Admixture for cement mortar having crack resistance and cement mortar including the same

An admixture for a cement mortar and a cement mortar including the same. The admixture includes at least one of hydroxyethylmethyl cellulose having a degree of substitution (DS) of a methyl group in a range from 1.6 to 2.0 and hydroxypropylmethyl cellulose having a molar substitution MS of a hydroxypropyl group in a range from 0.4 to 1.0.

Highly concentrated nano-reinforcement suspensions for cementitious materials and method of reinforcing such materials

Highly concentrated carbon nanotube or other nano-reinforcement suspensions and/or masses are prepared for use as admixtures in cement base materials to make cementitious composite materials.

Low-Shrinkage Binder System

The invention relates to mixtures containing alkali-activatable aluminosilicate binders, characterized in that the mixture contains organosiloxane compounds, to the use of organosiloxane compounds for reducing shrinkage in alkali-activatable aluminosilicate binders and to the use for hydrophobization of alkali-activatable aluminosilicate binders. The invention furthermore relates to joint mortars, levelling compounds or coatings which contain the mixtures according to the invention.

Inorganic board and inorganic board production method

An inorganic board is obtained by extrusion molding of raw material composition, contains cement and silica-containing material in weight ratio ranging from 45:55 to 55:45, contains 3 to 8 wt %, with respect to total solids, of organic fibers. In the inorganic board, specific gravity ranges from 1.4 to 2.0, flexural strength is not lower than 20 N/mm 2 , dimensional change rate upon ten-day moisture release at 80° C. is not greater than 0.1%, dimensional change rate upon seven-day moisture absorption is not greater than 0.1%, seven-day dimensional change rate in an environment having carbon dioxide concentration of 5% is not greater than 0.1%. A method for producing the inorganic board comprises the steps of producing raw material composition that comprises cement, silica-containing material and organic fibers; producing mat by extrusion molding of the raw material composition; and subjecting the mat to autoclave curing at 140 to 200° C.

Shrinkage-reducing agent for hydraulic material

Provided is a shrinkage-reducing agent for a hydraulic material, which does not require a combination with any other admixture, is inexpensive, and is capable of suppressing a reduction in strength of a hardened concrete material, suppressing generation of a crack in a hardened concrete material by virtue of its excellent shrinkage-reducing ability, and imparting excellent freeze-thaw resistance. The shrinkage-reducing agent for a hydraulic material includes at least one kind of polyoxyalkylene compound (A) as an essential component, in which a concrete or a mortar produced by using the shrinkage-reducing agent for a hydraulic material has a spacing factor of 350 μm or less.

Low weight and density fire-resistant gypsum panel

An about ⅝ inch to ¾ inch thick low weight, low density gypsum panel with fire resistance capabilities sufficient to provide a Thermal Insulation Index of at least 17.0 minutes which when subjected to U419 test procedures will not fail for at least 30 minutes and, in selected embodiments, also has outstanding water resistance properties.

METHOD FOR IMPROVING CEMENT TOUGHNESS

This document relates to methods for providing long-term zonal isolation in oil wells using cement compositions that contain triazine-based polymeric additives. The cement compositions containing the polymeric additives exhibit increased tensile strength, elastic strength, or both, without suffering a decrease in compressive strength, as compared to the same cement without the polymeric additive. 6. The method of claim 1 , wherein the amount of polymeric additive in the cement composition is between about 0.1% to about 10% by weight of the cement.7. The method of claim 6 , wherein the amount of polymeric additive in the cement composition is about 3% by weight of the cement.8. The method of claim 1 , wherein the cement composition further comprises one or more of a suspending agent claim 1 , a neutralizing agent claim 1 , and a reaction propagating agent.9. The method of claim 8 , wherein the one or more suspending agent claim 8 , neutralizing agent claim 8 , and reaction propagating agent are selected from the group consisting of N claim 8 ,N-diisopropylethylamine claim 8 , triethylamine claim 8 , trimethylamine claim 8 , sodium hydroxide claim 8 , potassium hydroxide claim 8 , sodium carbonate claim 8 , and potassium carbonate.10. The method of claim 1 , wherein the cement composition further comprises water.11. The method of claim 1 , wherein the cement composition has a Young's modulus of about 0.1 GPa to about 40 GPa claim 1 , about 3 GPa to about 25 GPa claim 1 , or about 5 GPa to about 20 GPa at a pressure of about 0.1 MPa to about 150 MPa claim 1 , about 10 MPa to about 100 MPa claim 1 , or about 20 MPa to about 40 MPa claim 1 , at a temperature of about 77° F. to about 450° F. claim 1 , about 125° F. to about 350° F. claim 1 , or about 150° F. to about 200° F.12. The method of claim 11 , wherein the cement composition has a Young's modulus of about 5 GPa to about 10 GPa at a pressure of about 20 MPa and a temperature of about 180° F.13. The method of claim ...

QUICK-DRYING BUILDING MATERIAL COMPOSITION BASED ON A MINERAL HYBRID BINDER

A quick-drying gypsum composition, in particular for use as gypsum filling compound and for the production of floor coverings, wherein the gypsum composition contains 20 to 70% of a mixture of calcium aluminate and calcium sulfate hemihydrate and/or anhydrite and/or calcium sulfate dihydrate as hydraulic binders and 30 to 80% by weight of fillers, and wherein the weight ratio of calcium aluminate to calcium sulfate hemihydrate and/or anhydrite and/or calcium sulfate dihydrate binders lies in the range from 1:1 to 1:5. Gypsum compositions of this type are characterized by a particularly beneficial shrinkage behavior, such that stresses and cracks in the dried composition can be avoided. At the same time, the gypsum compositions dry to readiness for covering in a time that is compatible with conventional cement filling compounds. 2. The gypsum composition as claimed in claim 1 , wherein the weight ratio of calcium aluminate to calcium sulfate hemihydrate and/or anhydrite and/or calcium sulfate dihydrate binder is in the range from 1:1.6 to 1:4.3. The gypsum composition as claimed in claim 1 , comprises 20 to 60 wt % claim 1 , of the mixture of calcium aluminate and calcium sulfate hemihydrate and/or anhydrite and/or calcium sulfate dihydrate binder.4. The gypsum composition as claimed in claim 1 , comprises fillers in the form of sand and calcium carbonate and/or finely ground limestone.5. The gypsum composition as claimed in claim 1 , wherein it has a fillers content of 35 to 75 wt %.6. The gypsum composition as claimed in claim 1 , further comprises a lithium salt.7. The gypsum composition as claimed in claim 6 , comprises lithium salts.8. The gypsum composition as claimed in claim 1 , further comprises tartaric acid and/or a tartaric salt.9. The gypsum composition as claimed in claim 8 , comprises tartaric acid or and/or a tartaric salt in an amount of 0.15 to 0.005 wt %.10. The gypsum composition as claimed in claim 1 , wherein it comprises additional additives ...

Concrete-forming composition

A concrete-forming composition for producing a concrete article including: (a) at least one internal curing agent including a water-insoluble crosslinked cellulose ether wherein the water-insoluble crosslinked cellulose ether has a higher water adsorption capacity compared to typically used superabsorbent polymers and wherein the water-insoluble crosslinked cellulose ether can be successfully and efficiently used as a water-insoluble crosslinked cellulose either internal curing agent in concrete-forming compositions; and (b) a cementitious material; a process for making the above concrete-forming composition; and a concrete article made from the above concrete-forming composition with the objective of reducing autogenous shrinkage and crack formation in the resulting concrete article made from the above concrete-forming composition.

GYPSUM BUILDING MATERIAL WITH IMPROVED HIGH-TEMPERATURE RESISTANCE

A gypsum building material, characterised in that the gypsum building material comprises at least gypsum, H-siloxane and/or amorphous silicon dioxide and optionally further additives, wherein the H-siloxane is uniformly distributed in the gypsum building material and/or is applied to at least one surface of the gypsum building material, characterised in that the gypsum building material under the effect of temperatures of at least 80° C. has a longer expansion phase than a gypsum building material without H-siloxane and/or amorphous silicon dioxide, wherein the gypsum building material is otherwise of identical composition. 1. A gypsum building material comprising at least gypsum , an H-siloxane and/or an amorphous silicon dioxide , wherein the H-siloxane is uniformly distributed in the gypsum building material and/or is applied to at least one surface of the gypsum building material , wherein the gypsum building material under an effect of temperatures of at least 80° C. has a longer expansion phase than another gypsum building material without the H-siloxane and/or the amorphous silicon dioxide , wherein the other gypsum building material is otherwise of an identical composition.2. The gypsum building material according to claim 1 , wherein the expansion phase of the gypsum building material is at least 1.2 times a time of the expansion phase of the other gypsum building material of the identical composition but without the H-siloxane or the amorphous silicon dioxide.3. The gypsum building material according to claim 1 , wherein the gypsum building material under the effect of temperature in accordance with a temperature/time curve according to DIN EN 1363-1: 2012-10 for a first 60 min. and under constantly 950° C. during a next 60 min. has a smaller degree of shrinkage than the other gypsum building material of the identical composition claim 1 , but without the H-siloxane and/or the amorphous silicon dioxide.4. The gypsum building material according to claim 3 , ...

Polymer fibers for concrete reinforcement

Provided are cementitious mixtures and processes for reinforcing a cementitious matrix. In one form of the process for reinforcing a cementitious matrix includes the steps of mixing a mineral cement and one or more populations of synthetic copolymer microfibers including about 1 mol. % to about 25 mol. % and from about 75 mol. % to about 99.5 mol. % of propylene monomeric units.

Cementitious inorganic material containing cellulosic nanofibers

A cementitious inorganic material having improved durability and strength is provided. The cementitious inorganic material includes an inorganic cured matrix, a plurality of cellulosic nanofibers embedded in the inorganic cured matrix, an agent for dispersing the cellulosic nanofibers in the inorganic cured matrix, and an aggregate dispersed throughout the inorganic cured matrix. The inventive cementitious inorganic material provides improved resistance to sulphate attack, chloride attack, vegetation growth, and consequent damage such as expansive cracking, thereby enhancing the durability of cement. A process of making the cementitious inorganic material includes blending the cellulosic nanofibers with water until a homogenous solution is achieved, mixing the dispersing agent with the homogenous mixture, mixing the inorganic matrix material with the homogenous solution, mixing in the aggregate, and allowing the mixture to cure.

MODIFIED OXYALKILAMINES AS SHRINKAGE REDUCING AGENTS IN CEMENTITIOUS COMPOSITIONS

An adduct of a polyetheramine and an epoxy-containing compound is used as an agent for reducing drying shrinkage and/or drying cracking in a mineral binder composition. 1. A method comprising: obtaining an adduct of a polyetheramine and an epoxy-containing compound as an agent for reducing drying shrinkage and/or for reducing drying cracking in a mineral binder composition: adding the adduct to the mineral binder composition; and drying and/or hardening the mineral binder composition.2. The method according to claim 1 , wherein the polyetheramine comprises an amine terminated poly(alkylene oxide).3. The method according to claim 1 , wherein a molecular weight Mw of the polyetheramine is from 100-10 claim 1 ,000 g/mol.4. The method according to claim 1 , wherein the epoxy-containing substance comprises a glycidyl ether.5. The method according to claim 1 , wherein the epoxy-containing substance comprises diglycidyl ether and/or a triglycidyl ether.6. The method according to claim 1 , wherein a molecular weight of the epoxy-containing compound is from 50-2 claim 1 ,000 g/mol.7. The method according to claim 1 , wherein the polyetheramine comprises a poly(propylene oxide) diamine and the epoxy-containing substance comprises a diglycidyl ether of an aliphatic diol.8. The method according to claim 1 , wherein in the adduct claim 1 , an amine group of the polyetheramine and an epoxide group of the epoxy-containing substance are connected in the form of an amino alcohol group.9. The method according to claim 1 , wherein in the adduct claim 1 , a molar proportion of the polyetheramine to the epoxy-containing substance is in the range of from 1.5:1-2.5:1.10. The method according to claim 1 , wherein the adduct is a part of a composition comprising free or unreacted polyetheramine that is added to the mineral binder composition.11. A method for producing an agent for reducing drying shrinkage and/or for reducing drying cracking claim 1 , the method comprising forming an adduct ...

CRACK SELF-HEALING AGENT FOR CEMENT-BASED MATERIALS CAPABLE OF BINDING CORROSIVE IONS IN SEAWATER, AND PREPARATION METHOD THEREOF

Disclosed are a crack self-healing agent for cement-based materials capable of binding corrosive ions in seawater, and a preparation method thereof. A core material of the agent is an active inorganic composite component capable of chemically binding Cl, Mg, and S, a wall layer is polymethyl methacrylate, and an interface improvement layer is a cement layer. A preparation method includes: (1) thoroughly mixing active components capable of binding corrosive ions, and filling a resulting mixture into a direct compression mold; (2) applying a pressure to the direct compression mold and holding the pressure on using a pressing machine, and demolding to obtain a core material body; (3) placing the core material body obtained in a solution of PMMA in acetone for coating, and taking out the core material body and drying; (4) coating a layer of cement before the acetone is completely volatilized to obtain the crack self-healing agent.

Fiber Reinforced Cement

Provided herein are fiber reinforced cementitious materials and mixtures with increased crack resistance. The cementitious materials and mixtures include a cement and at least one carbon fiber. Also provide is a fiber reinforced cementitious mortar that includes the fiber reinforced cementitious material to which at least one of water, an aggregate material or a chemical admixture is added.

Artificial Stone Construction Material and Method of Making

An artificial stone building tile and method. Disclosed is an artificial stone building tile and a method of making the building tile. The building tile has a low density and significant flexibility, and is nailable without cracking. It is made by layers of cement formulations separated by layers of metal mesh. Color batches of cement are prepared and placed in the bottom of a mold, with the color batches becoming the visible face of the building tile. 1. An artificial stone building slab comprising:a color layer made up of at least one colored cement mix, comprised of stone powder, cement, pigment and a glue, the color layer configured for placement on a vertical wall surface facing away from the vertical wall surface;a metal mesh layer embedded between the color layer and a backing layer;the backing layer adjacent to the metal mesh layer, configured for placement against the vertical wall and made up of a stone mix comprised of half stone powder and half stone pieces less than ⅛ inch in size; andwith the artificial stone building slab having flexibility to allow at least 1¼ inches of flex in a 48-inch piece, and a density of approximately 4 pounds per square foot, and a hardness of greater than Mohr 3 to allow sanding of the slab, and the slab being sufficiently resilient to allow nailing without cracking.2. The artificial stone building slab of in which the color layer is comprised of 45 units of stone powder and 25 units of cement.3. The artificial stone building slab of in which the stone powder is selected from the group consisting of marble powder claim 1 , granite powder claim 1 , pumice powder claim 1 , quartz powder claim 1 , and chalk.4. The artificial stone building slab of which further comprises a second metal mesh layer against the backing layer claim 1 , and a second backing layer over the second metal mesh layer.5. An artificial stone comprising:a color layer comprising a stone powder, a cement, a pigment and a glue, the stone powder of the color ...

Advanced fiber reinforced concrete mix designs and admixtures systems

A concrete mix having sand, fine aggregates, binder, fibers, and various admixtures is provided. The mix has a consistency from S2 to SF3, a compressive strength in the range of 30-80 MPa and a ductility represented by fc, ffl, fR1 and fR3 values, wherein the concrete mix contains at least 390 Kg of binder, the concrete mix has a paste volume of 300-600 liters, the concrete mix contains at least two systems of fibers and a general admixture system that is composed of at least 2 sub-admixture systems.

Asphalt Cement Concrete Interlayer System for Reflective Crack Relief

An asphalt-cement concrete (“ACC”) interlayer formed of a plant-mix material reinforced with aramid fibers, deposited at a thickness of at least one inch (1″) over a Portland-cement concrete (“PCC”) or ACC base, can extend the service life of a hot-mix asphalt (“HMA”) surface layer installed over the interlayer by retarding or preventing “reflected” cracks—cracks in the surface layer that correspond to cracks, damage and irregularities in the PCC or ACC base. When the surface layer's useable life has expired, it can be removed and replaced, and the interlayer can continue to protect the new surface layer.

Low weight and density fire-resistant gypsum panel

An about ⅝ inch to ¾ inch thick low weight, low density gypsum panel with fire resistance capabilities sufficient to provide a Thermal Insulation Index of at least 17.0 minutes which when subjected to U419 test procedures will not fail for at least 30 minutes and, in selected embodiments, also has outstanding water resistance properties.

Multi-leg fiber reinforced concrete

The multi-leg fiber reinforced concrete is concrete in which fibers have been embedded to prevent the concrete from being fractured due to cracks developing therein. Each fiber has multiple legs, defining two and three dimensional structures. At least one fiber is embedded in a volume of concrete, where the at least one fiber has at least first and second legs respectively extending along first and second directions. The first and second directions are angularly oriented with respect to one another between 45° and 135°, with each of the first and second legs having a free end and a fixed end. Each free end has a substantially Z-shaped contour. The fixed ends of the first and second legs may be joined together to define a two-dimensional fiber structure. The at least one fiber may be partially coated with a polymeric material, such as polypropylene.

ADVANCED FIBER REINFORCED CONCRETE MIX DESIGNS

A concrete mix having sand, fine aggregates, binder, fibers, and various admixtures is provided. The mix has a consistency from S2 to SF3, a compressive strength in the range of 30-60 MPa and a ductility represented by fc, ffl, fR1 and fR3 values, wherein the concrete mix contains at least 390 Kg of binder, the concrete mix has a paste volume of 300-600 liters, the concrete mix contains at least two systems of fibers and a general admixture system that is composed of at least 2 sub-admixture systems. 1. A concrete mix comprising sand , fine aggregates , binder , fibers , and various admixtures , having a consistency from S2 to SF3 , a compressive strength in the range of 30-60 Mpa and a ductility represented by the following values:30 Подробнее

GLASS CERAMIC HAVING SPECIFIC THERMAL EXPANSION CHARACTERISTICS

The present invention relates to a glass ceramic having improved thermal expansion characteristics and to the use thereof in a precision component. 2. LAS glass ceramic according to claim 1 , further containing AlOin a content of 10 to 22 mol % and/or POin a content of 0.1 to 6 mol %.3. LAS glass ceramic according to claim 1 , wherein the content of the sum of ZnO+MgO is ≤0.55 mol % and/or the content of MgO is ≤0.35 mol % and/or the content of ZnO is <0.5 mol %.4. LAS glass ceramic according to claim 1 , wherein the content of the sum of ZnO+MgO is ≤0.5 mol %.5. LAS glass ceramic according to claim 1 , wherein the content of SiOis 60 to ≤70 mol %.6. LAS glass ceramic according to claim 1 , wherein the content of the sum of RO (CaO+BaO+SrO) is ≥0.1 mol % and/or ≤6 mol %.7. LAS glass ceramic according to claim 1 , wherein the content of the sum of RO (NaO+KO+CsO+RbO) is ≥0.1 mol % and/or ≤6 mol %.8. LAS glass ceramic according to claim 1 , wherein the content of the sum of nucleating agent is ≥2 mol % and/or ≤5 mol %.9. LAS glass ceramic according to claim 1 , wherein the following condition is applicable: molar content of SiO+(5×molar content of LiO)≥106 and/or{'sub': 2', '2, 'wherein the following condition is applicable: molar content of SiO+(5×molar content of LiO)≤115.5.'}10. LAS glass ceramic according to claim 1 , wherein a processing temperature Va is not more than 1330° C.11. LAS glass ceramic according to claim 1 , wherein a main crystal phase is high quartz solid solution claim 1 , and/or the average crystallite size of the high quartz solid solution is <100 nm and/or a crystal phase content is less than 70% by volume.12. LAS glass ceramic according to claim 1 , wherein an index F is <1.2 claim 1 , where F=TCL (0; 50° C.)/|expansion (0; 50° C.)|.13. LAS glass ceramic according to claim 1 , wherein an alternative index fis <0.024 ppm/K and/or an alternative index fis <0.039 ppm/K and/or an alternative index fis <0.015 ppm/K.14. LAS glass ceramic according ...

ENHANCEMENT OF REINFORCING FIBERS, THEIR APPLICATIONS, AND METHODS OF MAKING SAME

The invention relates to composite reinforcing fibers infused or compounded with pulp fibers and/or nano-fibers. The composite reinforcing fibers are composed of polymer, e.g., polymer resin. The pulp fibers and/or nano-fibers impart improved tensile strength to the composite reinforcing fibers, as well as a resulting product formed by the fibers. The composite reinforcing fibers may be used in a variety of cementitious applications, wherein traditional reinforcing fibers are typically used. 1. A method of preparing a composite reinforcing fiber , comprising:obtaining a synthetic polymer resin;compounding the synthetic polymer resin with a fiber component selected from the group consisting of pulp fiber, nano-fiber and mixtures thereof;forming a resin/fiber blend;melting the resin/fiber blend; andextruding the resin/fiber blend to form the composite reinforcing fiber.2. The method of claim 1 , further comprising compounding the fiber component with a water soluble resin prior to compounding the synthetic polymer resin with the fiber component.3. The method of claim 2 , further comprising extruding the fiber component with the water soluble resin and creating a master batch in pellet form.4. The method of claim 2 , wherein the water soluble resin is selected from the group consisting of polyethylene claim 2 , polypropylene and mixtures thereof.5. The method of claim 1 , wherein the melting of the resin/fiber blend is conducted in an extruder barrel and screw. This divisional patent application claims priority from U.S. patent application Ser. No. 15/700,261, filed on Sep. 11, 2017, which claims priority from provisional patent application No. 62/385,410, entitled “ENHANCEMENT OF REINFORCING FIBERS, THEIR APPLICATIONS, AND METHODS OF MAKING SAME”, filed on Sep. 9, 2016, the contents of which are incorporated herein by reference.The invention generally relates to reinforcing fibers for cementitious applications and, more particularly, to reinforcing fibers that are ...

GEOPOLYMER FOAM FORMULATION FOR A NON-FLAMMABLE, SOUND-ABSORBING, THERMALLY INSULATING GEOPOLYMER FOAM ELEMENT

A geopolymer foam formulation, comprising at least one inorganic binder comprising metakaolin; at least one alkaline activator selected from the group consisting of alkali metal hydroxides, alkali metal carbonates, alkali metal aluminates, alkali metal silicates and mixtures thereof; at least one alkyl-polyglucoside surfactant; a gas phase and water. This formulation can also comprise a cement, and also additives for foam stabilization, shrinkage reduction, flexibilization, hydrophobization, or dispersion, fibres and fillers or a mixture thereof, and can be a single-component or two-component formulation. An incombustible, sound-absorbing, thermally insulating geopolymer foam element. 1. A geopolymer foam formulation comprising:at least one inorganic binder comprising metakaolin;at least one alkaline activator selected from the group consisting of alkali metal hydroxides, alkali metal carbonates, alkali metal aluminates, alkali metal silicates and mixtures thereof;at least one alkyl polyglucoside surfactant;a gas phase andwater.2. The formulation according to claim 1 , wherein the inorganic binder comprises metakaolin and fly ash.3. The formulation according to claim 1 , wherein the inorganic binder comprises metakaolin claim 1 , blast furnace slag and microsilica.4. The formulation according to claim 1 , wherein the alkaline activator is selected from alkali metal hydroxides of the formula MOH; alkali metal silicates of the formula m SiO.n MO; and a mixture of alkali metal hydroxides and of alkali metal silicates; where M is the alkali metal claim 1 , Li claim 1 , Na claim 1 , or K or a mixture thereof claim 1 , and the molar ratio m:n is ≤4.0.5. The formulation according to claim 1 , wherein the alkyl polyglucoside has the formula H—(CHO)—O—R claim 1 , where (CHO) is a glucose unit and Ris a C-alkyl group claim 1 , and m=from 1 to 5.6. The formulation according to claim 1 , wherein the formulation comprisesfrom 20 to 75% by weight of inorganic binder,from 1 to 55% ...

Cordierite membrane on a cordierite monolith

Described herein is a cordierite membrane coated on a monolith substrate formed from cordierite. The membrane coating is formed from cordierite particles which have been processed to have a median particle size diameter of between 1 and 3 microns with a narrow particle size distribution suitable for forming a cordierite membrane on a cordierite monolith substrate. After the cordierite membrane is formed on the cordierite monolith substrate, the cordierite membrane monolith has a pore size of less than 1 micron.

FIRE RESISTANT CALCIUM SULPHATE-BASED PRODUCTS

The present invention provides a calcium sulphate-based product (e.g. a wall board) comprising gypsum, a pozzolan source such as a clay additive, rice husk ash or diatomaceous earth and a metal salt additive. The product may be produced by drying an aqueous slurry comprising calcined gypsum, the pozzolan source and the metal salt additive. The clay additive may be a kaolinitic clay. The metal salt additive may be a magnesium salt e.g. magnesium nitrate, magnesium chloride or magnesium hydroxide. 1. A gypsum wallboard comprising:40 wt % or greater gypsum,a pozzolan source, anda metal salt additive, wherein:the metal salt additive is provided in an amount between 5 and 25 wt % based on the weight of the gypsum, pozzolan source and metal salt additive, andthe metal salt additive is a salt of magnesium, copper, zinc or aluminium.2. The wallboard according to claim 1 , whereinthe pozzolan source is a kaolinitic clay additive, andThe pozzolan source is included in an amount between 5 and 30 wt % based on the weight of the gypsum, clay additive and metal salt additive.3. The wallboard according to claim 2 , wherein the clay additive is included in an amount between 10 and 25 wt %.4. The wallboard according to claim 1 , whereinthe pozzolan source is rice husk ash or diatomaceous earth, andthe pozzolan source is included in an amount equal to or greater than 20 wt %.5. The wallboard according to claim 1 , wherein the metal salt is a nitrate claim 1 , carbonate claim 1 , hydrogen carbonate claim 1 , sulphate claim 1 , hydroxide or chloride.6. A gypsum wallboard comprising:40 wt % or greater of gypsum,a pozzolan source, anda metal salt, wherein:the metal salt additive is provided in an amount of 5-25 wt % based on the amount of calcined gypsum, pozzolan and metal salt additive, andthe metal salt additive is a metal hydroxide, a metal hydrogen carbonate, or a chloride of magnesium, copper, zinc or aluminium.7. The wallboard according to claim 6 , whereinthe pozzolan source is a ...

Fire Resistant Building Boards with Increased Amounts of Anti-Shrinkage Additives and Decreased Densities

Disclosed is a building board with increased heat and fire resistance. Boards constructed in accordance with this disclosure have lower densities while at the same time containing larger amounts of anti-shrinkage materials. In one embodiment, a board was constructed with a density of less than 1,750 lbs/msf while at the same time including anti-shrinkage additives in amounts greater than 14% by weight of the core material. The inventors have discovered that beneficial, and heretofore unexpected, levels of fire resistance can be achieved by using increased amounts of anti-shrinkage additives in lower density building boards.

Modified sulfur, method for preparing same, apparatus for preparing same, and use thereof

Disclosure relates to modified sulfur, preparation method thereof, preparation equipment thereof. The modified sulfur has spinnability or includes micro-structures such as fiber-, film- and network-like structure. The modified sulfur can be prepared by inducing polymerization with ultrasonic or ageing. The modified sulfur has various excellent features such as anticorrosiveness, waterproofing, strength, and fast drying and can control the features depending on its viscosity or polymerization degree. In addition due to the above features, the modified sulfur can be applied to anticorrosive or waterproofing material and can prepare anticorrosive or waterproofing material which has good workability, hardening, salt spray resistance, and weldability exceeding a certain level, and specially improved adhesiveness. Furthermore, when applying the modified sulfur to asphalt composition, gelation and depression are reduced, properties such as bending strength and tensile strength are improved, and it is possible to obtain asphalt composition with good working stability at RT.

Composition for joints

A composition based on calcium carbonate includes nanometric boehmite and/or nanometric aluminium trihydroxide. A coating can be obtained from this composition. This composition makes it possible to obtain products having better high-temperature dimensional stability.

METHOD FOR PRODUCING CEMENT WITH AN INTEGRATED CURING AGENT INCLUDED THEREIN AND THE USE THEREOF IN CEMENT-BASED MATERIALS AND THE CEMENT PRODUCED

A method to produce a cement with an integrated curing agent for concrete mixtures, mortars and other cement-based materials is disclosed. The method describes an integrated milling of all cement components (clinker, gypsum and other additives) and the curing agent, that will allow reducing the plastic shrinkage cracking on the casted elements that use this cement-based mix. 1. A method for producing a cement with an integrated curing agent , which comprises the following steps:a. jointly grinding the components of a cement, an integrated curing agent and tensioactive additives;b. dosing wet the curing agent;c. internally curing the cement-based resulting mixture.2. The method according to claim 1 , wherein said wet-dosed integrated curing agent is fed in a proportion of 0.05 to 10% of the total weight of the components of the cement.3. The method according to claim 1 , wherein said wet-dosed integrated curing agent contains cellulose fibres.4. The method according to claim 2 , wherein said wet-dosed integrated curing agent contains 40 to 70% water and 30 to 60% solid content claim 2 , both percentages by weight.5. The method according to claim 2 , wherein said wet-dosed integrated curing agent is jointly ground with the components of the cement down to cement production control fineness claim 2 , between 85 and 100% grain size less than 44 microns.6. The method according to claim 1 , wherein said tensioactive additives comprise at least one of the chemicals selected from the group consisting of triisobutyl phosphate claim 1 , polypropylene glycol claim 1 , silicone oil products and polydimethylsiloxane and mineral oils.7. The method according to claim 1 , wherein the dosage of said tensioactive additives are between 0.01 and 1% by weight of the total weight of the components of the cement.8. The method according to claim 2 , wherein said wet-dosed integrated curing agent is fed in a proportion of between 1 and 5% of the total weight of the components of the cement. ...

Extruded fiber reinforced cementitious products having wood-like properties and ultrahigh strength and methods for making the same

A method of manufacturing a cementitious composite including: (1) mixing an extrudable cementitious composition by first forming a fibrous mixture comprising fibers, water and a rheology modifying agent and then adding hydraulic cement; (2) extruding the extrudable cementitious composition into a green extrudate, wherein the green extrudate is characterized by being form-stable and retaining substantially a predefined cross-sectional shape; (3) removing a portion of the water by evaporation to reduce density and increase porosity; and (4) heating the green extrudate at a temperature from greater than 65° C. to less than 99° C. is disclosed. Such a process yields a cementitious composite that is suitable for use as a wood substitute. Particularly, by using higher curing temperatures for preparing the cementitious budding products, the building products have a lower bulk density and a higher flexural strength as compared to conventional products. The wood-like building products can be sawed, nailed and screwed like ordinary wood.

Mullite body and method of forming the mullite body

A mullite body comprising: a plurality of crystals, wherein about 70 percent or greater of the crystals have a crystal diameter that is within about 3 microns or less of an average diameter of the plurality of crystals, and a porosity of 55 percent or greater; and made using a process comprising: mixing precursor materials together with an average aggregate particle size of about 3 microns or smaller measured using a particle size analyzer; heating greenware in air to a first temperature such that the greenware is dried and forms calcineware, heating the calcineware in a silicon tetrafiouride atmosphere to form flurotopaz, and heating to a second temperature so that a mullite structure is formed.

ADDITIVE FOR CEMENT COMPOSITION AND CEMENT COMPOSITION

Provided is an additive for a cement composition capable of preparing the cement composition in which a cellulose being the additive can be uniformly dispersed into a cement matrix thereby enabling to suppress an increase in viscosity thereof, and capable of producing a cement structure having a less shrinkage strain (namely, a high reinforcing effect) and having a fine as well as homogeneous texture, and the additive for a cement composition includes powdery cellulose. 1. An additive for a cement composition , the additive comprising powdery cellulose.2. The additive for a cement composition according to claim 1 , wherein an average degree of polymerization of the powdery cellulose is 300 to 3 claim 1 ,000.3. The additive for a cement composition according to claim 1 , wherein an alkali elution rate of the powdery cellulose is 0.1 to 12.0%.5. The additive for a cement composition according to claim 4 , wherein the copolymer is at least any one of a copolymer (A1) having the constituent unit (I) and the constituent unit (II) claim 4 , and a copolymer (A2) having the constituent unit (I) claim 4 , the constituent unit (II) claim 4 , and the constituent unit (III).6. A cement composition claim 4 , comprising the additive of and a cement claim 4 , wherein an addition rate of the copolymer relative to a total weight of the cement is 0.01 to 5.0% by weight claim 4 , and an addition rate of the powdery cellulose relative to the total weight of the cement is 1 to 50% by weight.7. The additive for a cement composition according to claim 1 , wherein the powdery cellulose comprises powdery cellulose (B1) having an average degree of polymerization of 300 to less than 900 as well as an alkali elution rate of 5.0 to 12.0%.8. The additive for a cement composition according to claim 1 , wherein the powdery cellulose comprises powdery cellulose (B2) having an average degree of polymerization of 900 to 3 claim 1 ,000 as well as an alkali elution rate of 0.1 to less than 5.0%.9. The ...

Method for manufacturing an elastic ceramic matrix composite

Disclosed are: damage-resistant ECMCs that need to work and remain elastic between minus 120° C. and positive 300° C.; ECMCs that need to be able to contain a flame of 1900° C. for more than 90 minutes; and composite structures, especially highly stressed structures. One of the characteristic problems of ceramic matrices is their fragility. Indeed, when a fracture starts, it propagates easily in the matrix. Disclosed are elastic ceramic matrix composites (ECMCs), for which: the ceramic matrix is split into solid “ceramic microdomains” (CMDs); the CMDs are connected to one another by a dense network of “elastic microelements” (EMEs); and the bonds between the EMEs and the CMDs are strong chemical bonds, preferably covalent.

Fire resistant calcium sulphate-based products

The present invention provides calcium sulphate-based product having reduced shrinkage after exposure to high temperatures, the product comprising gypsum, a pozzolan source (e.g. in an amount between 4-27 wt %) and a metal salt additive (in an amount between 0.5 and 10 wt %). The pozzolan source may be selected from a kaolinitic clay material, fly ash, rice husk ash, diatomaceous earths, volcanic ashes and pumices, micro-silica, silica fume and silicone oil, The metal salt additive may be a metal salt which decomposes between a temperature of 300-500° C. to yield a metal oxide, e.g. magnesium nitrate.

Castable material based on cementitious binder with shrinkage resistance

Some embodiments are directed to a new castable cement based material containing a special admixture based internal curing system to reduce the shrinkage and avoid the formation of cracks, and method of producing the same.

Carbon dioxide treatment of concrete upstream from product mold

Fresh concrete is treated with carbon dioxide prior to delivery to a product mold for forming concrete products. Carbon dioxide gas is directed through a manifold, which may be coupled to a feedbox or a hopper, upstream from the product mold. Treating the fresh concrete with the carbon dioxide gas while it is in a loose state prior to placement in the product mold may generally promote uniform and enhanced carbon dioxide uptake.

Honeycomb structure

There is provided a honeycomb structure where a crack at a honeycomb substrate is reduced. A honeycomb structure has a honeycomb substrate that has a porous partition wall defining a plurality of cells extending from an inflow end face as one end face to an outflow end face as another end face and becoming channels for a fluid, and an outer circumference coating layer disposed at an outer circumference of the honeycomb substrate . At 25 to 800° C., a thermal expansion coefficient of the outer circumference coating layer is larger than a thermal expansion coefficient of the honeycomb substrate. The thermal expansion coefficients of the outer circumference coating layer and the thermal expansion coefficient at 25 to 800° C. preferably meet a relationship represented by the expression: 1.1<(the thermal expansion coefficient of the outer circumference coating layer/the thermal expansion coefficient of the honeycomb substrate)<40.

Honeycomb structure

The honeycomb structure includes a honeycomb structure body and a pair of electrode members disposed on a side surface of the honeycomb structure body, each of the pair of electrode members is shaped in the form of a band extending in a cell extending direction, and in a cross section perpendicular to the extending direction of cells, one electrode member is disposed on a side opposite to the other electrode member via a center of the honeycomb structure body, one or more slits opened in the side surface are formed in the honeycomb structure body, the honeycomb structure body has a charging material charged into the at least one slit, the charging material contains aggregates and a neck material, and a ratio (α 2/α1 ) of a thermal expansion coefficient α 2 of the charging material to a thermal expansion coefficient α 1 of the honeycomb structure body is from 0.6 to 1.5.

Low weight and density fire-resistant gypsum panel

An about ⅝ inch to ¾ inch thick low weight, low density gypsum panel with fire resistance capabilities sufficient to provide a Thermal Insulation Index of at least 17.0 minutes which when subjected to U419 test procedures will not fail for at least 30 minutes and, in selected embodiments, also has outstanding water resistance properties.

Drying shrinkage reduction method of cement-based hardened body

The present invention is to provide an economical and efficient method of reducing drying shrinkage of a cement-based hardened body without requiring the cost and/or the labor and time. A cement-based hardened body is impregnated with a solution containing urea or a solution containing sulfate together with urea. An impregnation treatment may be by a method of coating or spraying the cement-based hardened body with the solution, or alternatively, immersing the cement-based hardened body in the solution containing both urea and sulfate for a predetermined period of time. The solution containing both urea and sulfate may be a solution prepared simply by dissolving both urea and sulfate in water. Besides, there are no particular limitations on a liquid allowing dissolution of both urea and sulfate, so long as it causes no impairment of a drying shrinkage reduction effect, and therefore, a solution having the drying shrinkage reduction effect in itself is also applicable for use of a solution containing both urea and sulfate in a state of being dissolved in such solution.

SHRINKAGE-COMPENSATING CONCRETE

A shrinkage compensating concrete does not require restraint. The expansive forces developed during hydration compensate for concrete shrinkage, obviating the need for any added internal or external restraint element. Using this new shrinkage compensating concrete, substantially crack-free slabs may be built without using restraining steel bars, fibers, or other separate restraining element. The shrinkage compensating concrete includes a cement that develops internal expansive forces that never exceed the tensile strength of the concrete, such that the internal expansion compensates for the concrete shrinkage. The expansive cement may be an ASTMS, M or S cement, or other expansive cements may also be used. 1. A shrinkage-compensating mortar , comprising:a hydraulic cement;an expansive additive;sand;water; andsubstantially no internal restraint in the mortar.2. The mortar of wherein expansive forces developed during hydration compensate for shrinkage claim 1 , obviating the need for internal or external restraint.3. The mortar of wherein internal expansive forces are at all times lower than its tensile strength claim 2 , such that internal expansion compensates for shrinkage claim 2 , resulting in shrinkage-compensation without the need for reinforcement.4. The mortar of wherein the expansive cement is an ASTM Type K cement.5. The mortar of wherein the expansive additive comprises an expansive cement.6. The mortar of wherein the expansive cement comprises an oxide or sulfate that expands upon hydration.7. The mortar of wherein the expansive cement comprises calcium sulfoaluminate.8. The mortar of having an expansion exceeding the limits of ASTM C 845.9. The mortar of wherein the hydraulic cement comprises Portland cement.10. A shrinkage-compensating mortar claim 7 , comprising:a hydraulic cement;an expansive additive including an ASTM Type K cement;sand, water, andsubstantially no internal restraint in the mortar.11. The mortar of wherein the expansive additive ...

ADDITIVE FOR INTERNAL POST TREATMENT OF MINERAL BINDER COMPOSITIONS

An admixture for mineral binder compositions, in particular an after-treatment agent for mineral binder compositions, including at least one water-absorbing substance and at least one shrinkage reducer. 1. An admixture for mineral binder compositions , comprising at least one water-absorbing substance and at least one shrinkage reducer.2. The admixture as claimed in claim 1 , wherein the water-absorbing substance comprises at least one representative from the group consisting of superabsorbent polymers claim 1 , sheet silicates claim 1 , starch and cellulose.3. The admixture as claimed in claim 1 , wherein the water-absorbing substance comprises at least one sheet silicate.4. The admixture composition as claimed in claim 1 , wherein the water-absorbing substance comprises starch.5. The admixture as claimed in claim 4 , wherein the modified starch comprises or consists of at least one starch ether.6. The admixture as claimed in claim 1 , wherein the shrinkage-reducing substance is selected from among alcohols claim 1 , monoalcohols claim 1 , glycols claim 1 , diols claim 1 , alkanediols claim 1 , alkenediols claim 1 , polyols claim 1 , alkanolamines and polyalkylene oxides.7. The admixture as claimed in claim 6 , wherein the shrinkage-reducing substance is selected from among alkanediols.8. The admixture as claimed in claim 7 , wherein the shrinkage-reducing substance comprises hexylene glycol and/or neopentyl glycol.9. The admixture as claimed in claim 1 , wherein the shrinkage-reducing substance comprises neopentyl glycol and the water-absorbing substance comprises vermiculite and/or modified starch.10. The admixture as claimed in claim 1 , wherein a weight ratio of the shrinkage-reducing substance to the water-absorbing substance is 5:95-99:1.11. The admixture as claimed in claim 1 , wherein a further additive is additionally present claim 1 , with the further additive being selected from the group consisting of antifoams claim 1 , dyes claim 1 , preservatives ...

Concrete composition

A concrete composition having, in a mixture with water, a hydraulic binder, sand, aggregates, an expanding agent and a shrinkage reducing admixture, wherein the expanding agent is calcium oxide having a low reactivity such that the concrete casted using the composition does not expand by more than 0.05 vol. % during the first 10 days, preferably not expanding more than 0.05 vol. % during the first 7 days, after having been cast. 1. A concrete composition that is(a) a concrete composition comprising, in a mixture with water, a hydraulic binder, sand, aggregates, an expanding agent and a shrinkage reducing admixture, wherein the expanding agent is calcium oxide having a low reactivity such that the concrete does not expand by more than 0.05 vol. %-0.05 vol. %, during the first 10 days, after having been casted; or(b) a concrete composition comprising, in a mixture with water, a hydraulic binder, sand, aggregates, an expanding agent and a shrinkage reducing admixture, wherein the expanding agent is calcium oxide having a low reactivity such that the concrete does not expand by more than 0.05 vol. %, during the first 7 days, after having been casted.2. The concrete composition according to claim 1 , wherein the calcium oxide has a particle size distribution characterized by a residue of at least 6 wt. on a 45 μm mesh sieve.3. The concrete composition according to claim 1 , wherein the calcium oxide has a reactivity that is characterized by a conductivity of <11 mS/cm when dissolved in water.4. The concrete composition according to claim 1 , wherein the calcium oxide has a reactivity that is characterized by an average temperature increase of <0.5° C./min during the first 15 minutes after the addition of the calcium oxide into water.5. The concrete composition according to claim 1 , wherein the calcium oxide has a reactivity that is characterized by a temperature increase of <10° C. during the first 5 minutes after the addition of the calcium oxide into water.6. The ...

SHRINKAGE-COMPENSATING CONCRETE

A shrinkage compensating concrete does not require restraint. The expansive forces developed during hydration compensate for concrete shrinkage, obviating the need for any added internal or external restraint element. Using this new shrinkage compensating concrete, substantially crack-free slabs may be built without using restraining steel bars, fibers, or other separate restraining element. The shrinkage compensating concrete includes a cement that develops internal expansive forces that never exceed the tensile strength of the concrete, such that the internal expansion compensates for the concrete shrinkage. The expansive cement may be an ASTMS, M or S cement, or other expansive cements may also be used. 1. A method of using a shrinkage-compensating mortar , comprising:making a shrinkage-compensating mortar by combining a hydraulic cement, an expansive additive, sand and water;forming the shrinkage-compensating mortar into a mortar structure, with substantially no internal restraint in the mortar structure and with no external restraint acting on the mortar structure.2. The method of wherein expansive forces developed during hydration compensate for shrinkage.3. The method of wherein internal expansive forces are at all times lower than its tensile strength claim 2 , such that internal expansion compensates for shrinkage claim 2 , resulting in shrinkage-compensation without the need for reinforcement.4. The method of wherein the expansive additive comprises an ASTM Type K cement.5. The method of wherein the expansive additive comprises an expansive cement.6. The method of wherein the expansive cement comprises an oxide or sulfate that expands upon hydration.7. The method of wherein the expansive cement comprises calcium sulfoaluminate.8. The method of having an expansion exceeding the limits of ASTM C 845.9. The method of wherein the hydraulic cement comprises Portland cement.10. A shrinkage-compensating mortar claim 7 , comprising:mixing hydraulic cement, an ...

Gypsum composition for dry-curing coating material, gypsum-based coating material, and construction method for gypsum-based coating material

There is provided a gypsum composition for a drying type coating material, the gypsum composition, when made into a gypsum-based coating material by addition of water, capable of forming a coating film in which color unevenness is suppressed even though the coating film is thin and smooth. This gypsum composition for a drying type coating material contains hemihydrate gypsum having a mean particle diameter of 50 μm or less, calcium carbonate having a mean particle diameter of 50 μm or less, and a setting retarder, wherein the gypsum composition has a content of calcium carbonate of 100 to 400 parts by mass and a content of the setting retarder of 0.1 parts by mass or more each based on 100 parts by mass of the hemihydrate gypsum.

USE OF AQUEOUS EMULSIONS BASED ON PROPYLETHOXYSILANE OLIGOMERS AS AN ADDITIVE IN HYDRAULICALLY SETTING CEMENT COMPOSITIONS FOR REDUCTION OF SHRINKAGE CHARACTERISTICS

An aqueous oil-in-water emulsion containing a propylethoxysilane oligomer mixture or a mixture of a propylethoxysilane oligomer mixture and octyltriethoxysilane in a weight ratio of 3:1 to 1:3, at least one emulsifier or an emulsifier system, at least one content of a 2-aminoethanol and water is used as an addition in the production of hydraulically setting cement mixtures such as mortar, screed or concrete for reduction of the shrinkage characteristics.

FIRE RESISTANT CALCIUM SULPHATE-BASED PRODUCTS

The present invention provides a calcium sulphate-based product (e.g. a wall board) comprising gypsum, a pozzolan source such as a clay additive, rice husk ash or diatomaceous earth and a metal salt additive. The product may be produced by drying an aqueous slurry comprising calcined gypsum, the pozzolan source and the metal salt additive. The clay additive may be a kaolinitic clay. The metal salt additive may be a magnesium salt e.g. magnesium nitrate, magnesium chloride or magnesium hydroxide. 156-. (canceled)57. A calcium sulphate-based product comprising gypsum , a pozzolan source and a metal salt additive wherein the metal salt additive is provided in an amount between 5 and 25 wt % (based on the weight of the gypsum , pozzolan source and metal salt) and the metal salt is a nitrate or a chloride.58. A calcium sulphate-based product according to wherein the pozzolan source is a kaolinitic clay additive and is included in an amount between 5 and 30 wt % (based on the weight of the gypsum claim 57 , clay additive and metal salt additive).59. A calcium sulphate-based product according to wherein the pozzolan source is rice husk ash or diatomaceous earth and is included in an amount equal to or greater than 20 wt %.60. A calcium sulphate-based product according to wherein the wt % amount of metal salt and the wt % amount of pozzolan source is equal.61. A calcium sulphate-based product according to comprising 50-85 wt % gypsum.62. A calcium sulphate-based product formed from drying an aqueous slurry containing calcined gypsum claim 57 , a pozzolan source and a metal salt additive wherein the metal salt additive is provided in the slurry in an amount between 5 and 25 wt % (based on the weight of the calcined gypsum claim 57 , pozzolan source and metal salt) and the metal salt is a nitrate or a chloride.63. A calcium sulphate-based product according to wherein the pozzolan source is a kaolinitic clay additive and is included in the slurry in an amount between 5 and 30 ...

NON-AQUEOUS LIQUID ANTI-SHRINKAGE CEMENT ADDITIVES

The present disclosure relates to a method of cementing comprising: providing a cement composition comprising: water, a cement, and a non-aqueous liquid anti-shrinkage cement additive comprising calcined magnesium oxide and a non-aqueous liquid; introducing the cement composition into a subterranean formation; and allowing the cement composition to set in the subterranean formation. Non-aqueous liquid anti-shrinkage cement additives, cement compositions, and systems are also provided. 1. A cement composition comprising:water;a cement; anda suspension of calcined magnesium oxide in a hydrocarbon liquid.2. The composition of wherein the calcined magnesium oxide is present in an amount of about 1% to about 50% by weight in the suspension.3. The composition of wherein the hydrocarbon liquid is selected from the group consisting of natural gas liquids claim 1 , liquid parrafins claim 1 , naphthas claim 1 , mineral oils claim 1 , crude oils claim 1 , synthesized hydrocarbon liquids claim 1 , fuel oils claim 1 , diesels claim 1 , gasolines claim 1 , biomass derived hydrocarbon liquids claim 1 , coal derived hydrocarbon liquids claim 1 , kerosene claim 1 , or combinations thereof4. The composition of wherein the suspension further comprises a dispersant selected from the group consisting of sulfonated naphthalene condensate claim 1 , sulfonated acetone formaldehyde condensate claim 1 , polycarboxylate ethers claim 1 , micro particles claim 1 , or combinations thereof wherein the dispersant is present in an amount of about 0.01% to about 5% by weight in the suspension.5. The composition of wherein the suspension further comprises a viscosifying additive selected from the group consisting of organophilic clay claim 1 , hydrophobically modified silica claim 1 , hydrophobically modified bio-polymers claim 1 , hydrophobically modified synthetic polymers claim 1 , or combinations thereof wherein the viscosifying additive is present in an amount of about 0.01% to about 10% by ...

FIRE-RESISTANT CALCIUM SULPHATE-BASED PRODUCTS

The present invention provides calcium sulphate-based product having reduced shrinkage after exposure to high temperatures, the product comprising gypsum, a pozzolan source (e.g. in an amount between 4-27 wt %) and a metal salt additive (in an amount between 0.5 and 10 wt %). The pozzolan source may be selected from a kaolinitic clay material, fly ash, rice husk ash, diatomaceous earths, volcanic ashes and pumices, micro-silica, silica fume and silicone oil. The metal salt additive may be a metal salt which decomposes between a temperature of 300-500° C. to yield a metal oxide, e.g. magnesium nitrate. 1. A calcium sulphate-based product comprising gypsum , a pozzolan source and a metal salt additive wherein the gypsum is provided in an amount between 65 and 98 wt % (based on the weight of the gypsum , pozzolan source and metal salt) and wherein the metal salt is selected from calcium nitrate and salts of magnesium , copper , zinc , iron or aluminum.2. A calcium sulphate-based product according to wherein the pozzolan source is included in an amount between 4 and 27 wt % (based on the weight of the gypsum claim 1 , pozzolan source and metal salt).3. (canceled)4. A calcium sulphate-based product according to wherein the metal salt additive is included in an amount between 0.5 and 10 wt % (based on the weight of the gypsum claim 1 , pozzolan source and metal salt).5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. A calcium sulphate-based product formed from drying an aqueous slurry containing calcined gypsum claim 1 , a pozzolan source and a metal salt additive wherein the calcined gypsum is provided in the slurry in an amount between 60 and 95 wt % (based on the weight of the calcined gypsum claim 1 , pozzolan source and metal salt) and wherein the metal salt is selected from calcium nitrate and salts of magnesium claim 1 , copper claim 1 , zinc claim 1 , iron or aluminum.11. A calcium sulphate-based product according to wherein the pozzolan source ...

Method for improving cement toughness

This document relates to methods for providing long-term zonal isolation in oil wells using cement compositions that contain triazine-based polymeric additives. The cement compositions containing the polymeric additives exhibit increased tensile strength, elastic strength, or both, without suffering a decrease in compressive strength, as compared to the same cement without the polymeric additive.

HONEYCOMB ASSEMBLY AND PACKAGING SYSTEM

A packaging system for honeycomb assemblies, each including a honeycomb body and reinforcing tube held together by an interference fit or axial compression achieved by thermal expansion coefficient differences between the honeycomb body and reinforcing tube. The reinforcing tube then protects the honeycomb body, facilitating a compact and structurally-strong package. 1. A honeycomb assembly , comprising:a honeycomb body, wherein the honeycomb body comprises a ceramic material, and wherein the honeycomb body comprises flow paths extending lengthwise at least partway therethrough;a reinforcing tube having at least a portion thereof surrounding the honeycomb body, wherein the reinforcing tube comprises a metal material, the reinforcing tube having an interior volume defined as all space interior to interior surfaces of the portion of the reinforcing tube surrounding the honeycomb body,wherein, at a room temperature of 25° C., the reinforcing tube provides a first radial inward force upon the honeycomb body that results in an interference fit holding the honeycomb body within the interior volume of the reinforcing tube;wherein the metal material of the reinforcing tube has a greater coefficient of thermal expansion than the ceramic material of the honeycomb body;wherein the interference fit is such that, when heated to a high temperature, the reinforcing tube provides a second radial inward force upon the honeycomb body that is less than 10% of the first radial inward force, wherein the high temperature is at least 300° C. and less than a melting temperature of the metal material.2. The honeycomb assembly of claim 1 , wherein the first radial inward force results in at least 1.3 MPa of radial compression on the honeycomb body at the room temperature.3. The honeycomb assembly of claim 1 , wherein claim 1 , at temperatures between 25° C. to 300° C. claim 1 , the metal material has a thermal expansion coefficient of at least 40×10cm/cm/° C. claim 1 , the ceramic material ...

Cement slurries, cured cement and methods of making and use of these

Cement slurries, cured cements, and methods of making cured cement and methods of using cement slurries are provided. The cement slurries have, among other attributes, improved elasticity and self-healing properties and may be used, for instance, in the oil and gas drilling industry. The cement slurry comprises water, a cement precursor material, and a block copolymer composition. The block copolymer composition has at least one copolymer backbone, with each copolymer backbone comprising at least two hard segments. Furthermore, a soft segment is disposed between the at least two hard segments. The copolymer backbone has at least one anhydride group grafted onto the soft segment, and the anhydride group is crosslinked by an aminosilane crosslinker.

Compositions and methods for cementing using elastic particles

Cement compositions including mixtures of substantially elastic material and cement that may be formulated exhibit reduced bulk volume shrinkage during curing as compared to conventional cement compositions. In one application, such cement compositions may be used for cementing in substantially closed system, such as the interior of a mold used for producing preformed concrete items.

Cement compositions comprising particulate carboxylated elastomers and associated methods

Methods of cementing comprising: providing a cement composition comprising water, a cement, and a particulate elastomer comprising a carboxy group; and allowing the cement composition to set. Cement compositions comprising water, a cement, and a particulate elastomer comprising a carboxy group.

Cement compositions comprising particulate carboxylated elastomers and associated methods

Methods of cementing comprising: providing a cement composition comprising water, a cement, and a particulate elastomer comprising a carboxy group; and allowing the cement composition to set. Cement compositions comprising water, a cement, and a particulate elastomer comprising a carboxy group.

Compositions containing biosoluble inorganic fibers and micaceous binders

Compositions that include a mixture of biosoluble inorganic fibers and a micaceous binder are described. The compositions can be prepared free of refractory ceramic fibers that are respirable but durable in a physiological medium. The compositions are typically in the form of a sheet material or a paste and can be used, for example, as a protective packing material around the pollution control element or as an insulating material in the end cone region in a pollution control device. Sheet materials formed from the compositions have an area of a X-Y plane that decrease less than about 6 percent when heated to about 900°C.

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.

Gypsum compositions and related methods

A set gypsum composition and methods for the preparation thereof are disclosed. The set gypsum composition comprises a continuous phase of interlocking set gypsum matrix having an enhanced water voids volume and/or is prepared from a mixture (e.g., slurry) comprising an elevated ratio of water to calcined gypsum. Also disclosed is an article comprising the set gypsum composition.

Reinforced elastomers

An elastomeric composition for use in a borehole comprising a base polymer and a reinforcing reactive filler is disclosed. The elastomeric composition maintains flexibility before interaction and rigidity after interaction and therefore is suitable for use in downhole sealing systems.

Multipurpose, cement dispersing polymers for high flow and high strength concrete

Cementitious article comprising hydrophobic finish

Disclosed are cementitious articles with hydrophobic finish. In some embodiments, the article is a waterproof gypsum panel that is surface reinforced with inorganic mineral fibers that face a flexible and hydrophobic cementitious finish possessing beneficial waterproofing properties. The waterproof gypsum panels of the invention are useful in many applications, such as, for example, tilebacker board in wet or dry areas of buildings, exterior weather barrier panel for use as exterior sheathing, and roof cover board having superior water durability and extremely low surface absorption. The flexible and hydrophobic cementitious finish of the invention can include Class C fly ash, film-forming polymer, silane compound (e.g., alkyl alkoxysilane), and other optional additives.

一种用于道路的沥青改性剂及其制备方法

本发明提供一种用于道路的沥青改性剂及其制备方法。这种沥青改性剂是由生物蛋白石、偏高岭石、硫磺和天然岩沥青组成。其生产方法是将4种原料烘干至水分≤2％，并加工成400目至800目，然后按配比混合均匀而制得。将此沥青改性剂加入到基质沥青中，高温稳定性、低温抗裂性及水稳性显著改善，生产工艺简单，操作方便，是一种经济实用的沥青改性材料。

树脂混凝土组合物及其成形品

提供树脂含量减少,流动性优越,不要低收缩剂的,其成形品没有裂纹的高强度树脂混凝土组合物及其成形品。该树脂混凝土组合物由(A)(a )不饱和酸、二和/或三亚烷基二醇和双环戊二烯构成的不饱和聚酯和(b )聚合性不饱和单体构成的树脂组合物,(B)骨材和(C)填充材构成。

Resin concrete composition and molded article thereof

A resin concrete composition and its molded article are provided, the resin concrete, even with a reduced resin content, having an excellent flowability, which is an important property in a molding operation, and necessitating no shrinkage reduction agent, and the molded article having no cracks and being highly strong. The resin concrete composition comprises (A) a resin composition containing (a) an unsaturated polyester of an unsaturated acid, a di- and/or trialkylene glycol, and dicyclopentadiene and (b) a polymerizable unsaturated monomer, (B) an aggregate, and (C) a filler.

Waterproof Asphalt Concrete Composition for Overlay Pavement Having Petroleum Resin Added Hydrogen, Stylene Isoprene Stylene and Aggregate-powder of Improved Grain Size and Constructing Methods Using Thereof

The present invention provides a waterproof asphalt concrete composition for bridge pavement comprising, based on 100 parts by weight of asphalt: 1 to 25 parts by weight of styrene isoprene styrene; 1 to 25 parts by weight of a hydrogenated petroleum resin; 500 to 2,000 parts by weight of aggregate; 30 to 150 parts by weight of fine powder aggregate; to 2 parts by weight of cellulose fibers; 0.1 to 2 parts by weight of wax; 0.1 to 2 parts by weight of a performance improving agent; and 0.1 to 2 parts by weight of an antioxidant. The waterproof asphalt concrete composition for bridge pavement according to the present invention has high cohesive power and high bonding power, has excellent waterproofness and good durability, prevents plastic deformation, aging, and/or peeling, prevents penetration water and portholes, and prevents salt damage and neutralization.

High grade asphalt concrete composition for excellent crack-resistance with rubber powder and constructing methods using the same

The present invention relates to a high grade asphalt concrete composition having a high PG rating of 88-34, 94-34, and 100-34 and excellent crack resistance, and a construction method using the same. The high grade asphalt concrete composition comprises: 0.01-5 parts by weight of a styrene-butadiene-styrene (SBS) block copolymer; 10-20 parts by weight of a styrene-isoprene-styrene (SIS) block copolymer; 0.01-5 parts by weight of an acrylonitrile-butadiene-styrene (ABS) resin; 10-40 parts by weight of aged rubber powder obtained by mixing waste rubber powder of which a surface is activated with a plasticizer at a weight ratio of 1:1 and aging the mixture at a temperature of 150-175°C for 50-70 minutes; 1-20 parts by weight of process oil; 5-30 parts by weight of a petroleum resin; 5-30 parts by weight of a mixed modifier of a low density polyethylene (LDPE) modifier and at least one kind of a polymer modifier selected from the group consisting of polyethylene (PE), polypropylene (PP), an ethylene acrylic copolymer, ethyl vinyl acetate, polyvinyl chloride, ethylene propylene, polyolefin, and a mixture thereof; 0.01-1 parts by weigh of polystyrene (PS); 2-20 parts by weight of calcium hydroxide; 50-2,000 parts by weight of aggregates; 0.01-5 parts by weight of a filler; 1-10 parts by weight of an antioxidant; and 1-10 parts by weight of an anti-stripping agent, with respect to 100 parts by weight of an asphalt binder.

Highly elastic asphalt binder for crack control and stress relaxation, and asphalt-concrete mixture containing thereof

The present invention provides a high elastic asphalt binder. The high elastic asphalt binder is to prevent pavement from being damaged due to a crack in an existing pavement or damage, by having a high elastic stress absorption layer between rigid pavement and an asphalt overlap layer when an asphalt mixture overlaying method for maintenance of the rigidity pavement is applied. Also, the high elastic asphalt binder is to provide resistance to a reflection crack from a lower layer, stress relaxation from the upper part, and elastic recovery. Polybutene and/or polyisobutene, diethyl hexyl phthalate (DOP) and/or diethyl hexyl adipate, polybutadiene rubber, and vinyl terminated butadiene acrylonitrile (VTBN) and/or carboxyl terminated butadiene acrylonitrile (CTBN) are applied to an asphalt additive composed of naphthene process oil, vegetable oil, mineral oil, an organic vulcanization accelerator, and an asphalt modifier having a thermoplastic elastomer as a main ingredient. So, the high elastic asphalt binder for reflection cracking control and stress relaxation is provided.

Reflection crack resistant, low noise, highly durable asphalt mixture and its thin layer surfacing pavement method

Provided are: an economic and eco-friendly asphalt additive for inhibiting reflection crack and enhancing the durability of a road; an asphalt mixture comprising the same; and a method for paving a thin layer using the same. The inventors invents: a plant-type asphalt additive in which plant oil, naphthene-based oil, a mineral fiber, and an organic vulcanization accelerator are mixed; a low-noise asphalt mixture comprising the additive; and a method for paving a reflection crack-resistant, low-noise, and highly durable thin layer using the asphalt mixture.

一种低收缩低徐变抗裂高性能大体积混凝土

本发明涉及一种低收缩低徐变抗裂高性能大体积混凝土，属混凝土技术领域。在单掺粉煤灰的情况下实现了混凝土表观密度≥2400kg/m 3 ，28d抗压强度≥70MPa、28d抗拉强度≥4.7MPa的要求、365d干缩率≤519×10 ‑6 、365d的受压徐变度≤28.0×10 ‑6 /MPa、365d受压徐变系数≤0.72。本发明的显著特点是用该混凝土配合比拌制混凝土无特殊搅拌工艺、搅拌简便、可改变搅拌加料顺序。混凝土拌合物粘度适中、黏聚性好、施工时泵压小易于泵送浇筑，混凝土抗裂性能好、收缩小和徐变低、体积稳定性好，使用于高强度应力复杂大体积混凝土施工减少裂缝产生的几率。混凝土单掺粉煤灰可减少搅拌站的料仓配置与合理使用机制砂中的石粉，避免资源浪费，降低能耗，大大降低了成本，符合混凝土绿色发展之路。摘要不得超出300字，故删除。

一种高抗疲劳开裂性能的复合改性沥青混合料的制备方法

本发明公开了一种高抗疲劳开裂性能的复合改性沥青混合料的制备方法，先将70#道路石油沥青加热至120℃‑170℃，再将胶粉与SBS改性剂均匀加入，先机械高速旋转搅拌35min，再在175℃条件下剪切乳化25min，最后在170℃烘箱中静置溶胀60min得到胶粉/SBS复合改性沥青；再与矿料、玄武岩纤维拌合制成掺BF胶粉/SBS复合改性沥青AR‑SMA13混合料。本发明所述的混合料采用SBS改性剂替代胶粉改性沥青中的部分胶粉，不仅提高了胶粉改性沥青的整体性能、稳定性，而且可以改善胶粉改性沥青与玄武岩纤维之间的浸润性、界面作用，大幅度提高了其抗疲劳开裂性能，疲劳寿命比SBS改性沥青混合料、常规橡胶沥青混合料有显著的增大。

Ready mixed concrete contained watertight, inorganic, crack decreasing matter

본 발명은 수밀성 무기질 균열저감제가 함유된 레미콘 조성물에 관한 것으로, 콘크리트의 균열저항성 및 수밀성의 개선을 통하여 중성화, 염소이온침투, 철근부식 억제 등 내구성이 향상될 수 있도록 함을 목적으로 한다. The present invention relates to a ready-mixed concrete composition containing a water-tight inorganic crack reducing agent, and to improve the durability, such as neutralization, chlorine ion penetration, reinforcement corrosion inhibition through the improvement of crack resistance and water tightness of concrete. 개시된 본 발명에 따른 수밀성 무기질 균열저감제가 함유된 레미콘 조성물은, 수밀성 무기질 균열저감제 전체 100중량%에 대하여 규불화염 2.0~9.9중량%, 가용성 실리카 20~40중량%, 방향족계 고분자 축합물 0.5~3중량%, 질산염계 무기화합물 0.2~2.0중량% 및 물 45.1~77.3중량%로 구성된 수밀성 무기질 균열저감제(a)가 레미콘 결합재(b)에 대하여 0.3~0.99중량% 첨가되어 이루어진다. 상기 수밀성 무기질 균열저감제(a)는, 액상불화규산과 물의 혼합물 전체 100중량%에 대하여 액상불화규산 10~24.9중량%를 물 75.9~90중량%에 융해하여 상기 불화규산으로부터 해리된 규불화이온을 가수분해 반응시켜 불소이온 및 교질상태의 가용성 실리카를 생성하고, 여기에 상기 액상불화규산과 물의 혼합물 전체 100중량%에 대하여 추가적으로 1.3~15중량%의 2가 금속염 그룹을 혼합하며, 상기 2가 금속염 그룹으로부터 해리된 2가 금속이온과 상기 규불화이온을 반응시켜 규불화염을 생성시킨 후 고분자 축합물과 질산염계 무기화합물을 각각 혼합하여 생성된다. The ready-mixed concrete composition containing the water-tight inorganic crack reducing agent according to the present invention is 2.0 to 9.9 wt% of silicic salt, 20 to 40% by weight of soluble silica, and 0.5 to aromatic polymer condensate based on 100% by weight of the water-tight inorganic crack reducing agent. Water-tight inorganic crack reducing agent (a) consisting of 3% by weight, 0.2-2.0% by weight of nitrate-based inorganic compound and 45.1-77.3% by weight of water is added by 0.3 to 0.99% by weight relative to the ready-mixed binder (b). The water-tight inorganic crack reducing agent (a) hydrolyzes 10-24.9% by weight of liquid fluorosilicate to 75.9-90% by weight of water with respect to 100% by weight of the total mixture of liquid fluorosilicate and water to hydrolyze silicic ions dissociated from the fluorosilicate. Reacting to form fluorine ions and colloidal silica, mixed 1.3 to 15% by weight of a divalent metal salt group with respect to 100% by weight of the total mixture of liquid ...

沥青路面预防性养护超薄罩面混合料及制备方法和添加剂

本发明公开了一种沥青路面预防性养护超薄罩面混合料及制备方法和添加剂，混合料的组分为：集料80～90％，矿粉5～15％，沥青4～4.8％，沥青路面预防性养护超薄罩面添加剂0.15～0.6％；沥青路面预防性养护超薄罩面添加剂的组分为：热塑性弹性体40～50％，4006工业白油35～45％，聚乙烯蜡1～10％，C5石油树脂5～15％；本发明提供沥青路面预防性养护超薄罩面添加剂的配方合理，能够提升沥青路面预防性养护超薄罩面混合料的抗飞散能力和抗水损能力，同时改善面层混凝土柔韧性，具有良好的抗疲劳抗开裂能力，同时该添加剂采用直接投入拌合站的方式进行生产，无需专用设备，工艺简单，利于广泛推广应用。

Mortar composition for preventing deterioration and repairing of concrete structure and repairing method using the same

The present invention relates to an inorganic structure-based polymer mortar composition for preventing deterioration and repairing a cross-section of a concrete structure, which comprises Portland cement, silica sand, prompt cement, slag, garnet and a crack inhibitor, and to a method for preventing deterioration and repairing a section of a concrete structure using the inorganic polymer mortar composition. The thermal expansion coefficient and elastic modulus of the mortar composition used to repair the cross-section of the deteriorated concrete structure are similar to those of the concrete structure, the adhesion of the mortar composition to the concrete structure is excellent, so that problems such as cracks, peeling, erosion due to the temperature or environmental changes can be prevented, and the durability of the concrete structure is extended due to excellent durability and wear resistance.

수소가 첨가된 석유수지 및 sis를 포함하는 배수성 아스팔트 콘크리트용 바인더 조성물 및 이의 시공방법

본 발명은 아스팔트 100중량부를 기준으로, 스티렌이소프렌스티렌 1 내지 25중량부; 수소가 첨가된 석유수지 1 내지 25중량부; 왁스 0.1 내지 2중량부; 박리방지제 0.1 내지 2중량부; 및 산화방지제 0.1 내지 2중량부를 포함하는 배수성 아스팔트 콘크리트용 바인더 조성물을 제공한다. 본 발명에 따른 배수성 아스팔트 콘크리트용 바인더 조성물은 고응집력과 고결합력을 구비하여 저소음성 및 배수성이 우수하고, 외기온도변화에 따른 영향을 최소화하여 균열, 표면박리, 탈락(포트홀) 등의 발생을 방지할 수 있는 배수성 아스팔트 콘크리트용 바인더 조성물을 제공한다.

무기계 폴리머 스톤몰탈 마감재 조성물 및 이를 이용한 시공방법

본 발명은 무기계 폴리머 스톤몰탈 마감재 조성물 및 이를 이용한 시공방법을 개시한다. 이는 백시멘트 40 내지 50중량%, 천연 또는 인조 규사 30 내지 50중량%, 마이크로 실리카, 석회, 금강사, 탄산칼슘 및 점토 중에서 선택되는 적어도 1종의 무기 충전제 2 내지 8중량%, 소수성 변성 화이바 0.5 내지 2.5중량%, 메타 카올린 2 내지 5중량%, 천연화이바 및 미세점토 중에서 선택되는 적어도 1종의 점성 안정제 0.05 내지 0.5중량%, 분산제 0.2 내지 0.7중량%, 소포제 0.1 내지 0.5중량% 및 무기안료 0.5 내지 5중량%를 포함하는 무기질계 칼라 파우더; 및 아크릴계 수지 분말, 폴리비닐알콜계 수지 분말, 에틸렌비닐아세테이트계 수지 분말, 비닐아세테이트계 수지 에멀젼, 아크릴계 수지 에멀젼, 합성 고무계 수지 에멀젼, 합성 고무계 라텍스, 천연 고무계 라텍스 및 고무 아스팔트계 고무 라텍스 중 선택되는 적어도 1종의 수성 폴리머 레진을 포함하는 것으로, 습기가 있는 표면에도 시공이 가능하고, 난연성 재질과 천연재료(소수성 변성 천연 화이바, 실리카 샌드, 무기 충진재 등)를 이용한 친환경 재료로 구성되어 있으며, 콘크리트 표면에서 올라오는 수압을 통과시켜 들뜸 현상을 최소화한 통기성 제품이면서, 충격에 의한 크랙 저항성이 향상되고 균일한 강도 발현 및 안정성 등이 향상된 무기계 폴리머 스톤몰탈 마감재 조성물이다.

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.

Cement compositions comprising particulate carboxylated elastomers and associated methods

Methods of cementing comprising: providing a cement composition comprising water, a cement, and a particulate elastomer comprising a carboxy group; and allowing the cement composition to set. Cement compositions comprising water, a cement, and a particulate elastomer comprising a carboxy group.

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.

Rapid hardening concrete composition for bridge deck overlay concrete pavement using ferro-nickel slag and the costruction method of bridge deck overlay concrete pavement thereof

The present invention relates to a rapid-hardening concrete composition for bridge deck overlay pavement using classified ferro-nickel slag fine aggregate, and a method for constructing bridge deck overlay pavement using the same. The rapid-hardening concrete composition for bridge deck overlay pavement includes: 100 parts by weight of rapid-hardening cement; 200-250 parts by weight of ferro-nickel slag fine aggregate classified into a particle size of 1.2-2.5 mm; 5-20 parts by weight of a mixed thickener containing a cellulose-based thickener, acrylic thickener and a polyethylene oxide-based thickener at the same weight ratio; and 50-80 parts by weight of water. The rapid-hardening concrete composition provides improved cement bondability, water-proof property, cracking resistance and salt damage resistance by virtue of the effect of removing fine voids of the mixed thickener.

セメント添加剤組成物ならびにセメント配合物

(57)【要約】 【課題】 収縮低減効果および防凍効果を与えかつこれ らの効果を付与する薬剤に対し徐放性を備えたセメント 添加剤組成物を提供。 【解決手段】 一般式（１）Ｒ（ＯＡ） ｎ ＯＨ（ただ し、式中、ＲはＨまたはＣ 1 〜 4 のアルキル基、ＡはＣ 2 〜 3 のアルキレン基を表わし、またｎは１〜２０の整 数を表わす。）で表わされるアルキレングリコール化合 物を、該アルキレングリコール化合物で膨潤し得る樹脂 に吸収させてなるセメント添加剤組成物。

Resin mortar composition for construction and operating method using the same

본 발명은 유동성, 저장성, 및 시공시에 셀프레벨링(self-leveling)성이 우수하며, 시공 후 내마모성, 표면 내스크레치성, 내크랙성, 및 내구성이 우수하며, 시공이 용이하고, 경화시간을 조절하기가 용이하며, 경제적인 수지 모르타르에 관한 것으로, 고형분 기준으로 a) 상온경화형 유기 액상 수지 100 중량부; b) 200 메쉬 내지 3 ㎜의 유리 비드(glass bead) 10 내지 200 중량부; c) 10 ㎛ 내지 1 ㎜의 유리 분말(glass powder) 10 내지 400 중량부; d) E-글래스 조성의 유리 장섬유를 2 내지 12 ㎜의 섬유길이로 재단한 절단섬유 또는 100 내지 300 ㎛의 길이로 분쇄한 분쇄섬유인 유리섬유(glass fiber) 0.1 내지 50 중량부; 및 e) 용제 1 내지 100 중량부를 포함하고, 점도가 5,000 내지 10,000 cPs인 바닥용 건축용 수지 모르타르 조성물 및 이를 이용한 미려한 표면을 가지며, 크랙이 발생하지 않는 면을 시공하는 시공방법을 제공한다. The present invention has excellent fluidity, storage property, and self-leveling property during construction, and is excellent in wear resistance, surface scratch resistance, crack resistance, and durability after construction, ease of construction, and hardening time. Easy to adjust, and relates to an economical resin mortar, based on a solid content a) 100 parts by weight of the room temperature-curable organic liquid resin; b) 10 to 200 parts by weight of glass beads of 200 mesh to 3 mm; c) 10 to 400 parts by weight of glass powder of 10 μm to 1 mm; d) 0.1 to 50 parts by weight of glass fiber, which is a chopped fiber cut into a long glass fiber of E-glass composition to a fiber length of 2 to 12 mm or a pulverized fiber of 100 to 300 μm in length; And e) a solvent containing 1 to 100 parts by weight, having a viscosity of 5,000 to 10,000 cPs, and a construction resin mortar composition for flooring and a beautiful surface using the same.

Crack inhibition type latex modified ultra rapid harding cement concrete compositions and repairing method of road pavement using the same

The present invention relates to crack inhibition type latex modified ultra rapid hardening cement concrete compositions, which include: 10 to 30 wt% of a ultra rapid hardening cement binder, 30 to 60 wt% of fine aggregate, 20 to 50 wt% of coarse aggregate, 1 to 20 wt% of a performance modifier, and 1 to 20 wt% of mixing water. Accordingly, the exhibition intensity is increased, and the structure and void structure of a cement hardened body are improved, so that watertightness and resistance are improved.

Complex additive for concretes and construction mortars and concrete mix

FIELD: construction. SUBSTANCE: invention is related to composition of complex additive for concretes and construction mortars, including the following components, wt %: sodium thiocyanate 2.0-65.0, sodium thiosulfate 10.0-60.0, sodium sulfate 0.1-10.0, sodium carbonate 1.0-10.0; water - the rest. Specified complex additive may also additionally contain sodium ferrocyanide and/or sodium polythionate. Invention is also related to concrete mix, which contains the following components, wt %: cement 9.5- 24.4, sand 24.0-38.0, crushed stone - 42.0-45.0, specified additive 0.05-1.0, water - the rest. Invention is developed in dependant claims. EFFECT: stabilisation of physical-mechanical properties of complex additive during their storage, higher impermeability, crack resistance of concrete with specified additive, accelerated concrete strength gain, also at lower hardening temperature. 8 cl, 4 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 364 575 (13) C2 (51) МПК C04B C04B C04B C04B 22/08 (2006.01) 28/02 (2006.01) 103/60 (2006.01) 103/14 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21), (22) Заявка: 2007144561/03, 04.12.2007 (24) Дата начала отсчета срока действия патента: 04.12.2007 (43) Дата публикации заявки: 10.06.2008 (57) Реферат: Изобретение относится к составу комплексной добавки для бетонов и строительных растворов, включающей, мас.%: роданид натрия 2,0-65,0, тиосульфат натрия 10,0-60,0, сульфат натрия 0,1-10,0, карбонат натрия 1,0-10,0; вода - остальное. Указанная комплексная добавка может также дополнительно содержать гексацианоферрат натрия и/или политионаты натрия. Изобретение также относится к бетонной смеси, содержащей, мас.%: цемент 9,5-24,4, песок 24,0-38,0, щебень - 42,0-45,0, указанная добавка 0,05-1,0, вода - остальное. Изобретение развито в зависимых пунктах. Технический результат - стабилизация физико-механических свойств комплексной добавки при ее хранении, повышение ...

High Grade Waterproofing Asphalt Concrete Composition SIS and CRM and Constructing Methods Using Thereof

The present invention provides a high grade waterproofing asphalt concrete composite containing: 0.1-50 parts by weight of styrene-isoprene; 5-20 parts by weight of styrene butadiene; 10-60 parts by weight of waste tire powder; 2-15 parts by weight of anti-aging agent for rubber; 2-15 parts by weight of an ultraviolet absorbing agent; 2-15 parts by weight of a compatibilizer; 3-15 parts by weight of an antioxidant; 2-15 parts by weight of a deformation preventing agent; 10-30 parts by weight of biomass; 1-10 parts by weight of a performance improver; 5-20 parts by weight of an adhesion promoter; 1-10 parts by weight of a release agent; and 1-10 parts by weight of a stabilizer with respect to 100 parts by weight of asphalt. The high grade waterproofing asphalt concrete composite according to the present invention is provided with high cohesive power and high coupling power to have excellent waterproofness, has high performance grade (PG 88-40), has excellent durability, prevents infiltrating water and potholes while preventing easy occurrence of plastic deformation, aging and/or peeling, reduces noises and performs pavement at low costs.

Cement composite and method for forming the same

一种抗裂人造石英石板材的制备方法

本发明公开了一种抗裂人造石英石板材的制备方法，包括如下步骤：（1）称取如下重量份的原料：石英砂20‑25份、石英粉18‑35份、纳米二氧化硅0.2‑0.3份、木质纤维2‑6份、不饱和聚酯树脂8‑10份、固化剂1‑2份、γ‑氨丙基三乙氧基硅烷0.2‑3份、颜料0.2‑0.3份，所述不饱和聚酯树脂其固含量≥72%，黏度为1.3‑1.6Pa·s（25℃），酸值为18‑20mgKOH/g；（2）将物料搅拌均匀；（3）布料；（4）压制成型；（5）固化；（6）将完全固化后的板材转入抛光线，首先是将板材定厚抛光，其次将板材切边，最后进行打磨抛光；（7）将制备得到板材产品，经过检验、分级、包装，入库。本发明的制备工艺流程短、步骤简单、操作方便；本发明的人造石英石板材具有解决了人造石英石开裂、变形等问题。

합성석을 위한 조성물

합성석을 위한 조성물이 기술된다. 상기 조성물은 (a) 3 내지 25 중량%의 아크릴 수지를 가지며, 상기 아크릴 수지는 (i) >50 내지 최대 95 중량%의 메틸 메타크릴레이트 및 메틸 메타크릴레이트 단량체 잔기, (ii) 4 내지 40 중량%의 고비점 모노(알크)아크릴레이트 단량체, (iii) 선택적으로, 0 내지 10 중량%의 다른 아크릴레이트 또는 비닐 공단량체 잔기, 및 (iv) 가교제를 갖는다. 성분 (a)(i)의 MMA 잔기는, (공)중합체의 적어도 80 중량%의 MMA 잔기를 포함하는 MMA 잔기 함유 (공)중합체의 형태로 아크릴 수지 중에 존재한다. 상기 조성물은 (b) 70 내지 95 중량%의 충전제; 및 (c) 선택적으로, 커플링제를 추가로 갖는다. 상기 조성물은 특히 실외 용용분야에 사용하기 위한 합성석의 제조에 유용하다.

Bitumen-mineral composition

FIELD: manufacture of building materials. SUBSTANCE: composition for road pavements, roofing and waterproofing coatings, containing bitumen, polyethylene, plasticizer, and mineral filler is characterized in that said polyethylene component is mixture of low- pressure and high-pressure polyethylenes at ratio 1:(1-2) obtained as insulation tape production waste, said mineral filler is treated by plasticizer limestone screenings fraction 0-5 mm, said plasticizer is industrial sewage waste from thermomechanical working of metal parts in motor car industry, containing calcium and magnesium carbonates, aluminum, iron, calcium, and magnesium hydroxides, abrasive particles, spent spindle and tall oils, at specified proportions. EFFECT: reduced power consumption and increased heat and cracking resistance of pavements and coatings. 2 tbl сб6бсо09с ПЧ сэ РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) (51) МПК? ВИ” 2160 292‘ 13) С2 С 081 95/00, 23/06 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 99102023/04, 02.02.1999 (24) Дата начала действия патента: 02.02.1999 (46) Дата публикации: 10.12.2000 (56) Ссылки: ЗЧ, 808440, А. 28.02.1981. $4, 628154 А, 23.08.1918. (98) Адрес для переписки: 446201, Самарская обл., г. Новокуйбышевск, АО "Трубоизоляция", начальнику БРИЗа Ланцовой Н.П. (71) Заявитель: АО "Трубоизоляция" (72) Изобретатель: Помещиков В.И., Арсеньев И.Р., Шеина Т.В., Тюрин Н.П. , Клименков О.М. (73) Патентообладатель: АО "Трубоизоляция" (54) БИТУМОМИНЕРАЛЬНАЯ КОМПОЗИЦИЯ (57) Изобретение относится к технологии изготовления материалов на основе битумов и предназначено для использования при устройстве дорожных, кровельных и гидроизоляционных покрытий. Техническим результатом изобретения является повышение тепло- и трещиностойкости, а также снижение энергозатрат. Результат достигается тем, что битумоминеральная композиция, включающая битум, полиэтилен, пластификатор и минеральный наполнитель, отличается тем, что в качестве полиэтилена ...

Mixture for aerated concrete

FIELD: construction. ^ SUBSTANCE: mixture for aerated concrete contains the following components, wt %: cement 60-70; foaming agent - hydrolysed blood 0.5-0.7; foam stabiliser - iron vitriol 0.02-0.04; additive of synthetic zeolite sol of NaX type and sol stabiliser - NaOH 0.03-0.07; water 29.19-39.45. ^ EFFECT: increased compression strength, frost resistance of aerated concrete, reduced shrinkage of aerated concrete in process of hardening. ^ 4 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 392 253 (13) C1 (51) МПК C04B 38/10 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21), (22) Заявка: 2009121416/03, 04.06.2009 (24) Дата начала отсчета срока действия патента: 04.06.2009 (45) Опубликовано: 20.06.2010 Бюл. № 17 Адрес для переписки: 454080, г.Челябинск, пр. им. В.И. Ленина, 76, ЮУрГУ, технический отдел при твердении. Смесь для пенобетона содержит, мас.%: цемент 60-70; пенообразующая добавка - гидролизованная кровь 0,5-0,7; стабилизатор пены - железный купорос 0,02-0,04; добавка золя синтетического цеолита типа NaX и стабилизатора золя - NaOH 0,03-0,07; вода 29,19-39,45. 4 табл. R U 2 3 9 2 2 5 3 (57) Реферат: Изобретение относится к области строительных материалов и может быть использовано для изготовления изделий в промышленном и гражданском строительстве. Технический результат - повышение прочности при сжатии, морозостойкости пенобетона/уменьшение усадки пенобетона Ñòð.: 1 ru C 1 C 1 (54) СМЕСЬ ДЛЯ ПЕНОБЕТОНА 2 3 9 2 2 5 3 (73) Патентообладатель(и): Государственное образовательное учреждение высшего профессионального образования "Южно-Уральский государственный университет" (RU) R U (56) Список документов, цитированных в отчете о поиске: RU 2306300 C1, 20.09.2007. RU 2306221 C2, 20.09.2007. RU 2305087 C1, 27.08.2007. RU 2256632 C1, 20.07.2005. DE 3930458 A1, 21.03.1991. (72) Автор(ы): Королев Александр Сергеевич (RU), Хакимова Эльвира Шарифовна (RU), Олюнин Павел Сергеевич (RU), Волошин ...

一种膨胀混凝土及其低碱高效混凝土膨胀剂

本发明提供了一种膨胀混凝土及其低碱高效混凝土膨胀剂,膨胀混凝土是由水泥10～20%、砂子20～40%、石子30～60%,外加水泥重量6～10%的膨胀剂组成,所说膨胀混凝土为补偿收缩混凝土或大膨胀接缝混凝土其特征是由经700℃－1100℃煅烧的焦宝石20－40%、硫酸铝5－20%和硬石膏40－60%共同粉磨而成,该膨胀剂的优点是膨胀率高,掺量低,碱含量低,存放时间长,不受气候条件影响,增强高强、耐酸、耐碱、成本低,工艺简单,需水量少,有利于泵送混凝土的坍落度保持,易于生产实施。

保水抗裂型混凝土

本发明公开的是一种保水抗裂型混凝土，主要解决了现有常规混凝土防裂效果不佳、保水效果不好、且强度较低的问题。本发明包括水泥砂浆、石子、抗碱玻璃纤维，该水泥砂浆、石子和抗碱玻璃纤维的重量比为1：0.9～1.2：0.1～0.2，所述水泥砂浆由以下重量份的组分构成：35～50wt%的沙粒、15～20wt%的铝酸钙水泥、4～8wt%的聚丙烯酰胺、20～25wt%的粉煤灰、4～8wt%可再分散乳胶粉、2～5wt%硫酸铝。本发明具强度高、保水性优异且防裂效果极佳等优点。

Concrete composition having reduction of autogenous shrinkage and improved adhesiveness and repairing method for concrete pavement using the same

The present invention relates to a concrete composition with improved autogenous shrinkage reduction and adhesiveness and a repairing method for concrete pavement using the same, wherein the concrete composition comprises a cement binder, fine aggregate, coarse aggregate, a functional polymer for mixing concrete, and mixed water. The cement binder is an ultra-rapid hardening cement binder or a high early-strength cement binder; and the functional polymer for mixing concrete is made of a double structure in which 2-ethylhexyl prop-2-enoate and 2-methyl prop-2-enoic acid are further copolymerized to the surface of polymer particles where ethenylbenzene and ethyl prop-2-enoate are polymerized to be branched, such that the center of the polymer particles is maintained in a hard state to enhance heat resistance and the surface of the polymer particles is maintained in a soft state, thereby improving autogenous shrinkage reduction and adhesiveness. Accordingly, shrinkage and expansion due to a change in external temperature are reduced, and adhesiveness is improved, thereby providing a concrete structure and a packaging body with excellent resistance to cracks.

Complex additive for concrete and mortar, and foam concrete mix

FIELD: construction. SUBSTANCE: composition of complex additive for concrete and mortar includes, wt %: sodium thiocyanate 25.0-65.0, sodium thiosulfate 1.0-15.0, sodium sulfate 0.1-10.0, sodium carbonate 1.0-40.0; sodium formiate 1.0-35.0; the rest is water. Claimed complex additive can also include sodium hexacyanoferrate and/or polythionate. Also invention claims composition of concrete mix including, wt %: cement - 9.5-24.4, sand 24.0-38.0, crushed stone 42-45.0, claimed additive - 0.05-1.0, the rest is water. Invention is elaborated in dependent clauses. EFFECT: preserved physical and mechanical properties of complex additive for over six months, enhanced water permeability and fracture resistance of concrete with claimed additive, accelerated strength gain of concrete. 8 cl, 4 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 354 619 (13) C1 (51) МПК C04B C04B C04B C04B 22/08 (2006.01) 28/02 (2006.01) 103/60 (2006.01) 103/14 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (73) Патентообладатель(и): Башлыков Николай Федорович (RU), Майорова Ирина Игоревна (RU), Башлыков Владимир Николаевич (RU), Майоров Сергей Владимирович (RU) Адрес для переписки: 141400, Московская обл., г. Химки, ул. Кирова, 12, кв.45, Н.Ф. Башлыкову 2 3 5 4 6 1 9 цемент - 9,5-24,4, песок 24,0-38,0, щебень 42-45,0, указанная добавка - 0,05-1,0, вода остальное. Изобретение развито в зависимых пунктах. Технический результат - сохранение физико-механических свойств комплексной добавки в течение времени более шести месяцев, повышение непроницаемости, трещиностойкости бетона с указанной добавкой, ускорение набора прочности бетона, в том числе при отрицательной температуре окружающей среды. 2 н. и 6 з.п. ф-лы, 4 табл. R U (57) Реферат: Изобретение относится к составу комплексной добавки для бетонов и строительных растворов, включающей, мас.%: роданид натрия 25,0-65,0, тиосульфат натрия 1,0-15,0, сульфат натрия 0,1-10,0, карбонат ...

Комплексная добавка для бетонов и строительных растворов "реламикс-м"

1. Комплексная добавка для бетонов и строительных растворов, включающая суперпластификатор, лигносульфонаты технические - ЛСТ и поташ, отличающаяся тем, что она дополнительно содержит формиат натрия при следующем соотношении компонентов, мас.% на сухое вещество:2. Добавка по п.1, отличающаяся тем, что в качестве суперпластификатора она содержит С-3 или Полипласт СП-1. ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß RU (19) (11) 2006 143 160 (13) A (51) ÌÏÊ C04B 14/00 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÇÀßÂÊÀ ÍÀ ÈÇÎÁÐÅÒÅÍÈÅ (21), (22) Çà âêà: 2006143160/03, 06.12.2006 Àäðåñ äë ïåðåïèñêè: 125009, Ìîñêâà, à/ 184, ÏÏÔ "ÞÑ", ïàò.ïîâ. Â.È.Èîíîâó, ðåã. N 107 (72) Àâòîð(û): Öåïèëîâà Èðèíà Àíàòîëüåâíà (RU), Ãîðîáåö Èëü Èãîðåâè÷ (RU) R U (43) Äàòà ïóáëèêàöèè çà âêè: 20.06.2008 Áþë. ¹ 17 (71) Çà âèòåëü(è): Îòêðûòîå àêöèîíåðíîå îáùåñòâî "Ïîëèïëàñò" (RU) (54) ÊÎÌÏËÅÊÑÍÀß ÄÎÁÀÂÊÀ ÄËß ÁÅÒÎÍÎÂ È ÑÒÐÎÈÒÅËÜÍÛÕ ÐÀÑÒÂÎÐΠ"ÐÅËÀÌÈÊÑ-Ì" ñóïåðïëàñòèôèêàòîð 41,0-60,0 ËÑÒ 0,3-0,4 Ïîòàø 5,0-40,0 R U A Ñòðàíèöà: 1 RU 30,0-40,0 2. Äîáàâêà ïî ï.1, îòëè÷àþùà ñ òåì, ÷òî â êà÷åñòâå ñóïåðïëàñòèôèêàòîðà îíà ñîäåðæèò Ñ-3 èëè Ïîëèïëàñò ÑÏ-1. 2 0 0 6 1 4 3 1 6 0 A Ôîðìèàò íàòðè 2 0 0 6 1 4 3 1 6 0 (57) Ôîðìóëà èçîáðåòåíè 1. Êîìïëåêñíà äîáàâêà äë áåòîíîâ è ñòðîèòåëüíûõ ðàñòâîðîâ, âêëþ÷àþùà ñóïåðïëàñòèôèêàòîð, ëèãíîñóëüôîíàòû òåõíè÷åñêèå - ËÑÒ è ïîòàø, îòëè÷àþùà ñ òåì, ÷òî îíà äîïîëíèòåëüíî ñîäåðæèò ôîðìèàò íàòðè ïðè ñëåäóþùåì ñîîòíîøåíèè êîìïîíåíòîâ, ìàñ.% íà ñóõîå âåùåñòâî:

Self leveling polymer-modified mortar composition having improved strength and durability

A mortar composition is provided to be superior in compressive strength, bending strength, tensile strength, adhesive strength, and durability, have low shrinkage and good water tightness, and be applicable to roads, water-stop structures, etc. A mortar composition is obtained by mixing a binder and aggregate in a weight ratio of 1:1 to 1:2. The binder comprises 50-70 parts by weight of ultrafine cement having a Blaine fineness of 4,500-7,000 cm^(2)/g, 15-20 parts by weight of alumina cement, and 10-20 parts by weight of alumina silicate-based cenosphere powder. The binder further includes at least one selected from the group consisting of an aluminum potassium expansion material, fly ash, and silica fume.

Non-shirinkage mortar composition with crack resistance and the concrete structure section restoration method using thereof

The present invention relates to a mortar composition having crack resistance and shrinkage resistance, and a cross-section repair method of a concrete structure using the same. More particularly, the present invention relates to a mortar composition having crack resistance and shrinkage resistance, and a cross-section repair method of a concrete structure using the same, which provides a mortar composition having crack resistance and shrinkage resistance during cross-section repair of a concrete structure without using a separate shrinkage reducing agent or crack preventing agent. The present invention also provides a construction method for repairing a cross-section of a concrete structure using the same. Therefore, the present invention has an excellent effect of maximizing the protection of the concrete cross-section repair surface.

Complex additive

FIELD: construction. SUBSTANCE: complex additive contains, wt %: sol of silicic acid 55.7-72.7; foaming agent on protein basis 16.0-18.0; sodium fluoride NaF 11.3-26.3. EFFECT: improved steam permeability; lower shrinkage and sorption moisture of cellular polystyrene. 1 tbl, 1 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 400 443 (13) C1 (51) МПК C04B C04B C04B C04B 22/12 (2006.01) 24/14 (2006.01) 38/10 (2006.01) 103/14 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21), (22) Заявка: 2009125905/03, 06.07.2009 (24) Дата начала отсчета срока действия патента: 06.07.2009 (45) Опубликовано: 27.09.2010 Бюл. № 27 Адрес для переписки: 190031, Санкт-Петербург, Московский пр., 9, ПГУПС, патентный отдел также понижение усадки и сорбционной влажности пенобетона. Комплексная добавка содержит, мас.%: золь кремниевой кислоты 55,7-72,7; пенообразующую добавку на протеиновой основе 16,0-18,0; фторид натрия NaF 11,3-26,3. 1 табл. R U 2 4 0 0 4 4 3 (57) Реферат: Изобретение относится к строительным материалам и может быть использовано в качестве комплексной добавки в растворную смесь при производстве пенобетона. Технический результат изобретения повышение паропроницаемости пенобетона, а Ñòð.: 1 ru C 1 C 1 (54) КОМПЛЕКСНАЯ ДОБАВКА 2 4 0 0 4 4 3 (73) Патентообладатель(и): Государственное образовательное учреждение высшего профессионального образования "Петербургский государственный университет путей сообщения" (RU) R U (56) Список документов, цитированных в отчете о поиске: RU 2278839 C1, 27.06.2006. RU 2270823 C1, 27.02.2006. RU 2283819 C1, 20.09.2006. RU 2256629 C1, 20.07.2005. GB 1482925 A, 20.07.2005. (72) Автор(ы): Сватовская Лариса Борисовна (RU), Сычева Анастасия Максимовна (RU), Елисеева Наталья Николаевна (RU) RUSSIAN FEDERATION (19) RU (11) 2 400 443 (13) C1 (51) Int. Cl. C04B C04B C04B C04B 22/12 (2006.01) 24/14 (2006.01) 38/10 (2006.01) 103/14 (2006.01) FEDERAL SERVICE FOR INTELLECTUAL PROPERTY, ...

一种抗裂混凝土配方

本发明涉及一种抗裂混凝土配方，涉及混凝土原材料技术领域,其技术问题为现有的混凝土由于其配方材料中，砂石的粒径较大，难以与其他材料融合的较为紧密，容易在混凝土干燥成型后存在细小间隙，而细小间隙一旦受到外力，即容易导致混凝土开裂；其包括如下重量份的原料：水泥100‑120份、研磨砂石500‑600份、水50‑60份和减水剂5‑10份。本发明具有提高混凝土的抗裂的效果。

一种抗裂透明人造大理石的制备方法

本发明涉及建筑装饰材料制备技术领域，具体涉及一种抗裂透明人造大理石的制备方法。本发明将将环氧乙烯基树脂粒掺入到自制得到的分散胶液中加热，再加入添加剂固化成型得到抗裂透明人造大理石，在人造大理石中，氢氧化铝与树脂的亲和力大，人造大理石抗重压的强度也就越大，不易产生裂纹，分散胶液中以二氧化硅作为人造大理石填料，氢氧化铝与二氧化硅的折光指数相近，固化后大理石不易产生产生银纹、空洞现象，并增加了致密度，减少大理石内部光线因折射而发白的现象，从而提高了人造大理石的透明度，使人造大理石具有天然大理石的外观效果，应用前景广阔。