958 results about "Superplasticizer" patented technology

The invention relates to the technical field, and particularly discloses a nano-modified epoxy building thermal insulation material and a preparation method thereof. The nano modified epoxy building thermal insulation material is prepared from the following raw materials in parts by mass: 80 to 120 parts of Portland cement, 20 to 40 parts of slag powder, 5 to 10 parts of hollow mesoporous silicon dioxide, 0.1 to 1 part of pyrrole, 0.1 to 0.2 part of ammonium persulfate, 5 to 10 parts of nano silicon dioxide, 10 to 15 parts of bisphenol S epoxy resin, 1 to 5 parts of acrylic acid, 1 to 2 parts of polylysine, 0.01 to 0.1 part of catalyst and 1 to 2 parts of curing agent. The concrete is prepared from the following raw materials in parts by weight: 20-30 parts of epoxy resin, 4-8 parts of loaded aerogel, 0.1-1 part of polycarboxylate superplasticizer, 1-4 parts of composite fiber and 0.2-1.25 parts of hydrogen peroxide. The fireproof building material has excellent toughness, can better resist cracking and absorb energy, effectively avoids cracking and damage under the action of thermal stress, and ensures that the building material has a fireproof effect.

The invention discloses sound-insulation and heat-insulation building mortar and a preparation method thereof, and relates to the technical field of building materials, the sound-insulation and heat-insulation building mortar comprises, by weight, 42-48 parts of a cementing material, 15-25 parts of an auxiliary material, 17-22 parts of lightweight aggregate, 30-35 parts of a functional filler, and 1-2 parts of an additive; the cementing material is a mixture of sulphoaluminate cement and Portland cement; the auxiliary material is a mixture of fly ash and quartz sand, the lightweight aggregate is a mixture of 20-40-mesh hollow vitrified microbeads and 70-90-mesh hollow vitrified microbeads, and the mass ratio of the hollow vitrified microbeads to the hollow vitrified microbeads is 1: (2-3); the functional filler is a mixture of modified waste rubber particles and modified fibers; the additive is a mixture of a polycarboxylate superplasticizer and hydroxypropyl methyl cellulose ether. The mortar disclosed by the invention is good in thermal insulation performance and excellent in mechanical property, the method disclosed by the invention is simple to operate and low in cost, and the prepared mortar is excellent in performance.

The invention discloses shrinkage-free aluminoferrite cement-based ultra-high performance concrete and a preparation method thereof, and belongs to the technical field of novel wall materials, and the shrinkage-free aluminoferrite cement-based ultra-high performance concrete comprises the following components: an activated cementing material, mineralized aggregate, an additive, reinforced fibers and mixing water. Due to the slow release effect of the methyl cellulose coating on the composite expanding agent, precise compensation of self-constriction is achieved, and contraction deformation in the curing and using process is effectively inhibited. Due to the unique mineral composition of the aluminoferrite cement, the early strength of the concrete is sharply improved, and the production cycle of prefabricated parts is greatly shortened. The steel fibers subjected to sand blasting and pre-wrapping modification can effectively bridge microcracks in the concrete and limit crack propagation; the polycarboxylate superplasticizer disperses the modified carbon nanofibers, crack initiation is inhibited from the microscopic level, and mechanical properties such as fracture resistance and impact resistance of the joint part and the prefabricated part are remarkably improved through cooperation of the polycarboxylate superplasticizer and the modified carbon nanofibers.

The invention belongs to the field of building decoration materials, and discloses a GRG gypsum composite reinforced material and a preparation method thereof. The high-strength concrete is prepared from the following components in parts by weight: 45 to 65 parts of alpha-semi-hydrated gypsum, 12 to 20 parts of composite reinforced fiber, 0.5 to 2 parts of graphene nanofiber, 2 to 5 parts of nano silica fume, 5 to 10 parts of ethylene-vinyl acetate copolymer latex powder, 1 to 2.5 parts of hydroxypropyl methyl cellulose, 0.1 to 0.8 part of polycarboxylic acid type water reducing agent, 1 to 4 parts of calcium stearate, 3 to 8 parts of vermiculite powder and 28 to 40 parts of deionized water. Aiming at the problems that an existing GRG material is insufficient in mechanical property, low in fireproof grade, poor in thermal performance, poor in durability and the like, a multi-dimensional synergistic enhancement system is constructed by adopting composite reinforced fibers, functional nanofiller and a gradient preparation process, the problems of dispersion and interfacial compatibility of the nanofiller are solved, and the comprehensive performance of the GRG material is improved. The performance breakthrough of high strength, high fire resistance, low heat conduction and long durability is realized.

The invention relates to the field of concrete admixtures, in particular to a high-temperature-resistant early-strength slump-retaining polycarboxylate superplasticizer as well as a preparation method and application thereof. The high-temperature-resistant early-strength slump-retaining polycarboxylate superplasticizer provided by the invention contains unsaturated aryl imide silane which can accelerate the cement hydration acceleration period and shorten the concrete setting time, and cooperates with an imide group to improve the heat resistance of a polymer, and then the heat resistance of the polymer is further improved by virtue of the micro-crosslinking effect of N, N-methylene bisacrylamide, so that the high-temperature-resistant early-strength slump-retaining polycarboxylate superplasticizer is prepared. A huge three-dimensional adsorption structure is formed through high-hydrophilic groups such as phosphate groups and benzene rings in the molecular structure and rigid groups, steric hindrance is increased, the slump retention capacity of concrete is improved, a large number of hydrophilic groups such as carboxyl and hydroxyl can form hydrogen bonds with water molecules, the strength of concrete is enhanced, and the concrete is applied to concrete production and has good application prospects. The premixed concrete has the advantages and technical effects that the premixed concrete still has good fluidity and slump retentivity in a high-temperature environment, the setting time is short, and the early strength is high.

The invention provides low-carbon premixed concrete based on industrial solid waste synergistic activation and a preparation method of the low-carbon premixed concrete. The low-carbon premixed concrete is prepared from the following components: a nano silicon-based anti-corrosion early strength agent, a cementing material, recycled aggregate, electric furnace tailings, waste carbon fibers, a polycarboxylate superplasticizer and water, the preparation method comprises the following steps: S1, preparing a nano silicon-based anti-corrosion early strength agent through silane hydrolysis and modification reaction of nano silicon dioxide; s2, preparing a cementing material: mixing fly ash, steel slag, mineral slag and Portland cement, calcining, grinding, spraying a composite alkali activator, and aging; s3, mixing and forming: wet-mixing the cementing material, the recycled aggregate, the iron tailing sand, the waste fibrilia, the nano silicon-based anti-corrosion early strength agent, the polycarboxylate superplasticizer and water, and pre-injecting and forming; and S4, carbonization curing. According to the invention, efficient utilization of industrial solid waste is realized, and the low-carbon environmental protection performance and mechanical property of the concrete are improved.

The invention relates to the technical field of building construction materials, in particular to low-carbon high-performance concrete and a preparation method thereof. The low-carbon high-performance concrete is prepared from the following preparation raw materials in parts by mass: 150 to 180 parts of Portland cement, 24 to 27 parts of sulphoaluminate cement, 120 to 150 parts of activated coal gangue powder, 60 to 80 parts of fly ash, 600 to 700 parts of gravel, 60 to 65 parts of modified basalt fiber, 20 to 25 parts of limestone powder, 10 to 12 parts of light calcined magnesia, 2 to 3 parts of accelerant, 7 to 10 parts of modified polycarboxylate superplasticizer and 180 to 220 parts of water. According to the low-carbon high-performance concrete disclosed by the invention, excellent mechanical properties and durability are ensured, the environmental protection targets of low cost and low carbon emission are achieved, and a new solution is provided for sustainable development of concrete materials.

The invention relates to the technical field of concrete, and discloses durable concrete and a preparation method thereof.The durable concrete is obtained by adding cement, gravel, fly ash, a polycarboxylate superplasticizer, quaternized triazinyl polyurethane, modified cyclodextrin and water into a stirrer and stirring the materials evenly. A quaternary ammonium salt group in the quaternized triazinyl polyurethane can effectively reduce the adsorption of the clay to the water reducing agent, so that the mixing amount of an additive is reduced, and the working performance and durability of the concrete are improved; wherein the triazinyl group has certain chemical stability and corrosion resistance, so that chlorine salt erosion of the concrete in a severe environment is reduced, and the service life of the concrete is prolonged.

The invention relates to the technical field of preparation of building materials, and discloses an ultra-high performance polycarboxylate superplasticizer for UHPC (Ultra High Performance Concrete). The superplasticizer composition comprises the following components in parts by weight: 20-30 parts of ethyl acrylate; 20 to 30 parts of sodium acrylate; the invention also provides a preparation method of the ultra-high performance polycarboxylate superplasticizer for UHPC, and the preparation method comprises the following steps: S1, raw material preparation: dissolving ethyl acrylate, sodium acrylate, sodium allylsulfonate, hexadecyl acrylate and diene peroxide in 50-100 parts of water to form a uniform solution; and S2, mixing and pre-polymerizing. By introducing nano silicon dioxide, an ultrasonic dispersion technology and a low-temperature vacuum dehydration technology, the dispersity and anti-permeability of the water reducing agent and the fluidity of concrete are improved, meanwhile, high strength is kept, and the problems that concrete is uneven in performance and poor in constructability are solved.

The invention relates to the technical field of concrete waterproofing agents, in particular to a high-efficiency concrete anti-crack waterproofing agent and a preparation method thereof, and the high-efficiency concrete anti-crack waterproofing agent is prepared from the following raw materials in parts by weight: a calcium sulphoaluminate expanding agent; light burning of magnesium oxide; re-burning the magnesium oxide; nano-scale silicon dioxide; metakaolin; polypropylene fibers; basalt fibers; styrene-acrylic emulsion; a silane emulsion; silica fume; hydroxypropyl methyl cellulose; and a polycarboxylic acid water reducer compatilizer. According to the high-efficiency concrete anti-crack waterproof agent disclosed by the invention, the nano-silica, the metakaolin and the styrene-acrylic emulsion synergistically block nano-to-macroscopic multi-stage pores, so that double waterproofing of physical filling and chemical film forming is realized; the polypropylene and the basalt fiber are subjected to ultrasonic dispersion and interface combination optimization to form a three-dimensional anti-crack network, the component uniformity and the functional stability are ensured through precise proportioning, graded mixing and directional granulation, meanwhile, the waterproof agent is compatible with industrial production fluctuation, large-scale application reliability is ensured, and the problems that a traditional waterproof agent is single in function and insufficient in durability are solved.

The invention belongs to the technical field of concrete, and particularly discloses an aerated concrete block and a preparation method thereof. The aerated concrete block is prepared from the following raw materials in parts by weight: 70 to 80 parts of water, 25 to 30 parts of Portland cement, 30 to 35 parts of sand, 3 to 5 parts of aluminum powder, 1 to 3 parts of polycarboxylate superplasticizer, 7 to 9 parts of lime, 10 to 15 parts of modified waste rubber powder, 10 to 12 parts of hollow glass beads and 12 to 16 parts of modified polystyrene fiber. The aerated concrete block prepared in the invention has good strength, compactness and tensile strength, and the strength, durability and stability of the aerated concrete block are improved.

The invention relates to a polycarboxylate superplasticizer compounding production line. The production line comprises an intelligent raw material pretreatment unit, a multi-component precise proportioning unit, a gradient temperature control compounding reaction unit, an online quality monitoring feedback unit and a finished product self-adaptive filling unit which are connected in sequence. The multi-component precise proportioning unit is internally provided with a dynamic proportioning adjusting system, and the feeding amount can be corrected according to the solid content deviation of raw materials and the target fluidity; the gradient temperature control compound reaction unit realizes temperature and speed coordinated regulation and control through a sectional temperature control module and a stirring speed linkage device; and the online quality monitoring feedback unit forms closed-loop control with the above two units by means of a near infrared spectrum detection module. The invention aims to solve the problem that the existing production line lacks the dynamic ratio adjustment of the actual solid content deviation of the raw material and the target fluidity, the reaction stage temperature control and stirring rate cooperative regulation and control and the online detection closed-loop control; therefore, the problems of low proportioning precision, poor reaction process controllability and large performance fluctuation of the water reducing agent are solved.

The invention relates to the technical field of composite bricks, and discloses a microcrystal bead efficient water-permeable composite brick and a preparation method thereof.The preparation method comprises the steps that ceramic shale particles, ceramic fine powder, white cement, a reinforcing agent and water are added into a stirrer, stirring and discharging are conducted, and a base layer is obtained; adding the natural colored sand, the modified polyurethane, the epoxy nano silicon dioxide, the quartz powder and the polycarboxylate superplasticizer into a stirrer, stirring, and uniformly paving on the base layer for extrusion forming. In the stirring process, a terminal hydroxyl group in the modified polyurethane reacts with an epoxy group in the epoxy nano silicon dioxide to generate a ring-opening reaction, so that the compatibility of the modified polyurethane and the epoxy group is increased, and the modified polyurethane and the epoxy nano silicon dioxide are more uniformly dispersed in the composite brick; the adamantane structure in the modified polyurethane has better stability, the mechanical property of the composite brick is improved, the durability of the composite brick is improved by the ferrocene group, and the durability and pressure resistance of the composite brick can be improved by the polyurethane.

The invention discloses green low-carbon ultra-high performance concrete with full-granularity steel slag and a preparation method of the green low-carbon ultra-high performance concrete. 800-1000 parts of an ultra-high performance concrete binding material and 1100-1400 parts of full-granularity steel slag are placed in a stirring pot and fully mixed; 2-5 parts of a polyether defoaming agent, 3-10 parts of a C-F-S-H crystal nucleus early strength agent, 15-20 parts of a high-performance polycarboxylate superplasticizer and 144-180 parts of water are added into a stirring pot and fully mixed; and adding 160-190 parts of superfine copper-plated steel fibers into the stirring pot, and fully mixing to obtain the green low-carbon ultra-high performance concrete. According to the green low-carbon ultra-high performance concrete with the full-granularity steel slag and the preparation method of the green low-carbon ultra-high performance concrete, the problems that in traditional UHPC, the consumption of silica fume is large, energy consumption is high, and carbon emission is high are solved.

The invention relates to the field of concrete admixtures, and particularly discloses an air-entraining type polycarboxylic acid water reducer and a preparation method thereof. The air-entraining type polycarboxylate superplasticizer is prepared from the following raw materials in parts by weight: 320 to 380 parts of unsaturated polyether macromonomer, 10 to 30 parts of air-entraining type functional monomer, 26 to 50 parts of unsaturated carboxylic acid or unsaturated carboxylic acid derivative, 1 to 4 parts of oxidizing agent, 0.5 to 2 parts of reducing agent, 0.6 to 2.8 parts of chain transfer agent, 18 to 30 parts of neutralizing agent and 500 to 600 parts of water, the preparation method of the air-entraining type functional monomer comprises the following steps: crushing maleated rosin, mixing the crushed maleated rosin with 48% liquid caustic soda, heating to 100-125 DEG C, carrying out heat preservation reaction for 1-2 hours, and adding water for dilution after the reaction is finished. According to the polycarboxylate superplasticizer, the air-entraining type functional monomer is added, so that the dispersity of the superplasticizer is not influenced, the polycarboxylate superplasticizer has relatively low air-entraining property, and the polycarboxylate superplasticizer has the advantages of improving the workability of concrete and increasing the freezing resistance and durability of the concrete at the same time.

The invention discloses a coal gangue-based reinforced cement composite material and a preparation method thereof, and relates to the technical field of building materials. The coal gangue-based reinforced cement composite material is prepared from a coal gangue-based reinforced admixture, calcium ion doped modified multi-walled carbon nanotubes, polypropylene fibers, P.O42.5 Portland cement, metakaolin, silica fume, a polycarboxylate superplasticizer and water, calcium ion doped modified multi-walled carbon nanotubes and a coal gangue based reinforced admixture are cooperatively added into a cement matrix, seamless filling from nanometer to micrometer is achieved, a tough interface transition area is formed, pressure is jointly borne by a compact matrix and a strong interface, the compressive strength and breaking strength of the material are remarkably enhanced, and meanwhile, the compressive strength and breaking strength of the material are greatly improved. Migration of moisture and ions is effectively blocked, and the anti-permeability performance of the material is improved.

The invention discloses a temperature control anti-cracking structure for mass concrete of a power plant and a construction method. According to the invention, the combination of the low-heat Portland cement and the composite admixture effectively reduces early hydration heat, reduces microcracks caused by thermal stress, and improves the compactness and stability of the concrete. And secondly, the compactness of the concrete is further ensured through reasonable grading of the machine-made sand and the granite macadam, and the structural integrity is enhanced. Functional additives such as a polycarboxylate superplasticizer and a magnesium oxide expanding agent not only improve the working performance of the concrete, but also offset the shrinkage stress through the delayed expansion effect, thereby effectively preventing the generation of cracks. In addition, due to the introduction of the phase change microcapsule material, the polypropylene fiber and the steel fiber, the temperature control and crack resistance of the concrete is remarkably enhanced through hydration heat absorption and double-fiber synergistic toughening.

The invention relates to the technical field of concrete admixtures, in particular to a high-performance polycarboxylate superplasticizer and a preparation method thereof. The high-performance polycarboxylate superplasticizer comprises the following components: a polycarboxylate superplasticizer and modified cellulose ether, the polycarboxylate superplasticizer is prepared by polymerization reaction of vinyl polyether macromonomer, unsaturated carboxylic acid and functional monomer under the action of initiator and chain transfer agent. According to the high-performance polycarboxylic acid water reducing agent provided by the invention, the polycarboxylic acid water reducing agent and the modified cellulose ether are compounded and applied to concrete, the initial fluidity of the concrete is good, the slump retaining property is good, the water-retaining property, the wrapping property and the cohesiveness of the concrete are good, and the segregation and bleeding phenomena are avoided when the concrete is mixed with the high-performance polycarboxylic acid water reducing agent.

The invention discloses concrete with high salt corrosion resistance and a preparation method of the concrete. The concrete is prepared from 300-400 kg / m < 3 > of cement, 50-150 kg / m < 3 > of slag powder, 1000-1200 kg / m < 3 > of gravel, 650-800 kg / m < 3 > of machine-made sand, 0.5-2 kg / m < 3 > of a modified polycarboxylic acid water reducing agent, 0.005-0.01 kg / m < 3 > of an air entraining agent, 0.05-0.1 kg / m < 3 > of an ion chelating agent, 0.05-0.1 kg / m < 3 > of polyacrylamide, 0.01-0.05 kg / m < 3 > of sodium methyl silicate, 0.1-0.5 kg / m < 3 > of multiwalled carbon nanotube dispersion liquid and 140-160 kg / m < 3 > of water. The preparation method comprises the following steps: stirring and mixing the modified polycarboxylate superplasticizer, the air entraining agent, the ion chelating agent, the polyacrylamide, the sodium methyl silicate and part of the water for mixing to obtain an admixture mixed solution; sequentially putting broken stones, cement, machine-made sand, the admixture mixed solution, the multi-walled carbon nanotube dispersion liquid and the rest of mixing water into a stirrer, and stirring for 2-3 minutes, so as to obtain the concrete with high salt corrosion resistance. The concrete has high salt corrosion resistance in a complex service environment, the service life of a concrete structure is effectively prolonged, and a reliable guarantee is provided for infrastructure construction.

The invention discloses a construction method of an all-solid-waste fluid-state curing porous micropore cast-in-place pile vibration isolation screen, and belongs to the technical field of vibration reduction and isolation of cast-in-place pile vibration isolation screens. According to parts by weight, a micropore cast-in-place pile in the all-solid-waste fluid-state curing porous micropore cast-in-place pile vibration isolation screen is formed by pouring all-solid-waste light foam soil slurry; the all-solid-waste light foam soil slurry is prepared from the following raw materials in parts by weight: 45 to 50 parts of pore-forming spoil, 5 to 10 parts of solid-waste-based curing agent, 4 to 6 parts of foaming agent, 0.15 to 0.2 part of water glass, 0.05 to 1 part of polycarboxylate superplasticizer, 0.05 to 1 part of foam stabilizer and 35 to 40 parts of water. The hole-forming waste residue soil is used for replacing borrowing soil, and the microporous and porous piles and the vibration isolation grooves are combined to replace a traditional vibration isolation wall, so that the vibration isolation wall has the advantages of being good in vibration reduction and isolation effect, low in cost, easy and convenient to construct and the like, and meanwhile has the advantages of saving resources, protecting the environment and the like.

The invention discloses hydrophobic modified unsaturated polyether for a polycarboxylic acid water reducer and a preparation method thereof, and the preparation method comprises the following steps: mixing vinylphenol substances, an organic amine catalyst and a polymerization inhibitor, under the protection of inert gas, heating to 60-90 DEG C, introducing ethylene oxide gas, and then curing for 10-60 minutes; cooling to 40 DEG C or below, adding a catalyst, heating to 100-130 DEG C under the protection of inert gas, continuously introducing ethylene oxide gas, and then curing for 10-60 minutes; adjusting the pH value of the reaction system to 7-9; unsaturated double bonds in the hydrophobic modified unsaturated polyether are connected with a benzene ring, compared with EPEG polyether, the charge environment of the double bonds is greatly improved, the activity of the double bonds is improved, the dropwise adding time of acrylic acid during synthesis of the polycarboxylate superplasticizer can be greatly shortened, the hydrophobicity of the benzene ring is high, the HLB value of the polyether can be reduced, and the hydrophobic property of the polyether is improved. Therefore, the viscosity of the concrete is reduced.

The invention discloses a viscosity-reducing fast-dispersing polycarboxylate superplasticizer for high-strength concrete and a preparation method thereof, and relates to the technical field of polycarboxylate superplasticizers. The viscosity-reducing fast-dispersing polycarboxylic acid water reducer for the high-strength concrete comprises the following components in parts by weight: 400 parts of unsaturated polyether macromonomer, 20-40 parts of unsaturated acid monomer and 10-20 parts of unsaturated functional monomer. The invention also provides a preparation method of the polycarboxylate superplasticizer. The water reducer can reduce the viscosity of high-strength concrete, improve the dispersing performance of the concrete and shorten the mixing time, so that the problems of high plastic viscosity and the like of the concrete are solved under the condition of not reducing other performances such as the strength of the concrete.

The invention discloses a C6 monomer polycarboxylate superplasticizer and a preparation method thereof. The C6 monomer polycarboxylate superplasticizer is prepared from the following raw materials in parts by mass: 300-380 parts of C6 ethylene glycol monovinyl polyglycol ether polyether macromonomer, 7.5-11.0 parts of acrylic acid, 0.3-1 part of chain transfer agent, 0.15-1.0 part of reducing agent and 0.6-1.2 parts of oxidizing agent. The water reducing agent prepared by the invention has the advantages of simple process, energy conservation, environmental protection, shortened synthesis time, improved production efficiency, high adaptability and better water reducing property.

The invention discloses concrete cured by CO2 and a preparation method of the concrete, and belongs to the technical field of building materials. The concrete comprises the following components in parts by weight: 350-500 parts of a cementing material; 50 to 200 parts of a CO2 load substance; 600 to 800 parts of fine aggregate; 700 to 1000 parts of coarse aggregate; 5-20 parts of a polycarboxylate superplasticizer; and 130 to 170 parts of water. According to the invention, the CO2 load with a double-layer phase change structure is utilized to realize the controlled release of CO2 in stages, the gradually slowly released CO2 and the cementing material are subjected to mineralization reaction to form carbonized products, namely calcium carbonate and silica gel, so that the densification of a matrix is promoted, and the strength, hardness and durability are further improved; the slow-release CO2 curing reduces the energy consumption caused by autoclaved curing of the concrete, greatly shortens the curing time, reduces the production cost and improves the production efficiency.

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 low-carbon red-mud-based alkali-activated foam concrete and a preparation method thereof, and belongs to the field of low-carbon foam concrete. Specifically, the mix proportion and the preparation method of the low-carbon red-mud-based alkali-activated foam concrete are as follows: P.O42.5 ordinary Portland cement provided by building materials in Qingdao Weidong macro, the I-grade fly ash is S95-grade granulated blast-furnace slag produced by Henan Province Platinon Casting Material Co., Ltd., and Jinshu New Material Co., Ltd., the I-grade fly ash is S95-grade granulated blast-furnace slag produced by Henan Province Platinon Casting Material Co., Ltd. The Bayer process red mud powder is produced by Hebei Province Shihozhuangfei Mine Product Co., Ltd. The exciting agent is selected from an industrial liquid sodium silicate solution produced by Henan Jinmoistening New Material Co., Ltd. And solid sodium hydroxide particles with AR analytical purity of 96%; the admixture is selected from a TR-26C type polycarboxylate superplasticizer produced by Henan Fuhua Information Science and Technology Co., Ltd. And the foaming agent is a TR-E type animal protein foaming agent produced by Henan Zhuichun Information Science and Technology Co., Ltd. Compared with existing foam concrete, the low-carbon alkali-activated foam concrete provided by the invention uses a large amount of industrial solid waste, reduces the use cost, reduces the use amount of cement under the condition of ensuring the compressive strength, and is simple and convenient to operate, reasonable in process, low-carbon, environment-friendly, rapid in cement setting and hardening, and suitable for large-scale use.

The invention belongs to the field of light low-carbon concrete, and discloses hydraulic low-carbon concrete containing barium sulfate barite as well as a preparation method and application of the hydraulic low-carbon concrete. The concrete is prepared from 42.5-grade Portland cement, barium sulfate barite powder, modified polypropylene fiber, industrial waste residue lightweight aggregate, boron carbide powder, nano silicon dioxide, a polycarboxylate superplasticizer, a composite exciting agent and water according to specific parts by weight. Wherein the barium sulfate barite powder is subjected to graded proportioning and calcination activation, the modified polypropylene fiber is treated by plasma and a silane coupling agent, the industrial waste residue lightweight aggregate is formed by compounding fly ash ceramsite and steel slag microbeads, and the composite exciting agent is composed of specific components. The concrete is high in compressive strength, low in dry density, excellent in neutron shielding and gamma ray attenuation performance and low in chloride ion diffusion coefficient. The preparation method comprises the steps of premixing modification, gradient stirring, vibration compaction and steam curing. The concrete is suitable for construction of a nuclear reactor containment, a radioactive waste repository and a nuclear medicine protection wall.

The invention relates to the technical field of polycarboxylate superplasticizers, and discloses a durability-enhanced polycarboxylate superplasticizer and a preparation method thereof.The preparation method comprises the following steps that raw materials such as a polyether macromonomer are prepared, the polyether macromonomer and the like have the requirements for purity and dosage, deionized water and the polyether macromonomer are added into a reaction kettle to form a solution A, and the solution A is prepared; and preparing an initiator solution B with the mass concentration of 10-20% from ammonium persulfate, heating to 60-80 DEG C, stirring, firstly adding 1 / 3 of the initiator solution B to react, then preparing a mixed monomer solution from acrylic acid and the like, dropwise adding the mixed monomer solution and the residual initiator solution B within 2-3 hours, carrying out heat preservation reaction, cooling, and regulating the pH value to 6-8 by using sodium hydroxide to obtain a finished product. The sulfonic acid group of the introduced sodium methallyl sulfonate functional monomer can enhance the electrostatic repulsion between water reducer molecules and cement particles, so that the dispersing performance of the water reducer is improved, the agglomeration of the cement particles can be inhibited to a certain extent, and the fluidity of concrete can be maintained.

The invention discloses polycarboxylic acid water reducing agent powder production equipment, and relates to the technical field of polycarboxylic acid water reducing agent equipment, the polycarboxylic acid water reducing agent powder production equipment comprises a reaction kettle, a water inlet pipe is arranged at the top of the reaction kettle, a feeding pipe is arranged at the top of the reaction kettle, a control valve is arranged at the bottom of the reaction kettle, and a sliding groove is formed in the inner wall of the reaction kettle; the device further comprises a stirring mechanism; wherein the stirring mechanism comprises a servo motor, a rotating rod, a connecting rod, stirring fan blades, a carrying plate, a sliding plate, a first spring, a cylindrical rod, a round block, an abutting plate and a supporting plate, the servo motor fixedly penetrates through the top of the reaction kettle, the rotating rod is fixedly installed at the output end of the servo motor, the position is automatically adjusted through the cylindrical rod when the cylindrical rod encounters cakes, and the cylindrical rod is fixed to the top of the reaction kettle; and then stable pressure is applied to press and disperse the cakes, so that the uniformity of the reaction process is favorably improved.

The invention discloses a high-toughness grouting material and a preparation method thereof, and belongs to the technical field of building materials. The photochromic thermal insulation material is prepared from the following raw materials in percentage by mass: 30 to 36 percent of sulphoaluminate cement, 28 to 32 percent of quartz sand, 0.4 to 0.9 percent of nano graphene / carbon tube hybrid, 12 to 15 percent of superfine composite admixture, 1.0 to 1.8 percent of temperature-sensitive shape memory alloy fiber, 1.5 to 2.0 percent of microbial self-repairing capsule, 15 to 18 percent of photochromic epoxy hybrid emulsion, 0.2 to 0.35 percent of polycarboxylate superplasticizer and 0.8 to 1.2 percent of magnetic iron oxide coated SiO2 expanding agent. According to the invention, the active inhibition that the crack width is less than or equal to 0.05 mm is realized through the shrinkage compensation of the magnetic field oriented expanding agent, the temperature-sensitive fiber phase change toughening and the photochromism-microorganism synergistic repair.