523results about "Cement production" patented technology

The invention relates to the technical field of cement materials, in particular to a red-mud-containing steel slag composite cementing material and a preparation method thereof.The method comprises the steps that red mud, slag, steel slag, desulfurized gypsum and sulphoaluminate cement clinker are subjected to dry mixing to obtain an initial mixture; determining whether the excitation capability of the potential hydration activity reaches the standard or not based on the alkaline matching index, and adjusting the weight part of the sulphoaluminate cement clinker; adding a composite exciting agent to obtain activated slurry; determining whether the dispersion effect of the flocculation structure of the initial mixture is qualified or not based on the dispersion index of the flocculation structure, and adjusting the ball milling rotating speed; adding a polymer emulsion to obtain an initial composite cementing material; determining whether the synergistic enhancement effect of the polymer emulsion and the activated slurry is qualified or not based on the synergistic enhancement index, and adjusting the dripping rate of the polymer emulsion; the steel slag composite cementing material containing the red mud is obtained. The preparation stability of the red mud-containing steel slag composite cementing material is improved.

The invention discloses a high belite iron aluminate cement clinker, which is prepared from the following raw materials in parts by weight: 39 to 73 parts of carbide slag, 8 to 37 parts of low-grade bauxite, 10 to 16 parts of ardealite, 1 to 31 parts of fly ash and 3 to 9 parts of steel slag. According to the cement clinker, the resource utilization rate of industrial solid waste in cement preparation can be remarkably increased, and dependence on natural raw materials and high-grade raw materials is reduced; impurities in various solid wastes can be used as in-situ mineralizing agents and activating agents, and on the basis of realizing high-added-value resource utilization of various industrial solid wastes and low-grade bauxite, efficient synthesis of target minerals at a relatively low temperature is promoted; and gradient temperature control calcination and gradient cooling processes are further combined, so that sufficient crystallization and development of a target mineral phase can be effectively promoted, a clinker microstructure is optimized, excellent early strength and continuously increased later strength of the cement are ensured, and the common problems of strength shrinkage and the like of the traditional solid waste-based cement can be effectively avoided.

The invention discloses sulfate-erosion-resistant metakaolin-slag-based geopolymer concrete, belongs to the technical field of concrete, and aims to solve the problems that the corrosion resistance of traditional silicate concrete is ineffective and the adaptability of conventional alkali-activated concrete is insufficient in a special environment. The concrete comprises the following components in parts by weight: 60-90 parts of a cementing material, 120-170 parts of aggregate, 15-30 parts of a composite activator, 2-8 parts of a function regulator and the like, the cementing material is prepared from nano TiO2 / KH-550 composite modified metakaolin, slag and silica fume-coal gangue powder-HAP composite powder; the aggregate comprises modified limestone macadam (soaked and dried by a sodium dihydrogen phosphate solution) and river sand; the composite exciting agent comprises water glass, sodium hydroxide, sodium pyrophosphate, propylene glycol and the like; the function regulator comprises superfine fly ash, a naphthalene water reducer, HPMC (Hydroxy Propyl Methyl Cellulose) and boric acid. Through the synergistic effect of the components, the sulfate corrosion resistance, the mechanical property and the environmental adaptation performance of the concrete are improved, and the concrete is suitable for engineering construction under the service environment of high-concentration sulfate and the like.

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 technical field of gelling materials, in particular to a gelling material based on high-doping-amount shield muck and a preparation method and application thereof.The preparation method comprises the following steps that after original shield muck is sequentially subjected to mechanical crushing, forced homogenization and drying to constant weight, gradient heating calcination is conducted, then rapid cooling is conducted immediately, and the high-doping-amount shield muck is obtained; carrying out two-stage ball milling and sieving to obtain active shield muck powder; preparing a solid dry blend; preparing a composite alkali activator solution; and mixing the composite alkali activator solution with the solid dry blend, primarily stirring and infiltrating, adding the residual mixing water, stirring to obtain uniform geopolymer slurry, and compacting and molding to obtain the cementing material. The problems that in the prior art, a high-performance geopolymer cementing material based on shield muck is low in activity, insufficient in strength, small in shield muck mixing amount, single in performance and poor in volume stability are solved.

The present application belongs to the technical field of underground filling of metal mines, and particularly relates to an iron tailings powder-based cementitious material for mine full tailings cemented filling, a preparation method and application thereof. The geopolymer-based anti-cracking mortar is made of iron tailings ultrafine powder, ore powder, sulphoaluminate clinker, Portland cement clinker, desulfurization gypsum and methyl cellulose ether. The iron tailings powder-based cementitious material can completely replace ordinary Portland cement in full tailings filling and achieve better cementing effect than cement, thereby greatly reducing the consumption of cement and other cementitious materials, lowering the filling cost, reducing carbon emissions and increasing the utilization rate of tailings. The rheological properties, mechanical properties and durability of the full tailings cemented filling material made of the iron tailings powder-based cementitious material can meet the requirements of mine filling, and the material can achieve the effect of expansion and roof contact without adding external additives, thereby solving the shrinkage problem of cement-based filling materials.

The invention discloses a geopolymer-based recycled fine aggregate shield synchronous grouting material and a preparation method thereof. The grouting material is composed of a cementing material, an alkali activator, aggregate, a water reducing agent, a retarder and water, and the cementing material is a geopolymer precursor and is composed of fly ash, slag and metakaolin; the aggregate is composed of river sand and recycled fine aggregate. By optimizing the proportion and the preparation process, the material has the characteristics of excellent flowability, controllable setting time, high early strength, good impermeability, good durability and the like, and is suitable for synchronous grouting of shield tunnels in water-rich sand layers, high-water-pressure stratums or corrosion stratums. The invention also provides two optimization methods which are respectively based on a response surface method and a BP neural network combined genetic algorithm to realize multi-objective optimization of slurry performance. According to the material, dependence on traditional cement and gravel resources is remarkably reduced, energy consumption and carbon emission are reduced, high-added-value resource utilization of industrial solid waste and construction waste is achieved, and the material conforms to the development direction of green low-carbon building materials.

The application discloses a high-value resource utilization system and method of waste concrete, and the system comprises a preheating subsystem, a calcining subsystem, a cooling subsystem, a separating subsystem, a crushing subsystem, a dust collecting subsystem and a conveying subsystem. Waste concrete which is coarsely separated and pre-homogenized is mixed into cement raw materials to produce silicate cement clinker, and the test block after coarse crushing, screening, fine crushing and screening is directly stripped, and the separated powder can be used as a mixing material; the test block after stripping is preheated and calcined in a rotary kiln, the obtained material is cooled and stripped, and then sent into a V-type powder separator to separate coarse aggregates, and the fine aggregates and recycled waste concrete micro powder are separated through the powder separator and a dust collector. The application realizes the synergistic effect of pollution reduction and carbon reduction by combining with a cement production line, separates fine aggregates, coarse aggregates and hardened cement paste in the waste concrete, and realizes the high-value resource utilization of the waste in multiple ways according to the characteristics of each component.

The application belongs to the technical field of new materials, and relates to a geopolymer foam material with a vein-shaped multistage network pore structure and a preparation method thereof. The application comprises the following steps: pretreating luffa, cow horn fiber and coconut fiber respectively, and loading catalysts; uniformly mixing fly ash floating beads, metakaolin, slag, an anionic surfactant, the cow horn fiber loaded with catalysts and the coconut fiber loaded with catalysts to obtain mixed powder; mixing the mixed powder with an alkali activator to prepare a slurry, adding a chemical foaming agent into the slurry, and then pouring the slurry into the luffa loaded with catalysts, and then sequentially performing foaming and curing treatment; and performing freeze-drying and calcination on the cured material, and the geopolymer foam material is obtained; the geopolymer foam material prepared by the application has a vein-shaped multistage pore structure, can have physical and chemical adsorption properties on heavy metal ions and cationic dyes, and can remove pollutants such as macromolecules, microorganisms, perfluoroalkyl compounds and ammonia nitrogen compounds.

The invention relates to the technical field of mixed gels, in particular to a preparation method and application of a composite solid waste-based cementing material, and the preparation method comprises the following steps: grinding dried granulated blast-furnace slag, steel slag, fly ash, iron tailings, phosphogypsum and Portland cement, mixing to obtain a pretreated powder raw material, adding a modified activator into the pretreated powder raw material, and uniformly mixing to obtain the composite solid waste-based cementing material. And stirring to obtain the composite solid waste-based cementing material. The synergistic effect of the alkaline activator and the sulfate activator is matched with the nucleation induction effect of the mineral modified admixture, so that hydration process synchronization of multiple solid waste components is realized, sulfate, Ca < 2 + > and an aluminum phase quickly generate ettringite, the mineral admixture is used as a crystal nucleus for growth of a hydration product, the hydration induction period is greatly shortened, and the hydration efficiency is improved. The early strength development rate of the material is increased, the later strength is continuously increased without shrinkage, and the engineering pain point of insufficient early strength or later strength stagnation of a traditional solid waste-based material is solved.

The application relates to the technical field of cement manufacturing, and discloses a grinding system which comprises a roller pressing system, a vertical mill system and a ball mill system, the discharge port of the roller pressing system and the discharge port of the vertical mill system are both connected to the feed port of the ball mill system; the roller pressing system is used for grinding first material, and the vertical mill system is used for grinding second material; the ball mill system is used for receiving the ground first material and the ground second material, and mixing the ground first material and the ground second material to obtain required third material; wherein the roller pressing system is further used for distributing a part of the ground first material to the ball mill system and returning another part of the ground first material to the roller pressing system for regrinding; and / or the vertical mill system is further used for distributing a part of the ground second material to the ball mill system and returning another part of the ground second material to the vertical mill system for regrinding, so that the appearance grading of the third material can be improved, and the energy consumption of the grinding system can be reduced.

A geopolymer precursor includes an alkaline reactive solid material containing aluminum, silicon, and oxygen, and a fluid loss control material having an ionic stability property that has a first value in water and a second value in a 3M solution of NaOH, wherein a ratio of the second value to the first value is in a range of 0.5 to 2.0. The fluid loss control material may be, or may include a crosslinked polymer, which may include a reaction product of one or more of acrylamide, 2-acrylamido-2-methyl propane sulfonic acid, N,N‑dimethylacrylamide, N,N‑diethylacrylamide, vinyl acetate, or another monomer, and a crosslinker including one or more of methylene bisacrylamide, triallyl amine, pentaerythritol allyl ether, triallyl-triazine-trione, or another material. The geopolymer precursor may include an activator, an alkaline solution having pH of at least about 9, or both.

The application discloses a preparation method of high-content coal gasification slag-based cement, and belongs to the technical field of solid waste resource utilization. High-carbon coal gasification slag, steel slag, carbide slag and clay are used as raw materials, low-carbon coal gasification slag, circulating fluidized bed fly ash and desulfurization gypsum are used as active admixtures, the rate value is designed and the configuration proportion of various raw materials and active admixtures is calculated according to the chemical composition of the finally prepared high-content coal gasification slag-based cement; then the various raw materials and active admixtures are pretreated, the pretreated raw materials are mixed, ball milled and sieved to prepare cement raw materials and further prepare cement clinker; finally, the cement clinker and the active admixtures are mixed, ball milled and sieved to prepare the high-content coal gasification slag-based cement. The high-content coal gasification slag-based cement is prepared by fully utilizing industrial solid wastes, can replace natural raw materials for producing cement, meets the national "double carbon" planning, and is a low-carbon, environment-friendly and green cement preparation method.

The application discloses a sorting device for geopolymer recycled concrete production and a working method thereof. The sorting device comprises a main body, a feeding cavity is formed in the upper end of the inside of the main body, a sorting chamber is formed below the feeding cavity and is communicated with the feeding cavity, a PLC controller is mounted on one side of the front end of the main body, rotating doors are movably mounted on the two sides and the front and back ends of the main body, a rotating shaft is rotatably arranged in the inside of the feeding cavity, spiral conveying blades are welded to the outer wall of the rotating shaft, a threaded transmission rod is rotatably arranged on one side of the upper end of the inside of the sorting chamber, and a moving block is threadedly connected to the outer part of the threaded transmission rod. The sorting device can avoid the influence of metal impurities on subsequent sorting, improve the sorting effect, make the metal impurities enter the inside of a second collecting frame, facilitate a user to collect and take out the metal impurities, and can inhale generated dust to avoid the diffusion of the dust, thus being good in practicability.

The invention discloses a magnetic geopolymer as well as a preparation method and application thereof, and relates to the technical field of solid waste resource utilization and wastewater treatment. The preparation method comprises the following steps: drying nickel slag, crushing and grinding, adding calcium oxide to adjust alkalinity, and heating and melting to obtain a nickel slag melt; the nickel slag melt is subjected to water quenching, and magnetic slag micro powder is obtained through drying, crushing and screening; and mixing the magnetic slag micro powder with an alkaline activator, injecting the mixture into a mold, performing constant-temperature maintenance, demolding, and crushing to obtain the magnetic geopolymer. The magnetic geopolymer prepared by the invention has high adsorption capacity and rapid adsorption kinetics for multiple heavy metal ions in water, and has excellent magnetic separation performance.

The application provides a geopolymer zinc-rich anticorrosive coating and a preparation method and use method thereof. The geopolymer zinc-rich anticorrosive coating comprises slag, metakaolin, water glass, zinc powder, a filler and an additive. The application solves the problem of poor mechanical properties caused by excessive zinc powder content. The problem of poor protection of the coating caused by excessive zinc powder content can be effectively avoided by high-temperature (450-500 DEG C) baking of the geopolymer zinc-rich anticorrosive coating. The molten zinc powder can completely fill the pores between the coating and the zinc powder and form a dense passivation film. Compared with the traditional zinc-rich coating, the high-temperature baked zinc-rich anticorrosive coating has higher hardness, wear resistance, corrosion resistance and heat resistance.

The invention provides a process for preparing cement from aluminum electrolysis overhaul residues and waste anti-seepage material lithium extraction residues, and relates to the technical field of solid waste co-treatment and resource utilization, and the process comprises the following steps: mixing pretreatment: crushing and grinding mixed raw materials, adding a calcium-based fluorine fixing agent, and roasting to decompose cyanide and stabilize fluoride; preparing a cement raw material: mixing the mixed residues with other raw materials according to a certain ratio, adjusting the ratio value, and grinding to prepare the cement raw material; calcining the clinker, namely calcining the raw material at high temperature, treating flue gas, and quickly cooling to obtain the cement clinker; according to the invention, a carbonaceous material in the overhaul slag is utilized to provide part of heat, so that the energy consumption is reduced; fluorides in the two wastes react with each other to generate a more stable compound, so that the fluorine curing efficiency is improved, and the environmental risk is thoroughly eliminated; heavy metal is further solidified in a cement kiln high-temperature environment, harmless treatment is achieved, the resource utilization rate is increased, and product performance is reliable.

The application provides a quick-setting anti-freezing geopolymer pavement base material and a preparation method thereof, and belongs to the technical field of geopolymer materials. The application takes red mud and titanium white slag as precursor materials, takes carbide slag as an alkali activator, and simultaneously adds anti-freezing reinforcing materials compounded by white mud, ceramic powder and brick powder. The geopolymer pavement base material is formed by compounding multiple components, fully utilizes multiple high-alkaline and silicon-aluminum-rich solid waste resources, has the comprehensive advantages of low carbon, environmental protection, low cost, short construction period, excellent anti-freezing performance and the like, breaks through the technical bottlenecks of slow low-temperature setting and poor durability of the pavement base material in cold regions, and is suitable for highway, municipal road and border road engineering in high-cold regions. The application has important engineering significance and popularization value for green traffic infrastructure construction in cold regions.

The invention relates to a mineral binder suitable for use in binding aggregate in a mineral mortar or concrete mixture, said binder comprising the following components: a) at least 40 wt% of calcined kaolinitic clay and ultrafine crushed CDW, wherein the ratio between calcined clay and ultrafine crushed CDW is between 3:7 and 1:1 (w / w), b) optionally 2-50 wt.% of a chemical activator; and wherein the calcined kaolinitic clay, the ultrafine crushed CDW and the optionally present chemical activator are present in a combined amount of at least 90 wt.%, based on the total weight of the binder. The invention further relates to mineral mortar or concrete mixtures based on this mineral binder, as well as building units made from these mixtures.

The present application relates to the technical field of cementitious materials, in particular to a cementitious material based on large amount of shield muck and a preparation method and application thereof, comprising the following steps: the original shield muck is sequentially subjected to mechanical crushing, forced homogenization, drying to constant weight, gradient temperature calcination, rapid cooling immediately after, two-stage ball milling and sieving to obtain active shield muck powder; preparing solid dry mixture; preparing composite alkali activator solution; mixing the composite alkali activator solution with the solid dry mixture, preliminarily stirring and soaking, adding the remaining mixing water to stir to obtain uniform polymer slurry, then vibrating and forming to obtain the cementitious material. The present application solves the problems of low activity, insufficient strength, small amount of shield muck, single performance and poor volume stability of the high-performance geopolymer cementitious material based on shield muck in the prior art.

The invention relates to a modified geopolymer and a modified geopolymer composite comprising additive. The additive is preferably an athermanous additive. The modification is with one or more water-soluble compounds, the water-soluble compound is preferably selected from phosphorus compounds, nitrogen compounds, copper compounds, silver compounds, zinc compounds, tin compounds, and magnesium compounds. Also, it relates to compositions which contain the modified geopolymer or modified geopolymer composite.

The present application relates to the technical field of fireproof coating, and particularly relates to a geopolymer-based aerogel fireproof coating, a preparation method and application thereof. The fireproof coating comprises the following components in the following proportions: geopolymer precursor material, alkaline activator, aerogel, fiber and water; the mass ratio of the alkaline activator and the geopolymer precursor material is 0.52-0.63:1; the volume content of the aerogel is 70%-85%; the mass content of the fiber is 0-1% and is not 0; and the water-binder ratio is 0.5-0.7. The added fiber can effectively inhibit the high-temperature shrinkage of the coating, and at the same time, to a certain extent, improve the tensile strength and tensile bonding strength, so as to ensure the structural stability and continuous fireproofing capability of the coating in a fire scene; by optimizing the aerogel content and the water-binder ratio, the coating realizes an excellent balance between the thermal conductivity and the compressive strength, and has the characteristics of high strength and efficient heat insulation; the production process of the present application is low-carbon and environmentally friendly, and has economic and environmental benefits.

The application discloses a kind of low dielectric high-strength phosphate-based geopolymer and preparation method thereof.The preparation method includes the following steps: (1) acid activator pretreatment: phosphoric acid solution is mixed with water to carry out ion balance treatment, and fully ionized pre-equilibrium acid activator is obtained;(2) mixed pulping: siliceous raw material is mixed with the pre-equilibrium acid activator, the molar ratio of P / Al is controlled to be 0.6-1.2, and uniform geopolymer slurry is obtained by stirring;(3) forming and curing: the slurry is cast into shape and cured, and an Al-O-P covalent bond dominated network skeleton is constructed to obtain a green geopolymer;(4) dehydration treatment: the green geopolymer is subjected to dehydration treatment.The application effectively solves the problems of high loss, easy moisture absorption and mutual exclusion of strength and dielectric properties of inorganic cementing materials at high frequency, and is suitable for 5G / 6G high-frequency communication, radar wave-transparent, electronic packaging and intelligent building fields.

The utility model discloses environment-friendly low-alkali cement grinding aid stirring equipment which comprises a stirring machine shell, an inner cavity is fixedly connected in the stirring machine shell, the top end of the inner cavity is in threaded connection with a first rotating shaft, a plurality of push type paddles are fixedly connected to the first rotating shaft in the vertical direction, and the first rotating shaft is in threaded connection with a second rotating shaft in the vertical direction. The top surface of the stirrer shell is fixedly connected with a motor I, and the output end of the motor I is fixedly connected with the rotating shaft I; a second rotating shaft is in threaded connection with the top end of the stirrer shell, a plurality of turbo type paddles are fixedly connected to the second rotating shaft in the vertical direction, a second motor is fixedly connected to the top face of the stirrer shell, and the output end of the second motor is fixedly connected with the second rotating shaft; liquid components are mixed with low shear force in the pre-stirring stage of the push-type paddle, the scrapers synchronously remove attachments on the wall of the cavity, and the turbo-type paddle rapidly crushes solid particles through high shear force and promotes uniform fusion of materials, so that the reaction activity of the grinding aid and the stability of a finished product are remarkably improved.

The utility model discloses a switchable cement grinding device, and relates to the technical field of cement grinding. The switchable cement grinding device comprises a roller press, mounting plates are fixedly connected to the front side and the rear side of the position of a discharging opening of the roller press, a first conveying belt is fixedly connected to the positions, located at the lower end of the discharging opening of the roller press, of the inner sides of the mounting plates, and an adjusting conveying belt is arranged at the lower end of the right side of the first conveying belt; the adjusting conveying belt is rotationally connected with the interior of the mounting plate, an adjusting motor is fixedly connected to the front end of the rotating position of the adjusting conveying belt and the mounting plate, a second conveying belt is arranged at the lower end of the right side of the adjusting conveying belt, and a ball mill is arranged on the right side of the second conveying belt; and the right side of the second conveying belt communicates with a feeding port of the ball mill, a third conveying belt is arranged at the lower end of the adjusting conveying belt, a V-shaped airflow classifier is arranged on the front side of the third conveying belt, and a control cabinet is installed at the front end of the roller press.

The utility model discloses an industrial waste residue composite cementing material preparation system which comprises a first calcining furnace, a kaolin feeding hole and a bauxite feeding hole are formed in the first calcining furnace, the first calcining furnace is connected with a first mixing kettle, and a coal ash feeding hole and a 10% sodium hydroxide solution feeding hole are formed in the first mixing kettle; the outlet end of the second calcining furnace is connected with the inlet end of the dehydrating tower, the outlet end of the dehydrating tower is connected with the inlet end of the second calcining furnace, the second calcining furnace is provided with a sodium dihydrogen phosphate feed port and a urea feed port, and the second calcining furnace is connected with the second mixing kettle; the second mixing kettle is provided with a red mud feeding hole, a coal gangue feeding hole, a metallurgical slag feeding hole and a glass water feeding hole; and the second mixing kettle is sequentially connected with the air furnace, the grinding kettle and the finished product bin. According to the utility model, the stockpiling of industrial solid wastes can be reduced, the environmental pollution can be effectively reduced, and the problem of infrastructure material shortage can be effectively relieved on the premise of ensuring the engineering quality.

This invention relates to a method for in-situ synthesis of visible light photocatalytic geopolymers from vanadium-containing solid waste. The technical solution is as follows: vanadium-containing solid waste is ground into powder, and the resulting vanadium-containing solid waste powder is mixed with vanadium pentoxide powder. The resulting vanadium-containing geopolymer precursor is mixed with an alkaline activator and stirred evenly to obtain a vanadium-containing geopolymer slurry. The vanadium-containing geopolymer slurry is placed in a mold, cured, demolded, cured a second time, and crushed to obtain a crushed vanadium-containing geopolymer. The crushed vanadium-containing geopolymer is mixed with deionized water to obtain a vanadium-containing geopolymer aqueous solution. Bismuth nitrate solution is added to the vanadium-containing geopolymer aqueous solution, mixed evenly, and the pH value is adjusted. A hydrothermal reaction is then carried out. Solid-liquid separation, washing, and drying are performed to obtain the visible light photocatalytic geopolymer. This invention can efficiently utilize low-vanadium content and completely eliminate vanadium. The in-situ synthesis of visible light photocatalytic geopolymers from vanadium-containing solid waste not only effectively decomposes organic pollutants under visible light conditions but also effectively fixes vanadium in the vanadium-containing solid waste.

The application provides a geopolymer preparation optimization method and system based on machine learning. Applied to the field of material science and machine learning technology, the method comprises the following steps: collecting geopolymer preparation experimental data and performing pretreatment; performing nonlinear regression modeling on the geopolymer performance based on four machine learning regression algorithms to construct a geopolymer performance prediction model; calculating and assigning weights according to the mean square error of each machine learning model on the validation set to obtain a performance prediction result; receiving target performance parameters and initial raw material ratio range input by a user, performing performance prediction by using the trained geopolymer performance prediction model, and searching for an optimal ratio combination satisfying the target performance constraint through an optimization algorithm; and preparing a coal gangue-slag-fly ash geopolymer grouting material according to the optimal ratio combination. The application effectively improves the prediction accuracy and model generalization ability, and realizes intelligent recommendation and accurate performance prediction of raw material ratios.

The application provides a low-carbon slag cement and a preparation method thereof, and the low-carbon slag cement comprises the following components: 70-90 parts of mineral powder, 5-25 parts of Portland cement clinker, 5-15 parts of iron tailings, 1-5 parts of desulfurization gypsum, 0.0005-0.002 parts of a stand mill grinding aid component, 0.0005-0.002 parts of a grinding aid reinforcing component and 0.0005-0.002 parts of a dispersing component. Compared with the prior art, the application reasonably matches the types, dosages and particle sizes of the cementitious materials, optimizes the initial slurry structure, matches the hydration processes of the materials with each other, and obtains the low-carbon cement with low clinker dosage and good performance. The application stimulates the fine mineral powder particles with a small amount of clinker fine powder, avoids the problem of high water demand caused by the rapid hydration of a large amount of clinker fine particles, fully stimulates the hydration of the fine slag powder particles, and ensures the early strength of the low-carbon cement. In addition, the application reasonably utilizes a large amount of waste silica powder, slag and iron tailings, and is low-carbon and environmentally friendly.

The invention provides composite cementing material building floor sound insulation mortar and a preparation method thereof, and belongs to the technical field of novel building materials. Aiming at strong-alkalinity, high-humidity and intermittent impact coupling special environments such as hospitals and the like, a geopolymer precursor composed of metakaolin and blast furnace slag micro powder and an alkaline activator are introduced and interwoven with a cement hydration product to form an alkali-corrosion-resistant composite gel matrix; meanwhile, the composite corrosion inhibitor with the pH response release characteristic is adopted, and corrosion inhibition components are released during strong alkaline invasion to form a composite protective film; and regenerated elastic particles subjected to surface silanization treatment are selected as a damping filler. Under the synergistic effect of the three components, the mutually aggravated failure cycle of chemical erosion and mechanical impact is interrupted, so that the long-term sound insulation stability, mechanical durability and corrosion resistance of the sound insulation mortar in a severe environment are remarkably improved.