1230 results about "Sodium silicate" patented technology

The invention relates to a high-strength stable solid waste-based composite cementing material and a preparation method and application thereof in the field of building materials. The high-strength stable solid waste-based composite cementing material is prepared from the following raw materials in parts by weight: 70-85 parts of composite solid waste micro powder; 10 to 20 parts of Portland cement clinker; 3-8 parts of a composite activator; 0.5 to 2 parts of a nano-scale function regulator; wherein the composite solid waste micro powder is prepared by mixing and grinding the following raw materials in parts by weight: 40-60 parts of blast furnace slag powder; 20 to 30 parts of fly ash; 10-20 parts of chemically modified electrolytic manganese residue powder; and 5-15 parts of steel slag powder. According to the preparation method, sodium metasilicate is adopted to assist medium-temperature calcination to chemically modify the electrolytic manganese residues, so that not only is the gelation activity of the electrolytic manganese residues effectively excited, but also free-state manganese, cadmium and other heavy metal ions in the electrolytic manganese residues are fixed in situ in newly formed zeolite-like silicate mineral lattices through thermochemical reconstruction; and a brand new technical path is opened up for safe and high-value utilization of the typical hazardous waste, namely the electrolytic manganese residues.

The present invention relates to a sealing method for high-flow water inrush at a side wall of a foundation pit, the method comprising: calculating the minimum radius of a counter-pressure soil berm on the basis of the flow time of a liquid slurry in the counter-pressure soil berm being not less than the chemical setting time of the liquid slurry; piling up filtering sand bags on a foundation pit excavation face at a water inrush point, and constructing the counter-pressure soil berm; constructing annular grouting holes at the foundation pit on the outside of support piles and a cut-off curtain; according to the planar arrangement of the annular grouting holes, successively injecting a double-liquid slurry formed by mixing a cement slurry and sodium silicate into the annular grouting holes; inspecting the water seepage condition on the periphery of the counter-pressure soil berm until no water seepage occurs on the periphery of the counter-pressure soil berm; and excavating the counter-pressure soil berm layer by layer until the excavation reaches the pit bottom without water seepage observed at a side wall of the foundation pit. The present invention has the beneficial effects that: the size of the counter-pressure soil berm is optimally designed on the basis of the condition that the flow time of the double-liquid slurry in the soil berm is longer than the setting time, so as to solve the problems of slurry setting failure and poor grouting and sealing effects, thus saving a large amount of grouting materials, and reducing economic loss caused by secondary sealing.

The invention relates to the technical field of flux-cored wires. The preparation method comprises the following steps: weighing the following raw materials in parts by weight: 4-6 parts of chromium carbide powder, 7-9 parts of molybdenum powder, 6-8 parts of nickel powder, 10-15 parts of niobium powder, 15-18 parts of tungsten carbide powder, 7-11 parts of a modified titanium carbide agent, 5-8 parts of a blending agent added based on boron and 2-4 parts of 30-mesh natural graphite; 1-2 parts of sodium fluosilicate; 1-2 parts of aluminum powder; and 70-75 parts of iron powder. The flux-cored wire can adapt to complex service environments of parts such as rollers and continuous casting crystallizers in the metallurgical industry, the service life of the parts subjected to surfacing repair is prolonged, the production efficiency of the parts subjected to surfacing repair is improved, the obtained flux-cored wire achieves balance of high-temperature performance, mechanical performance and low-temperature stability, and the comprehensive applicability of products is improved.

The invention belongs to the field of material protection, and particularly relates to a method for improving spraying efficiency and adhesive force by adding a binder in the plasma spraying process. The binder comprises one or more of bentonite, silicon dioxide, borax, sodium silicate and aluminum phosphate. The device has the function of quickly melting spraying particles at high temperature and adhering the spraying particles to a spraying substrate, so that the powder spraying efficiency is improved, and the production efficiency is improved. The method comprises the following steps: firstly, carrying out sand blasting treatment on a spraying base material, removing dust and impurities on the surface to enable the roughness to reach 8-10 microns, weighing, and measuring the surface area to be sprayed; and then weighing the binder and putting the binder into a drying oven to be dried at 120 DEG C; the method comprises the following steps: uniformly mixing a binder and an analytically pure nano spraying material according to a certain proportion, and pouring into a plasma spraying raw material tank; and spraying is carried out at the position with the voltage of 30-50 V, the current of 300-600 A, the air pressure of 8 Mpa and the distance of 80-120 mm. The spraying time is 3-5 min, and after spraying is completed, the powder spraying amount is calculated by weighing the mass difference of the base material before and after the base material is weighed. And by adding the binder, the powdering rate is increased from 30.79% to 51.24%, the consumption of spraying materials is greatly reduced, and the working efficiency is improved.

The invention discloses stable silicon dioxide microspheres as well as a preparation method and application thereof. Mixing a sodium silicate diluent and an organic acid aqueous solution to form colloidal particles, and carrying out a sol-gel reaction to obtain silica sol; the preparation method comprises the following steps: in an air environment, throwing silica sol into water under stirring to form microspheres, injecting inorganic acid into the water at the same time, then injecting a sodium silicate diluent for reaction, and then adjusting the pH value of the system to 6-7; and aging, washing, drying and roasting to obtain the silicon dioxide microspheres. The preparation method comprises the following steps: mixing a sodium silicate diluent and an organic acid aqueous solution by an acid mixing method, granulating by air to form microspheres, and finally injecting inorganic acid to quickly remove heat, reduce pressure drop and maintain the state of the microspheres, thereby obtaining the stable silicon dioxide microspheres. The porous silicon dioxide microsphere with larger surface area and pore volume is obtained, has better catalytic performance when being used as a catalytic oxidation carrier, and has the advantages of high conversion rate and high stability.

The invention relates to the technical field of fluorite ore beneficiation, discloses a fluorite ore flotation composite collecting agent and a preparation method and application thereof, and aims to solve the problems that an existing collecting agent is limited in applicability, insufficient in selectivity, poor in environmental stability and the like and is difficult to deal with separation of fluorite ore containing various impurities or under complex working conditions. The composite collecting agent is composed of dehydroabietylamine, sodium oleoyl sarcosinate, sodium silicate-citric acid composite salt, ethylene glycol butyl ether and a sodium carbonate-sodium bicarbonate buffer pair, all the components have a synergistic effect, dehydroabietylamine provides selective collecting and fine particle agglomeration functions, sodium oleoyl sarcosinate enhances adsorption stability, the composite salt inhibits gangue in a targeted mode, and therefore the adsorption efficiency is improved. Buffer pairs and ethylene glycol butyl ether guarantee the environmental adaptability of a system. The collecting agent can adapt to various fluorite ores with high sulfur, high silicon, low temperature and the like, can stably play a role under different water quality and working conditions, realizes efficient separation of fluorite and impurities, improves the separation efficiency and the concentrate quality, and is flexible in preparation process and convenient for industrial application.

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

The invention discloses a wear-resistant high-gloss nano liquid, a wear-resistant high-gloss ceramic tile and a preparation method of the wear-resistant high-gloss ceramic tile, and belongs to the technical field of ceramic manufacturing. The wear-resistant high-gloss nano liquid at least comprises a component A, a component B and a component C which are independently subpackaged, wherein the component A comprises large-particle silica sol, boric acid, sodium methyl silicate, carboxymethyl cellulose sodium, a boronizing stabilizer and the balance of water; the component B comprises a boronizing stabilizer and the balance of water-based modified silicone oil; and the component C is wax emulsion. Through systematic material and process innovation, the ceramic tile which is high in gloss, strong in antifouling property, durable in wear resistance and high in transportation performance is prepared, and the market requirements of surface treatment materials which are high in performance, low in cost and easy to transport are met.

The invention belongs to the field of cement concrete, and particularly relates to an integrated cementing material special for ultra-high performance concrete and a preparation method of the integrated cementing material. The integrated cementing material comprises fly ash, slag powder, carbide slag, semi-hydrated gypsum, silica fume, a powder reinforcing agent, calcium nitrate and sodium silicate. The production process of the integrated cementing material comprises the following steps: winnowing ultrafine microbeads from fly ash, grinding solid waste powder by a fluidized bed type jet mill, chemically strengthening the powder reinforcing agent, chemically nucleating calcium nitrate and sodium silicate, and mixing the integrated cementing material. The ultra-high performance concrete cementing material is prepared from a high-activity solid waste material, the viscosity of a mixture is reduced by winnowing ultrafine micro-beads, the strength of the cementing material is improved by synergistic reaction of slag powder, carbide slag and semi-hydrated gypsum, and a C-S-H crystal nucleus is formed by chemical reaction of calcium nitrate and sodium silicate to provide active sites, so that the cementing material is prepared. And the cementing material is prepared by combining powder chemical dispersion and integrated mixing, so that the carbon emission and production difficulty of the ultra-high performance concrete are remarkably reduced.

The invention provides a multi-scale super-amphiphobic anti-wax coating and a preparation method thereof.The preparation method comprises the following steps that S1, cellulose nanofibers are added into an ethyl alcohol-water mixed solution, after ultrasonic treatment and uniform stirring are conducted, sodium methyl silicate is added for stirring reaction, then fluorosilane and tetraethoxysilane are added for hydrolytic condensation reaction, and a mixed solution is obtained; centrifuging and drying to obtain multi-scale fluorinated micro-nano particles; and S2, mixing the multi-scale fluorinated micro-nano particles, an adhesive and a diluent in proportion, performing ultrasonic stirring, spraying the mixture on a base material, and curing to obtain the multi-scale amphiphobic paraffin-proof coating. Hydrophobic modification is carried out on cellulose nanofibers by using fluorosilane, sodium methyl silicate and tetraethoxysilane to form a multi-scale micro-nano multilevel structure, and the structure can effectively capture air and is combined with ground surface energy, so that the coating has excellent super-amphiphobic performance.

The invention relates to the technical field of ceramic materials, in particular to a preparation method of a diatomite-based porous ceramic material and application of the diatomite-based porous ceramic material in wastewater pollutant treatment. The preparation method of the diatomite-based porous ceramic material comprises the following steps: mixing a basic raw material, a sintering aid, a pore forming agent and a binder, performing compression molding to obtain a green body, and sintering the green body, the basic raw materials comprise 80-85% of diatomite, 5-10% of kaolin, 0-5% of feldspar and 5-10% of sodium silicate; the mass of the sintering aid is 5% higher than that of the basic raw material; the mass of the pore-forming agent is 25-45% of that of the basic raw material, and the pore-forming agent is selected from one or more than two of crystalline flake graphite, polymethyl methacrylate and spherical graphite. By controlling the composition and dosage of the basic raw materials, the sintering aid and the pore-forming agent, a micro-nano hierarchical pore structure is formed, mechanical properties and permeability are improved at the same time, and good filtration and interception performance on pollutants in wastewater is achieved.

The invention relates to the technical field of ceramic glaze water, in particular to ceramic glaze water capable of continuously releasing negative ions based on a rare earth material and a preparation method of the ceramic glaze water. Comprising a negative ion material, sodium polystyrenesulfonate, an immobilized bacterium preparation, carbon nanotube modified graphene oxide, turbo stone, modified sepiolite, nano-zinc oxide, sodium hexametasilicate, polyethylene glycol, a composite antioxidant, a coalescing agent, a slow-release carrier and deionized water. The negative ion material is formed by mixing low-radioactivity commercial rare earth powder, tourmaline and opal according to the mass ratio of (3-4): (4-5): 1. According to the invention, the preparation cost of the glaze water is reduced and the production efficiency is improved by optimizing the composition and compounding mode of the negative ion material, enhancing the stability of the bacterial preparation and simplifying the preparation process, meanwhile, the negative ion release durability, the ceramic surface adhesive force and the antibacterial property are remarkably enhanced, and the requirements of industrial production and practical application are met.

The invention relates to the technical field of cables, in particular to an aluminum alloy cable which is composed of an aluminum alloy conductor, an inner insulating layer, a fireproof wrapping tape layer and an outer sheath. The outer sheath is prepared from the following raw materials in parts by weight: 50 to 60 parts of ethylene-vinyl acetate copolymer, 20 to 30 parts of linear low density polyethylene, 10 to 20 parts of polyolefin elastomer, 5 to 10 parts of PPO-g-MAH, 20 to 30 parts of carbon black, 1 to 10 parts of organic phosphorus flame retardant, 20 to 30 parts of crusting agent and 1 to 3 parts of antioxidant; the aluminum alloy cable provided by the invention is light in weight, high in strength and excellent in fireproof and flame-retardant performance.

The invention discloses a carbide slag fly ash concrete aerated block and a preparation method thereof, and belongs to the technical field of resource utilization of building materials and solid waste. The aerated block comprises the following raw materials: carbide slag, fly ash, gypsum, Portland cement, aluminum powder paste, a nano core-shell structure calcium-aluminum-silicon polymer and a zwitterionic foam-stabilizing polymer, the raw materials have a specific weight part range. Wherein the nano core-shell structure calcium-aluminum-silicon polymer is prepared by dispersing fly ash in water to form slurry, reacting the slurry with sodium silicate and a sodium metaaluminate solution in sequence, then adding calcium nitrate and a zinc sulfate solution for continuous reaction, and carrying out separation, washing, drying and grinding; the zwitterionic foam-stabilizing polymer is prepared by polymerizing a monomer in a solvent, precipitating and separating out, quaternizing, activating carboxyl crosslinking, dialyzing and purifying, and freeze-drying. All the steps relate to process parameters such as dry mixing time, stirring time, curing temperature, pressure and time, and the performance of the aerated block is improved through component optimization and preparation process improvement.

The invention belongs to the technical field of industrial wastewater treatment and resource recovery, and particularly relates to an enhanced treatment method for recovering fluorine resources in semiconductor processing fluorine-containing wastewater. And step-by-step efficient recovery of sodium fluosilicate and calcium fluoride is realized through cooperation of precipitant compounding and pH regulation. The method comprises the following steps: firstly, adding a NaCl-NaHCO3 composite precipitator and sodium fluosilicate seed crystals to induce crystallization and recover hexagonal prism-shaped sodium fluosilicate single crystals; and after filtering, adding a CaCl2-Ca (OH) 2 composite precipitator and calcium fluoride seed crystals into the filtrate to generate large-particle calcium fluoride. And the impurity content in the recovered product respectively reaches the industrial sodium fluosilicate superior product standard and the metallurgical grade calcium fluoride secondary product standard. And the treated wastewater is neutral or weakly alkaline, so that the subsequent mixed treatment with other wastewater is facilitated.

The invention discloses a water glass-based full-life super-amphiphobic radiation refrigeration block material, which is prepared from the following raw materials in parts by weight: 1.5 to 3 parts of C-F long-chain modified micro-nano particles, 0.5 to 1.5 parts of water glass-based binder, 0.1 to 0.3 part of nano silicon dioxide sol and 0.05 to 0.16 part of curing catalyst, the C-F long-chain modified micro-nano particles are obtained by sequentially carrying out silane coupling agent grafting modification and fluorosilane grafting modification on nano particles with high sunlight reflectivity and micro particles with high sunlight emissivity. The super-amphiphobic function is converted into a three-dimensional block material from a two-dimensional coating, stress distribution optimization and interface bonding energy improvement are achieved while the ultra-low surface energy characteristic is kept, the problems of optical performance degradation and the like caused by surface pollution of the radiation refrigeration material are effectively solved, the mechanical durability of the material is essentially improved, and the service life of the radiation refrigeration material is prolonged. And the radiation refrigeration system can maintain stable performance in the whole life cycle.

The invention relates to a regenerated sand powder-based single-component alkali-activated core-shell aggregate and a preparation method thereof, and the core-shell aggregate comprises the following components in parts by mass: 2000 to 4000 parts of regenerated sand, 3000 to 5000 parts of regenerated powder, 1000 to 2000 parts of blast furnace slag powder, 100 to 650 parts of a single-component alkali activator and 1000 to 2000 parts of water. Compared with the prior art, the core-shell aggregate comprises reclaimed sand, reclaimed powder, blast furnace slag powder, solid sodium silicate and water. Wherein the regenerated sand, the regenerated powder and the blast furnace slag powder all belong to solid wastes, a single-component alkali activator (solid sodium silicate) excitation mode is adopted, the solid wastes which are complex in component, large in discreteness and difficult to effectively utilize are polymerized into the artificial aggregate with uniform quality, and high-value utilization of the solid wastes is achieved; and meanwhile, the feasibility of commercial batch production of the artificial aggregates is improved.

The invention relates to the technical field of concrete, and particularly discloses low-temperature-resistant self-repairing waterproof concrete for water conservancy and a preparation method of the low-temperature-resistant self-repairing waterproof concrete. The water conservancy low-temperature-resistant self-repairing waterproof concrete is specifically prepared from the following components in parts by weight: 70 to 80 parts of cement, 10 to 20 parts of fly ash, 8 to 12 parts of silica fume, 2.5 to 3.5 parts of a reinforcing material, 0.2 to 0.4 part of a crystallization inducer, 1.5 to 2.5 parts of a repairing agent and 20 to 40 parts of water, the reinforcing material is formed by mixing nano silica sol, bentonite, quartz sand and triethanolamine; the crystallization inducer is formed by mixing sodium silicate and aluminum hypophosphite; the repairing agent is obtained by loading calcium ions on an amino silane modified zeolite material and then mixing with a bacillus pasteurii bacterial solution. By utilizing the technical scheme provided by the invention, the prepared concrete has excellent mechanical properties, water resistance, impermeability, freezing resistance, crack resistance and good durability.

The invention relates to the technical field of oil and gas field exploitation, and discloses a pressure-resistant quartz sand proppant and a preparation process and application thereof, and the proppant is composed of a quartz sand base material and a multi-layer composite coating coated on the quartz sand base material. The interface grafting layer is chemically bonded with the surface of quartz sand through a silane coupling agent; a latent acid source is utilized to slowly release acid under a heating condition, the sodium silicate in-situ hydrolysis condensation polymerization rate is accurately regulated and controlled, and nano silicon dioxide is used as a nucleation point to construct a compact inorganic nano composite inner shell; the outermost layer is coated with the organic toughening shell. According to the preparation method, the reaction process of the inorganic inner shell is accurately regulated and controlled, and the interface grafting and outer layer toughening technology is combined, so that a synergistically enhanced composite structure among the coatings is formed. According to the structure, the quartz sand propping agent is endowed with extremely low compaction breakage rate and excellent long-term flow conductivity, and the fracturing operation requirements under high-temperature and high-pressure harsh conditions of deep wells, ultra-deep wells and the like can be met.

The invention discloses geopolymer cement based on coal gangue activation reaction as well as a preparation method and application thereof, and relates to the technical field of building materials. The invention relates to a coal gangue concrete, which is prepared from the following raw materials in percentage by mass: 50 to 70 percent of activated coal gangue powder, 5 to 15 percent of alkali activator, 10 to 30 percent of auxiliary cementing material and water, wherein the water accounts for 30 to 40 percent of the total mass of the activated coal gangue powder, the alkali activator and the auxiliary cementing material. Through a composite activation process of medium-temperature calcination decarburization and superfine grinding, the activity of silicon-aluminum components in the coal gangue is effectively excited, the reaction efficiency is remarkably improved, the mixing amount of the coal gangue reaches 50%-70%, the resource utilization rate of solid waste is greatly increased, and efficient activation and resource utilization of the coal gangue are achieved. By adopting the methyl sodium silicate and sodium silicate composite activator, the reaction rate and the product structure are regulated and controlled, and the workability and the setting and hardening behaviors of slurry are improved, so that the obtained geopolymer cement has relatively high early and later strength and excellent durability.

The invention relates to the field of building materials, in particular to a novel non-combustible composite board and a preparation process thereof. The novel non-combustible composite board comprises a base material layer, a fire-resistant flame-retardant layer and a protective surface layer which are sequentially arranged from bottom to top, the fireproof flame-retardant layer comprises the following components in parts by mass: 40-55 parts of a halogen-free flame retardant and 15-18 parts of a fiber auxiliary agent, and the halogen-free flame retardant comprises carboxylic acid modified aluminum hydroxide, silicon modified magnesium hydroxide and layered sodium silicate. Aiming at the problems that an existing composite board is poor in flame retardance, low in flame retardant efficiency, poor in board toughness, prone to cracking, poor in interlayer bonding performance and prone to delamination at high temperature, the combustion performance of the prepared novel non-combustible composite board completely meets the A2-level requirement, the combustion heat value is small, and the novel non-combustible composite board has the advantages of being good in toughness, high in strength and not prone to cracking.

The invention provides a water-resistant building gypsum-based material and a preparation method thereof. The material comprises a building gypsum base body, a hydrophobic film is cured on the surface of the building gypsum base body, and the hydrophobic film is formed by curing waterproof liquid; the building gypsum base body is prepared from four components including desulfurized building gypsum, blast furnace slag, calcium oxide and water, the water-binder ratio is 0.5-0.6, the mass ratio of the blast furnace slag to the desulfurized building gypsum is (1-5): (5-9), and the mass of the calcium oxide is 2%-10% of that of the blast furnace slag; the waterproof liquid comprises water, sodium methyl silicate, tetraethoxysilane, dimethyl silicone oil, sodium hydroxide and sodium silicate. According to the preparation method, a proper waterproof treatment mode is selected according to the size of a workpiece. The blast furnace slag and the calcium oxide are introduced into the desulfurized building gypsum formula, the calcium oxide can effectively excite the activity of the blast furnace slag in a building gypsum matrix, so that the water resistance of a building gypsum-based material is improved, the water resistance of the material is further improved by the waterproof liquid, and meanwhile, the material is endowed with hydrophobicity.

The invention relates to the technical field of overhead conductors, and provides a high-conductivity overhead conductor which sequentially comprises a reinforcing core, an inner aluminum wire layer and an outer aluminum wire layer from inside to outside, each of the inner aluminum wire layer and the outer aluminum wire layer is formed by twisting a plurality of aluminum wires, and the reinforcing core is formed by twisting a plurality of galvanized steel wires; the preparation method of the reinforced core comprises the following steps that a steel wire is sequentially subjected to alkali washing, acid pickling, plating assisting, hot-dip galvanizing, passivation and twisting to obtain the reinforced core; during passivation, a passivation solution is prepared from, by weight, 20-25 parts of waterborne polyurethane, 15-20 parts of sodium silicate, 4-8 parts of sodium nitrate, 5-10 parts of modified graphene oxide, 3-5 parts of polyethylene glycol, 0.2-0.4 part of glacial acetic acid and 70-80 parts of water, and the modified graphene oxide is prepared from graphene oxide, a silane coupling agent and 3-aminopyrazine-2-carboxylic acid methyl ester. The problem of poor corrosion resistance of the overhead conductor in the prior art is solved.

The invention provides alkali-activated mortar based on a low-carbon composite excitation system and a preparation method of the alkali-activated mortar, and belongs to the technical field of low-carbon mortar preparation. Raw materials of the alkali-activated mortar based on the low-carbon composite activation system comprise a low-carbon composite solid activator, a precursor and a fine aggregate, the low-carbon composite solid activator comprises borax, anhydrous sodium silicate and sodium carbonate / sodium sulfate, the modulus of the anhydrous sodium silicate is 1.0-1.75, the doping amount of the borax is 0.5-1.5 Na2O%, the doping amount of the sodium carbonate or sodium sulfate is 0.375-1.5 Na2O%, and the doping amount of the fine aggregate is 0.5-1.5 Na2O%. The water-binder ratio is 0.38, the total alkali consumption is 5Na2O%, and the sand-binder ratio is 0.4. By optimizing a solid alkali activator system, the problems that a traditional alkali-activated material is poor in working performance, unbalanced in mechanical property, insufficient in volume stability, poor in environment-friendly economy and the like are solved, and a feasible path is provided for engineering application of a high-performance low-carbon alkali-activated cementing material.

The invention discloses a quick-hardening early-strength concrete mineral additive and a preparation method thereof, and belongs to the technical field of building materials. The additive comprises the following components in parts by weight: 50-75 parts of a mineral active material (compounded by silica fume, slag powder and metakaolin), 15-30 parts of a composite activator (sodium silicate, lithium sulfate and triethanolamine synergistically), 5-10 parts of a sustained-release microcapsule (calcium sulphoaluminate coated with nano-silica) and 2-5 parts of an auxiliary thickening agent (compounded by HPMC and a water reducing agent). The preparation method comprises the steps of mineral activation, excitant reaction and mixing of the microcapsule and the thickening agent. After the additive is doped into concrete, the 3h compressive strength is greater than or equal to 15MPa, the initial setting time is less than or equal to 5min, and the additive has low resilience (less than or equal to 13%), high durability (impermeability is greater than or equal to P11) and environmental adaptability (-5 DEG C strength fluctuation ratio is less than or equal to 9%). And compared with the prior art, the cost is reduced by 40%, and the method has remarkable economic and social benefits.

The invention discloses a production method of water-resistant spherical silica gel for a catalyst carrier, and belongs to the technical field of new silica gel materials. The method comprises the following steps: taking a sodium silicate aqueous solution or alkoxy silane as a silicon source, mixing the silicon source with a template agent according to a mass ratio of 100: (1-10), adding nano silicon dioxide, and carrying out ultrasonic dispersion to obtain uniform sol; mixing the sol and a non-polar organic solvent according to a volume ratio of 1: (3-8) to form an oil-in-water emulsion, and dropwise adding a promoting solution to form microspheres with an average particle size of 400 [mu] m; mixing the microspheres with a pore expanding agent according to a mass ratio of 1: (8-15), and carrying out hydrothermal reaction to obtain a skeleton; reacting the skeleton with a silicon-based modifier according to a mass ratio of 10: (0.2-1.5); activating by hydrofluoric acid, and grafting a bifunctional coupling agent on the surface; supercritical extraction and thermal activation treatment. The specific surface area of the prepared silica gel is 492.7-533.0 m < 2 > / g, the pore volume is 0.83-1.04 cm < 3 > / g, the pore diameter is 8.2-10.9 nm, the water-resistant strength retention rate is 90.8-94.4%, the compressive strength is 10.7-12.6 MPa, the particle size variation coefficient is 3.1-4.3%, compared with traditional silica gel, the specific surface area of the silica gel is remarkably improved, and the silica gel is suitable for the field of wet catalysis.

The present application relates to pulping technology field, the present application provides a kind of high-strength high-cleanliness chemical pulp's pulping process, with bamboo willow edge scrap as fiber raw material, after 1 stage pre-steaming, chip washing, dehydration, 2 stage pre-steaming;The wood chip material after 2 stage pre-steaming is 1 stage extrusion and is dissolved, 1 stage chemical liquid pre-impregnation, 2 stage extrusion and is dissolved, 2 stage chemical liquid pre-impregnation;1 stage chemical liquid pre-impregnation uses sodium hydroxide solution and does not use hydrogen peroxide, the chemical reagent of 2 stage chemical liquid pre-impregnation process is sodium hydroxide, hydrogen peroxide and sodium silicate;Material after 2 stage chemical liquid pre-impregnation is 1 stage refining, separation, cooling, 1 stage high-concentration bleaching, 1 stage dehydration, 2 stage high-concentration bleaching, 2 stage dehydration;Pulp after 2 stage dehydration is latent, refining etc., and the finished product is prepared.This application process can produce high-strength, high-cleanliness chemical pulp, and the pulp cost is lower, and the pulp quality is better, and it is beneficial to high-end cultural paper etc. application.

The application relates to the technical field of building materials, and discloses a permeable crystalline self-healing waterproof material for concrete self-waterproofing, which is prepared from the following raw materials in parts by weight: 20-30 parts of sodium-based bentonite, 20-50 parts of sodium methyl silicate, 4-6 parts of a penetrating agent, 8-12 parts of a sulphoaluminate cement, 15-18 parts of a silicone zirconium, and 2-5 parts of a complexing agent; the complexing agent is composed of 2-[3-(4-pentylphenyl)prop-2-enylamino]benzoic acid and sodium ethylenediaminetetraacetate. The above technical scheme solves the problem of low mechanical performance and waterproofness of concrete in the prior art.

The invention discloses polymer-based anti-crack concrete and a preparation method thereof, and relates to the technical field of concrete. When the polymer-based anti-crack concrete is prepared, acrylic acid is grafted on the surfaces of pretreated polypropylene particles to prepare modified polypropylene particles; coating sodium metasilicate with sodium alginate to prepare a self-repairing microcapsule; the preparation method comprises the following steps: hydrolyzing 3-glycidyl ether oxypropyl trimethoxy silane, and grafting the hydrolyzed 3-glycidyl ether oxypropyl trimethoxy silane on the surface of silicon dioxide to prepare modified silicon dioxide; mixing the modified polypropylene particles, basalt fibers and polyacrylonitrile fibers to obtain a solid functional component; cement, slag powder, silica fume, an expanding agent, a solid functional component, modified silicon dioxide, a water reducing agent, an air entraining agent, deionized water, river sand, gravel and the pre-wetted self-repairing microcapsule are mixed, and the polymer-based anti-crack concrete is prepared. The polymer-based anti-crack concrete prepared by the invention has excellent anti-crack, freeze-thaw-resistant and self-repairing properties.

The present application relates to the field of inorganic non-metallic materials, and particularly relates to a method for preparing high-dispersity white carbon black by multi-kettle series pressure carbonization, which comprises the following steps: (1) taking sodium silicate with a modulus of 3.1-3.4 as raw material, and introducing carbon dioxide gas into a reaction kettle to perform carbonization reaction, and stopping the reaction when the pH of the solution is 6-9 to obtain white carbon black slurry; (4) performing filtration, washing and drying treatment on the slurry obtained in step (3) to obtain a white carbon black sample. The present application adopts the mode of adding crystal seeds and multi-kettle series pressure carbonization, which can prepare high-dispersity white carbon black product on one hand, and is beneficial to shorten the reaction time, reduce the energy consumption and improve the raw material utilization rate on the other hand, and provides a new idea for the preparation of high-dispersity white carbon black and has a good industrial prospect.