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155results about How to "Improve impermeability" patented technology
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Ultrahigh-ductility cement-based composite material for ocean engineering and preparation method thereof
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.
Owner:CCCC FOURTH HARBOR ENG CO LTD +1
Magnesium phosphate cement-based concrete and preparation method thereof
PendingCN119591380AIncreased durabilityImprove compactnessSolid waste managementMagnesium phosphatePhysical chemistry
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.
Owner:CHINA CONSTR EIGHTH BUREAU SOUTH CHINA CONSTR CO LTD
Concrete with high salt corrosion resistance and preparation method thereof
PendingCN119661158Apromote hydrationImprove compactnessSolid waste managementMultiwalled carbonAcid water
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.
Owner:CHINA CONSTR WEST CONSTR SOUTHWEST CO LTD +1
Internal doping type self-repairing concrete compacting agent
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.
Owner:SHIJIAZHUANG YIDAHENGLIAN ROAD BRIDGE MATERIAL CO LTD
Self-compacting concrete and preparation method thereof
ActiveCN119551951AStrong fracture resistanceHigh mechanical strengthSolid waste managementSisal fiberStructural engineering
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.
Owner:SHANWEI GUANGTOU CONSTR ENG CO LTD
Collapsible loess curing agent as well as preparation method and use method thereof
PendingCN119613063Alarge poresHigh compressive strengthSolid waste managementRoadwaysFiberMetallurgy
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.
Owner:FOSHAN TRANSPORTATION SCI & TECH CO LTD
Method and device for rapidly and intelligently testing water absorption rate of concrete
PendingCN119667126AComprehensive assessmentRich usageUsing optical meansMaterial testing goodsTemperature controlWater storage
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.
Owner:RAILWAY CONSTR RES INST OF CHINA ACAD OF RAILWAY SCI CO LTD +2
Underwater non-dispersible grouting material as well as preparation method and application thereof
The invention provides an underwater non-dispersible grouting material as well as a preparation method and application thereof, and relates to the technical field of constructional engineering. Specifically, the red mud concrete comprises the following components in parts by mass: 150-250 parts of red mud, 10-80 parts of Portland cement, 1-8 parts of an alkali activator, 3.5-10 parts of an anti-dispersing agent, 0.5-8 parts of a water reducing agent and a certain amount of water, wherein the alkali activator comprises biomass ash, tungstate, silicate, silica fume, arginine and inorganic alkali, and the anti-dispersing agent preferably comprises sodium alginate modified polyvinyl alcohol, a cellulose compound, stone powder and maltodextrin. The grouting material is obtained by recycling the red mud as a basic raw material, and has the advantages of excellent flowing state, excellent setting time, excellent compressive strength, better underwater dispersion resistance, better construction fluidity and better durability; the preparation process is simple, the performance is excellent, the environment-friendly effect is realized, and the application prospect is good.
Owner:GUIZHOU DR SHI TECH
Epoxy plaster for repairing high-strength concrete for electric power engineering
PendingCN119639407AImprove curing integrityGood weather resistanceNon-macromolecular adhesive additivesEpoxy resin adhesivesHigh strength concreteFirming agent
The invention discloses an epoxy plaster for repairing high-strength concrete for electric power engineering, which comprises a component A and a component B. The mass ratio of the component A to the component B is (8-12): 1. The component A comprises the following components in parts by weight: 35-50 parts of bisphenol A epoxy resin, 15-25 parts of multifunctional epoxy resin, 10-15 parts of a functional diluent, 20-40 parts of filler, 1-5 parts of a coupling agent and 1-3 parts of an auxiliary agent; the component B comprises the following components in parts by weight: 45-65 parts of hydrophobic amine modifier curing agent, 20-40 parts of filler, 1-5 parts of coupling agent, 1-5 parts of adhesion promoter and 1-5 parts of assistant. The epoxy plaster is a modified high-molecular high-strength repairing and protecting material, and has the advantages of high bonding force, high temperature resistance, durability, impermeability, impact resistance, compactness, extremely high bonding force and extremely strong waterproof effect.
Owner:CHANGSHA SUOKANG NEW MATERIAL TECH CO LTD
Synchronous grouting material for low-carbon impervious shield tunnel and preparation method of synchronous grouting material
PendingCN119591357Areduce dosageImprove densification performanceSolid waste managementCarbon compositesAggregate (composite)
The invention relates to the technical field of tunnel construction materials, and discloses a low-carbon impervious synchronous grouting material for a shield tunnel and a preparation method thereof.The low-carbon impervious synchronous grouting material for the shield tunnel is mainly composed of a low-carbon composite cementing material, fine aggregate, water and an additive, wherein the mass ratio of the low-carbon composite cementing material to the fine aggregate is 0.1-0.6, and the addition amount of the additive does not exceed 0.5%. According to the synchronous grouting material for the low-carbon anti-seepage shield tunnel and the preparation method of the synchronous grouting material, the synchronous grouting material for the low-carbon anti-seepage shield tunnel is prepared through a multi-solid-waste synergistic excitation enhancement technology, recycling of solid waste is achieved, multi-source solid waste such as cement, steel slag powder, mineral powder and fly ash is adopted for synergistic compatibility to prepare a low-carbon composite cementing material, and the low-carbon anti-seepage shield tunnel is good in comprehensive performance. The mechanical property of the synchronous grouting material can be improved, waste concrete or decoration waste is cooperatively adopted as the fine aggregate, the compactness of synchronous grouting can be improved through the stone powder content, and the anti-permeability performance is excellent.
Owner:SHANGHAI RESEARCH INSTITUTE OF BUILDING SCIENCES CO LTD +1
Slope anti-slide pile and construction technology thereof
ActiveCN119615936AImprove stabilitySimple structureClimate change adaptationExcavationsShrinkage crackingShotcrete
The slope slide-resistant pile comprises a slope protection assembly, the slope protection assembly is composed of anchor rods, a slope body, reinforcing ribs, a reinforcing mesh, a transverse #-shaped frame and a vertical #-shaped frame, and the anchor rods are symmetrically and fixedly connected to the slope body; according to the slope protection device, a good stabilizing effect is provided for a slope body through the slope protection assembly, the structure is simple, and the construction efficiency is improved; the drainage assembly is prepared in advance, the installation groove is dug, rapid installation and use can be achieved, a good drainage function is provided, auxiliary drainage can be conducted through a redundant channel after the filter screen is blocked, and the use stability of the equipment is improved; by adding the accelerator into the concrete and curing for a specified long time, the concrete setting can be obviously accelerated, the early strength can be improved, the normal increase of the strength can be ensured to a certain extent, the shrinkage cracking can be reduced and prevented, and meanwhile, the stability of the slope surface is further improved by a method and a spraying process of spraying the concrete twice, so that the slope surface quality is improved. And slope landslide is effectively avoided.
Owner:GUANGDONG ZHONGMEI GEOLOGICAL ENVIRONMENT ENG CO LTD
Preparation method of glass reinforced concrete pipe and glass reinforced concrete pipe
PendingCN119658836Areduce weightReduce difficultySolid waste managementShaping reinforcementsGlass fiberAggregate (composite)
The invention provides a preparation method of a glass reinforced concrete pipe and the glass reinforced concrete pipe, and relates to the technical field of water pipe structures.The method comprises the steps that a concrete material and composite reinforcing ribs are prepared; binding the composite reinforcing ribs to obtain a reinforced framework; placing the reinforced framework in a specified mold, and then pouring a concrete material to obtain a glass reinforced concrete pipe; wherein the concrete material comprises shale ceramisite, and the mass ratio of the shale ceramisite is 27.4%-30.3%; the composite reinforcing ribs comprise alkali-free untwisted glass fiber continuous roving and unsaturated polyester resin. According to the invention, the shale ceramsite is used for replacing stone aggregate in the prior art, and the framework is prepared from the composite reinforcing ribs prepared from the alkali-free untwisted glass fiber continuous roving and the unsaturated polyester resin to replace a steel bar framework in the prior art, so that the compressive strength and the impermeability are improved, and meanwhile, the self weight is reduced; and the technical problem that the framework is easy to rust is solved, and long-term safety and reliability of actual engineering are guaranteed.
Owner:HENGRUN GRP CO LTD +2
Powder composition for cement addition and preparation process thereof
PendingCN119569371AGood dispersionImprove stabilitySolid waste managementSulfonateSodium lignosulfonate
The invention relates to the technical field of cement additives, in particular to a powder composition for cement addition and a preparation process of the powder composition, modified sodium lignin sulfonate serves as an important component of the powder composition, dispersity and stability of sodium lignin sulfonate are effectively improved through sulfomethylation and condensation reaction, and in cement concrete, the powder composition has the advantages that the dispersity and stability of sodium lignin sulfonate are improved; the modified sodium lignin sulfonate can be adsorbed on the surfaces of cement particles to form a protective film, friction force and resistance among the cement particles can be reduced, so that the fluidity of the concrete is improved, meanwhile, a sulfomethylation structure of the modified sodium lignin sulfonate can chemically react with calcium ions in the cement to form stable calcium salt, the stability of the concrete is further enhanced, and the service life of the concrete is prolonged. According to the powder composition for cement addition and the preparation method of the powder composition, the performance of cement concrete can be remarkably improved through well-designed components, and the composition has excellent flowability, anti-permeability, anti-freezing property, water resistance, mildew resistance and rust resistance.
Owner:YUNNAN SUYUAN NEW MATERIAL CO LTD
Vacuum auxiliary equipment for filling concrete and processing method
PendingCN119567407Aavoid mutual interferenceGuaranteed uptimeSurface layering apparatusWater dischargePipe
The invention relates to vacuum auxiliary equipment for filling concrete, the auxiliary equipment is used for auxiliary processing of a spiral cavity steel pipe filled with the concrete, the auxiliary equipment is located at the other end, deviating from filling equipment, of the steel pipe, and the auxiliary equipment comprises a pipeline assembly and a vacuum pump assembly, comprising a vacuum tube communicated between the outside and the spiral cavity, and one end of the vacuum tube is connected to the exhaust and drainage port; and the vacuum pump is connected with the other end, far away from the gas and water discharging opening, of the vacuum pipe, and the vacuum pump is used for discharging gas in the spiral cavity. The auxiliary equipment and the concrete conveying device are installed at the two ends of the steel pipe body respectively, mutual interference between the auxiliary equipment and the concrete conveying device is avoided through the layout design, and in the vacuum auxiliary filling process, the removal efficiency of bubbles and water in concrete is remarkably improved through the negative pressure effect; the negative effects of bubbles and water seepage on the strength and durability of the concrete structure are reduced.
Owner:NANJING DADE STEEL PIPE CO LTD
Waterproof and anti-cracking two-in-one rendering coat mortar composition
The invention provides a waterproof and anti-cracking two-in-one rendering coat mortar composition, and relates to the technical field of building coatings. The waterproof and anti-cracking two-in-one rendering coat mortar composition is prepared from the following raw material components in percentage by weight: more than or equal to 35 percent of cement, more than or equal to 2.5 percent of dispersible rubber powder, more than or equal to 50 percent of sand, more than or equal to 1 percent of a defoaming agent, 0.3 to 0.6 percent of anti-cracking fiber, 0.15 to 0.3 percent of a water reducing agent, 0.45 to 0.65 percent of a water repellent, 0.1 to 0.4 percent of cellulose and 0.3 to 0.6 percent of a thixotropic agent. Preferably, the raw material component can also comprise active kaolin. The rendering coat mortar composition disclosed by the invention has waterproof and anti-cracking properties, and a waterproof mortar working procedure in outer wall construction can be omitted.
Owner:SKSHU PAINT
Highly impermeable hydraulic concrete for pump stations and method for its production
The application relates to the field of concrete, in particular to high anti-permeability hydraulic concrete for a pump station and a preparation method thereof. The method comprises the following steps: uniformly mixing cement, fly ash, coarse and fine aggregates, nano silicon dioxide and an expansive agent to obtain a mixture, adding a water reducing agent, an air entraining agent, a crystalline waterproof agent and water, and stirring in a stirrer to uniformly mix to obtain a mixture of the high anti-permeability hydraulic concrete for the pump station. Compared with ordinary hydraulic concrete, the concrete of the application optimizes the compactness of an 'interface transition zone' through nano silicon dioxide, simultaneously compensates shrinkage through a composite expansive agent, prevents water permeation channels from being formed due to dry shrinkage cracking, and changes hydrophilic capillary pore walls into hydrophobicity through a crystalline waterproof agent to block water permeation from a physical and chemical perspective. A three-dimensional defense system is constructed through structure densification, volume densification and hydrophobicity, so that the anti-permeability of the pump station concrete is improved, cracking is reduced, and the service life of the structure can be prolonged.
Owner:广东粤海粤西供水有限公司 +2
A modified calcium oxide expansive grouting material and its preparation method and application
The invention discloses a modified calcium oxide expansive grouting material, the raw materials of which include: cement, calcium oxide expansive agent, water-based polyurethane, early strength agent, defoamer, water reducer and water; the mass ratio of cement, calcium oxide expansive agent, water-based polyurethane, early strength agent, defoamer, water reducer and water is 1000:30-90:8-12:50-70:2-4:10-14:500. The raw materials also include: limestone, silica powder, fly ash, sodium alginate, graphene oxide, microbial preparation, urea, calcium lactate; the mass ratio of limestone, silica powder, fly ash, sodium alginate, graphene oxide, microbial preparation, urea, calcium lactate and cement is 20-40:1-3:5-15:1-2:1-3:1-2:1-3:1-2:1000. The invention also discloses a preparation method and application of the modified calcium oxide expansive grouting material.
Owner:WUHAN UNIV
A quick installation mold protection integrated plate connecting piece
The utility model relates to a one -piece board connection technical field, and disclose a kind of quick installation's mold protection one -piece board connecting piece, including plate body assembly, concrete component and connecting body assembly, concrete component is installed in the side of plate body assembly, connecting body assembly is respectively sleeved in the inside of plate body assembly and concrete component;It is favorable to prevent fire spread effectively through fireproof layer and outside reinforcing layer in plate body assembly, improve mold protection one -piece board strength and stiffness, avoid the crack of plate body, improve the safety, durability and permeability resistance of building;It is favorable to be directly together with concrete structure and pour in construction process, without additional formwork removal step, to significantly improve construction efficiency, and connecting piece can ensure mold protection one -piece board and the firm connection of the concrete wall body that pours, improve the safety and stability of structure, reduce installation cost and guarantee building safety.
Owner:SHANXI HONGYUE TECH CO LTD
Waterproof construction method for cave dwelling building roof
PendingCN121803001ARealize resource utilizationCure the stubborn disease of water seepageRoof covering insulationsRoof toolsEnvironmental resource managementStructural engineering
The invention discloses a waterproof construction method for a cave dwelling building roof. The waterproof construction method comprises the following steps that firstly, part of original covering soil is dug; 2, mixing the excavated original covering soil with a curing agent, an additive and water to obtain flow-state solidified soil; and thirdly, a first layer of flow state solidified soil is poured on the compacted covering soil, then an adhesion agent is brushed, geogrids are laid, and then a second layer of flow state solidified soil is poured. According to the method, part of original covering soil of the cave dwelling building roof is excavated and prepared into the flow-state solidified soil, finally the flow-state solidified soil is poured back to the cave dwelling building roof, site spoil is utilized, resource utilization of building waste is achieved, and the method is economical and environmentally friendly; meanwhile, narrow gaps, pores and cracks which are difficult to treat by a traditional material are filled by utilizing the fluidity and the self-compaction characteristic of the fluid-state solidified soil; and furthermore, a solidified body formed after hardening has excellent anti-permeability performance, so that permeation of kiln crown covering soil water is effectively blocked, the stubborn disease of kiln crown covering soil water seepage is radically treated, and the material cost is reduced by more than 30% compared with that of a traditional method.
Owner:SHAANXI ACAD OF ARCHITECTONICS +1
Impermeable concrete and preparation method thereof
ActiveCN121913739AExtended service lifeachieve recyclingSolid waste managementCalcium silicatePolyaspartic acid
The invention belongs to the technical field of building materials, and particularly relates to impervious concrete and a preparation method thereof. The impervious concrete comprises a cementing material, aggregate, water and a self-repairing functional component, the self-repairing functional component comprises polyacrylic acid, polyaspartic acid, a calcium ion supplement and a reaction accelerator. According to the application, polyacrylic acid and polyaspartic acid are used as complexing carriers of calcium ions, when concrete micro-cracks appear, the calcium ions are driven by concentration gradient to directionally migrate to the deep positions of the cracks, substitution reaction is carried out on the calcium ions and silicate radicals and carbonate radicals in pore liquid, and hydrated calcium silicate and calcium carbonate precipitates are generated to fill the cracks; meanwhile, the polymer is released again to enter the next cycle, and multiple times of self-repairing are achieved. The prepared anti-seepage concrete is high in anti-seepage grade, large in repairing depth, capable of effectively self-repairing for multiple times, easy in raw material obtaining, simple and convenient in process, controllable in cost and suitable for important engineering structures with high anti-seepage requirements such as underground engineering, tunnels, water conservancy dams and ocean platforms.
Owner:ZHONGYI SHIXING IND (WUHAN) CO LTD
Type II expanding agent metering and proportioning device
ActiveCN224074667Ushorten the timeshorten the mixing cycleMixing operation control apparatusStructural engineeringMechanical engineering
The utility model discloses a type II expanding agent metering and proportioning device which comprises a metering and proportioning barrel, an upper positioning seat is fixedly arranged at the bottom of the metering and proportioning barrel, a lower positioning seat covers the bottom of the upper positioning seat, and meanwhile, a lower barrel body is fixedly mounted at the bottom of the lower positioning seat; a metering and proportioning assembly is fixedly arranged on the circumferential side wall of the metering and proportioning cylinder and comprises a mounting seat fixedly arranged on the circumferential side wall of the metering and proportioning cylinder. According to the type II expanding agent metering and proportioning device, the weight of a liquid expanding agent in the metering and proportioning barrel is divided into three grades, and the weight ratio of the three grades in the metering and proportioning barrel is calibrated through three groups of sealing elements mounted on the outer side of a mounting seat; the time can be greatly saved; originally, the expanding agent needs to be weighed in several minutes before each disc of concrete is stirred, but now, the pre-quantified expanding agent can be directly used, so that the stirring period is shortened, and more prefabricated parts can be produced in unit time.
Owner:TIANJIN BAOMING
Nano-composite anti-seepage coating for goaf sealing, preparation method and application of nano-composite anti-seepage coating
The invention provides a nano-composite anti-seepage coating for goaf sealing and a preparation method and application thereof. The impermeable coating comprises the following components in percentage by mass: 10 to 30 percent of nano silica sol subjected to surface organic modification, 15 to 35 percent of styrene-butadiene latex subjected to pH buffer stabilization, 0.5 to 10 percent of functional nano material subjected to surface activation treatment, 20 to 60 percent of superfine sand and the balance of short fiber, inorganic powder filler and auxiliaries. The method comprises raw material pretreatment; step-by-step gradient blending is performed; and functions are compounded. According to the application, the nano-composite anti-seepage coating is applied to surrounding rock reinforcement, crack plugging or anti-seepage sealing engineering of a coal mine goaf. The slurry has the advantages of being high in deep infiltration capacity, excellent in surface film forming and internal compatibility and stable in performance, an internal infiltration reinforcing layer and a surface sealing layer can be formed at the same time after construction, and an integrated double-layer anti-seepage network is formed.
Owner:YUNLONG LAKE LAB OF DEEP UNDERGROUND SCI & ENG +1
A fast-setting silica-alumina phosphate cement and its preparation method
This invention belongs to the field of cement materials technology, specifically disclosing a fast-setting silica-alumina phosphate cement and its preparation method. The cement includes main components and functional regulating components. The main components are 50%-70% silica-alumina raw materials, 20%-30% heterocyclic organophosphate activating raw materials, and 10%-20% modified silicate calcium raw materials. The functional regulating components include heterocyclic solvents, metal chelate polymerization accelerators, and polyhydroxy coordination early-strength agents. The functional regulating components are added additionally based on the total mass of the silica-alumina raw materials and modified silicate calcium raw materials as 100%. This invention achieves rapid setting and hardening at room temperature through the synergistic effect of the heterocyclic organophosphate activator and the functional regulating components, eliminating the need for high-temperature curing. It exhibits excellent early strength and long-term stability. The raw materials can utilize various industrial solid wastes, making it environmentally friendly and economical. It is suitable for emergency repairs, rapid construction, and low-temperature environments.
Owner:BEIJING UNIV OF TECH
Organic silicon modified resin building waterproof composite material and preparation method thereof
PendingCN121873407Aincrease elasticityImprove compactnessAnti-corrosive paintsPolyether coatingsCoated surfacePlasticizer
The invention relates to the technical field of building waterproof composite materials, in particular to an organic silicon modified resin building waterproof composite material and a preparation method thereof. Comprising a waterproof roll and a waterproof coating arranged on the surface of the waterproof roll, the waterproof coating is prepared from the following components in parts by weight: 20 to 32 parts of silane modified polyether, 15 to 30 parts of organic silicon modified resin, 5 to 10 parts of polysaccharide-based composite polylactic acid, 8 to 12 parts of plasticizer, 1 to 3 parts of curing agent, 0.5 to 2 parts of titanium dioxide and 0.5 to 3 parts of water removal agent. An organic silicon structure in the prepared waterproof composite material has the characteristic of low surface energy, so that the surface of a coating presents strong hydrophobicity, and liquid water permeation is effectively blocked; the waterproof coating can be matched with a compact cross-linked network structure to form a continuous and seamless waterproof film, realizes high hydrostatic pressure resistance and low water absorption, and is suitable for key waterproof parts such as roofs, basements and toilets.
Owner:贵州装备制造职业学院
Compensated shrinkage concrete containing acid-free weak base expanded graphite and its preparation method
The application discloses a shrinkage-compensating concrete containing acid-free weak base expandable graphite and a preparation method thereof. The concrete comprises cement 200-500 parts, mineral admixtures 50-200 parts, fine aggregate 600-800 parts, coarse aggregate 1000-1300 parts, water 120-200 parts, additive 5-15 parts and acid-free weak base low-temperature expandable graphite 15-75 parts. The expansion trigger temperature of the graphite is 90-100 DEG C, and the pH value is 6.0-8.0. The method comprises the following steps: firstly, uniformly mixing and stirring cement, mineral admixtures, fine aggregate, coarse aggregate and acid-free weak base low-temperature expandable graphite to obtain dry mixture B; secondly, mixing water and additive and adding the mixture into the dry mixture B to uniformly stir to obtain a concrete mixture; and thirdly, forming the concrete mixture, carrying out steam curing after final setting, naturally cooling to room temperature and obtaining the shrinkage-compensating concrete. Therefore, the concrete self-shrinkage can be precisely and efficiently compensated in the steam curing process of the concrete.
Owner:WUHAN TEXTILE UNIV
Lightweight foamed sand based on low temperature tolerant microbial solidifier and method of making
The application discloses a kind of light foam sandy soil based on low-temperature resistant microbial curing agent and its preparation method, the light foam sandy soil includes solid matter and liquid matter, the mass ratio of solid matter and liquid matter is 3.5-6:1, the proportion of each substance in solid matter is 78-84wt% of sandy soil, 12-18wt% of composite activator, 4-6wt% of bacterial foam adsorbent, and the liquid matter is cementing solution.The preparation method includes the following steps: preparing low-temperature resistant microbial curing agent;The prepared low-temperature resistant microbial curing agent is mixed uniformly with sandy soil to obtain solid matter;The obtained solid matter is mixed uniformly with cementing solution, i.e. to obtain light foam sandy soil based on low-temperature resistant microbial curing agent.The technical scheme of the application significantly improves the survival rate and mineralization efficiency of the strain in low-temperature environment, and the light foam sandy soil prepared using the technical scheme has a lower mass per unit volume, higher compressive strength and higher permeability resistance.
Owner:JIANGXI UNIV OF SCI & TECH
A method for detecting concrete impermeability
ActiveCN118794860BAssess impermeabilityOptimized formulaPreparing sample for investigationPermeability/surface area analysisSoil scienceStatistical analysis
The invention relates to the technical field of building material detection, and specifically discloses a concrete anti-permeability detection method. By preparing concrete specimens of standard size and combining pretreatment, permeability test and anti-permeability evaluation methods, the water penetration resistance of concrete under different conditions is systematically analyzed; concrete specimens of 150mm×150mm×150mm are prepared, and the permeability performance of each specimen is comprehensively evaluated by measuring the permeability coefficient and the penetration depth; on this basis, a permeability coefficient factor and a penetration depth factor are introduced, and an anti-permeability performance score is obtained through statistical analysis to determine whether the anti-permeability performance of the concrete specimen is normal; further, the anti-permeability performance under different temperature conditions is evaluated, and it is found that abnormal anti-permeability performance may exist under a specific temperature sub-range; and the anti-permeability performance of the concrete specimen is optimized by adjusting the batching ratio of concrete.
Owner:GUANGDONG REAL ENG INSPECTION CO LTD
A centrifugal pile, a sheet pile, a centrifugal pile assembly, and a retaining wall
ActiveCN224300028UImprove impermeabilityImprove stabilityArtificial islandsUnderwater structuresSheet pilePlugboard
The utility model discloses a kind of centrifugal pile, plugboard, centrifugal pile assembly and retaining wall, belong to supporting technical field, including centrifugal pile and plugboard, the plugboard connects adjacent the centrifugal pile, the plugboard is installed in the front end of the centrifugal pile;The centrifugal pile includes body, through-hole and at least one slot, the through-hole is axially through the body, the slot is axially opened on the outer wall of the body;The protruding part of plugboard two sides is formed to outwardly extend, the protruding part is installed in the slot.The utility model is equipped with the plugboard by front, and the protruding part is connected with the clamping of the slot, effectively improve the anti-leakage ability of structure splicing, to further optimize the structural stability, and better adapt to the installation scene of asymmetric lateral pressure.Meanwhile, the through-hole can accommodate the soil particles that seep from the connecting place of the centrifugal pile and the plugboard, and also can act as drainage channel, to further guarantee the anti-leakage ability of structure.
Owner:JIANGSU JIAZHENGHONG NEW MATERIALS TECH CO LTD
Multistage gradient drainage and three-dimensional seepage-proofing descending plate area composite waterproof structure
ActiveCN224200067UWith drainage functionImprove compactnessClimate change adaptationFloorsPondingOutfall
Owner:SHENZHEN SHANGYU CONSTR GRP CO LTD
Anti-cracking and anti-corrosion concrete and preparation method thereof
ActiveCN121948913AImprove flexural strengthImprove fracture toughnessSolid waste managementTetramineChloride
The invention discloses anti-cracking and anti-corrosion concrete and a preparation method thereof, and relates to the technical field of concrete preparation, the concrete comprises the following raw materials by weight: 350-400 parts of cement, 80-90 parts of fly ash, 170-190 parts of water, 5-8 parts of a water reducer, 1100-1200 parts of gravel, 700-800 parts of medium sand, 3-5 parts of a modified filler, 8-10 parts of a modified additive, and 3-5 parts of triethylene tetramine. In the raw material mixing process, epoxy groups in the modified additive and epoxy groups on the surface of the modified filler can react with amino groups on triethylene tetramine to form a cross-linked network, and the modified filler contains iron-based layered double hydroxides which can quickly absorb chloride ions, so that the corrosion resistance effect of the concrete is improved, and the service life of the concrete is prolonged. The modified additive forms a polysiloxane network, so that a hydrophobic network is formed in the concrete, and the anti-permeability effect of the concrete is effectively improved.
Owner:SICHUAN JINGYIDA ENG INSPECTION CO LTD