57 results about "Green materials" patented technology

The invention discloses a permeable laminated grid ecological bank protection material suitable for improvement of a dredged soil green material and a preparation method of the permeable laminated grid ecological bank protection material. The preparation method comprises the following steps that S1, a dredged soil green improver and dredged soil are evenly mixed in a dry mode, and homogeneous slurry is formed after stirring; s2, injecting the homogenized slurry into a mold, and pressing the homogenized slurry into hollow laminated grid units through a hydraulic forming machine; and S3, the permeable laminated grid units are naturally cured, and the permeable laminated grid ecological bank protection material suitable for improvement of the dredged soil green materials is formed. According to the invention, the dredged soil is taken as a matrix, and the mechanical property and ecological compatibility of the dredged soil are remarkably improved by adding the composite modifier composed of 11 components such as the steel slag micro powder, the red mud activator, the calcium sulphoaluminate expanding agent and the active magnesium oxide and combining the design of the three-layer permeable laminated grid structure.

The invention discloses a cement enterprise carbon management system and method, and particularly relates to the technical field of cement carbon management, and the system comprises an intelligent carbon closed-loop management module which is used for achieving the whole-process monitoring, management and closed-loop control of enterprise carbon emission through the advanced data tracking and optimization technology. According to the invention, end-to-end carbon footprint tracing is carried out by using the block chain and the Internet of Things equipment, production parameters are dynamically adjusted through real-time data acquisition and an AI algorithm, dynamic balance of carbon emission is maintained, meanwhile, a digital twinborn model and multi-dimensional carbon accounting analysis help an enterprise to accurately make a carbon treatment decision, and the carbon treatment efficiency is improved. The intelligent carbon compensation module ensures the realization of a zero carbon emission target, the leading edge low-carbon technology integration module promotes green transformation of a production process through carbon capture conversion, green material research and development and renewable energy source integration, and the intelligent operation optimization module promotes the green transformation of the production process through optimization of production scheduling, predictive maintenance and supply chain carbon management. And the energy consumption and the carbon emission are obviously reduced.

The invention belongs to the field of industrial waste treatment and comprehensive utilization, and provides a method and a process for preparing a heavy metal polluted acidic wastewater purifying agent by coupling red mud with carbide slag, and the process comprises the following steps: S1, raw material pretreatment: respectively drying original red mud and carbide slag at 105 + / -5 DEG C to constant weight, crushing, and sieving with a 100-mesh sieve; s2, mixing: uniformly premixing the red mud and the carbide slag powder in proportion, mixing the mixture with a binder in proportion, and uniformly stirring; s3, activating: slowly spraying a proper amount of water into the uniformly mixed dry powder, and stirring while adding until the material forms a wet block mass with certain plasticity; s4, granulation: feeding the wet material into a granulator with the granulation particle size of 2-5 mm, and aging the raw material particles at room temperature for 12-24 hours; and S5, drying and activating: drying the aged particles at 105-120 DEG C until the weight is constant, cooling to room temperature, and sieving to obtain the purifying agent product. The method has the effects of being high in heavy metal removal rate, stable, safe and efficient.

The invention relates to a method for preparing a PLA / PPC biodegradable composite material by reactive compatibilization, and belongs to a biodegradable material preparation method, and the method comprises the following steps: carrying out maleic anhydride end-capping modification on PPC; (PLA, modified PPC and an additive are subjected to melt blending. A test proves that the interface compatibility is obviously improved; in the aspect of mechanical properties, the elongation at break reaches 252.8% (improved by 7.0 times compared with that of a non-compatibilization system), the notch impact strength reaches 6.32 kJ / m < 2 > (improved by 2.0 times), and meanwhile, the tensile strength is kept at 54.8 MPa or above. In addition, the light transmittance of the material is improved to 93.0%, the water contact angle reaches 85.71 degrees, meanwhile, the thermal stability is synchronously improved, T95% is greatly improved to 339.62 DEG C from 319.27 DEG C, and the amplification reaches 20.35 DEG C. The high-performance full-biodegradable material has wide application prospects in the fields of packaging films, environment-friendly agricultural films and the like, and a solution is provided for industrial application of green materials.

The invention belongs to the field of building materials, and particularly relates to a Cu modified low-calcium carbon sequestration cementing material and a preparation method thereof. The raw materials of the material comprise a mixture of calcium carbonate, silicon dioxide and aluminum oxide and a Cu-containing modifier, the preparation method comprises the following steps: 1, mixing a mixture containing calcium carbonate, silicon dioxide and aluminum oxide with a Cu-containing modifier to obtain a mixed raw material; and 2, adding water into the mixed raw material obtained in the step 1, mixing, pressing into a cake-shaped wet blank, drying and multi-stage calcining the cake-shaped wet blank, quickly cooling to room temperature, and grinding into powder to obtain the Cu modified low-calcium carbon sequestration cementing material. According to the material, the hardening performance of LCCB is improved by doping Cu, copper ions enter crystals in a solid solution form, the leaching risk is small, and high environmental friendliness is achieved; according to the preparation method, the calcination temperature is lower than that of traditional cement, and the energy consumption and the production cost are reduced.

The invention relates to a static sintering method and system for preparing aluminum hydroxide by extracting an aluminum element from fly ash, and the static sintering method comprises the following steps: firstly, taking a raw material which is crushed to a process control fineness as a pre-powder material, carrying out raw material preparation and blank forming on the pre-powder material to obtain a blank, sintering the blank to obtain a clinker, and sintering the clinker to obtain the aluminum hydroxide. The clinker is dissolved out to obtain slurry, and then the slurry is subjected to slurry desilicication, carbon component reaction, hydrogen-aluminum separation and drying to prepare high-whiteness and high-purity aluminum hydroxide; wherein the raw materials comprise fly ash; the blanks are sintered into polygon prism-shaped blanks, the polygon prism-shaped blanks are stacked on a high-temperature-resistant kiln car in an industrial tunnel kiln, the blanks are roasted in the industrial tunnel kiln, and the roasting temperature ranges from 800 DEG C to 1100 DEG C. According to the invention, solid wastes such as fly ash, coal gangue, carbide slag and the like, pulverized coal and sodium carbonate are crushed into materials with the same fineness, high-whiteness and high-purity aluminum hydroxide can be obtained through an alkaline static sintering process, the recovery rate of aluminum in the solid wastes is about 90%, and harmless, resource and synergistic utilization of the solid wastes such as fly ash and the like is realized.

The utility model relates to the technical field of pottery, and provides a pottery green material picker which comprises a bottom plate, the four corners of the top of the bottom plate are all fixedly connected with barrels, the interiors of the four barrels are all slidably connected with sliding columns, the tops of the four sliding columns are fixedly connected with a frame body, the middle position of the frame body is fixedly connected with a plate body, and the plate body is fixedly connected with the bottom plate. Filter screens are fixedly connected to the two sides of the interior of the frame body, clamping plates are fixedly connected to the two sides of the top of the bottom plate, a first motor is fixedly connected to one side of the exterior of one clamping plate, a rotating rod is fixedly connected to the first motor through an output shaft, a cam strip is fixedly connected to the exterior of the rotating rod, and a second motor is fixedly connected to one side of the top of the frame body. The second motor is fixedly connected with a reciprocating lead screw through an output shaft, a bearing seat is arranged outside the reciprocating lead screw, and the bearing seat is connected with the reciprocating lead screw through a ball nut pair. By means of the technical scheme, the problem that in the prior art, powder cannot be efficiently treated conveniently, and the working efficiency is not improved is solved.

The present invention discloses a method for preparing a starch-based 3D printing ink suitable for high printability, and belongs to the technical field of green printing materials. The present invention selects natural starch as raw material, and modifies the starch by methacrylic anhydride. The modified methacrylated starch can undergo self-crosslinking under ultraviolet light to form a network structure, and then compounded with natural starch and high-amylose starch to prepare a starch-based 3D printing ink with high printability. The ink has the characteristics of controllable photosensitivity, easy extrusion, and high formability, can be printed with high precision, is biodegradable, and uses non-toxic and pollution-free crosslinking agents and adhesives in the preparation process. It is a green material and can be safely used in biological tissue engineering. The present invention uses 3D printing technology, and can print the shape and size of printed products according to needs, which is convenient for personalized production. The printed products have high mechanical strength, high porosity and high biological stability, and have high application prospects.

The invention provides digital jet printing ink for a degradable fiber material and a preparation method thereof, and relates to the technical field of digital jet printing ink, the digital jet printing ink comprises a disperse dye compound, a composite additive system and water; the compound additive system comprises at least one of a dispersing agent, a humectant and a wetting agent; the disperse dye compound is selected from specific disperse dye compounds with moderate molecular weight and strong low-temperature mobility. The digital jet printing ink is specially used for jet printing of degradable fiber materials, can fix color at the low temperature of 150-160 DEG C or below, has excellent color expression, fastness and environmental protection characteristics, and is very suitable for digital jet printing of green materials.

The application provides a brand-new epoxy-based glass polymer material modified by siloxane and a preparation method, wherein vanillin is used to react with different diamine compounds to prepare a vanillyl diphenol compound, the diphenol compound is used to react with different epoxies to obtain a vanillyl epoxy compound, 3-aminopropyl triethoxysiloxane is introduced for crosslinking and solidification on the basis, an epoxy-based glass polymer material is prepared through a gradient temperature solidification method, and a large number of dynamic imine bonds and siloxane bonds in the material can enhance the mechanical properties, thermal stability and creep resistance of the epoxy-based glass polymer material. In addition, in the design of the application, experimental raw materials are green and environmentally friendly, the epoxy-based glass polymer material has excellent mechanical properties, thermal stability and creep resistance, is an excellent option for preparing green materials, and provides a train of thought for preparing the epoxy-based glass polymer material by using a green method.

The utility model discloses a kind of green material automatic powder burying devices for special ceramic production, belong to the field of ceramic production.A kind of green material automatic powder burying devices for special ceramic production, including front and rear through work tank, transmission assembly is provided in work tank along passageway length direction, and the side wall of work tank is provided with spray head, crushing cylinder, and the cavity of work tank is communicated by guide channel, and at least one group of crushing rollers is provided in crushing cylinder, the axis of each group of crushing roller is triangularly arranged, and collision gap is formed between crushing roller and crushing cylinder;Storage box is fixedly connected with crushing cylinder by conveying component, and the cavity of storage box is communicated with spray head by conveying mechanism;The utility model effectively crushes the hard agglomerate powder formed under the vibration effect of conveying belt, avoids excessive powder jam, and improves the quality of recycled powder.

The present application relates to ceramic production equipment technical field, disclose a kind of special ceramic forming drying device with batch control, including drying furnace body and protective cabin cover;Rotary transport mechanism is sequentially provided with several layers of independent operation transport tracks from top to bottom, each transport track can transport several green material pallets.The present application in each independent operation transport track, according to the water content of the ceramic embryo to be dried transported differently, adjust the residence time of the green material pallet transported in low temperature zone, medium temperature zone and high temperature zone, so that the different batches of ceramic embryo to be dried can be controlled separately, can effectively control the drying time according to the water content of the different batches of ceramic embryo to be dried, can fully guarantee the drying effect of the different batches of ceramic embryo to be dried.

The invention provides a method for manufacturing an aluminum oxide insulator resistant to 300kV direct-current voltage. The method comprises the following steps: step S1, performing isostatic pressing to form a cylindrical ceramic green body; s2, processing the shape of the green material, and turning an umbrella skirt; s3, sintering the processed green body material into ceramic to form a cooked body; s4, the size of the cooked blank is subjected to finish machining, upper and lower connecting end faces and hole sites are machined, and a ceramic insulation column is formed; s5, a metal top plate and a metal bottom corner are machined; s6, a metal top plate and a metal bottom corner are assembled at the upper end and the lower end of the ceramic insulation column respectively; and S7, spraying an insulating layer on the surface of the ceramic insulating column. By adopting the ceramic green body made of high-purity aluminum oxide, the whole ceramic insulation column is integrally sintered and formed, the bearing effect is better, the insulation performance is better, the total height design size is reduced, the bearing requirement is met, and meanwhile the machining and assembling cost is saved.

The invention belongs to the technical field of preparation of green materials, and particularly relates to polymethoxylated flavone co-hybridized hydromagnesite composite powder, a preparation method thereof and application of the polymethoxylated flavone co-hybridized hydromagnesite composite powder in natural rubber master batches. The polymethoxylated flavone co-hybridized hydromagnesite composite powder provided by the invention comprises hydromagnesite, a glycine derivative coated on the surface of the hydromagnesite, and polymethoxylated flavone coated on the surface of the glycine derivative, the hydromagnesite and the glycine derivative are connected through an ester bond, and the polymethoxylated flavone and the glycine derivative are connected through electrostatic adsorption. The polymethoxylated flavone co-hybridized hydromagnesite composite powder provided by the invention not only has better particle size distribution, structural stability, low oil absorption value, low surface polarity and difficulty in agglomeration, but also has high dispersity in rubber, and a composite material prepared from the polymethoxylated flavone co-hybridized hydromagnesite composite powder and the rubber has high mechanical properties and can achieve internal and external synergistic flame retardance and smoke suppression.

The invention discloses a low-carbon halogen-fire-free safe polyolefin material and a preparation method thereof, and belongs to the technical field of new energy fireproof safe materials, and the low-carbon halogen-fire-free safe polyolefin material comprises polyolefin resin, a compatilizer, surface modified silicate powder, a fluxing agent, a flame retardant, an antioxidant and a surface modified biomass material. The polyolefin surface modified material provided by the invention is free of halogen and heavy metal in the whole course, meets the standard of green materials, is harmless to the environment and human bodies, has the characteristics of safety, environmental protection, flame retardance and fire prevention, can resist flame in the initial stage in a combustion environment, can form a ceramic shell layer on the outer layer of the material in continuous flame ablation, plays a role in fire prevention, and has a good application prospect. The metal ions loaded on the surface of the silicate powder can be catalyzed into carbon through the metal ions to further cooperate with the silicate powder to improve the flame retardant property of the material; the flame-retardant component grafted or coated on the surface of the biomass material can further improve the continuous flame-retardant property of the material on the basis of improving the dispersing property of the biomass material.

This invention relates to the field of green materials engineering technology, and discloses a low-VOC environmentally friendly pressure-sensitive adhesive for vehicle body stickers and its preparation method. The adhesive comprises deionized water, enzymatically hydrolyzed sodium lignin sulfonate powder, hydrogenated rosin glycerol ester, oxidized starch aqueous solution, ammonia, glucono-δ-lactone powder, and zirconium carbonate ammonium solution. During preparation, a microemulsion is formed by dispersing hydrogenated rosin glycerol ester using the amphiphilic properties of lignin under a shear field. After mixing with oxidized starch, latent acid, ammonia, and a crosslinking agent are added under laminar flow conditions. This invention utilizes the physicochemical coupling mechanism of ammonia volatilization and the thermal release of acid from glucono-δ-lactone to achieve synchronous homogeneous crosslinking at a thick coating depth, solving the problem of cohesive gradient defects. Simultaneously, it utilizes high-valence zirconium ions to construct a dynamic reversible coordination dissipation network, effectively dissipating peel tensile stress, avoiding cohesive-destructive residues, and eliminating the risk of VOCs and interfacial pinholes caused by small-molecule emulsifier residues, significantly improving heat resistance and tack performance.

The invention discloses a full-biodegradable starch foaming formula and a preparation method, and relates to the technical field of foaming materials.The full-biodegradable starch foaming formula is prepared through collaborative design of composite modified starch, enzymolysis fibers, a nano reinforcing agent and a composite foaming agent in combination with a microwave-assisted gradient hot press molding process. And complete biodegradability and function integration of the material in a normal-temperature natural environment are realized. The product has high mechanical strength, antibacterial property, high transparency and low water absorption buffer performance, the cost is greatly reduced compared with that of a traditional PLA material, industrial composting facilities are not needed, the restriction of performance-degradation-cost in the whole process from raw materials to the process is broken through, and industrial replacement of green materials is achieved.

This invention relates to the field of backfill technology, specifically to a green material for backfilling cofferdam boreholes and its preparation method. The green material for backfilling cofferdam boreholes comprises the following components by weight: 21-33 parts cement, 3.5-4.5 parts bentonite, 60-70 parts clay, 3-5 parts modified sawdust, 60-66 parts deionized water, and 2-6 parts modified fiber. The green material for backfilling cofferdam boreholes prepared by this invention has good hydration ability and strong compressive strength. Furthermore, through the combination of modified sawdust and modified fiber, a mechanical interlocking effect is formed between them, effectively improving the cohesiveness of the prepared backfill material.

The invention relates to the technical field of medicinal plant processing, and discloses dendrobium huoshanense low-temperature vacuum continuous drying equipment which comprises a vacuum tank body, an inner conveying pipe body, a shaft pipe and a spiral twisting piece rotationally installed on the inner wall of the inner conveying pipe body. The spiral twisting piece is fixed on the inner wall of the axis at one end of the vacuum tank body, and the spiral twisting piece is rotationally arranged on the outer wall of the inner conveying pipe body in a sleeving manner; and the screw pitches of the spiral twisting sheets are sequentially arranged from small to large from the position of the discharge port to the discharge port. According to the equipment, through the partition design of the green material area, the buffer area and the dry material area, materials are dried in different stages in sequence, vapor generated by drying is limited to only escape towards the two sides by means of a closed spiral channel space, the vapor is extracted in time by means of an external vapor extraction device, a continuous discharging pipe and a one-way air port formed in the material area, moisture regaining of the dry materials is avoided, and the drying efficiency is improved. Therefore, the drying period is shortened, and the drying uniformity and the product quality are improved.

The invention discloses a zero-dimensional tetranuclear copper iodine cluster organic-inorganic hybrid crystalline scintillator material and a preparation method and application thereof, and belongs to the field of materials. The chemical formula of the organic and inorganic hybrid crystalline scintillator material is (p-ttp) 4Cu4I4, wherein p-ttp is p-methyl triphenylphosphine. The organic-inorganic hybrid crystalline scintillator material is based on a zero-dimensional Cu4I4 cluster structure, utilizes the heavy atom effect of Cu and I to enhance X-ray absorption, and has yellow-green light emission (506nm). The photoyield is high, the response is quick, the linear response is good, and the thermal stability is strong. Copper is used for replacing lead, so that the toxicity is reduced, and the development trend of green materials is met. The process is simple, low in cost and easy to industrialize. The device can be applied to X-ray irradiation detection and can also be applied to illumination display industries such as OLEDs (Organic Light Emitting Diodes) and the like. And the method adapts to various application scenes.

The invention belongs to the technical field of solid waste treatment, and discloses a method for preparing foam microcrystalline glass by utilizing waste heat of hot blast furnace slag and co-treating chromium-containing sludge and a product, the method comprises the following steps: preparing raw materials according to mass percentage, and then grinding and mixing uniformly; performing compression molding on the mixed wet material to obtain a raw material; drying to obtain a green body; the preparation method comprises the following steps: preheating a high-temperature furnace to a target temperature of 1050-1200 DEG C, quickly putting a green body into the high-temperature furnace, sintering by utilizing waste heat of hot blast furnace slag, and reacting SiC with oxygen in air at high temperature to generate SiO2 and CO2 to form foam microcrystalline glass. According to the invention, through the combination of the process and the formula, the foam microcrystalline glass is prepared by fully utilizing the high-temperature waste heat of the hot blast furnace slag and the chromium-containing sludge, and the chromium-containing sludge is harmlessly treated by utilizing the waste heat, so that the prepared foam microcrystalline glass has relatively high performance, the additional value can be further improved, and the economic benefit is improved.

This invention provides a method for preparing high-modulus modified thin bamboo veneer and laminates. The method improves the material's modulus, toughness, and bonding properties while retaining the bamboo veneer. A green and environmentally friendly eutectic solvent, a compound solution of choline chloride, glycerol, and aluminum chloride hexahydrate, is used to impregnate the ultrasonically treated bamboo veneer sheets. Under specific temperature and time conditions, some lignin in the main components is removed, and the waxy layer and SiO2 on the bamboo veneer surface react chemically with the solvent components to form new silicides, significantly increasing the modulus. The waxy layer, which affects bonding, dissolves or is removed, resulting in a viscous lamination on the surface. The porosity of the main cells in the inner layer increases, facilitating subsequent bonding or other impregnation treatments, thus enabling controllable board structure and properties. The high-strength and tough modified bamboo veneer unit prepared by this invention does not require de-greening treatment, improving bamboo utilization.

The application provides a method for preparing building ceramics by using full barren material and the building ceramics, and the method comprises the following steps: mixing green mineral raw materials according to a predetermined green body formula to obtain mixed raw materials, wherein the green mineral raw materials are full barren materials; after wet ball milling, the mixed raw materials are treated to obtain a green material mud group; after adding aluminum dihydrogen phosphate solution into the green material mud group, the green material mud group is extruded to obtain a mud material, and the mud material is sent into a roller press to prepare a ceramic green body; and the ceramic green body is treated to obtain the building ceramics. By using the full barren material as the ceramic raw material, the clay is not needed, the strength of the ceramic green body is improved by adding the aluminum dihydrogen phosphate solution, the extrusion molding and the roller press treatment are used to obtain the molded ceramic green body, and the problems that the strength of the ceramic green body is reduced and the ceramic green body is difficult to be molded due to the reduction of the amount of clay are solved.

The invention discloses a method for preparing a graphene material by taking CO2 as a carbon source, which comprises the following steps: 1) separating, purifying and carbonizing a cultivated diatom colony to obtain a carbon-based precursor; loading the carbon-based precursor in a transition metal matrix to obtain a transition metal loaded carbon-based precursor; and (2) by taking the transition metal loaded carbon-based precursor as a cathode and cooperating with a conductive anode, inserting the cathode and the anode into a CO2 adsorbent, carrying out electrochemical reaction under the actions of CO2 atmosphere, high temperature and electric field to obtain a graphene crude product, and washing, carrying out suction filtration and drying to obtain the graphene material. According to the method, eutrophicated algae and captured CO2 are taken as raw materials, and an electrochemical process based on high temperature and electric field conditions is combined, so that the synergistic advantages of biological carbon sequestration and electrochemical conversion are fully exerted, the utilization efficiency of CO2 is remarkably improved, and formation of a graphene product with rich morphology and relatively large specific surface area is promoted; the related raw materials are low in cost, the process is simple, and a green material synthesis path with low energy consumption and high atom economy is constructed.

The invention discloses a magnesite enhanced ceramsite proppant preparation method and equipment, and relates to the technical field of ceramsite proppants, the magnesite enhanced ceramsite proppant preparation equipment comprises a support, a first granulation disc and a second granulation disc are obliquely and rotatably connected to the support, and the second granulation disc is located under the first granulation disc; a vortex-shaped sieve tray synchronously rotating with the first granulation tray is arranged between the first granulation tray and the second granulation tray, a plurality of sieve holes are uniformly formed in the vortex-shaped sieve tray, a discharge port is formed in the inner side of the vortex-shaped sieve tray, and a material collecting tray is arranged at the position, corresponding to the discharge port, between the vortex-shaped sieve tray and the second granulation tray; a mother nucleus forming device fixedly connected with the support is arranged above the first granulation disc and comprises a charging barrel, and the inner side of the charging barrel is rotationally connected with a rotating shaft. According to the preparation method and equipment of the magnesite enhanced ceramsite proppant, relatively high strength can be obtained while low apparent density can be maintained, and meanwhile, the blank forming efficiency can be improved.

The utility model discloses a polishing device for on-line surfacing repair of a raw material grinding roller, which comprises a polishing motor and two semicircular polishing mechanisms, one ends of the two polishing mechanisms are hinged, and the two ends of the two polishing mechanisms are fixedly connected through a positioning insertion plate. The two semicircular grinding mechanisms enable the device to be conveniently opened and closed so as to clamp a grinding roller during online repair, and the flexibility and applicability of the grinding device are greatly improved; meanwhile, a semi-annular grinding support and an abrasive belt are arranged in the grinding mechanism, and a driving gear and a driven gear which are matched with the semi-annular grinding support and the abrasive belt ensure that the abrasive belt can be in uniform and stable contact with the surface of the grinding roller in the grinding process, so that the grinding efficiency and the grinding quality are improved.

This invention discloses a green renovation construction method for ancient buildings based on the concept of coexistence of old and new, including the following steps: construction and evaluation of a digital twin model of the building's full information; selective structural repair and reinforcement based on the principles of reversibility and minimal intervention; modular implantation and integration of adaptive functional systems; selection of regional ecological building materials and integration of old and new materials; deployment and operation and maintenance of an intelligent health monitoring and early warning system for the entire building life cycle. This invention, by disclosing a highly detailed and systematic construction method for the renovation of ancient buildings, innovatively proposes a complete set of technical processes and management logic that runs through the entire process of "evaluation-repair-renovation-operation and maintenance," and fully describes a comprehensive construction method centered on "repair, restoration, and reinforcement," integrating modern digital technology, green material technology, and intelligent monitoring technology, which has high promotional value.

The invention relates to a scheme design method of a metakaolin-based geopolymer composite cementing material, and belongs to the field of waste resource utilization. The problems that the geopolymer coagulation time is too short, the obdurability is low, the alkalinity is high, the cost is high, the engineering application is limited, the geopolymer is difficult to replace cement by a single precursor raw material, industrial waste is accumulated and the like due to a common alkali activator at present are solved. The preparation method comprises the following steps: firstly, preparing a geopolymer, mixing metakaolin, slag powder and silica fume to obtain precursor powder, selecting a sodium hydroxide solution to adjust the modulus of water glass, and sufficiently and uniformly mixing the materials to obtain a geopolymer cementing material; and determining the optimal formula of the geopolymer material through coagulation time determination, fluidity determination and compression and fracture resistance tests. The formula of the metakaolin-based geopolymer composite cementing material is optimized, and the obdurability of the material is improved, so that a green material capable of replacing cement is provided, the utilization problem of industrial waste is improved, and the geopolymer performance is effectively improved.

The application discloses a preparation method of refractory material and the refractory material, and relates to the technical field of refractory material. The application solves the technical problems of the existing technology, such as the complex process for obtaining the refractory material suitable for titanium-zirconium and its alloy precision casting, high cost, and difficulty in cleaning the ceramic core when titanium-zirconium and its alloy is cast in some narrow gaps, runners, cavities, air passages and other spaces. The preparation method of the refractory material comprises the following steps: uniformly mixing calcium carbonate and yttrium trioxide into a mixture according to a molar ratio of 1:2-4; drying the mixture to form a powder; wet ball milling the powder, and then constant-temperature drying to form a powder, wherein the powder drying time is greater than or equal to 48 hours; adding 5% of polyvinyl alcohol binder by weight into the powder to granulate and sieve to form a green material, and then drying the green material after being pressed to form a green body; and high-temperature sintering the green body. The refractory material has excellent stability, high refractoriness and strength, and the kerosene has a self-collapse characteristic.

The invention relates to the technical field of tunnel geotechnical engineering model similar materials, in particular to a similar material for simulating tunnel surrounding rock in a fault fracture zone and a preparation method. The similar materials comprise river sand, fly ash, bryozoatum and wood chips; the preparation method specifically comprises the following steps: determining the physical and mechanical parameter range of the similar material according to the actual physical and mechanical parameters, the similarity ratio and the like of the tunnel surrounding rock in the fault fracture zone; determining the weight ratio of the corresponding raw materials according to the physical and mechanical parameter range of the prototype material; uniformly stirring the selected river sand, fly ash, bryozoatum and sawdust to form a mixed material in a dry state; and adding water into the mixed material, stirring in a stirrer for 2 minutes, pouring the stirred similar material into a tray container, and storing in a humid and shady area. The preparation method of the similar material is simple, and the mechanical property adaptability is wide. Similar materials are green materials which are non-toxic and free of pungent smell. As a surrounding rock similar material similar to a soil body, soil can be filled and compacted again after fault model tests of each group of working conditions are carried out, and the similar material can be repeatedly used.