35results about How to "Short setting time" patented technology

The invention provides an early-strength quick-hardening alkali-free powdery quick-setting material and a preparation method thereof. The raw materials specifically comprise a flash coagulation component, a coagulation adjusting component, a drying and stabilizing component, a reinforcing component, a grinding aiding component and a thickening component. The percentage of each component is as follows: 45wt%-55wt% of the flash setting component, 3wt%-10wt% of the setting adjusting component, 5wt%-15wt% of the drying stabilizing component, 25wt%-35wt% of the reinforcing component, 1wt%-5wt% of the grinding aid component and 2wt%-8wt% of the thickening component. The early-strength quick-hardening alkali-free powdery quick-setting material disclosed by the invention can simultaneously meet the following requirements: (1) the initial setting time of neat paste is less than 2min, and the final setting time is less than 3min; (2) the 1d strength of the mortar is greater than 13MPa, the 28d compressive strength ratio is greater than 105%, and the 90d strength retention rate is greater than 110%; (3) the alkali content (in terms of Na2O equivalent) is lower than 0.5%; (4) the compatibility with cement of different manufacturers is good, the use dosage is low, and good popularization and application values are achieved.

The invention discloses a light spray coating and a construction process thereof. The light spray coating comprises 15-20% of cement, 15-20% of plant particles, 35-40% of building material particles, 15-18% of clay, 5-8% of siliceous superfine powder, 3-5% of cellulose, 3-5% of alumina micropowder and 0.02-0.05% of aluminum powder. The construction process comprises the following steps: S1, mixing and stirring the light spraying material, adding water accounting for about 3% of the total weight of the light spraying material for wetting, forming a semi-dry material, and filling the semi-dry material into a powder tank of a powder spraying machine; s2, a semi-dry method is adopted for spraying, the semi-dry material in the step S1 is fed into a muzzle of a powder spraying gun, atomized water is added into the muzzle, and the semi-dry material is sprayed to a construction part in the sequence of water first and material second; and rubber powder is added into the atomized water. The materials in the spray coating are simple and easy to obtain, the cost is low, the effects of comprehensive reinforcement and no influence on the internal ecology of the soil can be achieved, the construction is simple and rapid, and a construction foundation does not need to be built; the setting time is extremely short, and the construction period is not delayed; the terrain does not need to be considered, the construction surface is smooth, and the original construction part is not changed too much.

The invention discloses green and environment-friendly sea sand mortar as well as a preparation method and application thereof, and belongs to the technical field of building materials. The sea sand mortar comprises sea sand, a composite alkali activator, a cementing material and water, the composite alkali activator comprises potassium carbonate and sodium silicate; the cementing material comprises slag powder and fly ash. The preparation method of the sea sand mortar comprises the following steps: S1, pretreating sea sand; s2, mixing and stirring the slag powder, the fly ash and the sea sand in proportion; s3, adding the composite alkali activator, and stirring twice to obtain the sea sand mortar. The sea sand mortar provided by the invention has good compressive strength and breaking strength and short setting time, so that the mortar is suitable for construction application of rapid repair, and also has the characteristics of low carbon and environmental protection.

The invention discloses a geopolymer loess curing agent formula based on multi-element bulk solid waste and a preparation method thereof, and relates to the technical field of bulk solid waste geopolymer loess curing agents, the geopolymer loess curing agent formula comprises the following components: 50-70 parts of a curing material component, 10-30 parts of a reinforcing component, and 5-25 parts of an excitation component; the curing material component is fly ash, and the particle size of the curing material component is smaller than 300 microns; the reinforcing component is rice hull ash (the main component is SiO2); the single-component geopolymer curing agent is prepared by taking the rice hull ash and bulk solid waste as main raw materials, the use amount of solid waste exceeds 80%, on one hand, various solid waste can be effectively treated through the method, and on the other hand, the use amount of the solid waste is reduced; on the one hand, the solid waste can be converted into a product with a high additional value, full utilization of resources is achieved, on the other hand, the stacking cost of the solid waste can be reduced, the negative influence of the solid waste on the environment is reduced, and meanwhile a large number of resources are saved.

The invention provides a springback-reducing admixture for sprayed concrete and a preparation method of the springback-reducing admixture, and relates to the technical field of concrete admixtures. The springback-reducing admixture for the sprayed concrete comprises the following raw materials in percentage by mass: 40-70% of a component A and 30-60% of a component B, the component A comprises the following raw materials in percentage by mass: 30%-50% of calcined kaolin, 10%-20% of light calcined magnesia and 40%-60% of semi-hydrated gypsum. And the component B comprises the following raw materials in percentage by mass: 60-90% of cement, 5-10% of modified rubber powder and 5-10% of cellulose. The springback-reducing admixture for sprayed concrete provided by the invention is applied to sprayed concrete and has relatively low springback rate and relatively high strength.

The invention relates to the technical field of filling materials, in particular to a full-solid-waste high-flow-state mine filling material, slurry containing the full-solid-waste high-flow-state mine filling material and a preparation method. The invention provides an all-solid-waste high-flow-state mine filling material which comprises the following components in parts by mass: 130-160 parts of a cementing material, 20-50 parts of an admixture, 300-400 parts of aggregate and 1-12 parts of an additive, the additive is prepared from the following components in parts by weight: 1 to 10 parts of exciting agent, 0.05 to 0.1 part of water-retaining thickening agent, 0.1 to 0.5 part of water reducing agent and 0.01 to 0.5 part of coagulation accelerator. According to the filling material, various solid wastes are used as main raw materials and matched with specific additives, so that synergistic utilization of different solid wastes is realized, and the green filling material with low carbon emission, low energy consumption and low cost is obtained. Slurry of the filling material has the high flow state maintaining characteristic of 3-4 h, the purpose of being capable of being pumped for a long time is achieved, and the slurry can be gradually coagulated within 6-8 h and reach the demolding self-standing standard.

The invention provides a multi-source solid waste composite filling cementing material, a preparation method thereof and a filling material containing the multi-source solid waste composite filling cementing material, and belongs to the field of building materials. According to the invention, sodium sulfate is utilized to modify gypsum separated and extracted from biological oxidation liquid, raw material components and proportion are reasonably designed, gypsum, water granulated slag, fly ash and other solid wastes are mixed, and the use cost of the cementing material is effectively reduced. The multi-source solid waste composite filling cementing material comprises the following raw materials in parts by weight: 15.5-20.5 parts of gypsum powder, 10-15 parts of sodium sulfate, 22.5-27.5 parts of water granulated slag micro powder, 22.5-27.5 parts of fly ash, 2.5-7.5 parts of cement clinker, 7.5-12.5 parts of quick lime and 0.5-2 parts of an active excitant, the cementing material contains more active components, the hydration speed is high, multiple hydration products are generated, the setting time is short, and the cementing material is suitable for large-scale production. And the filling material prepared from the material has high strength index.

The invention provides a method and a structure for renovating cavity diseases behind existing railway tunnel linings. The existing railway tunnel lining back cavity disease treatment method comprises the step of filling and reinforcing the low-elasticity light grouting material. The low-elasticity light grouting material is adopted to fill and reinforce the cavity after the tunnel lining, and the low-elasticity light grouting material has the excellent performance characteristics of quick setting, light weight, low-elasticity damping property, water resistance and the like, so that the filling can be completed in a short skylight time; the impact load of part of falling blocks of the surrounding rock can be absorbed or dispersed, the secondary load of the tunnel lining is greatly reduced, a certain waterproof effect is generated on leakage water of the surrounding rock, the back cavity damage of the tunnel lining treated through the method is remarkably improved, and the structural stability of the tunnel lining is greatly improved.

The invention relates to an additive for enhancing the repairing capacity of an asphalt concrete pavement and a preparation method of the additive, and belongs to the technical field of asphalt concrete pavement repairing. The preparation raw materials comprise 10-15 parts of a surface coagulant, 10-15 parts of diathermanous filaments, 3-9 parts of a surfactant, 6-8 parts of an antioxidant, 3-6 parts of an anti-ultraviolet agent and 30-40 parts of a styrene-butadiene-styrene block copolymer. The surface coagulator prepared from the anaerobic adhesive solution, the alpha-cyanoacrylate adhesive solution and the pore increasing powder enables the surface of the additive to be coagulated for a shorter time, and when cracks on the asphalt pavement are repaired, traffic can be opened to the fastest extent, so that the road section closing time is shortened as much as possible, and the pressure of road congestion is relieved as much as possible; besides, the area of penetration and extension of the additive into the asphalt through cracks is maximum, so that the overall strength and stability of a repaired part are enhanced, cracks, potholes and other diseases can be better filled, and the flatness and durability of a road are improved.

The invention relates to the technical field of preparation of alkali-free liquid accelerators, and discloses a preparation method of a fluorine-free alkali-free sulfur-free chlorine-free alkali-free liquid accelerator which comprises the following components: aluminum formate, aluminum dihydrogen phosphate, an organic coagulant, fumed nano-silica, water and an early strength agent. The accelerator disclosed by the invention is completely free of alkali, chlorine and sulfate radicals, so that the adverse effect of the accelerator on the performance of concrete is avoided, the overall performance of the concrete is improved, the efficient and stable accelerator is formed, the initial setting time and the final setting time of the concrete are effectively prolonged, and the engineering construction efficiency is enhanced.

The invention discloses a low-temperature fluid loss agent and a preparation method thereof, the low-temperature fluid loss agent is prepared by polymerizing the following components: 2-acrylamido-2-methylpropanesulfonic acid, an amide monomer, a carboxylic acid monomer, a molecular regulator and an additive, and the additive is di (triethanolamine) diisopropyl titanate. The preparation method comprises the following steps: sequentially adding water, 2-acrylamido-2-methylpropanesulfonic acid, an amide monomer, a carboxylic acid monomer and a molecular regulator into a three-neck flask with a thermometer and a stirrer to obtain a reaction solution; stirring the reaction liquid, adjusting the pH value to 7, and heating; adding an initiator, and continuously reacting; and adding an additive, stirring, drying and crushing to obtain the fluid loss agent. The additive di (triethanolamine) diisopropyl titanate added in the invention has coupling and early strength characteristics due to a unique structure, can realize good compatibility with anhydrous sodium metasilicate, and can meet the requirements of low water loss, short cement setting time and fast strength development when the addition amount of the additive di (triethanolamine) diisopropyl titanate is low in the cement.

This invention discloses a method for solidifying arsenic using copper slag. The method involves adding arsenic-containing substances to copper slag, mixing it thoroughly, adding a sulfuric acid solution with a mass concentration of 10-25%, stirring evenly at room temperature, molding, demolding, and curing to achieve the purpose of solidifying arsenic. This invention utilizes the chemical reaction between copper slag and sulfuric acid solution to harden the material, thereby generating strength. When used as a casting material, it not only has the characteristics of fast setting time, good stability, and good durability, but also has excellent adhesion, realizing the comprehensive utilization of industrial waste.

The invention relates to the technical field of track traffic track bed disease treatment, and discloses an existing line elastic short sleeper monolithic track bed disease treatment method under space-time limited conditions, which comprises the following steps of: performing inclined downward punching operation on track bed surfaces on two sides of an elastic short sleeper to form an included angle less than 90 degrees between a formed hole channel and the elastic short sleeper; a metal pouring needle is embedded in the hole channel; temporarily plugging the contact part of the elastic short sleeper and the ballast bed, and reserving an exhaust hole; a polymer pouring material is poured into gaps among the elastic short sleeper, the rubber sleeve shoe and the ballast bed through the hole channels under the pressure, and when the polymer pouring material overflows from the exhaust holes, the pouring work is completed; and after the polymer pouring material is cured, the pouring hole is blocked, and the temporary blocking material of the elastic short sleeper is removed. According to the method, under the condition that normal operation of a line is not affected, the problems of gap opening, empty hoisting and the like of the elastic short sleeper monolithic track bed can be rapidly and efficiently solved.

The application discloses an ultra-high performance concrete for reinforcing an existing structure and a preparation method thereof. The ultra-high performance concrete for reinforcing the existing structure is composed of the following components in parts by weight: 370-500 parts of Portland cement, 340-560 parts of self-stress sulphoaluminate cement, 80-150 parts of silica ash, 80-120 parts of composite admixture, 0.24-0.4 parts of lithium salt, 5-8.4 parts of composite retarder, 900-1150 parts of quartz sand, 160-220 parts of steel fiber, 27-36 parts of water reducing agent and 142-192 parts of water. Compared with a traditional UHPC, the ultra-high performance concrete has the advantages of short setting time, high hourly strength, strong anti-interference performance and certain micro-expansion, can be self-compacted and free-vibrated after being poured in a narrow space between an existing structure and a formwork, can match a reinforcing construction window period, has high hourly strength after setting and hardening, plays a good anti-dynamic-load-disturbance-cracking role in the construction without interrupting traffic, and has appropriate expansion, so that the adhesion between the outer layer and the existing structure is further improved, the two are more closely combined, and the reinforcing effect is better.

The invention discloses an in-situ mucky soil deep foundation pit construction method. The method comprises the following steps that an area to be treated is divided into a plurality of square blocks and a plurality of layers of step areas; sequentially executing the following operations on each step area in the to-be-treated area from top to bottom: adding a curing agent, stirring, standing, digging out the mucky soil after the mucky soil is cured, and arranging a protective layer; and a curing agent is added into the mucky soil at the bottom of the lowermost step area, standing is conducted after even stirring, and construction is completed after the mucky soil meets the curing strength design requirement. A soil stabilizer is adopted for foundation pit mucky soil solidification, a single process is adopted for construction, and the excavation difficulty is reduced; according to the in-situ mucky soil deep foundation pit construction method, the bottom of a foundation pit and a side slope are solidified, the construction process is simple, and site construction is convenient and fast; the anti-seepage performance of the solidified soil body is remarkably improved, and foundation pit water seepage can be effectively reduced; the solidification time of the solidified soil is short, the project construction period is shortened, and good economic benefits are achieved.

The invention discloses a high-water-quick-setting foaming material for preventing and extinguishing fire and a preparation method thereof. The high-water-quick-setting foaming material comprises a component A, a component B and a component C, the component A consists of sulphoaluminate cement, phosphogypsum, an accelerator A, a retarder and a suspending agent in a mass ratio of 10: (2-4): 0.03: 0.05: 0.05; the component B is prepared from Portland cement, ardealite, an accelerator B, a retarder and a suspending agent in a mass ratio of 10: (1-3): 0.03: 0.05: 0.05; the component C is composed of a foaming agent and a foam stabilizer in a mass ratio of 1: 0.01; the component A, the component B and the component C are respectively mixed with water according to a water-cement ratio of (3-6): 1, and then are mutually mixed to prepare the high-water-quick-setting foaming material. The material not only has dual effects of fire prevention and fire extinguishment, but also has the advantages of high condensation speed, high consolidation capacity, good air leakage stoppage effect and capability of longitudinally stacking and inerting a target fire area, and the fire prevention and extinguishment effect of a mining area is ensured.

The present application relates to the technical field of 3D printing concrete, and discloses a preparation method of 3D printing concrete mixed with plant fibers, which comprises the following steps: step 1, soaking and drying the plant fibers treated with water glass in saturated limewater; step 2, blending the plant fibers with sulphoaluminate cement; step 3, preparing alkali-activated 3D printing concrete and pumping it by taking 30-50 parts of water glass, 20-40 parts of sodium hydroxide, 100-200 parts of limestone powder, 1000-1200 parts of sand, 100-200 parts of extra-fine sand, 400-500 parts of mineral powder, 50-150 parts of rice husk ash, 20-40 parts of hydroxypropyl methyl cellulose, 220-300 parts of water and 5-10 parts of water reducing agent according to mass fraction; step 4, forcibly stirring the concrete and adding the product obtained in step 2; and step 5, printing the concrete and spraying a setting agent between the concrete layers. The present application helps to improve the constructability of 3D printing concrete and reduce its shrinkage.

The invention provides a preparation method of a water-based epoxy interface agent for tile paving. The preparation method specifically comprises the following steps: S1, preparing modified nonionic self-emulsifying water-based epoxy resin; s2, preparing a curing agent; s3, preparing a toughening agent; and S4, uniformly stirring the modified nonionic self-emulsifying water-borne epoxy resin and the curing agent, then adding the flexibilizer, uniformly stirring again, then sequentially adding the Portland cement, the river sand, the fly ash, the water reducing agent, the cellulose ether and the water, and fully and uniformly stirring at room temperature. Through the innovation of the whole preparation process of the water-based epoxy interface agent and the synergistic effect of the modified nonionic self-emulsifying water-based epoxy resin, the star branched polymer-linear water-based epoxy curing agent and the flexibilizer, the water-based epoxy interface agent can be obtained, and the water-based epoxy interface agent has the advantages of permeation resistance, chlorine salt erosion resistance, freezing and thawing resistance, crack resistance, high crack resistance, high water resistance and the like. The water-based epoxy interface agent has the advantages of good durability, short setting time and high bonding strength, and is especially suitable for tile paving.

The invention discloses aluminoferrite cement and a preparation method thereof, belongs to the technical field of building materials, and aims to solve the technical problems that in the prior art, the strength of the cement cannot be remarkably improved by doping an organic water reducing agent into the aluminoferrite cement, and the rheological property and the processability cannot be improved on the premise of ensuring the high strength of the cement. The iron aluminate cement comprises iron aluminate clinker, red mud, an early strength admixture and composite latex powder. According to the early strength admixture, sodium aminobenzene sulfonate, formaldehyde and cetylnaphthalene react to prepare a long-chain water reducing agent; the water reducing agent is modified by calcium lignosulphonate and triethanolamine to obtain the early strength admixture. The preparation method comprises the following steps: coating a nanoscale inorganic filler with a core-shell polymer emulsion containing an inner-layer structure and an outer-layer structure, and carrying out spray drying to obtain the composite latex powder. The prepared aluminoferrite cement has the advantages of high strength, high water reducing effect, high hydration speed and good rheological property.

The present invention provides an auxiliary cementitious material with high-efficiency carbon fixation based on electrostatic adsorption, and a preparation method and application thereof. The preparation method of the present invention comprises the steps of: placing ultrafine carbide slag powder in an electrostatic field to make it carry electrostatic charge, and obtaining ultrafine carbide slag powder with electrostatic charge; uniformly mixing low-calcium fly ash and ultrafine carbide slag powder with electrostatic charge, and adding them to a rotating packed bed; continuously introducing industrial waste gas containing carbon dioxide and water vapor into the rotating packed bed; after the reaction, collecting the material and drying it. The method of the present invention has cheap and easy-to-obtain raw materials, high efficiency and low energy consumption; it can permanently seal carbon dioxide in industrial waste gas, and the carbon dioxide sealing amount and sealing efficiency are high; and it fully realizes the resource recycling of waste materials such as fly ash. The obtained auxiliary cementitious material and the cementitious system prepared by compounding with cement have higher strength and faster setting time, and are expected to replace more cement clinker to prepare low-carbon composite cement.

The invention discloses an environmentally friendly production equipment and production process of an accelerating setting agent, and relates to the technical field of industrial equipment. The invention comprises a mixing device, a sintering device, a cooling device and a grinding device connected in sequence, the sintering device is provided with a sintering chamber, a sintering tank is provided in the sintering chamber, a material pushing assembly is provided on the sintering tank, and a desulfurization dust collector is also provided in the sintering device. The environmentally friendly production equipment of the invention has a high degree of automation, dust is bound in a feeding pipe, the desulfurization dust collector is used for purifying air and removing dust, reducing environmental pollution, being beneficial to environmental protection effect, and realizing environmental protection production; the sintering tank is beneficial to increasing the firing temperature and firing efficiency, and the accelerating setting agent is made of the following raw materials in parts by weight: 20-35 parts of bauxite, 10-20 parts of sodium carbonate, 8-10 parts of calcium oxide, 10-25 parts of waste aluminum ash, 5-10 parts of silicon powder, 5%-8% of modified kaolin, and 3%-6% of bentonite. The prepared accelerating setting agent has a good accelerating setting effect on concrete, can significantly shorten the setting time of concrete, and improve the early strength.

This invention discloses a phosphorus slag-based cementitious material, its preparation method, and its application, specifically relating to the field of cementitious materials technology. The cementitious material, by weight, comprises the following components: 60-90 parts phosphorus slag powder; 5-25 parts fly ash; 5-15 parts activator; 0.25-1.5 parts early-strength agent; and 0.2-0.5 parts water-reducing agent; wherein the specific surface area of ​​the phosphorus slag powder is 400-550 m². 2 / kg, particle size (D) 90 The particle size is 20-40 μm; the early-strength agent is selected from at least one of iron salts and aluminum salts. This invention uses phosphorus slag micro-powder with a specific specific surface area as the main substrate, with a high dosage, combined with fly ash, activator, early-strength agent, and water-reducing agent to obtain phosphorus slag-based cementitious materials. By optimizing the physical properties of the phosphorus slag micro-powder and constructing a suitable composite activator-early-strength system, the 28-day compressive strength of the cementitious material reaches over 61.0 MPa, achieving a balance between "high phosphorus slag content" and "high strength".

The invention provides a bridge expansion device based on alkali-activated high-strength concrete, which comprises embedded steel bars, alkali-activated high-strength concrete, C-shaped steel expansion joint members and waterstops, the lower ends of the embedded steel bars are embedded on bridge bodies at two ends of an expansion joint, the alkali-activated high-strength concrete is arranged on the bridge bodies, and the C-shaped steel expansion joint members are arranged on the waterstops. The upper ends of the embedded steel bars are embedded in the alkali-activated high-strength concrete on the corresponding side; the C-shaped steel expansion joint component comprises two C-shaped steel expansion joint component units, the rear ends of the two C-shaped steel expansion joint component units are connected to the corresponding embedded steel bars, the C-shaped steel expansion joint component units are embedded in the alkali-activated high-strength concrete, connecting openings in the front ends of the two C-shaped steel expansion joint component units are oppositely arranged, and the two ends of the water stop belt are embedded in the corresponding connecting openings respectively. The C-shaped steel expansion joints and the embedded steel bars can be poured only through lap joint and binding, and construction is simple and efficient; the alkali-activated high-strength concrete is short in setting time and high in early strength, the site construction period can be shortened, and the purpose of rapid traffic is achieved.

The invention relates to the technical field of gypsum, and discloses a production method for ardealite desulfurization and co-production of cement, which comprises the following steps: S1, carrying out reductive decomposition on ardealite to obtain ardealite clinker, and measuring the contents of silicate, aluminoferrite and phosphate in the ardealite; s2, dividing the ardealite clinker into a plurality of equal parts according to the content measured in the step S1, sequentially adding a gel material with gradient content into each part of ardealite clinker, and uniformly mixing to obtain a mixture; s3, grinding and sieving each part of the mixed material; and mixing a plurality of parts of mixed materials, and adding composite auxiliary materials to obtain the phosphogypsum cement. According to the invention, special phase clinker which is generated by decomposing phosphogypsum and contains a mixture of calcium silicate, calcium aluminoferrite, calcium phosphate, a small amount of sulfur-containing compounds and the like is subjected to compatibility, and components such as a gel material and the like are added for mixing, grinding and the like according to special impurity components in the phosphogypsum and the content of the special impurity components in the phosphogypsum; the problems of low early strength, long setting time and the like of the phosphogypsum cement clinker due to impurities can be effectively solved.

The invention discloses a high-bonding-strength water-resistant gypsum-based tile adhesive, and belongs to the technical field of building decoration materials. The ceramic tile glue is prepared from the following raw materials in parts by mass: 60-70 parts of gypsum, 10-20 parts of ground calcium carbonate, 0.4-1 part of cellulose ether, 2-5 parts of latex powder, 2-5 parts of a reinforcing agent, 16-30 parts of aggregate, 1-3 parts of a toughening agent and 1-3 parts of a waterproof agent. The flexibilizer is hyperbranched polyester, and the waterproof agent is an organic waterproof agent containing active silicon. The ceramic tile adhesive disclosed by the invention has the characteristics of water resistance, high bonding strength, cracking resistance, freeze thawing resistance, aging resistance, short solidification time and the like, and is beneficial to improving the construction efficiency and the construction engineering quality.

The application relates to the technical field of soft soil solidification, in particular to a grouting material for a high-water-content silt rapid solidification process and a use method, which comprises 42.5-grade cement, blast furnace slag powder, gypsum, a quick-setting agent, polyvinyl alcohol, aluminum sulfate, polyacrylamide and a water reducing agent; according to the mass fraction, the 42.5-grade cement is 60-70%, the blast furnace slag powder is 20-30%, the gypsum is 2-5%, the quick-setting agent is 3-5%, the polyvinyl alcohol is 0.3-0.7%, the aluminum sulfate is 1-2%, the polyacrylamide is 0.5-1‰, and the water reducing agent is 1-2‰. The grouting material utilizes the early-strength rapid solidification principle of geopolymer materials, and combines various materials such as the quick-setting agent to regulate the hydration rate, so that the silt stratum can be rapidly disposed.

The application provides a kind of improved sulphate saline soil road base road building material and preparation method, the improved sulphate saline soil road base road building material includes the following raw material components: by mass percentage, steel slag 1~3.45%, fly ash 1~3.45%, cement 0.55~1.77%, sodium hydroxide 0.54~1.7%, water 1.68~6.38% and sulphate saline soil 83.25~95.23%, the mass percentage of each component is 100%, and the preparation method includes: step 1, the formula amount of steel slag, fly ash, cement is dried and then ground and mixed, then mixed with the formula amount of water and stirred uniformly to prepare mixed liquor A; the formula amount of NaOH is prepared to obtain 10mol / L NaOH solution; step 2, mixed liquor A and the NaOH solution prepared in step 1 are mixed to prepare geopolymer; step 3, the geopolymer is mixed with the formula amount of sulphate saline soil to obtain the product. The improved material provided by the application has the characteristics of good low-temperature resistance, strong anti-freeze-thaw cycle ability, good impermeability, small expansion, good volume stability, and high mechanical properties of the reinforced soil body.

The invention discloses green ultrahigh-performance concrete with ultrahigh fracture toughness, high strength and large fluidity and a preparation method of the green ultrahigh-performance concrete, and belongs to the technical field of ultrahigh-performance concrete. The alkali-activated concrete is used as a base material, and the modified sisal fibers and the modified graphene-PE fibers are doped, so that the green ultra-high performance concrete with ultrahigh fracture toughness, high strength and large fluidity, which has the advantages of high fracture toughness and mechanical strength, high setting speed, good fluidity, relatively high construction performance and durability and the like, is obtained; the method can be widely applied to bridge engineering and road engineering. The desulfurized fly ash, coal gangue and other industrial wastes are used as raw materials, the problems of industrial waste stacking and the like can be solved, waste is turned into wealth, resources are saved, and the environment is protected.

The invention discloses a method for preventing slurry bursting in geological structure treatment under separation layer grouting and filling mining, and belongs to the technical field of coal mine filling mining. Meanwhile, a geophysical prospecting method and a drilling method are adopted to obtain the distribution form of the non-cohesive or weakly-cohesive concealed structure in the stratum; determining an anti-burst grouting area; a grouting treatment scheme is determined according to the buried depth of the coal seam and the development condition of the hidden structure; and the grouting reinforcement effect is detected. The method not only can effectively prevent slurry bursting accidents caused by the fact that slurry flows through the hidden structure, but also can determine the grouting reinforcement area of the hidden structure through theoretical calculation, and compared with grouting reinforcement of the whole hidden structure, the cost can be effectively reduced, and the targeting of grouting reinforcement treatment of the area of the hidden structure is enhanced.

The invention belongs to the technical field of building materials, and particularly relates to a gypsum composite crystal modifier, beta-semi-hydrated gypsum and a preparation method of the beta-semi-hydrated gypsum. In order to obtain the building gypsum with excellent comprehensive performance, the composite crystal modifier is added into calcium sulfate dihydrate slurry according to a certain mass percent, the composite crystal modifier comprises a component A and a component B, the component A is at least one of metal oxides or sulfates, the component B is at least one of C1-C10 unitary, binary and polybasic organic acids or carboxylates, and the component B is at least one of calcium sulfate dihydrate and calcium sulfate dihydrate. The method is used for preparing beta-semi-hydrated gypsum. According to the invention, the standard consistency water consumption of the gypsum can be reduced, the setting time is shortened, the strength of the gypsum is improved, and the building gypsum with stable properties and excellent comprehensive performance is obtained.