to 20%, of a calcium aluminoferrite phase having the general formula C 2 A x F (1-x) , wherein X is from 0.2 to 0.8; 15 to 35% of a calcium sulphoaluminate phase; 40 to 75% ofbelite (C 2 S); from 0.01 to 10% in total of one or more minor phases selected from calcium sulphates, alkali metal sulphates, perovskite, calcium aluminates, gehlenite, free lime and periclase and/or a vitreous phase; a water-soluble calcium salt; and an alkanolamine.

ADDITIVES FOR HYDRAULIC BINDER BASED ON CLINKER BELITE - CALCIUM - SULPHOALUMINOUS - FERRITE (BCSAF)

La présente invention a pour objet une composition comprenant au moins, en % exprimé en masse par rapport à la masse totale de composition, - de 0,01 à 3 % d'acide polycarboxylique ou un de ses sels ledit acide polycarboxylique comprenant de 2 à 4 groupes carboxyle par molécule; et - de 97 à 99,99 % d'un clinker Belite-Calcium-Sulphoalumineux-Ferrite (BCSAF). The subject of the present invention is a composition comprising at least, in % expressed by mass relative to the total mass of composition, - from 0.01 to 3% of polycarboxylic acid or one of its salts, said polycarboxylic acid comprising from 2 to 4 carboxyl groups per molecule; and - from 97 to 99.99% of a Belite-Calcium-Sulphoaluminous-Ferrite (BCSAF) clinker.

Improved mix and Portland cement compositions.

Enhanced blended and portland cement compositions

Enhanced blended and portland cement compositions

CEMENT MIXTURE OF IMPROVED RESISTANCE, PROCESS FOR IMPROVING RESISTANCE THEREOF, AND ADDITIVE FOR USE.

L'invention concerne un ciment mélangé dont la résistance est améliorée. Selon l'invention, il contient un mélange de clinker ayant au moins 4% de C4 AF, de gypse, 5 à 80% en poids d'une charge ou d'une substitut de clinker avec un additif qui comprend une trialkanolamine supérieure ayant au moins un groupe alkyle C3 -C5 en une quantité pouvant atteindre 0,2% en poids en se basant sur le ciment et suffisante pour augmenter la résistance à la compression à 7 et 28 jours. L'invention s'applique notamment à la construction. Disclosed is a mixed cement with improved strength. According to the invention, it contains a mixture of clinker having at least 4% C4 AF, gypsum, 5 to 80% by weight of a filler or a clinker substitute with an additive which comprises a higher trialkanolamine having at least minus a C3 -C5 alkyl group in an amount of up to 0.2% by weight based on the cement and sufficient to increase the compressive strength at 7 and 28 days. The invention applies in particular to construction.

IMPROVED COMBINED CEMENT AND PORTLAND COMPOSITIONS.

ESTA INVENCION ES RELATIVA A UNA COMPOSICION DE CEMENTO MEZCLADO MEJORADA Y A UN CEMENTO PORTLAND DE RESISTENCIA MEJORADA, QUE CONTIENE AL MENOS 4% DE C4AF, CUANDO SE MEZCLA CON HASTA 0,2 % DE UNA TRIALCANOLAMINA SUPERIOR PARA EXHIBIR UN MARCADO INCREMENTO DE RESISTENCIA A LA COMPRESION DESPUES DE ENTRE 7 Y 28 DIAS. EL ADITIVO TRIALCANOLAMINA SUPERIOR MEJORADOR DE RESISTENCIA PUEDE SER MEZCLADO CON EL POLVO DE CEMENTO O PUEDE SER ENTREMEZCLADO CON EL CLINKER DE CEMENTO DURANTE EL MOLIDO FINAL. THIS INVENTION IS RELATIVE TO AN IMPROVED MIXED CEMENT COMPOSITION AND TO AN IMPROVED STRENGTH PORTLAND CEMENT, CONTAINING AT LEAST 4% C4AF, WHEN MIXED WITH UP TO 0.2% OF A SUPERIOR TRIALCANOLAMINE TO EXHIBIT INCREASED MARKING OF INCREASED COMPRESSION AFTER BETWEEN 7 AND 28 DAYS. THE STRENGTH UPPER IMPROVING TRIALCANOLAMINE ADDITIVE MAY BE MIXED WITH THE CEMENT POWDER OR MAY BE INTERMEDIATED WITH THE CEMENT CLINKER DURING THE FINAL GROUND.

Improved mix and Portland cement compositions.

Additives for cement

Additives for cement

NEW CLINKER, HYDRAULIC BINDER AND HYDRAULIC COMPOSITION COMPRISING SAME

La présente invention se rapporte à un clinker comprenant comme phases principales, en % exprimé en masse par rapport à la masse totale de clinker : (i) de 70 à 95 % d'une phase bélite ayant une taille de particule telle que le Dv50 est compris de 5 à 15 µm ; (ii) de 5 à 30 % d'une phase alumino-ferrite de calcium; et (iii) moins de 5 % de phases mineures ; le clinker ayant un rapport massique Al2O3/Fe2O3 inférieur à 1,5 ; et le clinker comprenant moins de 5 % de phase alite et moins de 5 % de phase sulfoaluminate de calcium. The present invention relates to a clinker comprising as main phases, in% expressed by weight relative to the total mass of clinker: (i) from 70 to 95% of a belite phase having a particle size such that the Dv50 is from 5 to 15 μm; (ii) from 5 to 30% of an alumino-ferrite calcium phase; and (iii) less than 5% of minor phases; the clinker having an Al 2 O 3 / Fe 2 O 3 mass ratio of less than 1.5; and the clinker comprising less than 5% of alite phase and less than 5% of calcium sulphoaluminate phase.

COMPOSITION COMPRISING CARBONATE PARTICLES

HYDRAULIC BINDER BASED ON CLINKER SULFOALUMINOUS AND CLINKER PORTLAND

SULFOALUMINOUS CLINKER HAVING A HIGH BELITE CONTENT, PROCESS FOR PRODUCING SUCH A CLINKER AND USE THEREOF FOR PREPARING HYDRAULIC BINDERS.

BELIVE SULFOALUMINOUS BINDER

HYDRAULIC BINDER BASED ON CLINKER SULFOALUMINOUS AND CLINKER PORTLAND

La présente invention a pour objet une composition comprenant au moins - un clinker Portland ou ciment Portland; et - un clinker Belite-Calcium-Sulphoalumineux-Ferrite (BCSAF). The subject of the present invention is a composition comprising at least - one Portland clinker or Portland cement; and - a Belite-Calcium-Sulphoaluminous-Ferrite (BCSAF) clinker.

ADDITIVES FOR HYDRAULIC BINDER BASED ON CLINKER BELITE - CALCIUM - SULPHOALUMINOUS - FERRITE (BCSAF)

La présente invention a pour objet une composition comprenant au moins, en % exprimé en masse par rapport à la masse totale de composition, - de 0,01 à 3 % d'acide polycarboxylique ou un de ses sels ledit acide polycarboxylique comprenant de 2 à 4 groupes carboxyle par molécule; et - de 97 à 99,99 % d'un clinker Belite-Calcium-Sulphoalumineux-Ferrite (BCSAF). The subject of the present invention is a composition comprising at least, in% expressed by weight relative to the total mass of the composition, from 0.01 to 3% of polycarboxylic acid or a salt thereof, said polycarboxylic acid comprising from 2 to 4 carboxyl groups per molecule; and from 97 to 99.99% of a Belite-Calcium-Sulfoaluminous-Ferrite clinker (BCSAF).

Improved cement admixture product

The present invention is directed to a polyoxyalkylene ammonium salt of an imidized polycarboxylic acid polymer cement admixture, storage stable aqueou s solutions of said polymer, and to improved cement compositions containing sa id polymer.

COMPOSITION COMPRISING CARBONATE PARTICLES

La présente invention se rapporte à une composition comprenant en proportions massiques : -un matériau d'une classe granulométrique ultrafine, comprenant des particules individuelles de D90 inférieur à 1 µm ; -un matériau d'une classe granulométrique fine, comprenant des particules dont le D10 et le D90 sont compris de 1 µm à 120 µm, ledit matériau de la classe granulométrique fine étant un carbonate d'au moins un alcalinoterreux ; -un matériau d'une classe granulométrique moyenne, comprenant des particules dont le D10 et le D90 sont compris de 120 µm à 5 mm ; et -une phase liante solide reliant aux moins certaines des particules du matériau de la classe granulométrique fine à d'autres particules du matériau de la classe granulométrique fine, de la classe granulométrique ultrafine ou de la classe granulométrique moyenne, ladite phase liante solide comprenant des ions phosphate, oxalate ou leurs mélanges et des ions dudit alcalinoterreux. The present invention relates to a composition comprising in mass proportions: a material of an ultrafine particle size class, comprising individual D90 particles of less than 1 μm; a material of a fine particle size class comprising particles whose D10 and D90 are from 1 μm to 120 μm, said fine particle size material being a carbonate of at least one alkaline earth metal; a material of average particle size class, comprising particles whose D10 and D90 are between 120 μm and 5 mm; and a solid binder phase connecting at least some of the particles of the material of the fine particle size class to other particles of the fine particle size class, the ultrafine particle size class or the average particle size class, said solid binder phase comprising phosphate ions, oxalate or mixtures thereof and ions of said alkaline earth metal.

Hydraulic binder based on sulfoaluminous clinker and on mineral additions

The subject of the present invention is a composition comprising, as % expressed by weight relative to the total weight of composition, at least from 5 to 80% of mineral additions; and from 20 to 95% of a belite-calcium-sulfoaluminous-ferrite (BCSAF) clinker.

Low shrinkage cement composition

A cement composition capable of inhibiting drying shrinkage and cracking resulting therefrom composed of cement and an alkyl or cycloalkyl carbamate, an alkylene dicarbamate, polyoxyalkylene dicarbamate or mixtures thereof.

High early-strength-enhancing admixture for precast hydraulic cement and compositions containing same

A high early-strength admixture for precast hydraulic cement comprises a calcium salt and a copolymer having a carbon-containing backbone to which are attached cement-anchoring members, such as carboxyl groups, and to which are also attached oxyalkylene pendant groups by linkages selected from the group consisting of amide and imide members. The copolymers used are preferably formed by reacting an acrylic polymer with ammonia or an alkoxylated amine. The calcium salt, preferably calcium nitrite, and the copolymer can added simultaneously as one admixture, or separately. The invention relates also to methods for enhancing high early strength in concrete, cement, masonry, and mortar mixtures generally, and to precast concrete particularly, and also pertains to such hydraulic mixtures containing the calcium salt and copolymer.

High early-strength-enhancing admixture for precast hydraulic cement and compositions containing same

Improved cement additive product enabling to achieve better rheological properties and method of obtaining such additive product

High belite-containing sulfoaluminous clinker, method for the production and the use thereof for preparing hydraulic binders.

La invencion se refiere a una escoria o clinker sulfoaluminosa de belita, a un metodo para la produccion y el uso de la misma para la preparacion de aglomerantes o cementadores hidraulicos, que comprende la siguiente composicion mineralogica: 5 a 35%, preferiblemente 10 a 20% de una fase de aluminoferrita de calcio cuya composicion corresponde a una formula general C2AXE(l-X) , en donde X varia desde 0.2 hasta 0.8, 15 hasta 35%, preferiblemente 20 a 30%, una fase de aluminosilicato de calcio " limite yee'" (C4A3$), - 40 a 75%, preferiblemente 45 a 65% de belita (C2S), - 0.01 a 10% de una o varias fases minerales seleccionadas de sulfatos de calcio, sulfatos alcalinos, perovskita, aluminatos de calcio, gehienita, cal libre, periclasa y/o una fase vitrea y al menos un elemento secundario seleccionado de azufre, magnesio, sodio, potasio, boro, fosfor, zinc, manganeso, titanio, fluor, cloro, en donde el contenido total de dichos elementos secundarios es igual o menor que 15%.

Process for carbon dioxide removal from a gas by contacting it with a solid

The invention provides a process for reducing the concentration of carbon dioxide in a gas comprising carbon dioxide and water vapour (preferably a flue gas, more preferably a cement plant flue gas) which process comprises contacting the gas with a particulate solid, which solid is a waste material which comprises an alkaline earth metal oxide or hydroxide or a mixture thereof and which particulate solid also comprises an added alkali metal compound which is an alkali metal hydroxide, carbonate or bicarbonate, or a mixture thereof.

Process for the mineralization of carbon dioxide

Belite sulfoaluminate binder.

La invención se refiere a un aglutinante hidráulico que comprende un clínker sulfoaluminoso belítico y sílice que tiene un área superficial específica BET en nitrógeno de por lo menos 50 m2/g, la cantidad de sílice es menor que o igual al 5%, el porcentaje se expresa como un porcentaje de masa en relación con la masa del aglutinante.

Polymers based on maleic imides and cementitions compositions compri sing the same

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

Corrosion inhibiting formulations with calcium nitrite

An admixture for cement compositions is provided which contributes both anodic and cathodic corrosion inhibition, and the cement compositions containing such additives. The cement additive is a combination of an anodic corrosion inhibitor such as calcium nitrite, and a cathodic corrosion inhibitor such as calcium stearate or other fatty acid. The mixed inhibitors in accordance with the invention provide as good or better corrosion inhibition than does calcium nitrite when used alone.

Improved cement admixture product having improved rheological properties and process of forming same

Process for the mineralization of carbon dioxide

The invention provides a process for the mineralization of carbon dioxide to form a magnesium carbonate compound, which process comprises contacting the carbon dioxide, in the free form, or in the form of an alkali metal carbonate or bicarbonate, with an alkali metal magnesium silicate to produce the magnesium carbonate compound.

Improved cement admixture product having improved rheological properties and process of forming same

The present invention is directed to an imidized polycarboxylic acid polymer useful as a cement admixture, to improved cement compositions containing said polymer and to a process of forming the same.

Sulfite sulfoaluminous binder

Aglutinante hidráulico que comprende un clínker sulfoaluminoso belítico y sílice que tiene una superficie específica BET bajo nitrógeno de por lo menos 50 m²/g, la cantidad de sílice varía del 0,5 al 3%, porcentaje expresado en masa con respecto a la masa de aglutinante. Hydraulic binder comprising a belite sulphoaluminous clinker and silica having a BET specific surface under nitrogen of at least 50 m²/g, the amount of silica varies from 0.5 to 3%, percentage expressed by mass with respect to the mass of binder.

Improved cement admixture product having improved rheological properties and process of forming same

The present invention is directed to an imidized polycarboxylic acid polymer useful as a cement admixture, to improved cement compositions containing said polymer and to a process of forming the same.

High belite-containing sulfoaluminous clinker, method for the production and the use thereof for preparing hydraulic binders.

An improved rice hull ash concrete admixture.

A CEMENT ADMIXTURE AND CEMENT COMPOSITION CONTAINING SAID ADMIXTURE COMPRISING FINELY GROUND RICE HULL ASH FORMED BY SLURRY GRINDING OF SAID ASH TO A VOLUME MEDIUM PARTICLE DIAMETER OF UP TO 4 MICROMETERS.

Drying shrinkage cement admixture

A cement admixture composed of a low molecular weight oxyalkylene compound and a comb polymer having carboxylic acid groups and oxyalkylene units therein.

High-belite-containing sulphoaluminous clinker, method for the production and the use thereof for preparing hydraulic binders

THE PRESENT INVENTION CONCERNS A BELITE-RICH SULPHOALUMINOUS CLINKER, A METHOD FOR PRODUCING SUCH A CLINKER AND ITS USE FOR PREPARING HYDRAULIC BINDERS, AND COMPRISING AS A MINERALOGICAL FORMULATION: - 5 TO 25%, PREFERABLY 10 TO 20%, OF A CALCIUM ALUMINOFERRITE PHASE WITH A FORMULATION CORRESPONDING TO THE GENERAL FORMULA C2AXF(1-X), WITH X COMPRISED BETWEEN 0.2 AND 0.8. - 15 TO 35%, PREFERABLY 20 TO 30%, OF A CALCIUM SULPHOALUMINATE PHASE "YEE' LIMIT" (C4A3$), - 40 TO 75%, PREFERABLY 45 TO 65% BELITE (C2S), - FROM 0.01 TO 10% OF ONE OR SEVERAL MINOR PHASES SELECTED FROM CALCIUM SULPHATES, ALKALINE SULPHATES, PEROVSKITE, CALCIUM ALUMINATES, GEHLENITE, FREE LIMESTONE AND PERICLASE, AND/OR A VITREOUS PHASE, - AND AT LEAST ONE OR SEVERAL SECONDARY ELEMENTS SELECTED FROM SULPHUR, MAGNESIUM, SODIUM, POTASSIUM, BORON, PHOSPHORUS, ZINC, MANGANESE, TITANIUM, FLUORINE, CHLORINE, THE TOTAL CONTENT OF THESE SECONDARY ELEMENTS BEING LESS THAN OR EQUAL TO 15%.

Cement shrinkage reducing agent and method for obtaining cement based articles having reduced shrinkage

The invention relates to a composition comprising a hydraulic binder, a low molecular weight glycol having the formula C n H2n (OH)2 wherein n is an integer from 2 to 10, preferably 2 to 9,, and a fluorinated surfactant capable of reducing the surface tension of pure water to a value below 30 mN/m at a concentration of 1% or less. The invention also relates to a wet mortar or concrete composition comprising a hydraulic binder, a low molecular weight glycol having the formula C n H2n (OH)2 wherein n is an integer from 2 to 10, preferably 2 to 9,, and a fluorinated fluorinated surfactant capable of reducing the surface tension of pure water to a value below 30 mN/m at a dosage of 1% or less, water and sand and/or aggregates and/or fillers. The invention also relates to a method for preparing same.

Improved cement additive product with improved rheological properties, as well as method of preparation thereof

High early-strength-enhancing admixture for precast hydraulic cement and compositions containing same

A high early-strength admixture for precast hydraulic cement comprises a calcium salt and a copolymer having a carbon-containing backbone to which are attached cement-anchoring members, such as carboxyl groups, and to which are also attached oxyalkylene pendant groups by linkages selected from the group consisting of amide and imide members. The copolymers used are preferably formed by reacting an acrylic polymer with ammonia or an alkoxylated amine. The calcium salt, preferably calcium nitrite, and the copolymer can added simultaneously as one admixture, or separately. The invention relates also to methods for enhancing high early strength in concrete, cement, masonry, and mortar mixtures generally, and to precast concrete particularly, and also pertains to such hydraulic mixtures containing the calcium salt and copolymer.

High early-strength-enhancing admixture for precast hydraulic cement and compositions containing same

A high early-strength admixture for precast hydraulic cement comprises a calcium salt and a copolymer having a carbon-containing backbone to which ar e attached cement-anchoring members, such as carboxyl groups, and to which are also attached oxyalkylene pendant groups by linkages selected from the group consisting of amide and imide members. The copolymers used are preferably formed by reacting an acrylic polymer with ammonia or an alkoxylated amine. The calcium salt, preferably calcium nitrite, and the copolymer can added simultaneously as one admixture, or separately. The invention relates also t o methods for enhancing high early strength in concrete, cement, masonry, and mortar mixtures generally, and to precast concrete particularly, and also pertains to such hydraulic mixtures containing the calcium salt and copolyme r.

High belite-containing sulfoaluminous clinker, method for the production and the use thereof for preparing hydraulic binders.

L'invention concerne un clinker bélite-sulfoalumineux, à son procédé de fabrication et à son utilisation pour la préparation de liants hydrauliques, et comprenant comme composition minéralogique : - 5 à 25%, préférentiellemen t 10 à 20%, de phase aluminoferrite calcique d'une composition correspondant à la formule générale C2AXF(1-X), avec X compris entre 0,2 et 0,8. - 15 à 35%, préférentiellement 20 à 30%, de phase sulfoaluminate de calcium « yee' limit e » (C4A3$), - 40 à 75%, préférentiellement 45 à 65% bélite (C2S), - de 0,01 à 10% d'une ou plusieurs phases mineures choisies parmi les sulfates de calciu m, les sulfates alcalins, la perovskite, les aluminates de calcium, la géhlénit e, la chaux libre et la périclase, et/ou une phase vitreuse, - et au moins un élément secondaire choisi parmi le soufre, le magnésium, le sodium, le potassium, le bore, le phosphore, le zinc, le manganèse, le titane, le fluor , le chlore, la teneur totale desdits éléments secondaires étant inférieure ou égale à 15%. The invention relates to a belite-sulphoaluminous clinker, to its method of manufacture and to its use for the preparation of hydraulic binders, and comprising as mineralogical composition: 5 to 25%, preferably 10 to 20%, of calcium aluminoferrite phase; a composition corresponding to the general formula C2AXF (1-X), with X ranging from 0.2 to 0.8. 15 to 35%, preferably 20 to 30%, calcium sulphoaluminate phase "yee 'limited" (C4A3 $), - 40 to 75%, preferably 45 to 65% belite (C2S), - from 0.01 to 10% of one or more minor phases selected from calcium sulphates, alkali sulphates, perovskite, calcium aluminates, gehlenite, free lime and periclase, and / or a glassy phase, and at least one secondary element selected from sulfur, magnesium, sodium, potassium, boron, phosphorus, zinc, manganese, titanium, fluorine, chlorine, the total content of said secondary elements being less than or equal to 15%.

High belite-containing sulfoaluminous clinker, method for the production and the use thereof for preparing hydraulic binders.

The invention relates to a belite-sulfoaluminous clinker, to a method for the Production and the use thereof for preparing hydraulic binders comprising the following mineralogical composition: 5 to 35 %, preferably 10 to 20 % a calcium aluminoferrite phase whose composition corresponds to a general formula C2AXF(1-X), wherein X ranges from 0.2 to 0.8, 15 to 35 %, preferably 20 to 30 % a calcium sulphoaluminate phase “yee' limite” (C4A3$), 40 to 75 %, preferably 45 to 65 % belite (C2S), 0.1 to 10 % one or several mineral phases selected form calcium sulphates, alkali sulphates, perovskite, calcium aluminates, gehlenite, free lime, periclase and/or a vitreous phase and at least a secondary element selected from sulfur, magnesium, sodium, potassium, boron, phosphorus, zinc, manganese, titanium, fluorine, chlorine, wherein the total content of said secondary elements is equal to or less than 15 %.

Additives for cement

La présente invention concerne une composition de ciment de bélite-sulfoaluminate de calcium-ferrite (bcsaf) comprenant : un mâchefer bcsaf, ledit mâchefer ayant la composition minéralogique suivante, sur la base du poids total du mâchefer : de 5 à 25 %, de préférence de 10 à 20 %, d'une phase d'aluminoferrite de calcium ayant la formule générale c2axf(1-x), dans laquelle x est de 0,2 à 0,8 ; de 15 à 35 % d'une phase de sulfoaluminate de calcium ; de 40 à 75 % de bélite (c2s) ; de 0,01 à 10 % au total d'une ou plusieurs phases mineures choisies parmi des sulfates de calcium, des sulfates de métal alcalin, la pérovskite, des aluminates de calcium, la gehlénite, la chaux libre et la périclase et/ou une phase vitreuse ; et une alcanolamine. The present invention relates to a calcium-ferrite biselosulfonaluminate cementitious (bcsaf) composition comprising: a bcsaf slag, said slag having the following mineralogical composition, based on the total weight of the slag: from 5 to 25%, preferably from 10 to 20%, of a calcium aluminoferrite phase having the general formula c2axf (1-x), wherein x is from 0.2 to 0.8; from 15 to 35% of a calcium sulfoaluminate phase; from 40 to 75% belite (c2s); from 0.01 to 10% in total of one or more minor phases selected from calcium sulphates, alkali metal sulphates, perovskite, calcium aluminates, gehlenite, free lime and periclase and / or vitreous phase; and an alkanolamine.

An improved rice hull ash concrete admixture

The invention relates to compositions and aqueous suspensions comprising rice hull ash having a volume median particle diameter measured by laser light scattering of up to about 4 micrometers and a cement water-reducing agent, and to their use in hydraulic cement compositions.

High belite-containing sulfoaluminous clinker, method for the production and the use thereof for preparing hydraulic binders.

L'invention concerne un clinker bélite-sulfoalumineux, à son procédé de fabrication et à son utilisation pour la préparation de liants hydrauliques, et comprenant comme composition minéralogique : - 5 à 25%, préférentiellement 10 à 20%, de phase aluminoferrite calcique d'une composition correspondant à la formule générale C2AXF(1-X), avec X compris entre 0,2 et 0,8. - 15 à 35%, préférentiellement 20 à 30%, de phase sulfoaluminate de calcium « yee' limite » (C4A3$), - 40 à 75%, préférentiellement 45 à 65% bélite (C2S), - de 0,01 à 10% d'une ou plusieurs phases mineures choisies parmi les sulfates de calcium, les sulfates alcalins, la perovskite, les aluminates de calcium, la géhlénite, la chaux libre et la périclase, et/ou une phase vitreuse, - et au moins un élément secondaire choisi parmi le soufre, le magnésium, le sodium, le potassium, le bore, le phosphore, le zinc, le manganèse, le titane, le fluor, le chlore, la teneur totale desdits éléments secondaires étant inférieure ou égale à 15%.

BELIVE SULFOALUMINOUS BINDER

La présente invention se rapporte à un liant hydraulique comprenant un clinker sulfoalumineux bélitique et de la silice ayant une surface spécifique BET sous azote d'au moins 50 m2/g, la quantité de silice étant inférieure ou égale à 5 %, pourcentage exprimé en masse par rapport à la masse de liant.

An improved rice hull ash concrete admixture

Cement admixture product

The present invention is directed to a polyoxyalkylene ammonium salt of an imidized polycarboxylic acid polymer cement admixture, storage stable aqueous solutions of said polymer, and to improved cement compositions containing said polymer.

Hydraulic binder based on sulfoaluminous clinker and on portland clinker

Hydraulic cement set accelerators based on nitroalcohols

Hydraulic cement set-accelerating admixture compositions; cement compositions containing such admixtures; and methods for preparing said cement compositions. The admixture compositions comprise one or more nitroalcohols present in an amount effective to increase the set acceleration of a hydraulic cement composition. The invention further relates to a method of making a hydraulic cement composition comprising adding to a cement composition comprising a hydraulic cement binder, a nitroalcohol component in an amount effective to increase the set-acceleration of the binder, and to a cement composition comprising a hydraulic cement binder and a nitroalcohol setaccelerating agent.

Zementschwundverringerungsmittel und verfahren zur herstellung von zementbasierten artikeln mit verringertem schwund

Sulfoaluminatklinker mit hohem belitanteil, verfahren zu dessen herstellung sowie verwendung für die herstellung von hydraulischen bindemitteln