703 results about "Acid water" patented technology

The invention discloses ultra-high performance concrete and a preparation method thereof. The ultra-high performance concrete comprises the following components in percentage by mass: 15%-25% of cement, 3%-6% of nano SiO2, 30%-35% of fly ash or steel slag powder, 35%-40% of recycled aggregate, 1%-4% of fiber, 0.5% of a microbial remediation agent and 1%-3% of nano TiO2. The preparation method comprises the following steps: S1, pretreating the recycled aggregate; and S2, packaging the microbial remediation agent: mixing the bacillus pasteurii spores with calcium lactate, and wrapping the mixture in calcium phosphate microspheres. S3, step-by-step stirring; S3.1, dry mixing: uniformly stirring the cement, the fly ash, the nano SiO2, the nano TiO2 and the recycled aggregate; s3.2, wet mixing is carried out, water solution fibers containing the polycarboxylic acid water reducing agent are added, uniform stirring is carried out, and the water-binder ratio of the water solution containing the polycarboxylic acid water reducing agent is 0.18; s3.3, final mixing: adding the packaged microbial remediation agent, and uniformly stirring; and S4, directional curing: performing steam curing at 80 DEG C for 48 hours, performing ultraviolet irradiation, and performing constant-temperature and constant-humidity curing for 7 days. The ultra-high performance concrete has the effects of low cost, low carbon emission, multi-function integration and repeatable crack self-repairing.

The invention provides a modified coal gangue-based large-flow-state grouting and water plugging material and a preparation method thereof. Comprising 80-90 parts of a coal gangue sample, 1-5 parts of Portland cement, 1-5 parts of sulphoaluminate cement, 0.51-3 parts of a polycarboxylic acid water reducing agent, 1-4 parts of cellulose ether with the viscosity of 200w, 0.1-5 parts of a calcium oxide expanding agent, 0.5-5 parts of a plastic expanding agent, 0.5-1 part of redispersible latex powder, 0.5-5 parts of polyacrylamide with the molecular weight of 1000 and water, and the water-material ratio is 0.4. According to the modified coal gangue-based large-flow-state grouting and water plugging material and the preparation method thereof, the cement consumption can be remarkably reduced, the cost is reduced, the utilization rate of solid wastes (such as coal gangue) is increased, and the material has good flow-state performance and adjustable setting time; the method is suitable for deep and large shaft surrounding rock water seepage treatment in coal mining and other mine engineering.

The invention relates to the technical field of water treatment, and discloses a direct spraying type waste heat recovery acidic water treatment method. The method comprises the following steps: arranging a pH value difference sensor group and a conductivity sensor at a joint of a buried pipe cold storage system and a direct-spraying type waste heat recovery device, and monitoring the whole process of acid water treatment in real time to obtain water quality change data of the acid water; performing filtering treatment and working condition matching analysis on the acid water quality change data and the system operation parameters to obtain a cold storage-acid water treatment cooperation mode; performing thermochemical coupling analysis through the hyperboloid mapping network to obtain a corrosion risk assessment result; and executing the heat exchange efficiency and pH value adjustment dual-constraint optimization model according to a corrosion risk assessment result, and outputting an anti-corrosion control strategy. According to the method, the complex nonlinear relation between the pH value change and the temperature gradient can be accurately captured, the accuracy of corrosion risk prediction is greatly improved, and damage to equipment caused by corrosion is effectively avoided.

The invention discloses high-performance fluid-state solidified soil for backfill based on composite ardealite of building residue soil, which is prepared by taking the building residue soil as a core raw material, taking a compound of a polycarboxylic acid water reducer and hydroxypropyl methyl cellulose as a fluidization regulator, and mixing the fluidization regulator and the building residue soil to prepare the high-performance fluid-state solidified soil for backfill. Superfine slag powder, fly ash, nano silicon dioxide, metakaolin and ardealite are used as curing agents, so that the fluid-state solidified soil with strong performance is obtained. Through the synergistic effect of all the components and innovative processes such as liquid nitrogen low-temperature grinding, nano material compounding and a segmented vacuum stirring process, the effect that the ultrahigh strength of the construction waste soil reaches 7.5 MPa within 14 days is achieved for the first time and is improved by 40% or above compared with that of conventional solidified soil, and the industrial problem that traditional waste soil is insufficient in solidification strength is solved; and collaborative optimization of strength and fluidity is realized. Meanwhile, efficient resource utilization of the construction waste is achieved, land occupation and environmental pollution caused by muck landfill are greatly reduced, and the requirement for green and sustainable development is met.

The invention discloses multi-scale toughened full-solid-waste ultrahigh-ductility concrete, which is prepared from the following raw materials in parts by weight: 500 to 650 parts of full-solid-waste cementing materials, 110 to 150 parts of calcined coal gasification slag, 190 to 250 parts of calcined fly ash, 20 to 40 parts of silica fume, 10 to 30 parts of metakaolin, 780 to 930 parts of washed sand, 10 to 25 parts of fly ash fibers, 0.6 to 0.9 part of hydroxypropyl methyl cellulose, 20 to 30 parts of polycarboxylic acid water reducing agents and 300 to 400 parts of water. The calcined coal gasification slag is subjected to gradient heating to 800-960 DEG C, heat preservation is conducted for 30-60 min, then the calcined coal gasification slag is cooled to the room temperature at the cooling rate of 10-15 DEG C / min, and the calcined coal gasification slag is obtained after powder grinding. According to the multi-scale toughened full-solid-waste ultrahigh-ductility concrete provided by the invention, the toughness and the mechanical property of the concrete can be enhanced, the performance of the concrete in an extreme environment is improved, meanwhile, the solid waste utilization rate is increased, and the production cost of the concrete is reduced.

The utility model relates to a system for reducing the acid value of hydrolysate in the separation and washing process of dimethyl dichlorosilane hydrolysate. Comprising three stages of coalescers, dimethyl dichlorosilane acidic hydrolysate enters the system from the first stage of coalescer, process water enters the system from the third stage of coalescer, the acidic hydrolysate and diluted hydrochloric acid or process water are mixed in each stage of coalescer, oil-water two-phase separation is completed through multiple times of washing and coalescence, and meanwhile the acid value of the hydrolysate is reduced; each stage of coalescer comprises two static mixers connected in series, a group of prefilters and a large coalescer, the coalescer is Z-shaped, and four stages of filter elements are arranged in each stage of coalescer. Through repeated tests, a modified polyvinylidene fluoride filter element of Pall Company is finally selected, and after continuous three-stage coalescer treatment, the acid value of dimethyldichlorosilane hydrolysate can be reduced to 10 PPM or below.

The invention discloses a nano composite cement-based material and a preparation method, and belongs to the technical field of cement-based rapid repairing materials, the material comprises the following components by weight: 1000-1200 parts of high belite sulphoaluminate cement, 525-700 parts of nano activated fly ash, 465-600 parts of superfine slag, 45-78 parts of steel fiber, 28-63 parts of an expanding agent, 15-30 parts of a temperature-sensitive polycarboxylic acid water reducer, 78-95 parts of self-repairing microcapsules, and 284-325 parts of water. Wherein the self-repairing microcapsule is of a double-capsule-core and double-capsule-wall structure. The preparation method comprises the following steps: preparing the self-repairing microcapsule, mixing the cementing material, adding the water reducing agent and water, stirring, adding the microcapsule and the expanding agent, stirring, curing and the like. According to the invention, through a synergistic enhancement technology of a composite gel system, a multi-dimensional enhanced network and an environmental response technology, the material has the characteristics of rapid hardening and early strength, can be demolded within 2 hours, and solves the problems of long initial setting time, poor crack resistance, lack of self-repairing capability, high maintenance frequency and the like in repairing of the airfield pavement in the arid region.

The invention belongs to the technical field of building materials, and particularly relates to a micro-expansion anti-cracking waterproof composite deep groove filler and a preparation method thereof. The micro-bulking anti-cracking waterproof composite deep groove filler provided by the invention comprises cement, gypsum, mineral powder, nano silicon oxide, coarse aggregate, fine aggregate, modified fibers, an expanding agent, a polycarboxylate superplasticizer and water. According to the invention, polyacrylamide, calcium sulphoaluminate and magnesium oxide are adopted to jointly form an expanding agent, and early-stage-late-stage full-period shrinkage compensation is jointly formed in a concrete hydration process, so that the density of the concrete is effectively improved, and the waterproof performance of the concrete is further improved; according to the invention, sodium dodecyl benzene sulfonate and propylene glycol block polyether are adopted to carry out compound modification on graphene oxide, and gamma-aminopropyltriethoxysilane is connected to the surface of basalt fiber, so that the bonding strength of basalt fiber and a cement matrix and the compactness of the cement matrix are improved, and the waterproof and anti-cracking properties of concrete are further improved.

The invention discloses a super-early-strength shrinkage-free high-crack-resistance tunnel spraying repair material in the technical field of civil engineering materials, which comprises the following raw materials in percentage by mass: 35-45% of sulphoaluminate cement; 8%-12% of a superfine early strength admixture; 2%-3% of a calcium sulphoaluminate expanding agent; 1%-2% of a magnesium oxide-based expanding agent; 1-2% of a calcium-magnesium composite expanding agent; 10%-15% of hollow glass beads; 1.5%-2.5% of copper plated steel fiber; 0.1%-0.3% of polypropylene fiber; 25%-30% of graded quartz sand; 0.5%-1.0% of a polycarboxylic acid water reducing agent; 3%-5% of an alkali-free liquid accelerator; 0.3%-0.8% of a thixotropic agent; and 0.1%-0.3% of a thickening time control agent. According to the method, a multi-scale performance cooperative regulation system is innovatively constructed. Through accurate control of the hydration process of a gel system, a shrinkage stress multi-stage compensation mechanism and systematic integration of a fiber-matrix interface strengthening technology, the mutual restriction relationship among early strength development, volume stability and crack resistance of a traditional material is broken through.

The invention relates to the technical field of building materials, in particular to light water-resistant phosphogypsum-based cement concrete mortar and a preparation process thereof. The phosphogypsum-based cement concrete mortar comprises the following components: activated phosphogypsum, sulphoaluminate cement, magnesium phosphate cement, modified zeolite powder, lightweight aggregate, modified nano silicon dioxide, a core-shell toughening agent, a polycarboxylate superplasticizer and water, and the preparation method comprises the following steps: respectively preparing the activated phosphogypsum, the modified zeolite powder, the modified nano silicon dioxide and the core-shell toughening agent; the water resistance of the ardealite is improved through activating treatment, the interface bonding force and the structural compactness are enhanced through multi-component synergism by means of selective adsorption of the modified zeolite powder, the mechanical property of the lightweight aggregate is optimized, the toughness is improved through the core-shell toughening agent, and lightweight, high water resistance, stable performance and durability improvement of the mortar are achieved; the requirements of complex building scenes are met, and environment-friendly and practical values are achieved.

The invention belongs to the technical field of constructional engineering materials, and particularly relates to anti-corrosion concrete as well as a preparation method and application thereof. The anti-corrosion concrete is prepared from the following raw materials: Portland cement, fly ash, mineral powder, coarse sand, gravel, a polycarboxylic acid water reducer, an early strength agent, an air entraining agent, imidazolium ionic liquid and carbon modified g-C3N4. The imidazolium ionic liquid and the carbon modified g-C3N4 are added into the concrete, so that the compressive strength and the corrosion resistance of the concrete can be coordinately improved, and the prepared concrete is particularly suitable for the fields of municipal drainage systems and the like with high corrosion resistance requirements on concrete materials.

The invention discloses a water-based nano anti-crack waterproof agent for concrete and a preparation method of the water-based nano anti-crack waterproof agent, and relates to the field of building materials. 10 to 25% of a silane emulsion; 20-40% of an acrylate copolymer emulsion; 0.5 to 5% of modified nano cellulose; 3-8% of a polycarboxylic acid water reducer; 0.1-1% of a defoaming agent; and the balance of water. Nano silica sol permeates concrete capillary pores and participates in a hydration reaction to improve the compactness of a matrix, a three-dimensional toughening network is constructed in cooperation with oriented crosslinking of carboxyl on the surface of TEMPO oxidized nano cellulose and gamma-aminopropyl silane, and micro cracks are covered with a flexible sealing layer formed by an acrylate copolymer. Active inhibition of cracks and long-acting blocking of water are synergistically realized, shearing force is regulated and controlled in a segmented manner through a stepped stirring process, the demulsification risk of an emulsion is avoided, and the storage stability of a system is remarkably improved.

The invention relates to the technical field of building material processing, in particular to a granulation processing device for a polycarboxylate superplasticizer and an assembly thereof.The granulation processing device comprises a base, first supporting plates are fixedly connected to the four corners of the top of the base, second supporting plates are fixedly connected to the inner sides of the first supporting plates, and a light barrel is fixedly connected to the inner wall of each second supporting plate; an outer gear ring is fixedly connected to the surface of the light barrel, and a cooling component is arranged on the front side of the second supporting plate. According to the invention, the efficient and uniform granulation process is realized through the innovative mechanical linkage design, the device adopts a rotary cooling and self-cleaning integrated structure, the light barrel body is driven by the motor to rotate, and meanwhile, the condensation ring reciprocates up and down along the barrel wall to form a dynamic cooling effect, so that the uniform and stable temperature of materials is ensured, and the material discharge stage is stable. Falling materials drive the impeller to rotate, the composite material cleaning ring is driven by the gear and rack mechanism to scrape the barrel wall up and down, and residual materials are effectively removed.

The invention discloses proportioning and feeding equipment for preparing a polycarboxylate superplasticizer and a feeding method of the proportioning and feeding equipment, and relates to the technical field of polycarboxylate superplasticizer preparation, the proportioning and feeding equipment comprises a feeding tank body and a bearing bracket fixedly mounted below the outer part of the feeding tank body; a proportioning mechanism is arranged at the upper part in the feeding tank body, and the proportioning mechanism comprises a proportioning chassis; wherein the proportioning partition plates are distributed in an equal-angle manner; a feeding mechanism is arranged at the bottom of the proportioning chassis, the feeding mechanism comprises a feeding shaft barrel, and a telescopic sliding rod is arranged on the outer side of the bottom end of the feeding shaft barrel. According to the proportioning and feeding equipment for preparing the polycarboxylate superplasticizer and the feeding method of the proportioning and feeding equipment, various raw materials are stored through the areas separated by the proportioning partition plates in the feeding tank body, so that proportioning and feeding are performed under various requirements, and meanwhile, the mixing branches below the feeding tank body and the inclined scraping plates assist proportioning and mixing of the various raw materials; the preparation efficiency of the polycarboxylate superplasticizer is improved.

The invention discloses premixed flow-state solidified soil and a preparation method thereof, and the premixed flow-state solidified soil comprises the following components in parts by weight: 100 parts of silty clay; 8 to 15 parts of a curing agent; 48 to 90 parts of water; wherein the curing agent comprises the following components: 10 to 15 parts of sulphoaluminate cement; 40 parts to 55 parts of superfine steel slag powder; 30 to 40 parts of fly ash; 0.5 to 1.5 parts of sodium silicate; 0.1 to 0.3 part of a foaming agent; 0.1 part to 0.2 part of sodium thiocyanate; 0.1 part to 0.2 part of hydroxymethyl cellulose; 0.05 part to 0.2 part of triisopropanolamine; 0.1 part to 0.5 part of calcium nitrate; and 0.5 to 1 part of a polycarboxylic acid water reducing agent. The preparation method of the premixed flow-state solidified soil is suitable for using silty clay as a raw material, and greatly improves the strength, compactness, fluidity and other properties of the premixed flow-state solidified soil.

Described herein are methods for making alkenyl disiloxanes, comprising combining an alkenyl halosilane with an alkyl halosilane and adding the mixture to water, an acidic aqueous solution, or a basic aqueous solution. The ratio of the alkenyl halosilane to the alkyl halosilane is about 10:1 to about 1:10. The alkenyl halosilane and the alkyl halosilane are mixed at about 20° C. to about 45° C. The reaction product is separated and washed with saturated alkali carbonate solution.

The invention relates to a preparation technology of a cement-based repairing material, and aims to provide a double-component high-strength repairing mortar material and a preparation method thereof. The repairing mortar material comprises two components: a component A, a component B and a component C, wherein the component A is composed of modified cement, sulphoaluminate early strength cement and water-based resin; the component B is prepared from silica fume, silane, cellulose ether, redispersible latex powder, short fibers, a polycarboxylic acid water reducing agent and a defoaming agent; and river sand with the same amount as the component A can be further included. The silicane is used for modifying the silica fume, and a silanol group and a silicon hydroxyl group on the surface of the silica fume are subjected to dehydration condensation to form a stable Si-O-Si covalent bond, so that the adsorbability of the modified silica fume to water is reduced, and the risk of cracking of the repair mortar is avoided. The component B can be used as an auxiliary component for curing the water-based resin in the component A to control the setting time of the repair mortar, improve the early strength of the mortar added with the water-based resin and improve the weather resistance of the water-based resin; the overall strength of the mortar can be improved, and the production cost of the repairing mortar is reduced.

The invention provides an ester-ether copolymerization type slump-retaining polycarboxylic acid water reducer and a preparation method of the ester-ether copolymerization type slump-retaining polycarboxylic acid water reducer. The water reducing agent is prepared from the following raw materials in parts by weight: 80 to 120 parts of main chain macromonomer, 20 to 35 parts of unsaturated carboxylic acid, 1.5 to 3.2 parts of initiator, 0.2 to 0.5 part of reducing agent, 0.3 to 0.8 part of chain transfer agent, 8 to 15 parts of neutralizer, 200 to 300 parts of solvent, 5 to 10 parts of diphosphonic polyether monomer, 3 to 6 parts of temperature-sensitive dynamic crosslinking monomer and 2 to 5 parts of amide-ether bond grafting monomer. The water reducer has the comprehensive performance of dispersion, slump loss resistance, mud resistance, high-temperature response and the like.

The invention relates to a polycarboxylic acid water reducer and a preparation method thereof, and the water reducer is prepared from the following raw materials: 45 to 55 percent of isopentenyl polyoxyethylene ether, 28 to 35 percent of acrylic acid, 1.5 to 2.5 percent of modifier, 0.3 to 0.5 percent of ammonium persulfate, 0.03 to 0.06 percent of ascorbic acid, 5 to 8 percent of hydroxyethyl methylacrylate, 0.15 to 0.25 percent of 2, 4-diphenyl-4-methyl-1-pentene and the balance of water. The modifier is prepared from the following raw materials: 1, 5-dichloronaphthalene, p-nitrostyrene, dimethyl sulfate, ceric ammonium nitrate and tetramethylpiperidine oxide. The polycarboxylate superplasticizer has excellent neat paste fluidity and fluidity retention capability, has low 1h time-dependent variable slump which is below 18mm and optimally 10mm when applied to concrete, has a water-reducing rate of more than 40% and a gas content of less than 3.8%, and also has more advantages in compressive strength ratio.

The invention relates to the technical field of building repairing materials, and particularly discloses an anti-impact and wear-resistant repairing material and a preparation method thereof.By optimizing the content of all the components of the raw materials, the prepared repairing material has excellent anti-erosion performance and wear-resistant performance, Portland cement serves as a main cementing material, and the anti-impact and wear-resistant performance of the repairing material is improved; basic strength and cohesiveness are provided; fly ash and silicon powder synergistically enhance compactness and durability; quartz sand is used as wear-resistant aggregate, so that the compression resistance and the wear resistance are improved; the toughness and the impact resistance are enhanced by the composite modified carbon fibers; the redispersible latex powder improves the flexibility and the binding power; the polycarboxylate superplasticizer optimizes the flowability and improves the compactness; and the defoaming agent reduces pore defects and ensures material uniformity. The repair material provided by the invention is suitable for repair engineering needing to bear mechanical shock or wear environment, and has good construction performance.

The invention relates to the technical field of building materials, and particularly discloses an aluminate amorphous strength accelerator for steam-curing-free concrete as well as a preparation method and application of the aluminate amorphous strength accelerator. The invention discloses an aluminate amorphous strength accelerator for steam-curing-free concrete. The aluminate amorphous strength accelerator is prepared from the following raw materials in parts by weight: 35 to 45 parts of calcium aluminate amorphous powder, 55 to 65 parts of high-activity gypsum, 1 to 2 parts of an early strength type powder polycarboxylic acid water reducing agent, 0.1 to 1 part of lithium salt, 0.1 to 0.5 part of a retarder, 0.02 to 0.05 part of a reinforcing agent and 1 to 3 parts of a nano early strength agent, the proportion of amorphous glass in the calcium aluminate amorphous powder is greater than 85%; the calcium aluminate amorphous powder and the high-activity gypsum are doped into the Portland cement for synergistic hydration, and the early strength type powder water reducing agent, the lithium salt, the reinforcing agent and the nano early strength agent are utilized for synergistic interaction, so that the early strength and the volume stability of the prefabricated part are improved.

The invention discloses a novel composite filling material for a coal mine and a preparation method thereof, and relates to the technical field of coal mine filling materials, the novel composite filling material comprises the following raw materials: a main gel system: magnesium slag powder, sulphoaluminate cement, calcined desulfurization gypsum, ordinary portland cement and fly ash; the pore and water locking system comprises water-absorbent resin and expanded perlite; the additive system comprises a composite additive, a polycarboxylic acid water reducer, hydroxypropyl methyl cellulose and sodium alginate; the sodium alginate is composite sodium alginate composed of high G type sodium alginate and low G type sodium alginate; by optimizing the component proportion and the preparation process and establishing an ordered construction mechanism of a gel network, the homogeneity, the stability and the mechanical property of the material are improved while high fluidity is maintained, and the material has a loose and light porous structure, shows relatively low density and good light property, and has good application prospects. And under the condition of high water-solid ratio, the concrete has excellent bleeding resistance, reasonable coagulation characteristic and continuous strength development capability.

The invention provides a retarding type polycarboxylate superplasticizer as well as a preparation method and application thereof, and belongs to the technical field of building material concrete admixtures. The retarding type polycarboxylic acid water reducing agent is prepared from the following raw materials in parts by weight: 300 to 400 parts of polyether macromonomer, 60 to 150 parts of unsaturated carboxylic acid micromonomer, 30 to 60 parts of unsaturated sulfonic acid monomer, 15 to 30 parts of alkylphenol polyoxyethylene ether phosphate, 1.5 to 12 parts of chain transfer agent, 2 to 15 parts of initiator, 15 to 50 parts of caustic soda liquid and 200 to 600 parts of solvent. The polycarboxylic acid water reducing agent product with the retarding characteristic is synthesized through an RAFT method, the binding force between phosphate radicals and calcium ions in a cement pore liquid of the preparation raw material alkylphenol polyoxyethylene ether phosphate is high, hydration of C3A and formation of ettringite are delayed, the retarding effect of the water reducing agent is enhanced, and the polycarboxylic acid water reducing agent has the anion characteristic and the nonionic characteristic and can be used as a water reducing agent. And the workability of the concrete is improved.

The invention discloses high-strength recycled concrete mortar and a preparation method thereof, and relates to the technical field of recycled concrete mortar. The high-strength recycled concrete mortar is prepared from the following components in parts by weight: 25 to 34 parts of cement, 2.5 to 3.4 parts of silica fume, 8 to 12 parts of modified aerogel particles, 12 to 18 parts of recycled fine aggregate, 0.08 to 0.12 part of polycarboxylic acid water reducer, 24 to 32 parts of PCM and 6.25 to 8.5 parts of slag. The heat conductivity coefficient is reduced through the high aerogel content of the surface layer, the temperature buffering capacity is enhanced through the high PCM proportion of the inner layer, a silane coupling agent is sprayed on an interface during layered pouring to form chemical bonds, the contradiction of single-layer structure performance is solved, silicon hydroxyl is introduced into modified aerogel particles through the silane coupling agent, the surface contact angle is increased to 110 degrees, and the thermal conductivity is improved. And C-S-H gel is generated with a cement hydration product, so that the problem of compatibility is solved.

The invention discloses a sprayable ECC for early-strength tunnel repair and a preparation method thereof. The sprayable ECC comprises the following components in parts by mass: 300-380 parts of Portland cement clinker, 25-40 parts of silica fume, 30-50 parts of superfine slag, 100-150 parts of quartz sand, 5-15 parts of a polycarboxylic acid water reducer, 5-10 parts of a nano CSH crystal nucleus suspension, 5-15 parts of mixed fibers, 0.4-1.2 parts of a polyether defoamer and 10-16 parts of an accelerator. And 72-92 parts of tap water. The jettable ECC has the technical requirements of ultrahigh early strength, ultrahigh ductility and jettable performance.

This invention provides a solid waste-based backfill material for improving heavy metal leaching rate and its preparation method. The backfill material comprises the following raw materials in parts by weight: 40-60 parts Bayer red mud, 40-60 parts fly ash, 10-20 parts desulfurized gypsum, 5-8 parts nano-hydroxyapatite, 4-6 parts pumping agent, and 30-60 parts water. The pumping agent is a compound of organosilicon polycarboxylic acid water-reducing agent, polymaleic acid, and thiol-modified cellulose in a mass ratio of 4-6:3:10-12. The thiol-modified cellulose is prepared by a method including the following steps: dissolving carboxymethyl cellulose in water, adding aminothiol compounds, adjusting the pH, adding activators and activating aids, and reacting under controlled temperature. After the reaction, acetone is added until no precipitation occurs. The mixture is then filtered, washed, and dried to obtain thiol-modified cellulose. The heavy metal leaching performance of the backfill material is improved by introducing hydroxyapatite, which can both precipitate and adsorb heavy metals.

The invention discloses a polycarboxylate superplasticizer with a linear water-reducing rate as well as a preparation method and application of the polycarboxylate superplasticizer. The water reducing agent is prepared from a polyether macromonomer phosphating derivative, a carboxylic acid monomer, a sulfonic acid monomer, an ester slump retaining monomer, a linear regulation and control monomer and other units through a free radical emulsion polymerization process. Compared with a traditional polycarboxylic acid water reducer, the water reducer has more regular side chain arrangement, higher charge density, higher adsorption capacity and more stable dispersing performance, the water-reducing rate can be linearly increased along with the increase of the mixing amount within the effective mixing amount range, and the water-reducing efficiency is improved. The problem that the concrete fluidity is difficult to control due to nonlinear fluctuation of the water reducing rate of a traditional polycarboxylic acid water reducing agent is solved, and the method has important significance on improving the concrete construction stability and the engineering quality. The product provided by the invention has excellent mud resistance and slump loss resistance besides high linear water-reducing rate, is suitable for various cast-in-place and precast concrete projects, and has remarkable economic value and application prospect.

The invention discloses a high-abrasion-resistance concrete additive as well as a preparation method and application thereof, and belongs to the technical field of concrete additives. The invention discloses a concrete additive with high abrasion resistance. The concrete additive is prepared from the following raw materials in percentage by mass: 30-40% of silica fume, 15-20% of mineral powder, 8-12% of nano silicon carbide, 2-8% of zirconium oxide microspheres, 10-15% of a polycarboxylic acid water reducer, 3-5% of an organic silicon water repellent, 2-5% of nano titanium dioxide and 5-10% of a modified bamboo-based material. The anti-abrasion additive prepared by the invention can ensure that the permeability coefficient is greater than or equal to 0.5 mm / s while ensuring the high anti-abrasion performance of concrete, is suitable for engineering scenes such as permeable pavements and the like with strict requirements on water permeability, and realizes the synergistic improvement of high water permeability (greater than or equal to 0.5 mm / s) and ultrahigh anti-abrasion performance (the strength ratio is greater than or equal to 140%) of the concrete; the problem that the water permeability and the abrasion resistance of traditional concrete cannot be synchronously improved at the same time is successfully solved.

The application provides a solid waste-based high-fluidity filling material and a preparation method thereof. The solid waste-based filling material comprises 40-60 parts of Bayer red mud, 40-60 parts of fly ash, 10-20 parts of desulfurization gypsum, 3-5 parts of a pumping agent, 30-60 parts of water, and the pumping agent is a compounded product of an organic silicon polycarboxylic acid water reducing agent, a polymaleic acid and a water-soluble cellulose at a mass ratio of 3-5:3-5:10. The organic silicon polycarboxylic acid water reducing agent is copolymerized from an unsaturated carboxylic acid monomer, a polyethylene glycol monoallyl ether and an unsaturated silane monomer at a mass ratio of 1.5-2:2-4:0.8-1 in the presence of a chain transfer agent. The silane monomer forms a hydrophobic region, and through the balance of the hydrophilic and hydrophobic region structure, the electrostatic repulsion between the solid waste gel particles with the water reducing agent adsorbed on the surface is enhanced, the occurrence of the solid waste gel particles wrapping the water reducing agent is prevented, and the slurry fluidity and the filling material strength are improved.

The invention discloses an anti-fracture building concrete material and a preparation method thereof, and relates to the technical field of building materials, the concrete material comprises the following raw materials by weight: 280-380 parts of cement; 500 to 600 parts of fine aggregate; 800 to 1000 parts of coarse aggregate; 1.5 to 3.5 parts of a degradable fiber inclusion; 20 to 40 parts of silica fume; 15 to 30 parts of rice hull ash; 10 to 20 parts of modified natural zeolite; 5-10 parts of an intelligent phase change material; 3-5 parts of a polycarboxylic acid water reducer; 5 to 10 parts of a calcium sulphoaluminate expanding agent; 150 to 200 parts of water; through the elaborately designed material formula, the anti-fracture performance and durability of the concrete are remarkably improved, the introduced degradable fiber inclusion is prepared by wrapping aramid fibers with a starch-based degradable material, and the structure enhances the interface bonding force between the fibers and a concrete matrix and also improves the durability of the concrete. The expansion of microcracks in the concrete is effectively inhibited through the high-strength characteristic of the aramid fibers, and the tensile strength and toughness of the concrete are improved.