223 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 invention discloses a super-retarding type polycarboxylic acid water reducing agent and a preparation method and application thereof, and belongs to the field of concrete water reducing agents. The preparation method comprises the following steps: taking acrylic acid AA, isobutenol polyoxyethylene ether HPEG and hydroxyethyl acrylate HEA as monomers, taking mercaptopropionic acid MPA as a chain transfer agent, taking hydrogen peroxide H2O2 and L-ascorbic acid Vc, and mixing in proportion to serve as an initiator; preparing a first and second monomer mixed solution; adding bottom water into the reaction kettle, and carrying out stepwise polymerization reaction; and cooling the reaction liquid, adjusting the pH value, filtering, and discharging to obtain the product. According to the invention, an ester functional monomer hydroxyethyl acrylate HEA is introduced, and a step-by-step polymerization technology is adopted to control the dispersion process of water reducing agent molecules on cement particles, so that the water reducing agent molecules continuously disperse the cement particles within a certain period of time; the problem that the slump loss is too fast due to long-time and long-distance transportation of concrete or transportation in high-temperature weather is effectively relieved.

The invention relates to the technical field of concrete admixtures in building materials, in particular to a viscosity reduction type polycarboxylic acid water reducer suitable for high-strength concrete and a preparation method of the viscosity reduction type polycarboxylic acid water reducer. The hydrophobic modified unsaturated double-chain polyether macromonomer is prepared from the following components in parts by mass: 20 to 30 parts of unsaturated acid, 200 to 300 parts of hydrophobic modified unsaturated double-chain polyether macromonomer, 10 to 15 parts of phosphate monomer, 2 to 4 parts of oxidizing agent, 1 to 2 parts of reducing agent, 1 to 2 parts of chain transfer agent, 5 to 10 parts of neutralizing agent and 120 to 180 parts of water. According to the invention, the polyether chain can unfold in a pore solution, the steric hindrance effect is further enhanced, cement particles are ensured to be effectively dispersed in a compact space, and meanwhile, the hydrophobic part of the side chain can effectively reduce the surface tension of the pore solution, so that the condition of overhigh viscosity is avoided, and the flowability and constructability of the concrete are improved.

The invention discloses low-hydration-heat iron aluminate cement and a preparation method thereof, and belongs to the technical field of maritime work cement, and the low-hydration-heat iron aluminate cement comprises 70-85 parts of iron aluminate cement clinker, 5-7 parts of a bio-based retarder, 4-8 parts of a nano friction regulator, 3-4.5 parts of a microcapsule dual repair agent, 5-10 parts of gypsum and 15-25 parts of a mixed material. The fucoidan polysaccharide sulfate and calcium ions in a cement hydration product form a complex through sulfate groups in molecules of the fucoidan polysaccharide sulfate, and further hydration of cement particles is prevented, so that the early heat release rate is effectively reduced, temperature cracks are prevented from being generated in a concrete structure, and the stability and durability of the structure are improved. According to the microcapsule dual-repairing agent, the problem of delayed volume expansion of the steel slag powder caused by fluctuation of the content of free calcium oxide is effectively solved through the matching effect of the inner-layer repairing agent and the outer-layer carrier. According to the gradient clinker sintering process, mineral distribution and chemical reaction paths in clinker are optimized, so that the generation amount of cement hydration heat is remarkably reduced, and meanwhile, the thermal stability of slurry is improved.

The invention relates to the technical field of intelligent grouting, in particular to an intelligent grouting method based on real-time permeability monitoring, which comprises the following steps: arranging a pressure monitoring array in a to-be-grouted area, and electrically connecting the pressure monitoring array with a controller; grouting is started, and the time when the grout reaches all the measuring points is obtained; the stratum permeability change condition is calculated; and dynamically adjusting grouting parameters according to the permeability change condition, wherein the grouting parameters comprise grouting pressure, a water-cement ratio and a cement particle size. According to the method, the grouting target is achieved most efficiently, most economically and most safely through the most appropriate grout, and the problems that in a traditional grouting technology, grouting is not uniform, the reinforcing effect is poor, and potential safety hazards are large are solved. And the grouting parameters are dynamically adjusted based on the change of the permeability, it is ensured that proper grout is injected, the construction quality and efficiency are improved, and intelligent development of the grouting technology is further promoted.

The present invention relates to the technical field of concrete admixtures, and particularly relates to a rapid-dispersing polycarboxylate water reducer and a preparation method thereof. The water reducer is copolymerized from an acetyl-capped polyether macromonomer, acrylic acid, an ester macromonomer and functional monomer C through a copolymerization reaction. The rapid-dispersing polycarboxylate water reducer prepared by using a specific acetyl-capped polyether macromonomer in the present invention has a significantly improved adsorption rate and early adsorption amount on the surface of cement particles, and the later adsorption amount of the water reducer can be maintained at a relatively high level. The net paste dispersion time of the cement using this water reducer is short, and less of this water reducer is required to meet the same initial net paste fluidity requirement. This water reducer has a fast dispersion speed, good dispersion performance and good slump retention performance at low temperatures.

The invention discloses a frost-crack-resistant salinized soil curing agent based on a nano material and a preparation method thereof, and relates to the technical field of soil curing agents. The preparation method of the curing agent comprises the following steps: uniformly stirring and mixing the cement and the basalt fiber to obtain a premix; adding silica fume, nano silicon dioxide and polyacrylamide into the premix, and continuously stirring and uniformly mixing to obtain the frost crack resistant saline soil curing agent based on the nano material. The silica fume and the nano silicon dioxide are used, so that gaps among cement particles can be effectively filled, the porosity is reduced, and the compactness of the solidified soil is improved; after the nano silicon dioxide is hydrophobically modified by the polydimethylsiloxane, a hydrophobic network is formed in the material, and water permeation is further hindered. And meanwhile, due to the reinforcement function of the basalt fibers and the spatial reticular reinforcement structure constructed by polyacrylamide, the cracking resistance of the soil body is enhanced.

The invention provides a high-temperature-resistant oil well cement retarder and a preparation method thereof, and relates to the technical field of cement retarder materials. The high-temperature-resistant oil well cement retarder is prepared from the following materials in parts by weight: 30 to 40 parts of sulfo-siloxane grafted lignosulfonate, 5 to 10 parts of self-repairing microcapsules, 5 to 8 parts of zinc oxide, 2 to 3 parts of hexagonal boron nitride nanosheets, 1 to 2 parts of pH buffering agent, 2 to 4 parts of polycarboxylic acid water reducing agent and 8 to 12 parts of deionized water. According to the high-temperature-resistant oil well cement retarder disclosed by the invention, the temperature resistance of the high-temperature-resistant oil well cement retarder is improved; the phenomena of bulging, core wrapping and the like in a high-temperature experiment are avoided; the dispersion uniformity of the high-temperature-resistant oil well cement retarder on cement particles is improved, and local premature solidification or excessive retarding in cement paste is prevented; the problem that the strength is reduced due to the fact that retarder components are adsorbed on the surfaces of cement particles to hinder formation and growth of hydration products is solved.

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.

An organic phosphonate retarder, its preparation method and application relate to the technical field of concrete admixtures. The specific preparation method is as follows: Add a hydroxylamine monomer, water, phosphorous acid, and a catalyst into a reaction vessel, dropwise add formaldehyde for reaction, cool the reaction to room temperature, and add liquid alkali to neutralize to a pH of 5 to obtain the organic phosphonate retarder. The hydroxylamine monomer is an organic compound containing both an amino group and a hydroxyl group in its molecular structure. The molar ratio of the active hydrogen in the amino group of the hydroxylamine monomer to phosphorous acid is 1:0.5 - 1, the molar ratio of phosphorous acid to formaldehyde is 1:1 - 1.2, the catalyst accounts for 3 - 10% of the total mass, and the mass of water accounts for 30 - 50% of the total mass. The organic phosphonate retarder prepared by the present invention has both phosphonic acid groups and hydroxyl groups, can simultaneously complex calcium ions in the cement solution to delay the formation of hydration products, and can form a solvation film on the cement particles to hinder the hydration of cement, with a stronger retardation effect.

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 present invention discloses a high-performance water reducer of organosilicon condensate type and a preparation method thereof. Liquid ammonia and ethylene oxide undergo a ring-opening reaction to obtain an N-hydroxyethylamine compound. The N-hydroxyethylamine compound is condensed with formaldehyde to obtain an N-hydroxyethyl-N-hydroxymethylamine intermediate. The N-hydroxyethyl-N-hydroxymethylamine intermediate undergoes an esterification reaction with phosphorus trichloride to obtain an amino alcohol intermediate containing a phosphate ester group. The amino alcohol intermediate containing a phosphate ester group is polymerized with a dihydrogen-terminated polydimethylsiloxane oligomer to obtain an organosilane-modified oligomer containing amino and phosphate ester groups, and then a high-performance water reducer is obtained through high-temperature dehydration. The phosphate ester group, siloxane group, and amino group connected to the high-performance water reducer of the present invention reduce the liquid-solid interfacial energy and improve the dispersing ability, dispersion stability, and anti-sludge ability of the high-performance water reducer to cement particles. The water reducer of the present invention has a protective effect on the steel bars in reinforced concrete, the preparation process is simple, the product has good uniformity, realizes low cost, green environmental protection, and multifunctionalization, and has good application prospects.

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 present invention discloses a device for collision and gel breaking and separation of marine hydrate cemented particles, comprising a lower outer tube, an inner tube assembly located inside the lower outer tube, the inner tube assembly comprising a lower inner tube; a gel breaking sleeve is arranged inside the lower inner tube, the bottom of the gel breaking sleeve is closed, a plurality of radially opposite jet holes are provided on the side wall of the gel breaking sleeve, and an annulus is provided between the gel breaking sleeve and the lower inner tube; the device also comprises a driving mechanism that slides and fits inside the gel breaking sleeve to push a shaft and drives the shaft to perform axial reciprocating motion. The present invention provides a device for collision and gel breaking and separation of marine hydrate cemented particles to solve the problems of relatively small gel breaking force and insufficient gel breaking and separation effect on cemented particles in the prior art, thereby achieving the purpose of improving the gel breaking efficiency of cemented particles and thus improving hydrate recovery efficiency.

The invention belongs to the technical field of cement production and processing, and particularly relates to a grinding aid for cement processing and a preparation process thereof. Vinyltrimethoxysilane, 2-hydroxyethyl acrylate, N-isopropylacrylamide, acrylic acid and methylallyl polyoxyethylene ether are subjected to free radical polymerization reaction under the action of a redox initiator to prepare the grinding aid for cement processing, and through the synergistic effect of polyfunctional groups, the grinding aid can be used for cement processing. The adsorption capacity of the grinding aid and cement particles is improved, so that the dispersity of cement is improved, and good grinding aid efficiency is realized; modified nano aluminum oxide is added into the grinding aid for cement processing, the nano-scale particle size of the modified nano aluminum oxide is used as micro balls, gaps of cement particles are filled with the micro balls, collision and friction among the particles are reduced, the grinding resistance is reduced, the grinding efficiency is improved, and in the subsequent hydration process of cement, the modified nano aluminum oxide is used as a potential crystal nucleus to promote generation and growth of C-S-H gel; the strength of a cement product 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 application discloses an anti-frost-cracking saline soil solidifying agent based on nanomaterials and a preparation method thereof, and relates to the technical field of soil solidifying agents. The preparation method comprises the following steps: uniformly stirring and mixing cement and basalt fibers to obtain premix; adding silica fume, nanosilica and polyacrylamide into the premix, and continuously stirring and mixing to obtain the anti-frost-cracking saline soil solidifying agent based on nanomaterials. The silica fume and nanosilica can effectively fill the gaps between cement particles, reduce porosity and improve the compactness of the solidified soil. After the nanosilica is hydrophobically modified by polydimethylsiloxane, a hydrophobic network is formed in the material, further hindering water penetration. Meanwhile, the tendon solidification of the basalt fibers and the space netting reinforced structure constructed by the polyacrylamide enhance the anti-cracking performance of the soil.

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.