646results about How to "Improve impermeability" patented technology

The invention provides an ultrahigh-ductility cement-based composite material for ocean engineering and a preparation method of the ultrahigh-ductility cement-based composite material for ocean engineering. The concrete is prepared from the following raw materials in parts by weight: 250 to 500 parts of cement clinker, 400 to 600 parts of fly ash, 200 to 300 parts of mineral powder, 100 to 150 parts of silica fume, 160 to 240 parts of metakaolin, 600 to 900 parts of quartz sand, 10 to 20 parts of organic synthetic fiber, 20 to 30 parts of organic corrosion inhibitor, 180 to 240 parts of water and 1 to 8 parts of water reducing agent. The organic corrosion inhibitor provided by the invention can be combined with chloride ions to form a passive film, so that the corrosion of reinforcing steel bars and the invasion of the chloride ions into concrete are inhibited, and the durability of the concrete is improved; by regulating and controlling the mixing ratio of the four mineral admixtures and the mixing amount of the synthetic fiber component, the concrete can well consider high strength, high ductility, high durability, high flow state and excellent deformation resistance. The ultrahigh-ductility concrete for ocean engineering, which can meet the toughness requirements of high compression resistance, fracture resistance and impact resistance and the requirements of high chloride ion permeation resistance and steel bar corrosion resistance, can be obtained.

The invention relates to the technical field of concrete preparation, in particular to fiber-reinforced building solid waste recycled aggregate concrete and a preparation method thereof.The preparation method comprises the following preparation steps that S1, recycled coarse aggregate, slag, fly ash and river sand are mixed and stirred according to the proportion, and a cement mixture is obtained; s2, calcining the cement mixture for 2-3 hours to obtain cement clinker; s3, cement clinker, modified fibers, modified graphene oxide and tetrasodium iminodisuccinate are mixed according to the proportion and then poured into a stirrer to be stirred for 5-6 min; and S4, adding water into the stirrer according to the proportion, continuously stirring for 6-10 minutes, and taking out to obtain the fiber-reinforced building solid waste recycled aggregate concrete. According to the invention, the polystyrene fiber and the concrete are connected more tightly by using the modified fiber, and the polystyrene fiber can be subjected to multiple reactions with components in the concrete in an alkaline environment of the concrete to form a stable network structure, so that mechanical indexes such as crack resistance and breaking strength of the concrete are improved.

The invention relates to the field of mortar, and discloses environment-friendly waste tire particle modified premixed mortar and a preparation method thereof. The environment-friendly waste tire particle modified premixed mortar is prepared from the following raw materials in parts by weight: 350 to 420 parts of cement, 100 to 150 parts of fly ash, 150 to 220 parts of modified waste tire particles, 10 to 25 parts of modified carbon nanotubes, 500 to 700 parts of fine aggregate, 4 to 7 parts of a water reducing agent, 15 to 20 parts of an early strength agent, 2 to 5 parts of a photoinitiator, 1 to 3 parts of a defoaming agent, 0.4 to 1 part of a thickening agent and 190 to 275 parts of deionized water. The modified waste tire particles are obtained by introducing a plurality of crosslinking sites on the surfaces of the waste tire particles by utilizing semi-closed isophorone diisocyanate; the modified carbon nanotubes are prepared by forming polydopamine through in-situ auto-polymerization of dopamine, then performing in-situ growth of nano silicon dioxide and further introducing fluorine-containing long chains and sulfydryl groups, and the mortar is endowed with excellent mechanical strength and impermeability by adding the modified waste tire particles and the modified carbon nanotubes.

The invention relates to the field of recycled concrete, and discloses a high-strength recycled concrete formula and a preparation method thereof, the high-strength recycled concrete formula comprises the following raw materials by weight: 180-240 parts of cement, 600-800 parts of hydrophobic modified recycled coarse aggregate, 180-280 parts of recycled fine aggregate, 400-600 parts of sand, 300-500 parts of fly ash, 60-120 parts of silica fume, and 20-30 parts of a water reducer, the modified waste rubber powder is prepared from, by weight, 25-35 parts of modified waste rubber powder, 10-40 parts of polyethylene wax, 2-4 parts of m-phenylenediamine and 12-16 parts of tetramethyl orthosilicate. In the invention, by using a large amount of recycled aggregate (coarse aggregate and fine aggregate), the exploitation of new natural resources is effectively reduced, the reutilization rate of building wastes is improved, and by optimizing the proportion and adding a plurality of modifiers (such as silica fume, fly ash, modified waste rubber powder and the like), the mechanical properties such as compression resistance, fracture resistance and the like of the concrete are remarkably improved; by adding the hydrophobic modified recycled coarse aggregate and the penetrant, the impermeability and durability of the concrete are enhanced, so that the performance and the application range of the recycled concrete are improved.

The invention provides a waterborne polyurethane enhancer, a cold-resistant and salt-resistant concrete composition as well as a preparation method and application of the cold-resistant and salt-resistant concrete composition, and belongs to the technical field of buildings and civil engineering. The waterborne polyurethane enhancer comprises diisocyanate, oligomer polyol, a small molecule chain extender, oxalic acid dihydrazide, oxaloacetic acid and a catalyst, and the cold-resistant and salt-resistant concrete composition comprises cement, aggregate, a water reducing agent, an anti-freezing agent, an air entraining agent, modified straw fibers, the waterborne polyurethane enhancer, calcium silicate and water. Through mutual cooperation of all the components, the obtained concrete has excellent cold resistance, salt resistance, impermeability and compressive strength, and can meet the engineering requirements for concrete durability and use safety under low-temperature and high-salt conditions.

The invention provides magnesium phosphate cement-based concrete. The magnesium phosphate cement-based concrete is prepared from the following raw materials in parts by weight: 10-20 parts of phosphate, 30-50 parts of active magnesium oxide, 0.5-3 parts of a retarder, 5-15 parts of a mineral admixture, 0.5-4 parts of a functional additive, 20-30 parts of fine aggregate, 2-5 parts of reinforced fibers and 10-28 parts of water. The invention also provides a preparation method of the magnesium phosphate cement-based concrete. The magnesium phosphate cement-based concrete provided by the invention has a multi-layer anti-corrosion barrier, a compact microstructure, an intelligent ion barrier and good environmental adaptability, and can meet the use requirements in complex and severe environments.

The invention discloses a high-impermeability curing agent for sandy soil and a preparation method, the high-impermeability curing agent comprises the following components by mass: 30-50 parts of a solid waste-based sulfur aluminum iron series cementing material; 10 to 30 parts of slag powder; 5-30 parts of ordinary Portland cement; 5-20 parts of desulfurized gypsum; and 1-10 parts of silica fume. A curing agent system further strengthens the hydration effect and the cementing performance of the cementing material, and a formed crystal-colloid composite hydration product system contributes to the stable and compact microstructure of the cured sandy soil, so that the impermeability and the mechanical property of the sandy soil can be greatly improved; the comprehensive application of solid waste raw materials such as desulfurized gypsum and mineral powder is realized, and the stacking cost of solid wastes and the influence on the environment are reduced.

The invention relates to the technical field of cement-based building materials, in particular to a tunnel grouting material and a preparation method thereof.The tunnel grouting material is prepared by adopting cement as a cementing material, adding a large amount of industrial solid waste as an admixture, modifying steel slag to prepare semi-carbonized steel slag powder, and matching with phosphorus slag powder, carbide slag and desulfurized fly ash as the admixture. According to the preparation method, the water reducing agent and the SAP particles are added as additives, all the raw materials cooperate with one another, the grouting material which is good in flowability, compactness and mechanical property, has a long-term expansion effect in a humid environment and is good in sealing and anti-seepage effect is prepared, and efficient utilization of industrial solid waste is achieved at the same time.

The invention belongs to the technical field of geotechnical engineering, and particularly relates to a nanocarbon reinforced superfine cement-based blocking material as well as a preparation method and application thereof. The superfine cement-based blocking material prepared by the invention is prepared by uniformly mixing 45-50 parts of cement, 0.5-2.5 parts of a solid waste sintered active material, 0-0.05 part of a water reducing agent, 0.015-0.1 part of carbon nanotubes, 0.5-2.5 parts of a 1% solution of carbon quantum dots and 45-50 parts of water. The material has relatively low porosity and is not dispersed; the high groutability is achieved, and the material can permeate into tiny holes; and it is guaranteed that the material has high strength, the crushed rock bonding and reinforcing strength is high, and the material has wide application prospects.

The invention relates to a synchronous grouting material based on muddy silt shield muck and a preparation method thereof, and the synchronous grouting material comprises the following raw materials in parts by weight: 13 to 16 parts of cement, 16 to 20 parts of slag, 142 to 147 parts of fine sand containing silt powder, 0.03 to 0.1 part of trimethylsilyl ethyl acetate, 0.07 to 0.17 part of disodium hydroxyethylphosphonate, 0.03 to 0.1 part of pentasodium amino trimethylene phosphonate and 63 to 67 parts of water. According to the invention, the fine sand containing mud powder is used as a main raw material to replace bentonite and fine sand in synchronous grouting in the prior art, and is combined with a specific cement additive, so that the compressive strength and the impermeability of the synchronous grouting material are effectively improved through the synergistic effect of the components, local materials can be used, and the outward transportation and disposal cost of a large amount of muck can be greatly reduced.

The invention provides a capillary crystalline waterproof agent, a preparation method and application, and the capillary crystalline waterproof agent comprises the following raw materials in parts by weight: 80-100 parts of a non-cement-based cementing material, 15-25 parts of an alkali activator, 1.5-2.5 parts of a thickener, 12.5-22.5 parts of a flexibilizer, 0.1-0.3 part of a dispersant and 5-10 parts of a water reducer, the flexibilizer is formed by mixing carboxyl-terminated liquid rubber modified epoxy resin and inorganic ceramic particles according to the mass ratio of 7: (3-5), and the dispersing agent is alkylphenol polyoxyethylene ether. Under the action of the dispersing agent, the toughening agent can be uniformly dispersed in the concrete, so that the overall toughness of the concrete is improved. The improvement of the overall toughness not only can bear deformation or shrinkage cracking of the concrete caused by evaporation of moisture, temperature difference and external stress, but also can better resist cracking from the source, reduce cracks and pores, prevent moisture from permeating and improve the impermeability of the concrete; and the bending resistance of the concrete after complete water permeability and self-healing can also be improved.

The invention relates to the field of concrete, and particularly discloses ultra-high performance concrete and a preparation method thereof. The ultra-high performance concrete comprises the following components in parts by weight: 45-55 parts of Portland cement, 12-18 parts of silica fume, 12-18 parts of fine aggregate, 0.5-2 parts of a water reducing agent, 10-15 parts of water and 2-6 parts of reinforced fibers, wherein the fine aggregate is quartz sand with the particle size distribution of 0.2-2mm; the preparation method comprises the following steps: mixing and stirring the Portland cement, the silica fume and the fine aggregate, adding the water reducing agent and the water during stirring to obtain a concrete mixture, adding the reinforced fibers into the concrete mixture, and uniformly stirring; and pouring the concrete mixture into a mold, standing for 24 hours, carrying out steam curing on the concrete at the temperature of 40-50 DEG C and the humidity of 90-100% for 30-40 hours, demolding after the steam curing is completed, and carrying out natural curing for 10-15 days. The ultra-high performance concrete provided by the invention solves the problem of poor fluidity of ultra-high strength concrete.

The invention relates to the technical field of airport pavement slab construction, and particularly discloses a construction method for repairing an airport pavement slab without joint cutting, which comprises seven steps of dismounting an original pavement slab, arranging ribs, embedding a joint-cutting-free partition plate, pouring, pulling and pouring joints, galling and grooving, and checking repairing quality. And because the maintenance time required by the concrete is too long, the airport has to stop the air to repair the pavement slab.

The utility model discloses a variable cross-section assembly type underground diaphragm wall, and aims to overcome the defect that in the prior art, a prefabricated part is not designed or constructed in a targeted mode according to the stress characteristics of a diaphragm wall, so that the utilization rate of the cross section of the diaphragm wall component is low. The technical problem is solved through the following technical scheme that the prefabricated member with the standard section comprises a prefabricated member with the standard section, a crossover coupling and a prefabricated member with the non-standard section, and reserved steel bar holes are formed in the end faces of the two ends of the crossover coupling. Longitudinal load-bearing steel bars matched with the reserved steel bar holes are arranged on the standard-section prefabricated plate type component and the non-standard-section prefabricated plate type component. According to the stress distribution condition of the diaphragm wall, the section increasing design is adopted at the position where the section bending moment of the component is large, the section reducing design is adopted at the position where the section bending moment of the component is small, reliable connection of components with different sections is achieved through the adapter substitute, the section utilization rate of the prefabricated component is improved, and the design engineering cost of the diaphragm wall is reduced.

The invention relates to the technical field of concrete preparation, and discloses machine-made sand concrete and a preparation process thereof.The machine-made sand concrete comprises broken stone, machine-made sand, cement and water according to a conventional ratio, the cement is slag cement, and the slag cement comprises, by weight, 20-25 parts of steel slag, 18-32 parts of blast furnace slag, 2-4 parts of water, 1-3 parts of a water reducing agent, 1-3 parts of a water reducing agent and 1-3 parts of a water reducing agent. And 6-12 parts of Portland cement clinker. The prepared machine-made sand concrete is good in anti-permeability and anti-carbonization capacity, the chemical corrosion resistance and bonding strength of the machine-made sand concrete are improved through the added barium sulfide industrial waste residues, and the machine-made sand concrete has the long service life. The invention solves the industrial technical problems in preparation of green high-performance concrete from machine-made sand and industrial waste residues, and breaks through the common key technical problems of high-efficiency production regulation and control of machine-made sand and the like.

The invention discloses a low-carbon concrete material containing solid wastes and a preparation method of the low-carbon concrete material, and relates to the technical field of concrete materials. The concrete material is prepared from the following components in parts by weight: 520 to 660 parts of a cementing material, 1380 to 1650 parts of aggregate, 1.218 to 1.845 parts of an additive and 25 to 45 parts of other additives, specifically, the cementing material is prepared from 250 to 300 parts of cement, 120 to 150 parts of fly ash, 100 to 130 parts of slag powder, 20 to 30 parts of silica fume and 30 to 50 parts of metakaolin. A large amount of solid wastes are used in the formula, so that the pollution pressure on the environment is effectively reduced by utilizing the wastes; by reducing the use amount of the cement and replacing part of the cement with various solid wastes, the carbon emission in the concrete production process is effectively reduced, and the raw material cost is reduced.

The invention relates to the technical field of chemical additives of building materials, in particular to an anti-corrosion concrete additive and a preparation method thereof. The concrete additive comprises the following components in parts by weight: 40-80 parts of fly ash, 10-20 parts of modified plant fibers, 5-8 parts of a water reducing agent, 3-6 parts of inorganic salt and 10-30 parts of water, and the modified plant fibers are obtained by grafting and modifying semi-carbonized plant fibers and fluorosilane; the water reducing agent is an amphoteric polycarboxylic acid water reducing agent. In the anticorrosive concrete additive provided by the invention, concrete pores are filled with the fly ash, so that the microstructure is improved; the modified plant fiber enhances the mechanical property and crack resistance of the concrete; the amphoteric polycarboxylate superplasticizer not only improves the workability of the concrete, but also forms a protective film on the surface of the steel bar; the inorganic salt further enhances the impermeability of the concrete, and the additive can comprehensively improve the comprehensive performance of the concrete, especially the corrosion resistance and the service life of the concrete in a severe environment through multi-component compounding.

The invention provides a cold-resistant and salt-resistant concrete admixture as well as a preparation method and application thereof, and belongs to the technical field of buildings and civil engineering. The concrete admixture comprises a water reducing agent, an anti-freezing agent, calcium carbonate, polyvinyl alcohol, modified nano montmorillonite and a coupling agent, wherein the anti-freezing agent is diethylene glycol butyl ether acetate, hexaethyl phosphoramidite and copper 2-ethylhexanoate. By compounding the components, the compactness of the concrete is effectively improved, so that the concrete provided by the invention has better cold resistance, freezing resistance, impermeability and salt corrosion resistance, and the strength of the concrete can be improved.

The invention discloses concrete with high salt corrosion resistance and a preparation method of the concrete. The concrete is prepared from 300-400 kg / m < 3 > of cement, 50-150 kg / m < 3 > of slag powder, 1000-1200 kg / m < 3 > of gravel, 650-800 kg / m < 3 > of machine-made sand, 0.5-2 kg / m < 3 > of a modified polycarboxylic acid water reducing agent, 0.005-0.01 kg / m < 3 > of an air entraining agent, 0.05-0.1 kg / m < 3 > of an ion chelating agent, 0.05-0.1 kg / m < 3 > of polyacrylamide, 0.01-0.05 kg / m < 3 > of sodium methyl silicate, 0.1-0.5 kg / m < 3 > of multiwalled carbon nanotube dispersion liquid and 140-160 kg / m < 3 > of water. The preparation method comprises the following steps: stirring and mixing the modified polycarboxylate superplasticizer, the air entraining agent, the ion chelating agent, the polyacrylamide, the sodium methyl silicate and part of the water for mixing to obtain an admixture mixed solution; sequentially putting broken stones, cement, machine-made sand, the admixture mixed solution, the multi-walled carbon nanotube dispersion liquid and the rest of mixing water into a stirrer, and stirring for 2-3 minutes, so as to obtain the concrete with high salt corrosion resistance. The concrete has high salt corrosion resistance in a complex service environment, the service life of a concrete structure is effectively prolonged, and a reliable guarantee is provided for infrastructure construction.

The invention discloses a concrete viscosity modified material and a preparation method thereof, and belongs to the technical field of building materials. The concrete viscosity modifying material comprises the following components in percentage by mass: 65%-85% of a mineral admixture, 15%-35% of a modified tackifier, 1%-5% of an inorganic thixotropic agent and 1%-5% of an organic thixotropic agent, wherein the modified tackifier is obtained by taking rice hull ash obtained by calcining rice hulls, pretreated biogel and a silane coupling agent as raw materials, and performing dispersion, standing and spray drying. The modified tackifier is prepared from the rice hull ash, the biological glue and the silane coupling agent, then the mineral admixture, the inorganic thixotropic agent and the organic thixotropic agent which have high-quality thixotropic performance are compounded, the finally prepared concrete viscosity modified material has excellent thixotropy, the working performance of concrete can be improved, and meanwhile, the concrete viscosity is improved. The problems of bleeding, segregation and the like of mortar and concrete are effectively solved, and the application value is high.

The invention relates to the technical field of concrete compacting agents, and provides an internal doping type self-repairing concrete compacting agent which comprises the following components in parts by weight: 10-15 parts of a water-soluble polymer, 12-18 parts of an expanding agent, 1-3 parts of a shrinkage reducing agent, 2-8 parts of organic fibers, 10-15 parts of a modifier and 30-50 parts of a diluent, the modifier comprises bauxite, diatomite and forsterite powder in a mass ratio of 1: 1: 8-8: 1: 1. According to the technical scheme, the problem that the concrete compacting agent in the related technology is poor in improvement of the anti-permeability performance of concrete is solved.

The invention discloses a manufacturing process of an easy-to-clean antibacterial ceramic product, and belongs to the technical field of ceramic product production. The preparation process comprises the following steps: mixing potassium feldspar, quartz, calcite, wollastonite and frit, grinding, sieving, adding deionized water I, carrying out wet ball milling by using flint cobblestones to prepare premixed glaze slip, sanding to prepare glaze slip I, uniformly spraying the glaze slip I on a ceramic green body, and drying in a drying kiln to form a substrate glaze surface; mixing modified halloysite and deionized water II, carrying out wet ball milling and sanding by using the flint cobblestones to prepare glaze slip II, uniformly spraying the glaze slip II on the glaze surface of the substrate, standing, feeding into a tunnel kiln, and carrying out primary firing to obtain the easy-to-clean antibacterial ceramic product. The glaze surface is smoother and more compact, the easy-cleaning performance of the glaze surface is improved, the antibacterial agent is firmly attached to the glaze surface, the antibacterial durability is enhanced, and the antibacterial performance is improved.

The invention relates to the technical field of cement, and discloses a cement material containing barium slag and a preparation method thereof.The cement material containing the barium slag is obtained by adding the barium slag, fly ash, a polycarboxylate superplasticizer, Portland cement, a boron modified quaternary ammonium salt polymer, modified ferrocene and water into a stirrer and stirring the materials evenly. Iron ions in ferrocene in the boron-modified quaternary ammonium salt polymer can be combined with hydroxyl ions in water to form a ferric hydroxide hydrate, the compound can catalyze the hydration reaction of cement, so that concrete can be hardened more quickly, the mechanical property of the concrete is enhanced, polyurethane contained in the compound can also improve the impermeability of a cement material, and the water resistance of the cement material is improved. The boron element contained in the cement can improve the durability of the cement, the sulfonic group can improve the fluidity of the cement, and the quaternary ammonium salt structure contained in the cement has a good anti-mud effect. Silicone rubber contained in the modified ferrocene can also improve the fluidity and impermeability of the cement.

The invention discloses a PCCP (prestressed concrete cylinder pipe) with multi-layer protection and a manufacturing method thereof, and particularly relates to the technical field of prestressed concrete cylinder pipes. The PCCP with the multi-layer protection comprises an inner concrete layer, a steel cylinder arranged on the outer ring of the inner concrete layer, an outer concrete layer arranged on the outer ring of the steel cylinder, a prestressed steel wire wound on the outer ring of the outer concrete layer, an inner protection layer coated on the outer side of the prestressed steel wire and used for wrapping the prestressed steel wire, and a middle protection layer coated on the outer side of the inner protection layer and used for wrapping the prestressed steel wire. And an outer protective layer is arranged on the outer side of the middle protective layer. According to the PCCP with the multi-layer protection, through multi-layer protection and strengthening measures, excellent performance and long-term durability are achieved, each structural layer plays a role independently and promotes other layers mutually to jointly form an efficient and stable system, and the overall performance and durability are improved.

The invention discloses a preparation method of an oil shale-based aggregate ultra-high performance concrete material, which comprises the following steps: (1) uniformly mixing oil shale slag, glass powder, lithium slag powder and magnesium oxide, sintering, cooling to room temperature after sintering, and crushing the sintered product to obtain an oil shale-based fine aggregate; (2) taking the following raw materials: a composite cementing material, the oil shale-based fine aggregate, fly ash, silica fume, modified ardealite powder, fibers, a water reducing agent, sodium hydroxide and / or potassium hydroxide; the composite cementing material is composed of Portland cement and mineral powder. The concrete material is obtained by uniformly mixing the raw materials, adding mixing water and uniformly stirring. According to the method disclosed by the invention, the problem that the strength and the impermeability of the ultra-high performance concrete material prepared by taking the oil shale residues as the fine aggregate are reduced is solved, and the problem that cement components of the ultra-high performance concrete material are wasted is relieved.

The invention relates to the field of concrete, and particularly discloses self-compacting concrete and a preparation method thereof. The self-compacting concrete comprises the following raw materials in parts by weight: 320-370 parts of cement; 800 to 840 parts of coarse aggregate; 750 to 780 parts of fine aggregate; 12 to 19 parts of a fiber composition; 55 to 70 parts of fly ash; 20-35 parts of steel slag powder; 1-3 parts of a water reducing agent; 140 to 175 parts of water; 8-14 parts of an expanding agent; the fiber composition is hybrid fibers of steel fibers and sisal fibers, and the weight ratio of the steel fibers to the sisal fibers is (9-13): (3-6). The self-compacting concrete has the effects of inhibiting self-constriction and plastic constriction of the self-compacting concrete, reducing generation of harmful cracks and improving the strength and impermeability of the self-compacting concrete.

The invention provides a composite mineral admixture based on iron ore tailing mud and a preparation method thereof, and the composite mineral admixture comprises the following raw materials by weight: 30-40 parts of activated iron ore tailing mud, 5-10 parts of layered ultrafine powder, 5-10 parts of a methacrylic acid-cellulose copolymer, 5-7 parts of limestone powder, 1-3 parts of a composite grinding aid, and 1-3 parts of a composite activator. According to the composite mineral admixture disclosed by the invention, the mixing amount of the composite mineral admixture in cement can be increased to the maximum extent, the use amount of cement clinker is reduced, the production cost of the cement is reduced, the composite cement has more excellent mechanical properties, volume stability and durability, and the composite mineral admixture plays a role similar to a crystal nucleus effect in a cement hydration process; and meanwhile, the hydration products tend to be uniformly distributed in the whole interface transition area, the hydration products with better stability are generated, and the anti-permeability performance is improved.

The invention relates to the technical field of civil engineering materials, and discloses a collapsible loess curing agent as well as a preparation method and a use method thereof. The collapsible loess curing agent is prepared from the following raw materials in parts by weight: 20-40 parts of slag powder, 10-20 parts of modified silica fume, 10-20 parts of biogel, 10-20 parts of desulfurized gypsum, 5-10 parts of polymer fibers, 10-30 parts of alkaline residues and 15-25 parts of cement, the components of the collapsible loess curing agent are adjusted, and on the basis of adding the cement, the collapsible loess curing agent is prepared from the following raw materials in parts by weight: 20-40 parts of slag powder, 10-20 parts of modified silica fume, 10-20 parts of biogel, 10-20 parts of desulfurized gypsum, 5-10 parts of polymer fibers, 10-30 parts of alkaline the slag powder, the desulfurized gypsum, the alkaline residues, the modified silica fume, the biological glue and the polymer fibers are synergistically matched, so that the permeability coefficient, the compressive strength and the breaking strength of the cured collapsible loess are remarkably improved, and the collapsible loess in northern areas such as Gansu, Xinjiang and the like has excellent impermeability and mechanical properties after being cured; the material can be used as a high-quality road building material.

The invention provides refractory concrete and a preparation method thereof, and belongs to the technical field of concrete. The preparation method comprises the following steps: modifying basalt fiber, modifying granite stone powder, grafting and mixing. The step of modifying the granite stone powder comprises the following steps: putting the granite stone powder into an ethanol solution, adding sorbitol laurate and polyoxyethylene sorbitan monolaurate, stirring at the stirring temperature of 46-50 DEG C, uniformly stirring, adding threonine, carrying out ball milling treatment for 26-30 minutes at the ball milling rotating speed of 114-125rpm according to the ball-to-material ratio of (3-5): 1, and after the ball milling is finished, cooling to room temperature to obtain the modified granite stone powder. Filtering and drying to obtain modified granite stone powder; the particle size of the granite stone powder is 135 to 145 nm; the mass concentration of the ethanol solution is 45-50%; the mass ratio of the granite stone powder to the ethanol solution to the sorbitol laurate to the polyoxyethylene sorbitan monolaurate to the threonine is (8.3 to 8.7) to (90 to 97) to (1.0 to 1.2) to (1.1 to 1.5) to (4.5 to 4.9); the prepared refractory concrete is high in strength, excellent in water permeability resistance, good in high-temperature corrosion resistance and low in linear shrinkage rate.

The invention discloses a method and a device for rapidly and intelligently testing the water absorption rate of concrete. The device is mainly composed of a display screen, a test grid, a test box cover plate, a test box, a stainless steel mesh, a temperature sensor, an infrared distance measuring sensor, a pressurizing hole, a water injection hole, a temperature control device, a pressurizing device, a computer host and a water storage device. And the water absorption rate of the concrete can be tested under the pressure of 0-2MPa and the water temperature of 0-80 DEG C. The test piece can be a cube with the size of 100 mm * 100 mm * 100 mm or a cylinder with the size of phi 100 mm * 100 mm. The device has the characteristics of controllable and adjustable pressure and temperature, automatic measurement of liquid level change, real-time display of water absorption and synchronous implementation of multiple groups of tests, and the accuracy, reliability and automation degree of concrete water absorption testing are remarkably improved.