9results about How to "Promotes early hydration" patented technology

The invention relates to low-carbon high-durability concrete in the field of concrete. The low-carbon high-durability concrete comprises the following components in parts by weight: 30-35 parts of cement, 40-46 parts of a cementing material, 180-190 parts of coarse aggregate, 150-160 parts of fine aggregate, 4-6 parts of an air entraining and water reducing agent and 60-70 parts of water, the cementing material comprises the following components in percentage by weight: 50-55% of granulated blast-furnace slag, 5-10% of steel slag, 3-5% of desulfurized gypsum, 1-3% of tailings, 2-4% of desulfurized fly ash, 2-4% of red mud, 3-5% of a reinforcing agent and the balance of silicon hydrochloric acid cement clinker. The method has the effect of improving the durability and strength of the low-carbon concrete.

The invention relates to the field of concrete materials, in particular to a high-strength impermeable concrete and a cement pole, which comprises, by weight, 500-600 parts of gel material, 1400-1600 parts of aggregate, 100-120 parts of epoxy resin emulsion, 20-30 parts of hydroxy acrylate emulsion, 5-10 parts of aliphatic organic amine, 50-80 parts of epoxy basalt fiber, 5-10 parts of calcium sulfoaluminate, 10-20 parts of ethanolamine-modified metakaolin, 1-5 parts of polycarboxylate water reducer and 100-120 parts of mixing water. The high-strength impermeable concrete prepared by the invention has excellent mechanical strength and excellent waterproof and impermeability performance.

The invention discloses an enhanced cement grinding aid and a preparation method thereof, and belongs to the technical field of cement admixtures. The concrete additive is prepared from the following raw materials in parts by weight: 20-30 parts of an alcohol amine compound, 10-20 parts of ethylene glycol, 1-3 parts of a surfactant, 0.3-0.5 part of a defoaming agent, 3-5 parts of a macromolecular synergist, 1-3 parts of a polycarboxylate superplasticizer, 0.5-1.5 parts of molasses and 20-30 parts of water. The alcohol amine compound comprises triethanolamine and modified alcohol amine; the macromolecular synergist is a sodium alginate-beta-cyclodextrin macromolecular compound. According to the cement grinding aid, the cement grinding efficiency can be remarkably improved, and the machine-hour yield is improved by 24.5% or above; the 3-day strength of the cement is improved by 5.9 MPa or above, and the 28-day strength of the cement is improved by 10.7 MPa or above, so that the cement has a good market application prospect.

The invention discloses high-compactness low-resilience shotcrete and a preparation method thereof, and relates to the field of shotcrete, the preparation method comprises the following steps: (1) respectively stacking a cementing material, a fine aggregate and a coarse aggregate by adopting an MAA model to obtain a design ratio of each internal raw material; and (2) fully mixing the cementing material, the fine aggregate, the coarse aggregate and the elasticity reducing agent which are obtained according to the design ratio in the step (1), adding water and a water reducing agent for mixing, and doping an accelerator in a manner of mixing with pressurized air to obtain the high-compactness low-resilience sprayed concrete. The early-strength elasticity reducing agent is adopted, pumpability of the sprayed concrete is improved, early hydration of the concrete is accelerated, under the combined action of the early-strength elasticity reducing agent and the alkali-free accelerator, the early mechanical property of the sprayed concrete is rapidly improved, and the construction efficiency of the sprayed concrete is improved. And by adopting multi-section close packing, close filling structures are respectively formed in the cementing material, the fine aggregate and the coarse aggregate, so that the plastic viscosity of the slurry and the compactness of the concrete are effectively improved.

The application discloses a kind of high density low rebound shotcrete and preparation method thereof, it is related to shotcrete field, and preparation method includes: (1), respectively to cementitious material, fine aggregate, coarse aggregate is using MAA model to be packed and the design ratio of each raw material in interior is obtained;(2), cementitious material, fine aggregate, coarse aggregate and the rebounding agent of design ratio obtained according to step (1) are fully mixed, water, water reducing agent is mixed, then by the way of mixing with pressurized air, incorporate accelerator, obtain high density low rebound shotcrete.The application uses early strength rebounding agent, improves the pumpability of shotcrete, accelerates the early hydration of concrete, under the joint action of alkali-free accelerator, rapidly improves the early mechanical properties of shotcrete, improves shotcrete construction efficiency.Multiple close packing is used, and cementitious material, fine aggregate, coarse aggregate respectively form close packing structure, effectively improve the plastic viscosity of paste and the compactness of concrete.

The application discloses a preparation method of low-shrinkage low-heat low-carbon concrete, and has the technical characteristics that high-water-absorption autoclaved silicate functional aggregate is used to replace gravel and yellow sand, and the mass sum of fly ash and mineral powder in the cementing material can be up to 60% at most. The high-water-absorption water-saturated autoclaved silicate functional aggregate and the expanding agent are added into the concrete, the humidity is released through the functional aggregate, the internal curing and the expansion of the expanding agent are cooperated, the self-shrinkage, the drying shrinkage and the hydration heat shrinkage of the concrete are reduced, and the strength of the concrete is improved; the grading of the fine aggregate of the superfine yellow sand is improved through the addition of the fine functional aggregate, the working performance of the concrete is improved, and the low-carbon environmental protection of the concrete is realized through the large amount of mineral admixtures.

This invention discloses a phosphorus slag-based cementitious material, its preparation method, and its application, specifically relating to the field of cementitious materials technology. The cementitious material, by weight, comprises the following components: 60-90 parts phosphorus slag powder; 5-25 parts fly ash; 5-15 parts activator; 0.25-1.5 parts early-strength agent; and 0.2-0.5 parts water-reducing agent; wherein the specific surface area of ​​the phosphorus slag powder is 400-550 m². 2 / kg, particle size (D) 90 The particle size is 20-40 μm; the early-strength agent is selected from at least one of iron salts and aluminum salts. This invention uses phosphorus slag micro-powder with a specific specific surface area as the main substrate, with a high dosage, combined with fly ash, activator, early-strength agent, and water-reducing agent to obtain phosphorus slag-based cementitious materials. By optimizing the physical properties of the phosphorus slag micro-powder and constructing a suitable composite activator-early-strength system, the 28-day compressive strength of the cementitious material reaches over 61.0 MPa, achieving a balance between "high phosphorus slag content" and "high strength".

The invention discloses a high-ductility cement-based composite material and a preparation method thereof. The high-ductility cement-based composite material is prepared from the following raw materials in parts by weight: 281 to 400 parts of cement, 888 to 914 parts of fly ash, 66 to 136 parts of recycled concrete micro powder, 450 to 490 parts of sea sand, 320 to 348 parts of water, 24 to 27 parts of polyvinyl alcohol fiber, 20 to 30 parts of styrene acrylate emulsion and 4 to 6 parts of water reducing agent. The styrene acrylate emulsion is prepared from the following raw materials in parts by weight: 10 to 20 parts of styrene, 2 to 10 parts of butyl acrylate, 10 to 30 parts of methyl methacrylate, 0.5 to 1 part of sodium dodecyl sulfate, 20 to 40 parts of water and 0.1 to 0.5 part of ammonium persulfate. The styrene acrylate emulsion is adopted to modify the cement-based composite material, the problem that sea sand affects the fresh mixing performance and hydration reaction of concrete is solved, the ductility and durability of the cement-based composite material are improved, and the cement-based composite material has good mechanical properties.

The invention discloses an underwater early strength filler, and relates to the technical field of fillers, and the underwater early strength filler is prepared from the following components: cement, composite fly ash, an early strength agent, hydrophosphate, a water reducing agent, hollow microspheres, carboxymethyl cellulose, polyacrylamide, a defoaming agent and water. The cement is Portland cement; wherein the hydrophosphate is sodium hydrogen phosphate; wherein the diameter of the hollow microspheres is 100 microns; the underwater early strength filler prepared by the invention can quickly form strength to meet the requirements of underwater construction, through the cooperation of the components, the filler can also realize higher early strength underwater, the stability and safety of the structure are ensured, and meanwhile, the underwater early strength filler has the advantages of favorable water resistance and favorable water resistance. The underwater early strength filler prepared by the invention generally has excellent water flow dispersion resistance, and the uniformity and stability of the components of the filler can be ensured.