45results about How to "Good resistance to sulfate attack" patented technology

The invention relates to a mine-filling cementing material and preparation method thereof. The cementing material is prepared from the following raw materials in weight percentage: 75 to 85 percent of iron-making water-granulated slag which is quenched by water, 15 to 22 percent of activating agent and 0 to 5 percent of intensifier, wherein the activating agent comprises quicklime or hydrated lime and the CaO content of the activating agent is 70 to 80 percent based on the dry weight; the intensifier comprises plaster; and the grinded granularity of the raw materials is + 0.071 millimeters and the content of the grinded raw materials is not more than 12 percent. The preparation method comprises the steps of: drying the raw materials, mixing the raw materials in a ratio, dryly grinding the raw materials to prepare dry a mine filling cementing material; or drying the raw materials, dryly grinding the raw materials respectively and then mixing the raw materials to prepare a dry material in a ratio; or mixing the raw materials in a dry weight ratio, adding water into the mixture and wetly grinding the mixture to obtain the mine-filling cementing material slurry. The mine-filling cementing material and the preparation method thereof can save cost and realize the high-efficiency waste resource recycling; tail cementing filling material prepared by adopting the cementing material of the invention has the advantages of relatively high mechanical strength, high water absorption capability and high sulphate resistance, so the min- filling cementing material is a cementing material better than cement in the aspect of mine cemented filling.

The invention relates to a nickel iron slag gelling material and a production technology, relate to the nickel iron slag gelling material, and especially relates to cement produced by the nickel ironslag and a production method thereof. The nickel iron slag gelling material comprises the following components in parts by weight: 40-70 parts of Portland cement clinker, 30-60 parts of nickel iron slag low-temperature clinker, and 1-2 parts of gypsum, wherein the nickel iron slag low-temperature clinker comprises the following components in parts by weight: 20-30 parts of nickel iron slag, 9-15 parts of quicklime, 0.5-1 part of gypsum, 5-10 parts of water, and 0.2-0.6 parts of an alkaline electrolyte. The method can effectively solve the environment problem of stacking of nickel iron slag, realizes high-efficiency resource utilization of the nickel iron slag, and reduces CO2 discharge capacity during a cement preparation process, the nickel iron slag low-temperature clinker can substitutethe Portland cement clinker to produce the gelling material, and the produced nickel iron slag low-temperature gelling material has the characteristics of low hydration heat and good anti-sulfate erosion performance.

The invention belongs to the field of building materials, and particularly relates to a high-activity composite mixed material for improving erosion resistance of cement concrete. The high-activity composite mixed material is prepared from the following raw materials in parts by weight: 50-80 parts of calcined clay, 19-49.9 parts of limestone and 0.1-1 part of a water reducing agent, wherein the mass percentage of CaO in the limestone is less than 48%. The invention provides the composite mixed material prepared from the calcined clay, the low-grade limestone and the water reducing agent, andthe composite mixed material has relatively high activity. When the composite mixed material is used in a large amount, strength of cement and concrete is not reduced, and meanwhile, sulfate corrosionresistance and chloride ion permeation resistance of the cement and the concrete can be obviously improved.

The invention discloses a concrete for low-grade highway prepared by cementing materials, sandstone materials, water and sodium sulphate, wherein the cementing materials are formed by cement, carbide slag and fly ash, the weight percentage of the cement accounts for 35-45% of the cementing materials, the balance is carbide slag and fly ash with the weight ratio of 1: 2.7-3.3; the weight ratio of each component is as follows: cementing materials 9-10 weight parts, sandstone materials 35-37 weight parts, water 3.2-4 weight parts, the dosage of the sodium sulphate accounting for 3.25-3.75% of the weight total of the carbide slag and fly ash. The invention also discloses a method for preparing the concrete comprising steps of preparation of concrete mixture, construction by compaction technology and maintenance.

The present invention relates to an early-strength flyash three-slag road bed material, said road bed material composition includes 10%-30% of flyash, 5%-15% of slaked lime, 60%-84.5% of broken stone and 0.5%-1% of early-strength agent, and adds the water whose added quantity is 37% of the above-mentioned total weight, and the early strength agent is formed from two portions of high calcium lime and one portion of sodium sulfate, the flyash, slaked lime and broken stone are dry material, and the total content of SiO2 and Al2O3 in the flyash is greater than 70%, and the total content of active calcium oxide and magnesium oxide in the slaked lime is greater than 30%.

The invention provides a nickel iron slag-mineral slag low-hydration-heat cementing material and preparation method thereof, and belongs to the field of building materials. The cementing material comprises the following substances in parts by mass: 46-49 parts of a low-temperature clinker and 0.5-1 part of gypsum, wherein the low-temperature clinker comprises the following substances in parts by mass: 20-40 parts of nickel iron slag, 20-30 parts of mineral slag, 20-35 parts of quick lime, 0.3-0.8 part of gypsum, 0.5-2 parts of a diluent and 8-15 parts of water. The efficient resource utilization of the nickel iron slag is realized, and the usage amount of Portland cement is effectively reduced. The nickel iron slag and the mineral slag are used as raw materials, and the quick-hard and low-hydration-heat cementing material which can partially replace the Portland cement is prepared. Compared with the Portland cement, the cementing material has the characteristics of quick hardening, lowhydration heat and good resistance to sulfate erosion.

The invention provides an inorganic cementing material and a preparation method thereof. The cementing material is obtained by jointly grinding a composite material obtained by steam curing and calcinating material blocks or material balls prepared from coal ash, lime, an exciting agent and water, Portland cement and gypsum. The preparation method includes the steps that by mass, 65-80 parts of coal ash, 20-35 parts of effective CaO of lime and 0.5-2.0 parts of exciting agent are jointly ground into a batch mixture with the degree of fineness being 45 microns and the residue on sieve being smaller than 10%, 15-50 parts of water is added, the mixture is mixed to be uniform, then aging is conducted for 2-3 hours, the material blocks or the material balls are subjected to steam curing for 8-16 hours at the temperature of 90-98 DEG C after being formed, and a steam cured material is obtained; the steam cured material is calcinated for 15-90 minutes at the temperature of 750-1,000 DEG C and then air cooled or cooled in air, and the composite material is obtained; 60-70 parts of the composite material, 20-30 parts of Portland cement and 5-10 parts of gypsum are jointly ground till the specific area is 350-450 m<2> / kg, and the fast-setting high-strength inorganic cementing material is prepared.

The invention relates to alkali-activated concrete and a preparation method thereof. The alkali-activated concrete comprises components in percentage by mass as follows: 12.5%-20.8% of alkali-activated cementing material powder, 2.1%-3.5% of Na2O*nSiO2 (n is 2.00-3.00), 6.3%-10.4% of water, 35.9%-43.5% of coarse aggregate and 29.4%-35.6% of fine aggregate, wherein the alkali-activated cementing material powder comprises silicon-calcium slag micro-powder, mineral powder and superfine mineral powder. The preparation method of the alkali-activated concrete comprises steps of preparation of the silicon-calcium slag micro-powder, preparation of the alkali-activated cementing material powder, mixing of the alkali-activated cementing material powder, the aggregate and the water, addition of Na2O*nSiO2, stirring and the like. The alkali-activated concrete is prepared from novel silicon-calcium slag as a raw material, so that the alkali-activated concrete has higher freezing and thawing cycle resistance and sulfate corrosion resistance and can be applied to buildings in freezing and thawing environments and offshore or marine environments, and resource recycling is facilitated because of adoption of the silicon-calcium slag as the main raw material.

The invention relates to novel Portland slag P.SA32.5 cement. The cement comprises the following components by weight percent: 55-61% of clinker, 4-6% of limestone, 18-21% of slag, 4-7% of volcanic ash, 3-5% of fly ash and 3-6% of desulfurization gypsum. The cement has the advantages that industrial waste slag ingredients generated in the production processes in steel mills are adopted, thus not only reducing the production cost but also eliminating pollution sources, achieving economical efficiency and environment friendliness, improving the later strength of the cement and ensuring the quality of engineering construction.

An early-strengthening silicate cement clinker contains 3CaO.SiO2, 4CaO.Al2O3.Fe2O3, 3(CaO.Al2O3).CaSO4 and 11CaO.7Al2O3.CaF2, and is prepared by high-speed calcining method using vertical kiln. Its advantages are high productivity, early strengthening, stable latter strength, and excellent performance.

The invention relates to novel Portland slag P.SB32.5 cement. The cement comprises the following components by weight percent: 45-55% of clinker, 4-6% of limestone, 28-32% of slag, 4-7% of volcanic ash, 3-5% of fly ash and 3-6% of desulfurization gypsum. The cement has the advantages that industrial waste slag ingredients generated in the production processes in steel mills are adopted, thus not only reducing the production cost but also eliminating pollution sources, achieving economical efficiency and environment friendliness, improving the later strength of the cement and ensuring the quality of engineering construction.

The invention relates to novel Portland cement. The Portland cement comprises the following raw materials in parts by weight: 60-70 parts of clinker, 15-19 parts of ultrafine slag, 5-7 parts of limestone, 5-7 parts of gypsum, and 6-9 parts of an admixture; the admixture is prepared by silica fume, a methacrylic acid calcium salt hydrate, 1-(3-trifluoromethylphenyl)piperazine monohydrochloride, and4-(4-fluorobenzoyl)piperidine hydrochloride. At early stage of hydration, the novel Portland cement utilizes fluorine ions and calcium ions which are ionized from 1-(3-trifluoromethylphenyl)piperazine monohydrochloride and 4-(4-fluorobenzoyl)piperidine hydrochloride for forming calcium fluoride, so that a lot of calcium ions are consumed, a double electric layer structure is difficult to form onthe surface of C3S, induction period of C3S is shortened and disappear, hydration process is rapidly accelerated, and heat release rate at early stage of hydration is improved. Accordingly, the heat release rate range of the cement in a hardening maintenance phase is floated between 5-10%, cracks in hardened cement are smaller, and the strength of a cement test piece is improved.

The invention relates to novel Portland slag cement P.SA42.5. The cement comprises the following components by weight percent: 68-72% of clinker, 4-6% of limestone, 18-20% of slag and 4-6% of desulfurization gypsum. The cement has the positive effects that the industrial waste slag produced in the production process in a steel mill is adopted for burdening, thus not only reducing the production cost but also eliminating the pollution sources and achieving the economic property and environment friendliness; and by adopting the slag for burdening, the later strength of the cement is improved and the quality of the engineering construction is ensured.

The invention discloses an aluminate cement resistant to corrosion of sulfate and a preparation method thereof, and aims to provide an aluminate cement, which can prevent corrosion of sulfate in seawater. Innovatively, alumina is added into raw materials of cement, the phase composition of cement clinker is changed, and the phase composition of the cement clinker is controlled. The provided aluminate cement and common aluminate cement are subjected to a sulfate corrosion resisting test under same conditions, and the result shows that the anticorrosion coefficient of the provided aluminate cement is obviously increased.

The invention relates to a manufacturing method of geopolymer oil well cement. The method is characterized by comprising the following steps in order: compounding, grinding, calcination, mixing, warehousing and packaging. The method provided by the invention can manufacture the geopolymer oil well cement with good volume stability, high temperature resistance, CO2 resistance, and sulfate attack resistance. And the cement can be effectively applied to oil-gas well cementation in areas with complex geological conditions, and can achieve very good cementing quality.

The invention discloses a graphene modified glass fiber preparation method, a sulfate corrosion resistant graphene-concrete composite material and a preparation method thereof. The sulfate corrosion resistant graphene-concrete composite material is prepared from 150-240kg / m<3> of cement, 45-50kg / m<3> of coal ash, 40-60kg / m<3> of silicon ash, 600-900kg / m<3> of coarse aggregates, 70-120kg / m<3> of river sand, 20-50kg / m<3> of nano silicon dioxide, 30-50kg / m<3> of graphene modified glass fibers, 1-7.5kg / m<3> of a water reducing agent and 105-150kg / m<3> of water. By high strength and flexibility and large specific surface area of graphene, glass fiber clusters are open and roughened to be grafted to a graphene network, and consequently the graphene / concrete composite material high in strength, toughness and sulfate corrosion resistance are obtained.

The invention relates to a nickel iron slag gelling material and a production technology, relate to the nickel iron slag gelling material, and especially relates to cement produced by the nickel ironslag and a production method thereof. The nickel iron slag gelling material comprises the following components in parts by weight: 40-70 parts of Portland cement clinker, 30-60 parts of nickel iron slag low-temperature clinker, and 1-2 parts of gypsum, wherein the nickel iron slag low-temperature clinker comprises the following components in parts by weight: 20-30 parts of nickel iron slag, 9-15 parts of quicklime, 0.5-1 part of gypsum, 5-10 parts of water, and 0.2-0.6 parts of an alkaline electrolyte. The method can effectively solve the environment problem of stacking of nickel iron slag, realizes high-efficiency resource utilization of the nickel iron slag, and reduces CO2 discharge capacity during a cement preparation process, the nickel iron slag low-temperature clinker can substitutethe Portland cement clinker to produce the gelling material, and the produced nickel iron slag low-temperature gelling material has the characteristics of low hydration heat and good anti-sulfate erosion performance.