2210results about "Cement production" patented technology

The invention belongs to the technical field of building materials, and discloses a high-activity composite auxiliary cementing material based on carbonated steel slag-carbide slag as well as a preparation method and application of the high-activity composite auxiliary cementing material. The high-activity composite auxiliary cementing material is prepared from the following raw materials in parts by mass: 40 to 55 parts of carbonated steel slag-carbide slag composite micro powder, 30 to 40 parts of high titanium slag, 20 to 25 parts of metakaolin, 3 to 5 parts of ardealite, 3 to 5 parts of calcium carbonate, 3 to 5 parts of calcium carbonate and 3 to 5 parts of calcium carbonate. Wherein the carbonated steel slag-carbide slag composite micro powder is obtained by carrying out carbon sequestration reaction on steel slag and carbide slag in a solution consisting of a carbonization enhancer, an additive and water. On one hand, the CO2 storage amount of the steel slag and the carbide slag is increased, the stability and the activity are improved, on the other hand, the carbonized steel slag-carbide slag and other industrial solid waste are cooperated to achieve a composite superimposed effect, the cement mortar or the concrete can be improved in strength, stability and durability, the comprehensive performance is good, and the cost is low. And the method is green, low-carbon, energy-saving, environment-friendly and wide in popularization and application

The invention provides an iron tailing-based geopolymer electromagnetic wave attenuation performance optimization control method and system, and relates to the technical field of electromagnetic wave attenuation, and the method comprises the steps: 1, setting a synthesis condition parameter set of an iron tailing-based geopolymer in a simulation environment, comprising virtual matching of raw materials, particle size distribution, concentration gradient of an alkali activator and curing temperature-time coupling parameters, and a forming process is deduced through an amorphous phase topological configuration and a pore network evolution rule of aluminosilicate gel in a geopolymer microstructure; and step 2, constructing an interface reaction kinetics process based on the synthesis condition parameter set, and generating an enhanced interface digital mapping system with periodically arranged aluminum oxide and silicon oxide regular tetrahedrons through virtual iteration of mineral admixture ratio and forming process parameter boundary conditions. According to the method, a strengthened interface is constructed through simulation synthesis, a loss layer database is established, and microstructure regulation and control and multi-band electromagnetic wave efficient attenuation are achieved.

The invention discloses a method for preparing a solid waste cementing material from micro-carbonized steel slag, and belongs to the technical field of building materials. The preparation method comprises the following steps: carrying out crushing, iron separation and grinding treatment on steel slag particles to obtain steel slag powder; mixing the steel slag powder with water and a carbonization aid to obtain a steel slag wet mixture; feeding the wet steel slag mixture into a carbon dioxide curing kettle for curing and intensely stirring, quickly carbonizing to obtain micro-carbonized steel slag particles, and grinding and drying to obtain micro-carbonized steel slag powder; 45-70 parts of micro-carbonized steel slag, 15-35 parts of slag, 1-8 parts of gypsum, 1-8 parts of cement or clinker, 1-15 parts of fly ash or metal tailings, 1-10 parts of an alkaline solution and 25-30 parts of water are mixed to obtain the micro-carbonized steel slag solid waste cementing material. The micro-carbonized solid waste steel slag cementing material prepared by the invention has the advantages of low cost, simple preparation process and equipment, better early and later mechanical properties, good stability, low carbon, high additional value and the like.

The invention provides a method for predicting reaction activity of a geopolymer precursor material, which comprises the following steps: S1, weighing the geopolymer precursor material A, and mixing with a NaOH solution; s2, heating and stirring the mixed solution in the S1, and reacting to obtain a composite solution; s3, carrying out suction filtration on the composite solution; drying and weighing filter residues obtained by suction filtration; s4, measuring the ion concentration in the filtrate obtained by suction filtration in S3; s5, calculating the dissolution rate of the A by using the mass of the A and the mass of the filter residues; s6, testing the actual activity index of the geopolymer precursor material A; s7, obtaining a calculation formula of the predicted activity index of A by using the dissolution rate and the ion concentration; and S8, solving a calculation formula of the actual activity index in S6 and the predicted activity index in S7 to obtain a calculation model of the predicted activity index of A. The problems that in the prior art, geopolymer precursor material reaction activity prediction is time-consuming and labor-consuming, not suitable for all environments and large in error are solved.

The invention discloses a sulfuric acid erosion resistant self-repairing geopolymer system and a self-repairing method thereof, and relates to the technical field of composite materials and artificial intelligence. At least one self-repairing unit optimized for sulfuric acid erosion embedded within the geopolymer matrix; the in-situ multipoint pH sensing network is integrated in the geopolymer matrix and is used for monitoring spatio-temporal evolution data of a pH field in a sulfuric acid erosion process in real time; the edge calculation module is used for identifying a preliminary erosion indication according to the received spatio-temporal evolution data of the pH field; and the central AI decision module is used for evaluating an erosion state and predicting a development trend by utilizing an AI model optimized aiming at sulfuric acid erosion according to the identified preliminary erosion indication and the pH field spatio-temporal evolution data, and generating an optimal repair strategy to control the self-repair unit to perform self-repair. According to the invention, intelligent, active and refined protection and life management of the geopolymer in the sulfuric acid erosion process can be realized.

The present invention belongs to the field of resource utilization of building materials and solid waste, and relates to a red-mud-based cementing material based on efficient drying, component homogenization and activity improvement, and a preparation method therefor. The preparation method comprises: adding a filter aid to red mud to carry out sedimentation, then subjecting same to filter pressing until the water content is 14-16%, then drying the solid material, which has been subjected to filter pressing, until the water content is 4% or below, and finally grinding same to obtain the product. The filter aid comprises the following raw materials: 10-30 parts of polyaluminum chloride, 5-15 parts of polyaluminum sulfate, 1000-1200 parts of blast furnace slag or fly ash, 700-900 parts of steel slag, 400-600 parts of carbide slag or alkaline residues, and 300-400 parts of desulfurized gypsum or phosphogypsum or fluorgypsum. By means of the present invention, the dehydration efficiency of red mud can be improved, the red-mud-based cementing material can also be prepared in one step; the preparation process for the red-mud-based cementing material is simplified; and the prepared red-mud-based cementing material has the advantages of a high mechanical strength, high durability and erosion resistance.

The invention relates to a geopolymer-based non-expansive building fireproof coating, and belongs to the field of building materials. A geopolymer prepared from fly ash, granulated blast furnace slag, coal gangue, oil shale waste residues and sodium silicate water glass is used as a binder, and expanded perlite is used as a heat insulation filler to prepare the inorganic building fireproof coating. Meanwhile, tailings and basalt fibers are added, so that the contractibility and integrity of the geopolymer-based fireproof coating are improved. Compared with an organic fireproof coating, the environment-friendly fireproof coating has high environment friendliness in the production and preparation process and the use and action process in the case of a fire disaster. Compared with a traditional Portland cement-based fireproof coating, the fireproof coating has more excellent performance in the aspects of high temperature resistance, corrosion resistance and the like. According to the invention, the way of resource utilization of solid wastes is widened, and the building fireproof coating with excellent performance is provided.

The invention discloses a self-sensing geopolymer composite material, and belongs to the technical field of intelligent cement base material preparation. The raw materials comprise an alkaline exciting agent, standard sand, iron tailing sand, a silicon-aluminum mineral cementing material, short carbon fibers, water, a water reducing agent and a dispersing agent. The self-sensing geopolymer composite material has multiple conductive phases which can generate a composite effect which is not possessed by a single conductive phase when being used together, multiple conductive channels can generate a synergistic or multi-scale effect (long and short range synergistic conduction), the sensing stability (repeatability) is good, the noise is low, and the self-sensing geopolymer composite material has good application prospects. The requirement for the carbon fiber mixing amount when the conductive seepage threshold value is reached and the threshold value are optimized to a certain degree, and the cost can be saved. When the device is applied to tunnel engineering reinforcement of lining segments and sprayed concrete, a tunnel supporting effect can be achieved, damage of a tunnel structure can be sensed, sensing performance is achieved without additional sensing materials / devices, nondestructive testing of the structure is achieved, and therefore the safety of the structure is improved, and the service life of the structure is prolonged.

The invention relates to the technical field of geopolymers, and particularly discloses a PVA fiber toughened geopolymer and a preparation method thereof. Comprising the following steps: mixing fly ash, slag, coarse aggregate and fine aggregate for 1-2min, adding an alkali-activated liquid, stirring for 1-2min, adding a PVA fiber composition, and mixing for 1-2min to obtain a PVA fiber toughened geopolymer; the addition amount of the PVA fiber composition is 2-3.5% of the mass of the PVA fiber toughened geopolymer; the doping amount of the fly ash in the PVA fiber toughened geopolymer is 550-580kg / m < 3 >, and the mass ratio of the fly ash to the slag is 1: (1-1.5); the mixing amount of the fine aggregate in the PVA fiber toughened geopolymer is 650-710kg / m < 3 >, and the mixing amount of the coarse aggregate in the PVA fiber toughened geopolymer is 690-750kg / m < 3 >.

The invention provides a geopolymer preparation and optimization method and system based on machine learning. The method is applied to the technical field of material science and machine learning. The method comprises the following steps: acquiring geopolymer preparation experimental data and preprocessing the data; performing nonlinear regression modeling on the geopolymer performance based on four machine learning regression algorithms, and constructing a geopolymer performance prediction model; calculating and distributing weights according to the mean square error of each machine learning model on the verification set, and performing weighted fusion to obtain a performance prediction result; receiving target performance parameters input by a user and an initial raw material ratio range, performing performance prediction by using the trained geopolymer performance prediction model, and reversely searching an optimal ratio combination meeting target performance constraints through an optimization algorithm; and preparing a geopolymer according to the optimal ratio combination to prepare the coal gangue-slag-fly ash geopolymer grouting material. According to the method, the prediction precision and the model generalization ability are effectively improved, and intelligent recommendation and accurate performance prediction of the raw material ratio are realized.

The invention discloses a low-carbon cement calcining process using carbide slag to replace limestone clinker, and relates to the technical field of low-carbon calcined cement processing. A treatment table, a step-by-step crushing mechanism, a screening reflux mechanism, a self-turning drying mechanism and a linkage driving mechanism are matched to complete low-carbon cement calcination by using the carbide slag to replace limestone clinker, and the step-by-step crushing mechanism for performing multi-stage crushing on the waste carbide slag to gradually reduce the particle size is mounted on the upper end surface of the treatment table; according to the calcium carbide slag crushing and drying device, seamless connection of crushing and drying of calcium carbide slag is achieved through combination of the step-by-step crushing mechanism and the self-overturning drying mechanism, the processing speed is increased, dust is reduced, and the crushing and drying efficiency is improved. By means of the combination of the first-stage crushing assembly and the second-stage crushing assembly and staggered rubbing of the trapezoidal crushing plate and the crushed plate, complex stress is applied, the stress direction is increased, hard particles are effectively treated, and the uniformity of carbide slag is ensured.

The invention discloses a solid waste-based cementitious material, which comprises the following raw materials based on 100% of the total mass percentage: 10% to 35% of pretreated pyrite tailing powder, 30% to 50% of granulated blast furnace slag powder, 15% to 30% of steel slag powder, and the remainder being gypsum powder. The invention heats the pyrite tailing at 300°C and ultrafinely grinds the pyrite tailing to cause an oxidation reaction of pyrite and pyrrhotite contained therein to generate sulfate minerals, thereby reducing the proportion of sulfide compounds in the tailing and reducing the risk of expansion and cracking of a hardened body of the solid waste-based cementitious material in the later stage. Moreover, the sulfate generated by oxidation and the gypsum contained in the pyrite tailing react with the steel slag and slag in the solid waste-based cementitious material to generate hydrated calcium silicate gel and calcium sulfonite, thereby improving the strength of the solid waste-based cementitious material.

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 relates to hybrid fiber reinforced ultrahigh-performance geopolymer concrete as well as a preparation method and application thereof. Slag, metakaolin and silica fume are used as precursor materials of geopolymer concrete, a sodium hydroxide-water glass solution is adopted to compound an alkali activator, and steel fibers, polyvinyl alcohol fibers and modified glass chopped fibers of different sizes are mixed and doped, so that the brittleness of the geopolymer concrete is remarkably improved, and the service life of the geopolymer concrete is prolonged. The early strength and the high temperature resistance are improved. The hybrid fiber reinforced ultrahigh-performance geopolymer concrete has the characteristics of low carbon emission, ultrahigh strength, high temperature resistance, high durability and the like, and can meet the use of the geopolymer concrete in actual engineering. According to the ultrahigh-performance geopolymer concrete, solid waste resources are utilized at the same time, carbon emission in the concrete production process is reduced, and the ultrahigh-performance geopolymer concrete is environmentally friendly, low in carbon, ultrahigh in strength, easy to prepare and capable of being suitable for complex environmental engineering structures such as tunnels, bridges and high-rise buildings.

The invention belongs to the technical field of civil engineering materials, and particularly relates to a coal gangue-based solid waste cementing material as well as a preparation method and application thereof. The coal gangue-based solid waste cementing material is prepared from the following raw materials in percentage by mass: 60-80% of activated coal gangue powder, 5-20% of an exciting agent, 5-15% of superfine slag powder, 2-5% of silica fume, 1-3% of gypsum and 1-3% of fan blade short fibers. According to the invention, solid waste resources (coal gangue and superfine slag powder) are recycled, and on the basis of consumption of the solid waste resources, the coal gangue-based solid waste cementing material obtained by using the solid waste resources has good mechanical properties and durability, and can meet the use requirements of highway engineering base layers.

The invention discloses a layered pore structure geopolymer based on combination of multi-stage low-temperature in-situ polymerization and an ice template method and a preparation method of the layered pore structure geopolymer. The preparation method comprises the following steps: preparing geopolymer slurry; performing one-way freezing on the slurry to form a frozen green body containing a directionally arranged ice crystal template; before the frozen green body is subjected to freeze drying to remove an ice crystal template, specific multi-stage low-temperature in-situ polymerization treatment is carried out, and the treatment comprises at least two different low-temperature heat preservation stages which are sequentially carried out within the temperature range of-10 DEG C to + 5 DEG C, and the temperature of the low-temperature heat preservation stages is gradually increased; and then the treated green body is subjected to freeze drying and maintenance. According to the method, the multi-stage low-temperature in-situ polymerization step aiming at the reaction characteristics of the geopolymer is introduced before the ice crystal template is removed, so that the problems of low mechanical property and unstable pore structure of the geopolymer prepared by a traditional ice template method are solved, and the mechanical strength and structural integrity of the product are remarkably improved; meanwhile, a good layered pore structure and pore channel connectivity are kept.

The invention discloses a water-permeable concrete brick loaded with a metal-organic framework material and a preparation method of the water-permeable concrete brick. The method comprises the following steps: mixing a silicon-aluminum material and an alkali activator to prepare geopolymer slurry, adding an organic amine reagent, mixing, and uniformly stirring to obtain modified geopolymer slurry; aggregate is added into the modified geopolymer slurry, the mixture is uniformly stirred and then loaded into a test mold, the test mold is demolded after standing for 1-2 days, a geopolymer water-permeable concrete brick is obtained, a metal salt solution is uniformly sprayed to the geopolymer water-permeable concrete brick, and the geopolymer water-permeable concrete brick is taken out after being subjected to steam curing for 3-5 h; and uniformly spraying the organic ligand solution on the cured geopolymer water-permeable concrete brick, performing steam curing for 18-22 hours, taking out the geopolymer water-permeable concrete brick after curing, and drying the geopolymer water-permeable concrete brick in a drying oven at 80-120 DEG C for 20-30 hours to obtain the water-permeable concrete brick loaded with the metal-organic framework material. The pervious concrete brick prepared by the invention has better adsorption efficiency, and can play an excellent water purification function in practical application.

The invention discloses an anti-condensation device of a powder grinding and selecting machine for cement processing, and belongs to the technical field of cement processing devices. A powder grinding and selecting machine anti-condensation device for cement processing comprises an air bellow, a crushing box communicated with the air bellow is fixedly installed on the surface of the top end of the air bellow, a powder grinding and selecting box communicated with the crushing box is fixedly installed on the surface of the top end of the crushing box, a circular truncated cone column is fixedly installed in the powder grinding and selecting box, and a lower disc is fixedly installed on the surface of the circular truncated cone column. An upper disc sealed with the inner wall of the powder grinding and selecting box is fixedly mounted above the lower disc; and a plurality of rotatable outer air guide blades are arranged between the lower disc and the upper disc. Compared with a traditional fixed blade, the anti-condensation device of the powder grinding and selecting machine for cement processing has the advantages that the adjustable air guide blade enables air flow to flow evenly, powder selecting efficiency is improved, backflow of cement fine powder materials is avoided, abrasion to the inner air guide blade and the outer air guide blade is reduced, the service life of the air guide blade is prolonged, and the service life of the powder grinding and selecting machine is prolonged. And the noise is reduced due to uniform airflow flowing.

The invention relates to the technical field of resources and environments, in particular to an industrial solid waste treatment method, a cementing material and a workpiece. The industrial solid waste treatment method comprises the following steps: providing nitrogen-doped biochar, wherein at least the surface of the nitrogen-doped biochar is combined with a nitrogen-containing group; industrial solid waste is provided, wherein the industrial solid waste contains heavy metal ions; the nitrogen-doped biochar and industrial solid waste are subjected to first mixing treatment, a gel material precursor is obtained, the gel material precursor can be further prepared into a gel material, and a workpiece is prepared. Heavy metal ions can be adsorbed and fixed by the nitrogen-doped biochar and are not easy to dissolve out to harm the environment, after adsorption, the mechanical property of a workpiece prepared from the cementing material is also improved, and meanwhile, the cementing material is endowed with a carbon sequestration effect. By means of the treatment method, the industrial solid waste containing the heavy metal ions can be recycled, the treatment method is controllable in process, and the prepared cementing material is excellent in performance.

The invention provides an all-solid waste geopolymer grouting material and a preparation method thereof, and relates to the technical field of solid waste resource utilization and geopolymer grouting material preparation. The all-solid waste geopolymer grouting material comprises the following raw materials in parts by weight: 100-200 parts of an all-solid waste mixture, 40-50 parts of an alkaline activator, 0.1-0.5 part of an early strength agent, 0.5-1 part of a water reducing agent, 3-7 parts of a modifier and 70-90 parts of water, the all-solid waste material comprises slag powder, steel slag powder, phosphogypsum and fly ash; the modifying agent is prepared from aluminum dihydrogen phosphate, vinyl triacetoxysilane and ethylenediamine terminated polyethyleneimine. The all-solid waste geopolymer grouting material provided by the invention has the characteristics of good working performance, high early strength, micro-expansibility and the like.

The invention discloses a mine filling cementing material and a preparation method thereof. The mine filling cementing material comprises the following components in percentage by mass: 3-8 wt% of high belite sulphoaluminate cement clinker; 1-3 wt% of high free calcium silicate cement clinker; 74 to 85 wt% of granulated blast furnace slag powder or granulated blast furnace slag; and 10 to 18 wt% of gypsum. Compared with other paste filling materials with the same strength, the cementing material solves the problems that in the prior art, a mine filling cementing material is poor in excitation effect and poor in mechanical property, so that the mine filling effect is affected, and the cost is high due to the fact that the using amount of the cementing material is large, and meanwhile the using proportion is reduced; and the use of mine backfill engineering is fully met.

The invention relates to the technical field of solid waste treatment and recycling, and discloses a waste incineration fly ash geopolymer composite material and a preparation method thereof, and the composite material is prepared from waste incineration fly ash, apatite minerals, zero-valent iron powder, persulfate and an alkali activator. The preparation method comprises the following steps: mixing the waste incineration fly ash, apatite minerals, zero-valent iron powder and persulfate to obtain composite powder; performing frequency conversion mechanochemical synergistic activation on the composite powder, wherein the activation process comprises a low-temperature activation stage and a high-energy pulse activation stage; and finally, mixing the activated powder with an alkali activator, pouring, molding and curing. According to the method, the reduction reaction and the oxidation reaction are driven step by step in the same system by regulating and controlling the mechanical energy input time sequence, the compatibility problem of a reducing agent and an oxidizing agent is solved, different types of persistent organic pollutants are synergistically degraded, meanwhile, heavy metal is stabilized, and the treatment effect is good. And the fly ash is recycled to prepare a geopolymer material with mechanical properties.

A free-flowing solid activator for a geopolymer mortar or concrete comprises or consists of an alkali(ne) metal carbonate surface treated with a sub-stoichiometric amount of alkali(ne) metal hydroxide. In one embodiment a method for producing an activated fly ash comprises: a) spraying an aqueous alkali(ne) metal silicate onto the surface of a solid particulate fly ash; b) drying the spray-treated product of step a); c) optionally grinding the dried product of step b); and optionally, repeating the spray treatment process for the product of step b) or step c) by returning the product of step b) or step c) to step a).

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 relates to the technical field of 3D printing building materials, in particular to a 3D printing geopolymer composite material with low drying shrinkage and a preparation method thereof.The 3D printing geopolymer composite material is prepared from, by mass, 400 parts of slag powder, 320 parts of fly ash, 80 parts of steel slag micro powder, 1200 parts of quartz sand, 5.1-25.6 parts of sodium hydroxide, 46.4-66.9 parts of sodium silicate, 8 parts of barium chloride and 296 parts of water. The preparation method comprises the following steps: fully mixing the slag powder, the fly ash, the steel slag micro-powder and the quartz sand according to a preset mass ratio to obtain a uniform basic powder mixture; adding an alkali activator and barium chloride into the basic powder mixture, and continuously mixing until the mixture is uniform to obtain a first mixture; and adding water into the first mixture according to a preset water-binder ratio, and carrying out stirring treatment according to a preset stirring method to obtain the 3D printing geopolymer composite material with low drying shrinkage. According to the invention, the drying shrinkage can be reduced.

The invention discloses carbonized and activated steel slag, a preparation method and application of the carbonized and activated steel slag in preparation of cement clinker. The preparation method of the carbonized and activated steel slag comprises the following steps: activating steel slag by adopting an activating solution, adjusting the pH value to 7-8 after first stirring, and then performing second stirring, filtering, washing, drying, grinding and sieving to obtain the activated steel slag, and carbonizing the activated steel slag to obtain carbonized activated steel slag. The steel slag is subjected to chemical treatment and CO2 curing synergistic treatment, so that the existence form of CaO in the steel slag is changed into a unit from multiple elements, the existence form of CaO is optimized, the complex chemical composition of the steel slag is simplified, and the steel slag replaces limestone to serve as a raw material for calcining the cement clinker, so that the utilization rate of the limestone is reduced, and the utilization rate of the steel slag in the field of building materials is increased; the performance of the cement is also effectively improved.

The invention provides a novel concrete column fiber geopolymer formwork structure and a fixing method, and relates to the technical field of building structures. Comprising a fiber geopolymer template, a polyimide tenon structure is arranged on one side of the fiber geopolymer template, and a polyimide mortise structure is arranged on the other opposite side of the fiber geopolymer template; the polyimide tenon structure is suitable for being connected with the polyimide mortise structure of another fiber geopolymer template in a matched mode to form a mortise and tenon connection structure. The inner sides, close to the polyimide tenon structure and the polyimide mortise structure, of the fiber geopolymer template are each provided with a protection supporting plate connected to the surface of the fiber geopolymer template, and the two protection supporting plates are suitable for being connected in an abutting mode to form a protection baffle of the mortise and tenon connection structure. By means of the scheme, construction and installation of the building formwork are facilitated.

A method for preparing a construction material for a roadbed and a pavement by using construction solid waste-based geopolymers includes: preparing a construction solid waste-based geopolymer cementitious material and construction solid waste-based recycled sand by using construction solid wastes, and then preparing the construction material by batching, stirring, molding, and curing the cementitious material and the recycled sand with aggregates and water. Barium hydroxide is determined as a main activator and a high-pressure activation is performed, thereby promoting a dissolution efficiency of active silicon and aluminum in the construction solid wastes; and a compensator is added to promote polymerization to obtain the cementitious material with a compact three-dimensional network structure. The recycled sand is also obtained, and the construction material is obtained by using the recycled sand and the cementitious material, thereby fully utilizing the construction solid wastes and improving preparation efficiency of the construction material.

The invention provides an alkali-activated solid waste-based cementing material as well as a preparation method and application thereof, and relates to the technical field of building materials. The alkali-activated solid waste-based cementing material provided by the invention is prepared from the following components in percentage by mass: 50 to 75 percent of fly ash, 15 to 30 percent of mineral powder, 5 to 10 percent of cement, 2 to 8 percent of phosphogypsum, 0.5 to 3.5 percent of composite exciting agent and 0.01 to 0.07 percent of reinforcing additive. The cement, the industrial solid waste fly ash, the mineral powder and the ardealite are taken as main raw materials, so that the low-cost and environment-friendly effects are achieved, and meanwhile, the resource utilization rate of the industrial solid waste is increased. The fly ash and the mineral powder have potential hydration activity and have gelling property and curing property; the ardealite has the effects of adjusting the setting time and the early expansion rate, and the reinforcing admixture has the effects of retaining water, reducing water and reducing pores, so that the early shrinkage and strength of the alkali-activated solid waste-based cementing material can be effectively controlled.

The invention discloses a composite system geopolymer grouting material and a preparation method thereof. The composite system geopolymer grouting material comprises the following raw materials in percentage by mass: 50-70% of coal gangue, 10-30% of fly ash and 10-30% of cement. Functional additives: 5%-20% of desulfurized gypsum and 5%-15% of bentonite; the composite exciting agent is formed by compounding carbide slag and sodium silicate according to the mass ratio of 1: 1-1: 2. The geopolymer is excellent in mechanical property, meets engineering requirements, is remarkable in environmental protection benefit, conforms to double-carbon target low-carbon process innovation: a calcination-free process: traditional high-temperature calcination is abandoned (the temperature needs to be 550-900 DEG C), carbon emission is reduced by more than 30% (compared with a contrast, the carbon emission of a traditional process is increased by 35%), and the geopolymer conforms to the green positioning of low energy consumption and low three wastes of geopolymers. The cost advantage is prominent, the economic value is remarkable, the raw material cost is reduced, specifically, the coal gangue (low-cost solid waste) is used for replacing 30%-50% of cement, and the comprehensive raw material cost is reduced by 40% (compared with a traditional cement-based grouting material).