148 results about "Cement particle" patented technology

The invention relates to the technical field of concrete, and particularly discloses super-retarded concrete for an ultra-large pile and a preparation method of the super-retarded concrete. The super-retarding concrete for the ultra-large pile is prepared from the following raw materials in parts by mass: 320 to 400 parts of a cementing material, 1820 to 1960 parts of aggregate, 20 to 28 parts of an inorganic-organic hybrid retarding reinforcing agent, 7.2 to 11.6 parts of a polycarboxylate superplasticizer and 85 to 98 parts of water, the inorganic-organic hybrid delayed coagulation enhancer is prepared by carrying out in-situ free radical polymerization reaction on a hydroxyl acrylate monomer, acrylamide and nano silicon dioxide. According to the inorganic-organic hybrid retarding reinforcing agent, a hybrid substance is formed through a chemical bond, an organic phase is chelated with calcium ions to realize retarding and does not excessively inhibit cement particles, inorganic phase nano silicon dioxide has no agglomeration risk, gaps are filled, a stable product is generated to resist alkali erosion, and the super retarding performance and the long-term strength of concrete are both considered; and the service life of the ultra-large pile is prolonged.

The present application relates to cement product particle grading technical field, specifically to a kind of cement product particle grading device, grading device includes feeding device, grading device, collection device and induced draft fan, feeding device and grading device pipeline intercommunication, induced draft fan import and grading device pipeline intercommunication, induced draft fan outlet and collection device intercommunication, feeding device is used to scatter cement, grading device is used to carry out internal circulation type grading to cement.The feeding device is used to transport cement product, and is sent into grading device for grading treatment, after treatment, through induced draft fan, it is sent into collection device, and fine powder cement particles are collected, coarse powder cement particles still remain in grading device, and flow out from the bottom discharge port, facilitate collection, and the grading device is used to carry out internal circulation to cement, to improve grading efficiency.

The present application relates to the technical field of gypsum board, in particular to water-resistant and moisture-proof paper-faced gypsum board and its preparation process, comprising two layers of modified facing paper and gypsum board core material between the two layers of modified facing paper, characterized in that the gypsum board core material is composed of modified core material slurry, and the raw materials of the modified core material slurry are composed of the following components: gypsum clinker, water, cement particle ball, premixed paste, alkali-free glass fiber, hydrophobic / hydrophilic mixed starch, hydroxypropyl methyl cellulose, coagulant, and silicon oil catalyst. The present application builds a micro-nano titanium dioxide / silane composite hydrophobic coating on the surface of the facing paper to form the first physical water-blocking layer, and introduces silane-modified nanocellulose and emulsified silicon oil into the core to establish a hydrophobic network inside the core material, and the two form a gradient protection structure of surface shielding and internal hydrophobicity. Even if the outer coating is partially worn, the core material can still effectively prevent water diffusion, significantly improving the water resistance reliability in long-term humid environment.

This utility model discloses a grouting device for bridge engineering construction, belonging to the field of bridge engineering technology. It includes: a base plate and a mixing tank; a mounting cover fitted onto the upper end of the mixing tank, the mounting cover being located on the upper end of the base plate and internally connected to a drive shaft, the bottom end of the drive shaft extending into the mixing tank. This utility model, through first contact blocks located on the outer sides of multiple support sleeves and multiple second contact blocks at the bottom of the mixing tank, allows the mixing tank to reciprocate axially up and down with the periodic thrust generated at the contact points of the first and second contact blocks when the drive shaft rotates. This enhances the longitudinal convection of the grout and also causes the mixing tank to rotate in the opposite direction to the drive shaft, forming a three-dimensional composite mixing effect. This significantly improves the dispersion efficiency and mixing uniformity of cement particles, effectively shortens the mixing cycle, and thus improves the efficiency of grouting operations, enhancing the applicability and practicality of the equipment under complex working conditions.

A roofing material is provided having an asphalt-coated mat or felt made up of or in combinations of fiberglass, polyester, nylon, cotton, cellulosic fibers or materials, polyethylene, polypropylene, co-polymers, melamine, phenolic, acrylics, polycarbonate, carbon fiber, clay, metallic in woven, non-woven, strands or sheets, styrene compounds, rubber, silk, leather, or wool in a woven, non-woven, or solid form. The surfacing materials can be made up of or in combination minerals, plastic particles or film, metal particles or film, cement particles, clay particles, paints, coatings, glass, ceramics, wood, wood fiber, or composite materials.

The invention relates to the technical field of polycarboxylate superplasticizer modification, in particular to a method for modifying a polycarboxylate superplasticizer through Ti-SiO2 porous microspheres, the modified polycarboxylate superplasticizer and application. The polycarboxylate superplasticizer is modified by adopting the nano Ti-SiO2 porous microspheres, and the modified polycarboxylate superplasticizer effectively reduces the liquid level tension of slurry, increases the spacing of cement particles and releases more free water, so that the viscosity reduction performance of cement slurry is improved, the mechanical property and durability of a hardened cement material are improved, and the strength of concrete is enhanced. The modified polycarboxylate superplasticizer prepared by adopting the method for modifying the polycarboxylate superplasticizer by adopting the nano Ti-SiO2 porous microspheres, provided by the invention, has relatively high water-reducing rate and relatively good workability and viscosity reduction performance, and the mechanical strength and durability are improved.

The invention discloses a preparation method of a slurry-extracting and gas-retaining concrete admixture, which is characterized in that dodecenyl succinic anhydride, ethanediamine or hexamethylenediamine and caprolactam are used as raw materials, and a carboxyl-terminated polyamide monomer (PAMA) with a long-chain olefin hydrophobic structure is synthesized through amidation and ring-opening reaction. And carrying out free radical copolymerization on the monomer, acrylic acid, a polyether macromonomer (HPEG / TPEG), hydroxyethyl acrylate, hydroxypropyl acrylate and the like in an aqueous solution to prepare a target additive. According to the invention, the self-synthesized PAMA monomer is introduced, and a long-chain hydrophobic structure in molecules of the PAMA monomer can be directionally adsorbed on the surfaces of cement particles to form a stable microscopic hydrophobic region and has a synergistic effect with the acrylate monomer, so that the gas-retaining property and the slurry extraction effect of the concrete are remarkably enhanced, and the problems of bleeding and segregation are effectively solved. The method is simple in process, the product is excellent in comprehensive performance, and the compounding process is simplified.

The utility model relates to the technical field of high-performance grouting material mixing, in particular to an offshore wind power high-performance grouting material mixing device which comprises a kettle body, a stirring and mixing structure and a screening structure, the stirring and mixing structure is rotatably mounted in the kettle body, and the screening structure for screening caked cement is fixedly mounted above the kettle body. A first feeding port and a second feeding port are formed in the upper portion of the kettle body, the screening structure comprises a first conveying belt, a second conveying belt and a vibrating screen, the second conveying belt is fixedly installed below the first conveying belt, the vibrating screen is fixedly installed below the end of the first conveying belt, and the vibrating screen is fixedly installed at the first feeding port; the end part of the second conveying belt is positioned above the second feeding hole; therefore, non-caked cement particles are ensured to enter the kettle body to be mixed, and caked cement is prevented from entering the kettle body to be mixed to influence the performance; the problem that caked cement is easily introduced into an existing high-performance grouting material during mixing to influence the product quality is solved.

The invention discloses an anti-cracking pouring fine aggregate concrete slab and a preparation method thereof, and belongs to the technical field of concrete production. The concrete slab comprises the following components: cement, stones, machine-made sand, a mineral admixture, a polycarboxylate superplasticizer, a maleic anhydride-hydroxypropyl acrylate copolymer and polyoxyethylene. Wherein the maleic anhydride-hydroxypropyl acrylate copolymer is prepared through free radical polymerization, a blocking layer is formed by combining cement particles and other components, the effects of dispersion, water retention and shrinkage reduction are achieved, stress is relieved through polyoxyethylene, pores are refined, the cracking problem of a fine aggregate concrete plate is effectively solved, and the crack resistance and strength of the prepared concrete are improved.

The invention relates to construction waste recycled aggregate concrete and a preparation method thereof, relates to the technical field of concrete, and improves the workability and durability of the concrete by reasonably proportioning a modified water reducing agent with other raw materials. Wherein the modified water reducing agent is prepared by carrying out primary esterification on maleated rosin and a monomer containing hydroxyl, then carrying out dicarboxylation on the modified water reducing agent and sulfonating the modified water reducing agent through sulfite, has a hydrophobic skeleton and carboxyl and sulfonic acid double hydrophilic groups, and can strongly adsorb cement particles, form a static electricity and steric hindrance double effect, disperse a cement binding material and release water; and workability loss and shrinkage cracking caused by high water absorption of the recycled aggregate are inhibited. The concrete prepared by the invention has the advantages of good water reducing property, good strength and difficulty in collapsing.

The invention relates to the technical field of concrete admixtures, and particularly discloses a rapid dispersing type polycarboxylate superplasticizer and a preparation method thereof.The rapid dispersing type polycarboxylate superplasticizer is prepared from, by mass, 200-300 parts of polyether monomer, 1.5-3.5 parts of oxidizing agent, 0.2-0.5 part of reducing agent, 1.2-3 parts of chain transfer agent, 25-33 parts of unsaturated acid, 10-20 parts of self-made functional monomer modified alkyl glycoside, 5-10 parts of aconitic acid and 250-300 parts of tap water. The preparation method comprises the following steps: dissolving, preparing a solution A, preparing a solution B and synthesizing to prepare the quick dispersing type polycarboxylic acid water reducing agent. By introducing alkyl glycoside, wetting of cement particles is promoted, water-cement interfacial tension is rapidly reduced, meanwhile, cement particle aggregation is hindered through stereoisomerization of alkyl glycoside, the effect of rapid dispersion of cement particles is achieved, and modified alkyl glycoside provides adsorption points and electrostatic repulsion of cement particles to hinder cement particle aggregation, so that the cement particles are dispersed rapidly. The cement particles can be quickly dispersed in a low-temperature environment.

The invention relates to a preparation method and system of a functional cement-based material, relates to the technical field of civil construction materials, and solves the problem that the stability, economical efficiency and multifunctional cooperation of the material are difficult to consider due to lack of function-structure-process system regulation and control in the two methods at present. The method comprises the following steps: adding cement particles with a preset initial particle size after acquiring a starting signal of a granulator, starting the granulator to rotate, spraying water according to a preset water-cement ratio, monitoring the particle size and the water content of the particles in real time, and dynamically adjusting the rotating speed to reach the standard; after granulation is completed, a nozzle is switched to spray a functional material, the thickness and uniformity of a coating are monitored, and parameters are optimized to reach the standard; then cold pressing and quality evaluation are carried out, curing is carried out after the standard is reached, and finally the functional concrete is obtained. The cement-based material has the advantages that a continuous functional network is efficiently formed, various functions are given to the cement-based material, and manufacturability and performance are both considered.

The application discloses a water-soluble polyurea early strength agent, a preparation method and application thereof. The method comprises the following steps: reacting diaminopolyether, diisocyanate and a catalyst to obtain a polyurea prepolymer; adding a chain extender into the polyurea prepolymer and continuously reacting to obtain polyurea; and finally, dropping the polyurea into water, continuously stirring in the dropping process, and obtaining a transparent water-soluble polyurea early strength agent. The water-soluble polyurea early strength agent is applied to cement paste, mortar and concrete mixing. The polyurea has abundant carboxyl sites, can be adsorbed on the surface of cement particles, prevents cement from condensing, improves the cohesiveness and water retention of the paste, and has better workability, can be uniformly dispersed and fully reacted in the concrete, so that the cement hydration is accelerated, and the early strength of the cement, mortar and concrete is improved.

The invention relates to the technical field of water reducing agents, and particularly provides a composite polycarboxylic acid water reducing agent and a preparation process thereof. The water reducing agent is prepared from the following raw materials: 300 to 400 g of allyl polyoxyethylene ether, 80 to 120 g of acrylic acid, 30 to 40 g of 2-acrylamide-2-sodium methylpropanesulfonate, 10 to 20 g of ethyl phosphate methacrylate, 20 to 40 g of N-vinyl caprolactam, 5 to 10 g of disulfide bond-ureido composite cross-linking agent and 15 to 25 g of sulfydryl modified nano silicon dioxide. The invention relates to a water-based paint which is prepared from the following raw materials by weight: 10-20 g of an N-vinyl-2-pyrrolidone-acrylamide copolymer, 5-10 g of octadecyl polyoxyethylene ether, 5-8 g of an initiator, 2-4 g of a chain transfer agent and 600-800 g of deionized water. The composite polycarboxylic acid water reducing agent provided by the invention realizes pH-temperature dual response through cooperation of multiple components, accelerates release of water reducing components at high temperature to compensate slump loss, and prolongs slump retaining time at low temperature; the early strength of concrete can be improved, and low-temperature stability is enhanced; cement particle dispersion can be enhanced, dual protection is formed, the problem of cement compatibility is effectively solved, and mud resistance is improved.

The utility model relates to the technical field of cement production, and discloses a leakage-proof conveying device for cement production, which comprises an outer frame, a conveying belt is arranged on the inner wall of the outer frame, a fixed bottom plate is fixedly connected in the outer frame, and a second rotating plate is rotatably connected in the fixed bottom plate. And linkage plates are rotationally connected to the two ends of the second rotating plate correspondingly, a sliding plate is rotationally connected to one end of each linkage plate, an electric push rod is fixedly connected to the interior of the fixed bottom plate, the output end of the electric push rod is fixedly connected with the sliding plate, and a guide rail is arranged at the bottom of the sliding plate. According to the utility model, the problems that cement is easy to overflow from gaps and resources are wasted due to the fact that real-time adjustment is difficult to carry out according to the change of cement conveying capacity or the running condition of the conveying belt are solved, and the purposes of ensuring that the baffle and the conveying belt are kept at a proper distance, preventing cement particles or dust from leaking from the gaps and improving the conveying efficiency are achieved. And the resource waste is greatly reduced.

This invention discloses a building energy-saving insulation material and its preparation process, belonging to the field of thermal insulation building materials. It comprises the following components by weight: 100 parts modified cement particles, 5-8 parts reinforcing agent, 35-40 parts fly ash, 1-2 parts foaming agent, 0.4-0.5 parts foam stabilizer, water, and other additives; wherein the water-cement ratio of the water to the modified cement particles is 0.8-1; the reinforcing agent includes a modified attapulgite-grafted long-cut fiber composite material and nanofibers in a mass ratio of (1.5-3):1; the modified cement particles are isocyanate-modified cement particles. This application solves the problem that when long-cut fiber reinforced foamed cement exhibits its own shape and curling, the fiber reinforcement results in significant agglomeration, causing a decrease in the compressive strength and crack resistance of the cement layer instead of an increase.

The invention discloses a mullite whisker modified toughening agent, a preparation method thereof and well cementation cement slurry containing the mullite whisker modified toughening agent, and belongs to the technical field of oil-gas field development well cementation materials, the mullite whisker modified toughening agent comprises the following components by weight: 10-20 parts of mullite whisker, 0.05-0.4 part of a surfactant, and 3-18 parts of nano silica. The mullite whisker modified toughening agent provided by the invention has a good application effect in well cementation cement slurry, the particle size of the toughening agent is close to that of oil well cement particles, and when set cement forms micro cracks, the advantages of smaller size, special three-dimensional needle-shaped structure and the like of the toughening agent can be utilized to improve the toughness of the cement slurry. The mechanical property of the set cement is improved through the strengthening effects of crack bridging, deflection, whisker pulling-out and the like.

The utility model relates to a separator for cement product processing, which belongs to the technical field of cement product processing equipment, and comprises a bottom plate, a slurry tank arranged above one end of the bottom plate, three support legs arranged at the bottom of the slurry tank, a cement separation chamber arranged above the other end of the bottom plate, and a cement separation chamber arranged above the other end of the bottom plate, two fixing plates are arranged at the bottom of the cement separation chamber, the cement separation chamber is fixed to the bottom plate through the fixing plates, the slurry tank is connected with the cement separation chamber through a pipeline, a waste pipeline is arranged on the side face of the slurry tank, a first driving motor is arranged at the bottom of the middle of the slurry tank, bearing seats are arranged at the two ends of the cement separation chamber, and a differential mechanism is arranged at the tail end of the cement separation chamber. Cement particles and water can be efficiently separated, pure cement is obtained, the equipment is reasonable in design and easy and convenient to operate, the labor intensity of workers is reduced, and the equipment is compact in structure, easy to maintain and resistant to corrosion and abrasion.

The present application belongs to the technical field of concrete admixtures, and particularly discloses a composite hydration temperature rise inhibitor and a preparation method thereof. The present application provides a composite slow-release material with a novel structure to coat retarding acid with hydration temperature rise inhibition and hydrolysis products such as small-molecule sugar produced by hydrolysis of chitosan. When applied to concrete, the composite slow-release material can slowly swell during the cement hydration process, slowly release the retarding acid and small-molecule sugar coated therein, and inhibit the number of nucleation in the early stage of cement hydration by adsorbing cement particles or chelating calcium ions in the cement. The composite slow-release material itself has an adsorption effect and can adsorb early nucleation particles. The number of early nucleation particles is effectively reduced, the cement hydration rate is slowed down, and the purpose of hydration regulation is achieved. Moreover, the slow release of the retarding acid does not cause the problem of excessively prolonged setting time. The composite hydration temperature rise inhibitor has good application in inhibiting temperature cracks of concrete.

The invention discloses a soft soil curing material with synergistic effect of waste concrete recycled micro powder and lime and a preparation method of the soft soil curing material, and belongs to the technical field of soft soil curing. The soft soil curing agent provided by the invention comprises calcium hydroxide and waste concrete recycled micro powder in a mass ratio of 3: 7, wherein the particle size of the waste concrete recycled micro powder is less than 0.16 mm. According to the invention, unhydrated cement particles and active SiO2, Al2O3 and other components contained in the waste concrete recycled micro powder are utilized, and a pozzolanic reaction is carried out under the alkaline excitation action of calcium hydroxide, so that a hydrate (such as C-S-H gel) with gelling property is generated in the solidified soft soil. Gelling substances generated in the curing process of the calcium hydroxide and the waste concrete recycled micro powder can effectively bond soil particles in the soft soil to fill pores and consume free water in the soft soil at the same time, so that the mechanical property of the cured soil is greatly improved.

The utility model belongs to water reducing agent production technical field, concretely speaking is a kind of water reducing agent production adding device, including base, one group of support leg is fixedly connected on the base outer circle wall, the mixing bucket is fixedly connected with the base top, the detachable casing is equipped in the mixing bucket top, the connecting plate is fixedly connected with the casing top, the sealing plate is slidably connected with both sides of the connecting plate, the material groove is fixedly connected with the sealing plate top, the material groove is communicated with the sealing plate, the blanking head is seted up in the material groove inside, the baffle is slidably connected in the blanking head inside, to make up the deficiency of prior art, to solve water reducing agent in production process, possibly because adding device cannot realize ration feeding, lead to water reducing agent performance unstable, active ingredient concentration fluctuation leads to water reducing rate difference, appears local caking or delamination phenomenon, caking area can lead to cement particle dispersion uneven, hydration product distribution appears obvious gradient problem.

The application provides a cement cost determination method and device, electronic equipment and medium, and relates to the field of cement.The method comprises the following steps: obtaining target proportions of component cement ingredients according to each proportion constraint interval of the component cement ingredients and a preset proportion target; and determining the cement cost according to the target proportions of all component cement ingredients and the unit price of each component cement ingredient, in the case that a target particle size distribution of the target proportions meets a preset particle size distribution constraint interval, a target cement fineness of the target proportions meets a preset cement fineness constraint interval, and a target cement strength of the target proportions meets a preset cement strength constraint interval.The application seeks an optimal cement grinding ingredient scheme by taking the following conditions as constraints: suitable cement particle size distribution composition, lowest cement comprehensive cost, and lowest cement quality meeting standard requirements, so as to reduce the cement cost while ensuring that the constraints are met.

The invention relates to the technical field of grouting material preparation, and discloses a high-strength micro-expansive cement-based well wall grouting material and application thereof.The grouting material is prepared from, by weight, 55%-75% of cement, 10%-25% of silica fume, 2%-5% of a water reducing agent, 0.02%-0.1% of an expanding agent, 0.01%-0.05% of a suspension stabilizer and the balance water. And 10%-20% of water. The cement is P.O.42.5 ordinary Portland cement and comprises the following chemical components in percentage by weight: 20%-25% of SiO2, 4%-7% of Al2O3, 2%-5% of Fe2O3, 60%-65% of CaO, 1.5%-3.5% of SO3, 1%-3% of MgO, less than or equal to 1.0% of alkali, less than or equal to 1.5% of insoluble substances and less than or equal to 5.0% of ignition loss. By reasonably proportioning a plurality of high-quality components, the advantages of all the materials are fully exerted. The cement is used as a main gelling foundation and has a synergistic effect with the silica fume, and the micro-aggregate effect and the active effect of the silica fume can effectively fill pores among cement particles, so that the slurry structure is more compact. Due to the addition of the water reducing agent, the flowability of the slurry is greatly improved, and the water consumption can be reduced on the premise of ensuring the flowability, so that the strength of the grouting material is improved.

The invention discloses a fine cement grouting material for seepage control of fine cracks of rock mass. The fine cement grouting material comprises the following components in parts by weight: 100 parts of cement; 50 to 60 parts of water; 0.5 to 1.0 part of a water reducing agent JG; and 1-2 parts of a coagulant CK. The invention also discloses a preparation method of the composition. The grouting material has the main beneficial effects that the fineness of cement particles in the grouting material is reduced, the stability of slurry is enhanced, and the slurry can be effectively injected into fine cracks of rock mass; the viscosity of the slurry is reduced, and the fluidity of the grouting slurry is improved; the hydration reaction and the hydration speed are improved, the condensation of cement grout is promoted, the grouting time is shortened, and the working efficiency is improved; mechanical properties such as compressive strength and impermeability strength of a condensate after slurry solidification are improved; the grouting material can be prepared under the condition of normal temperature, the required energy consumption is low, and all the components are inorganic materials, so that the grouting material is pollution-free and excellent in environment-friendly performance; the hardened stone is high in strength, good in durability and wide in adaptability.

The invention provides a composite functional cement additive and a preparation method thereof, and belongs to the technical field of cement. The additive comprises the following components: polycarboxylic acid modified condensation, triisopropanolamine, triethanolamine and sodium gluconate. The polycarboxylic acid modified condensation compound is formed by copolymerizing methyl allyl polyoxyethylene ether, acrylic acid and 2-hydroxyethyl methacrylate phosphate which are used as comonomers. Through molecular design and component compounding, multiple synergistic effects are generated. And the unique structure can effectively delay the aggregation of cement particles and greatly improve the workability of the slurry. All functional components are integrally designed, so that the compatibility problem is avoided, and the performance stability is ensured. Meanwhile, by refining pores and optimizing a microstructure, the anti-permeability and durability of the concrete are remarkably enhanced, and the comprehensive performance is remarkably improved.

This utility model discloses a compressive strength testing device for cement-modified mudstone. The device includes a base, a test plate on the upper surface of the base, a pressure sensor fixed at the connection between the lower surface of the test plate and the upper surface of the base, and top frames fixedly installed at both ends of the upper surface of the base. Two cylinders are fixedly installed at the top of the top frames, and pressure plates are fixedly installed inside the top frames at the ends of the two cylinders. By designing a cleaning and scraping mechanism, when cement particles remain on the surfaces of the pressure plates and test plates after testing, the moving frame and scraper can be stably moved so that the scrapers on both sides contact the surfaces of the test plates and pressure plates respectively to scrape and clean them. This facilitates cleaning, and allows for accurate testing of mudstone placed stably on the surface of the test plate during subsequent tests. This improves the convenience and accuracy of cleaning the main body of the compressive strength testing device during cement-modified mudstone compressive strength testing.

The photocuring 3D printing cement-based composite material is prepared by the following steps: adding a stabilizer into deionized water, and stirring until the stabilizer is completely dissolved to obtain a stabilizer solution; adding an organic monomer, a cross-linking agent and a dispersing agent into the stabilizer solution, stirring until the materials are completely dissolved, then adding a photoinitiator, and performing ultrasonic dispersion to obtain an organic mixed solution; placing the mixed solution in a vacuum drying oven, and removing oxygen at room temperature; adding cement and a water reducing agent into the deoxygenated mixed solution, and uniformly stirring to obtain a precursor solution; the precursor solution is poured into a digital light treatment 3D printer material pool, the sliced three-dimensional model is printed, organic components in the precursor solution are subjected to a photopolymerization reaction, and a polymer template wrapped with cement particles is formed through 3D printing; and coating a film, and carrying out standard curing for 28 days, so that the cement particles are subjected to hydration reaction continuously, and finally, the set and hardened light-cured 3D printing cement-based composite material is obtained. And high-precision forming of a complex structure is achieved.

The invention relates to a polyhydroxy esterified monomer, a preparation method of the polyhydroxy esterified monomer, an anti-freezing ether rapid dispersion material and a preparation method of the anti-freezing ether rapid dispersion material. The polyhydroxy esterified monomer is prepared from the following raw materials: a first unsaturated acid monomer, 1-deoxy-1-(2-hydroxyethylamino)-D-sorbitol, a catalyst and a polymerization inhibitor; according to the invention, 1-deoxy-1-(2-hydroxyethylamino)-D-sorbitol and a first unsaturated acid monomer are subjected to an esterification reaction to prepare a polyhydroxy esterified monomer, and the polyhydroxy esterified monomer participates in a copolymerization reaction, so that a molecular structure contains a plurality of hydroxyls and can adsorb water molecules and reduce the vapor pressure of an aqueous solution, thereby reducing the freezing point of water to a certain extent, and further reducing the temperature of the water to a certain extent. Crystal generation is inhibited, and an anti-freezing effect is achieved; a polyhydroxy structure has a relatively large steric hindrance effect and provides enough adsorption sites, so that a flocculation structure of cement particles can be instantly destroyed, and the adsorption quantity of the cement particles is improved, thereby improving the dispersion performance; the method is simple in process operation, mild in reaction condition and easy for large-scale production.

The invention relates to an early-strength viscosity-reducing water reducer for LC3 cement and a preparation method and application thereof, and the preparation method comprises the following steps: mixing anion ring-opened cucurbituril containing double bonds, a first solid monomer and deionized water, heating and stirring until complete dissolution to obtain a mixed solution; adding an initiator into the mixed solution, dropwise adding a second monomer aqueous solution and a chain transfer agent aqueous solution at the same time within 3 hours, after dropwise adding is finished, carrying out heat preservation reaction for 0.5-1.5 hours, and terminating the reaction to obtain the early-strength viscosity-reducing water reducer for the LC3 cement. According to the invention, ring-opened cucurbituril containing an anionic solubilizing group is introduced, so that the water solubility is good, a hydrophobic structure is provided, the thickness of a water film layer of LC3 cement particles in slurry can be effectively reduced, more bound water is released for slurry flowing, the water consumption is effectively reduced, and the workability of cement is improved; the early-strength viscosity-reducing water reducer is high in strength and large in size, ineffective adsorption of the early-strength viscosity-reducing water reducer in LC3 cement is avoided, the dosage is reduced, growth of CH crystals is promoted, and the early strength of the cement is obviously improved.

The application provides a cement grinding aid, a preparation method and application thereof, and belongs to the technical field of cement. NH2-UiO-66 is prepared, MA-NH2-UiO-66 is prepared by reacting with maleic anhydride, monomer 1 prepared from maleic anhydride and diethanolamine, monomer 2 prepared from maleic anhydride and diol, and silane coupling agent and allyl polyoxyethylene ether are polymerized to prepare the cement grinding aid. The cement grinding aid prepared by the application not only can improve the cement particle distribution, stimulate the hydration dynamics, improve the early strength and late strength of cement and the like, but also is beneficial to improving the grinding process in the cement production process, and has important roles in reducing energy consumption and improving energy use efficiency, and has wide application prospects.