1014 results about "Polypropylene fiber" patented technology

The invention discloses high-toughness ultra-high performance concrete and a preparation method thereof, and relates to the technical field of polymer modified materials thereof. The concrete is composed of a cementitious material composite system, a fiber-reinforced system and a polymer modifier, the cementitious material comprises Portland cement, nano-silica, a rice hull ash-based auxiliary cementitious material and gradient grading quartz powder, and the fiber system adopts steel fiber / basalt fiber / polypropylene fiber multi-scale composite reinforcement. And a polyurethane emulsion interface modifier is matched. During preparation, a dry mixing-fiber dispersion-wet mixing three-stage process is combined with a microfluidization emulsification and segmented polymerization technology, so that uniform dispersion of fibers and matrix-fiber interface reinforcement are realized. The scheme has high strength, high toughness and industrial feasibility, and is suitable for harsh engineering scenes such as bridge joints and explosion-proof structures.

The invention discloses a high-performance green and environment-friendly single-component polymer cement waterproof dry blend and a preparation method thereof, and relates to the technical field of building materials, the high-performance green and environment-friendly single-component polymer cement waterproof dry blend comprises the following components: an inorganic cementing material, latex powder, graded quartz sand, a functional filler, cellulose ether, an organic silicon defoamer, a polycarboxylic acid water reducer and compound fibers; the functional filler is modified waste glass powder prepared through mechanical activation and silanization modification; the compound fiber is a mixture of modified glass fiber and modified polypropylene fiber; the preparation of the modified glass fiber comprises tannic acid and polyethyleneimine combined modification and graphene oxide modification, and the preparation of the modified polypropylene fiber comprises plasma activation. The polymer cement waterproof dry blend prepared by the method adopts the glass powder to replace natural mineral filler, is energy-saving and environment-friendly, and the cement matrix is modified by various fibers, so that the prepared polymer cement dry blend is excellent in comprehensive performance.

The invention provides a sintered hollow batten for buildings and a preparation method, and belongs to the technical field of novel wall materials, the sintered hollow batten for buildings comprises the following raw materials: high-calcium fly ash, construction waste recycled aggregate, clay, sulphoaluminate cement, a foaming agent, reinforced fibers and an additive; wherein the particle size of the construction waste recycled aggregate is 0.5-5mm, and the construction waste recycled aggregate is subjected to plasma activation treatment; a nano TiO2 photocatalytic coating is loaded on the surface of the construction waste recycled aggregate; the reinforced fibers are composite fibers of basalt fibers and polypropylene fibers, and the mass ratio of the basalt fibers to the polypropylene fibers is (1: 1)-(1: 2). According to the sintered hollow batten for the building, the building waste recycled aggregate subjected to plasma activation treatment is adopted, and the nano titanium dioxide photocatalytic coating is loaded, so that the bonding strength of the aggregate is greatly improved, and the hollow batten is endowed with the function of degrading pollutants such as formaldehyde.

The invention provides marine concrete with salt corrosion resistance and self-repairing and a preparation method thereof.The marine concrete is prepared from, by weight, 190-210 parts of cement, 91-100 parts of a natural mineral activating group, 10-15 parts of a composite corrosion inhibitor, 30-35 parts of an exciting agent, 3-6 parts of a high-efficiency water reducing agent, 4-8 parts of a polyamide / polyether sulfone copolymer and 20-25 parts of microcapsules; the preparation method comprises the following steps: preparing the composite corrosion inhibitor and the microcapsule; mixing the cement, the natural mineral activating group, the composite corrosion inhibitor, the exciting agent and the high-efficiency water reducing agent, adding the treated polypropylene fibers and the microcapsules, reacting and curing. According to the invention, the long-acting protection and self-repairing functions of the marine concrete in a high-salt environment are realized by utilizing the cooperation of multiple physical and chemical mechanisms of various formula materials.

The invention discloses a waterproof, anti-crack and moisture-proof self-healing material for a concrete structure and a preparation method thereof, relates to the technical field of concrete, and aims to solve the problems that the mixing degree is poor and the waterproof and moisture-proof effects are reduced due to the fact that various aggregates for improving the strength are added to an existing concrete structure in order to improve the anti-crack strength. The concrete is prepared from the following raw materials by weight: 30%-50% of cement; 5%-30% of sand; 5%-30% of stones; 5%-20% of a reinforcing material; 5%-10% of polymer modified asphalt; 1%-5% of a water reducing agent; 1%-5% of an additive; 1%-5% of a chemical self-healing agent; 1%-5% of a foaming agent; the additive is one or more of a concrete expansive agent, a rapid hardening agent, a plasticizer, a polyurethane type flexible agent and a concrete retarder, and the reinforcing material is one or more of microfibers, slag, fly ash, silane ash and a cellulose material. The cellulose material is one or more of wood, hemp, polypropylene fiber and polyester fiber.

The invention relates to the technical field of concrete waterproofing agents, in particular to a high-efficiency concrete anti-crack waterproofing agent and a preparation method thereof, and the high-efficiency concrete anti-crack waterproofing agent is prepared from the following raw materials in parts by weight: a calcium sulphoaluminate expanding agent; light burning of magnesium oxide; re-burning the magnesium oxide; nano-scale silicon dioxide; metakaolin; polypropylene fibers; basalt fibers; styrene-acrylic emulsion; a silane emulsion; silica fume; hydroxypropyl methyl cellulose; and a polycarboxylic acid water reducer compatilizer. According to the high-efficiency concrete anti-crack waterproof agent disclosed by the invention, the nano-silica, the metakaolin and the styrene-acrylic emulsion synergistically block nano-to-macroscopic multi-stage pores, so that double waterproofing of physical filling and chemical film forming is realized; the polypropylene and the basalt fiber are subjected to ultrasonic dispersion and interface combination optimization to form a three-dimensional anti-crack network, the component uniformity and the functional stability are ensured through precise proportioning, graded mixing and directional granulation, meanwhile, the waterproof agent is compatible with industrial production fluctuation, large-scale application reliability is ensured, and the problems that a traditional waterproof agent is single in function and insufficient in durability are solved.

The invention provides a high-performance fiber-reinforced cement-based material and a preparation method thereof, and belongs to the technical field of building materials, the high-performance fiber-reinforced cement-based material comprises the following components by weight: 30-70% of ordinary Portland cement, 10-30% of pretreated solid waste incineration bottom ash, 0.5-2% of polypropylene fiber, 8-12% of water, and 0.5-1.5% of a water reducer; during preparation, the raw materials are weighed according to the proportion, a high-performance fiber-reinforced cement-based material sample is prepared through ultrasonic stirring, water adding stirring, fluidity adjusting, pouring vibrating and curing, the compressive strength of the prepared sample exceeds 30 MPa, the porosity is lower than that of a traditional material when the replacement rate of the pretreated solid waste incineration bottom ash is 5-10%, and the durability is remarkably improved; meanwhile, waste is effectively utilized, natural resource consumption and carbon emission are reduced, the curing efficiency of heavy metal ions in solid waste incineration bottom ash exceeds 98%, and double breakthrough of environmental protection and high performance is achieved.

The invention relates to the technical field of concrete materials, and discloses rapidly-reinforced high-performance sprayed concrete for an existing tunnel lining and a preparation method of the rapidly-reinforced high-performance sprayed concrete. The sprayed concrete is prepared from the following raw materials in parts by weight: 300 to 350 parts of low-calcium high belite sulphoaluminate cement, 80 to 100 parts of superfine slag powder, 3 to 8 parts of a trigger type activating agent, 5 to 15 parts of slow-release particles, 2 to 5 parts of nanogel, 800 to 900 parts of fine aggregate, 800 to 900 parts of coarse aggregate, 30 to 50 parts of copper-plated steel fiber, 0.8 to 1.2 parts of polypropylene fiber, 30 to 40 parts of a viscosity-adjusting accelerator, 10 to 20 parts of a water reducing agent and 160 to 180 parts of water. The sprayed concrete is high in compressive strength and good in durability, the double threats of chemical corrosion and chloride ion permeation / steel bar corrosion are cooperatively solved, and the requirement for rapid reinforcement of tunnels and underground engineering is met.

The invention relates to the technical field of pavement materials, in particular to a solid waste-based cementing material stable coal-based solid waste road base material and a preparation method thereof. According to the material, secondary modified regenerated coarse and fine aggregate is used as a framework, coal gangue powder and granulated blast furnace slag micro powder are matched, and two-step engineering of dopamine / double-amino-terminated polyethylene glycol co-deposition grafting and high-modulus silicate pre-coating is adopted, so that the synergistic improvement of the surface wettability and the interface density of the aggregate is realized. The system is cooperated with low-modulus excitation liquid and polypropylene fibers, and the mixing uniformity of the material and the quality of an interface transition area are optimized through a thin-pulp stone-wrapping and densification segmentation process. The material gives consideration to high resilience modulus, rut resistance and durability, significantly reduces the problems of high water absorption, weak interface, early cracks and the like of the recycled aggregate, is adaptive to a traditional road construction window, and has good application prospects.

The invention relates to solid waste-based self-excitation foam concrete which is characterized by comprising the following raw materials in parts by mass: 1-2 parts of a composite foaming agent, 40-60 parts of a composite precursor, 40-60 parts of an alkaline excitation material, 0.1-0.2 part of polypropylene fiber and water, and the mass ratio of water to glue is 0.45-0.55. The mineral activity of the waste incineration bottom slag, the fly ash and the granulated blast furnace slag powder is excited through the solid waste-based alkaline exciting agent, the compressive strength of the material is remarkably improved by adding the polypropylene fiber, the dry density and the heat conductivity coefficient meet expected requirements, the cost is saved, energy is saved, the environment is protected, and a new direction is provided for recycling application of industrial solid waste.

The invention discloses a light-weight moisture-conducting functional fabric and a preparation method thereof, and relates to the technical field of textile, the light-weight moisture-conducting functional fabric comprises an inner layer and an outer layer, the inner layer is obtained by blending polyester fibers and nylon special-shaped section fibers, and the outer layer is obtained by blending modified polypropylene fibers and hollow polyester fibers; the modified polypropylene fiber is obtained by mixing polypropylene slices and modified jade powder, melting, spinning and stretching; the prepared fabric has the light weight characteristic and the one-way moisture guiding capacity, sweat can be rapidly discharged out of the body, dry and comfortable isolation between the skin and the outside is achieved, and multiple health protection functions such as lasting antibiosis, efficient ultraviolet resistance and contact cool feeling are organically integrated.

The invention relates to the technical field of building material modification, in particular to an anti-freeze thawing-sulfate composite modifier and application thereof in a water-stable base layer. In road engineering, a water-stable base layer often faces the problems of freeze-thaw cycle and sulfate erosion damage. The key point of the technical scheme of the invention is as follows: on the basis of the mass of cement, a composite modifier is composed of the following components in percentage by mass: 2%-5% of sodium sulfate, 0.02%-0.05% of sodium gluconate, 0.4%-0.6% of polypropylene fiber, 0.1%-0.2% of steel fiber, 1%-3% of butadiene styrene rubber emulsion, 0.05%-0.5% of sodium carboxymethyl cellulose, 0.05%-0.1% of triethanolamine, 0.1%-0.5% of naphthalene water reducer, 0.005%-0.02% of air entraining agent, 8%-10% of silica fume and the like. The composite modifier is mainly used for the water-stabilized base, can effectively improve the freeze-thaw resistance and sulfate erosion resistance of the water-stabilized base, and prolongs the service life of a road.

The present invention discloses a high-performance shotcrete and a preparation method thereof, belonging to the technical field of shotcrete. The concrete comprises the following components by weight: 430-450 parts of cement, 800-850 parts of coarse aggregate, 850-900 parts of fine aggregate, 170-180 parts of water, 4-5 parts of a water reducer, 34-41 parts of an early-strength accelerator, 4-8 parts of a solidifying and durable component, and 1.0-1.4 parts of polypropylene fiber. A corresponding preparation method is also provided. The present invention achieves high performance shotcrete by selecting an early-strength accelerator and a solidifying and durable component and optimizing the preparation method. This can effectively reduce rebound, promote rapid development of early strength, and fully guarantee the long-term durability of shotcrete. Its application in tunnel engineering can significantly improve the performance of shotcrete, thereby improving the quality of the engineering structure and fully guaranteeing the service safety of tunnel engineering, thus having broad prospects.

The invention relates to the technical field of battery materials, and discloses a flame-retardant anti-shrinkage coating self-crosslinking lithium battery diaphragm and a forming process thereof, and the flame-retardant anti-shrinkage coating self-crosslinking lithium battery diaphragm is composed of a battery base membrane and coatings coated on the surfaces of the two sides of the base membrane; the battery base membrane is prepared from the following raw materials in parts by weight: 80 to 120 parts of polypropylene fiber, 5 to 10 parts of sodium dodecyl benzene sulfonate and 1 to 3 parts of polydimethylsiloxane; the coating is prepared from the following components in parts by weight: 10 to 20 parts of modified silicon dioxide coated aluminum oxide containing long-chain fatty acid, 80 to 150 parts of amino-terminated triethoxy silane modified polyurethane emulsion, 3 to 5 parts of defoaming agent polydimethylsiloxane and 2 to 4 parts of thickening agent sodium carboxymethyl cellulose. The thickness of the battery base film is 10-30 [mu] m, and the thickness of the coating is 3-8 [mu] m. The lithium battery diaphragm disclosed by the invention has relatively good flame-retardant and shrinkage-resistant performance, and meanwhile, the service life of a battery can be effectively prolonged.

The invention relates to a preparation method of low-carbon magnesium phosphate cement. The low-carbon magnesium phosphate cement is prepared from the following raw materials in parts by weight: 40-50 parts of magnesium oxide, 20-30 parts of phosphate, 1-2 parts of a retarder, 6-8 parts of quartz powder, 1-3 parts of glass fibers, 0.5-1.5 parts of polypropylene fibers, 1-3 parts of steel fibers, 10-20 parts of slag powder, 5-15 parts of silica fume, 1-2 parts of nano silicon dioxide, 0.5-1.5 parts of nano aluminum oxide and 4-6 parts of an additive. According to the preparation method of the low-carbon magnesium phosphate cement, mineral admixtures or industrial waste residues which are lower in price are introduced to serve as partial substitute materials, the requirement for high-cost raw materials is reduced, waste such as fly ash and slag can be used for replacing partial expensive raw materials, the production cost is reduced, cyclic utilization of resources is promoted, and the low-carbon magnesium phosphate cement is suitable for industrial production. Secondly, in order to overcome the problem that the strength of traditional low-carbon magnesium phosphate cement is reduced in water, a special retarder, a stabilizer and other modified materials are added, and dissolution of hydration products in water can be effectively inhibited.

The invention relates to the field of cement-based composite materials, and particularly discloses a high-performance self-compacting high-crack-resistance fiber-reinforced cement-based composite material and a preparation method thereof.The cement-based composite material is prepared from cement, fly ash microspheres, silica fume, a modified geopolymer, sand, fine stone, polypropylene fibers, an expanding agent, an additive and water; wherein the additive at least comprises welan gum; the preparation method comprises the following steps: mixing and stirring the cement, the fly ash beads, the silica fume, the sand, the fine stone and the modified geopolymer, and adding the expanding agent to prepare a primary mixture; and mixing the admixture with water, adding the primary mixture, then adding the polypropylene fiber, stirring and mixing, then adding the rest admixture, and stirring to obtain the product. The cement-based composite material has the characteristics that the prepared cement-based composite material has better fluidity and better segregation resistance and crack resistance, and the cement-based composite material can be applied to the fields of non-dismantling bottom die floor support plate bottom plates, foundation support grouting reinforcement, section increasing method reinforcement, quick pavement repair and the like.

The invention discloses a coal gangue-based reinforced cement composite material and a preparation method thereof, and relates to the technical field of building materials. The coal gangue-based reinforced cement composite material is prepared from a coal gangue-based reinforced admixture, calcium ion doped modified multi-walled carbon nanotubes, polypropylene fibers, P.O42.5 Portland cement, metakaolin, silica fume, a polycarboxylate superplasticizer and water, calcium ion doped modified multi-walled carbon nanotubes and a coal gangue based reinforced admixture are cooperatively added into a cement matrix, seamless filling from nanometer to micrometer is achieved, a tough interface transition area is formed, pressure is jointly borne by a compact matrix and a strong interface, the compressive strength and breaking strength of the material are remarkably enhanced, and meanwhile, the compressive strength and breaking strength of the material are greatly improved. Migration of moisture and ions is effectively blocked, and the anti-permeability performance of the material is improved.

The invention discloses a temperature control anti-cracking structure for mass concrete of a power plant and a construction method. According to the invention, the combination of the low-heat Portland cement and the composite admixture effectively reduces early hydration heat, reduces microcracks caused by thermal stress, and improves the compactness and stability of the concrete. And secondly, the compactness of the concrete is further ensured through reasonable grading of the machine-made sand and the granite macadam, and the structural integrity is enhanced. Functional additives such as a polycarboxylate superplasticizer and a magnesium oxide expanding agent not only improve the working performance of the concrete, but also offset the shrinkage stress through the delayed expansion effect, thereby effectively preventing the generation of cracks. In addition, due to the introduction of the phase change microcapsule material, the polypropylene fiber and the steel fiber, the temperature control and crack resistance of the concrete is remarkably enhanced through hydration heat absorption and double-fiber synergistic toughening.

The invention discloses lightweight thermal insulation concrete and a preparation method thereof, and belongs to the technical field of lightweight concrete. The lightweight thermal insulation concrete is prepared from the following raw materials in parts by weight: 20 to 25 parts of fly ash geopolymer slurry, 60 to 70 parts of cement, 20 to 24 parts of glass beads, 100 to 110 parts of modified ceramsite, 15 to 17 parts of polypropylene fiber, 5 to 7 parts of potassium silicate, 16 to 20 parts of pure acrylic emulsion, 1.5 to 2 parts of gamma-aminopropyltriethoxysilane, 0.8 to 1.0 part of polycarboxylic acid water reducer and 0.3 to 0.5 part of cellulose ether. 3-5 parts of a foaming agent, 1-2 parts of a synergist and 50-60 parts of water. The lightweight concrete prepared by adding the modified ceramsite, the synergist dipropylene glycol monomethyl ether, the compound foaming agent and other specific material components is good in thermal insulation effect and excellent in crack resistance and frost resistance, and the comprehensive performance is synchronously improved.

The present invention relates to the field of fibers, and in particular, to a preparation method for a protein composite fiber. The preparation method comprises spinning, pretreatment, surface treatment, preparation of modified mineral powder, loading, mixing and crosslinking. A pretreated nascent fiber is immersed in a protein composite solution to be in full contact with modified extract mineral powder and a soluble protein, and a crosslinking reaction is carried out; the structure of the dried fiber is more compact; the extract and the soluble protein are more stable in the fiber while the fiber strength is improved; and the loss rate is less than 1% after washing for 50 times. The protein composite fiber prepared by the present invention is skin-friendly and soft, has good moisture absorption and moisturizing effects, and is rich in amino acid and protein, wherein the content of the protein is up to about 12%. Moreover, in the present invention, a common fiber is used as a base material, thereby achieving natural antibacterial, anti-oxidation and deodorizing effects while endowing fibers such as viscose, acrylic fibers, polyester, chinlon, vinylon, and polypropylene fibers with the advantages of a natural protein on the basis of ensuring excellent properties of the base material itself, and thus the range of application is wider.

The invention discloses concrete suitable for a high-altitude large-temperature-difference environment, and belongs to the technical field of building materials. In order to solve the problems of insufficient durability and easy cracking of traditional concrete in high altitude areas due to large day and night temperature difference, the technical scheme provided by the invention is as follows: a cementing material is a composite system composed of Portland cement, fly ash and slag powder, is matched with 5-20mm continuous grading coarse aggregate and river sand with fineness modulus of 2.3-2.8, and is added with basalt fiber and polypropylene fiber; and an air entraining agent, a polycarboxylate superplasticizer and water. The concrete has excellent crack resistance, freezing and thawing resistance and thermal stability by optimizing aggregate gradation, introducing multi-scale fiber for reinforcement, regulating and controlling the hydration heat of a cementing material and matching with an additive in a specific proportion to improve the working performance. The concrete is suitable for engineering such as plateau bridges and tunnels, the service life of the structure can be remarkably prolonged, and the maintenance cost is reduced.

The invention discloses a high-toughness polypropylene staple fiber and a preparation method thereof, and relates to the technical field of functional polypropylene fibers. The high-toughness polypropylene short fiber is prepared from the following components in parts by mass: 70 to 85 parts of polypropylene resin, 10 to 20 parts of a polyolefin elastomer, 3 to 8 parts of maleic anhydride grafted polypropylene, 2 to 4 parts of a plasticizer, 1 to 3 parts of an antioxidant and 0.5 to 2 parts of a nucleating agent. By introducing the novel plasticizer with a specific structure, the entanglement resistance among polypropylene molecular chains is effectively reduced, and the molecular chains are easier to relatively slide when being stressed, so that fracture caused by stress concentration is avoided, and the stretching resistance and bending resistance of the fiber are remarkably improved.

The invention discloses a super-early-strength shrinkage-free high-crack-resistance tunnel spraying repair material in the technical field of civil engineering materials, which comprises the following raw materials in percentage by mass: 35-45% of sulphoaluminate cement; 8%-12% of a superfine early strength admixture; 2%-3% of a calcium sulphoaluminate expanding agent; 1%-2% of a magnesium oxide-based expanding agent; 1-2% of a calcium-magnesium composite expanding agent; 10%-15% of hollow glass beads; 1.5%-2.5% of copper plated steel fiber; 0.1%-0.3% of polypropylene fiber; 25%-30% of graded quartz sand; 0.5%-1.0% of a polycarboxylic acid water reducing agent; 3%-5% of an alkali-free liquid accelerator; 0.3%-0.8% of a thixotropic agent; and 0.1%-0.3% of a thickening time control agent. According to the method, a multi-scale performance cooperative regulation system is innovatively constructed. Through accurate control of the hydration process of a gel system, a shrinkage stress multi-stage compensation mechanism and systematic integration of a fiber-matrix interface strengthening technology, the mutual restriction relationship among early strength development, volume stability and crack resistance of a traditional material is broken through.

The invention belongs to the technical field of building materials, and particularly relates to a preparation method of alkali-treated polypropylene fiber and recycled aggregate loaded bacillus coriolis synergistic microbial concrete. According to the method, a polypropylene fiber reinforced concrete matrix is subjected to alkali treatment, calcium carbonate is generated by combining the mineralization effect of recycled aggregate loaded microorganisms, and efficient crack repair and mechanical property improvement are achieved. The method specifically comprises the steps of microbiological treatment and loading, fiber surface modification and optimization, self-healing concrete preparation and the like. The recycled aggregate is used for fixing microorganisms and providing a mineralization environment, the interface bonding capacity is enhanced through alkali treatment fibers, and the calcium carbonate deposition efficiency is remarkably improved. The prepared self-healing concrete has excellent mechanical strength and compactness, and the repairing performance is also obviously improved. The method is simple in process and controllable in cost, the utilization of the recycled aggregate conforms to the concept of green building materials, and the method can be widely applied to preparation of microbial concrete and has remarkable environmental protection value and application prospects.

The invention relates to the technical field of floor slab concrete, and discloses aerated concrete applied to sound insulation and heat preservation of a floor slab and a preparation method of the aerated concrete aiming at the problems that an existing sound insulation floor slab containing the aerated concrete is poor in structural stability, namely the sound insulation effect and the long-term effect of mechanical properties are poor and the like. Comprising 30-40 parts of fly ash, 25-35 parts of sand, 15-20 parts of ardealite, 10-15 parts of quick lime, 5-8 parts of silicon-aluminum porous microspheres, 3-5 parts of slaked lime, 1-2 parts of Fe3O4-polypropylene fiber and 0.2-0.5 part of aluminum powder. The preparation method of the silicon-aluminum porous microspheres comprises the following steps: mixing a silicon source, an aluminum source and a surfactant, and uniformly stirring to obtain silicon-aluminum homogenate; and adding nano titanium dioxide, carrying out ultrasonic dispersion and freeze drying, transferring into a heating furnace, and heating and calcining to obtain the silicon-aluminum porous microspheres. The supporting and strengthening effects on pores are realized through gas production reaction and the like in the material, so that the structural strength and durability of the aerated concrete are improved.

The invention relates to the technical field of building materials, and particularly discloses interior wall waterproof putty powder and a preparation method thereof. Interior wall water-resistant putty powder is prepared from sulphoaluminate cement, nano heavy calcium powder, silica fume, a double-MOF composite nanotube, modified diatomite, polypropylene fiber, nano titanium dioxide, a defoaming agent, a dispersing agent and a mildew preventive, and the double-MOF composite nanotube is obtained by loading copper trimesic acid in an inner cavity of a halloysite nanotube and loading dimethyl imidazole cobalt on the outer wall of the halloysite nanotube; the modified diatomite is obtained by modifying diatomite with stearic acid. The interior wall waterproof putty powder provided by the invention adopts the double-MOF composite nanotube as a core functional material, and under the synergistic effect of multiple components, the water resistance and air permeability of a putty layer are effectively enhanced.

The invention relates to the related field of composite fibers, in particular to a method for processing composite fibers by compounding polypropylene with silicon dioxide aerogel, which is characterized in that silicon dioxide aerogel powder is uniformly distributed on the surface layer of a polypropylene film through electrostatic adsorption, and film-split fibers are obtained through laminating, drafting, splitting and other processes; the polypropylene fiber and the silicon dioxide aerogel powder are well combined, the defect that the aerogel material cannot be flexibly processed is overcome, processing of the fibrous aerogel material is achieved, and the fiber product can be widely used for manufacturing protective clothing, thermal insulation materials, industrial cloth, filtering materials and the like.

The invention discloses recycled aggregate-based concrete and a preparation method thereof, and belongs to the technical field of concrete preparation. The concrete is prepared from the following raw materials in parts by weight: 250 to 300 parts of cement, 600 to 750 parts of sand, 300 to 400 parts of modified recycled aggregate, 250 to 350 parts of polypropylene fiber, 100 to 200 parts of fly ash, 150 to 200 parts of water, 80 to 100 parts of mineral powder and 3 to 8 parts of water reducing agent. The modified recycled aggregate has fewer internal gaps and higher apparent density, so that the surface structure and density of the modified recycled aggregate are improved; the polypropylene fiber added with the modified glass fiber is more excellent in mechanical property, heat resistance, dimensional stability, corrosion resistance and the like; a mutually cross-linked and supported network structure is formed between the modified recycled aggregate and the polypropylene fiber, so that not only is the connection strength between the polypropylene fiber and a concrete skeleton improved, but also the anti-cracking performance, the compressive strength and the anti-seepage performance of the concrete disclosed by the invention are enhanced.

The invention belongs to the field of light low-carbon concrete, and discloses hydraulic low-carbon concrete containing barium sulfate barite as well as a preparation method and application of the hydraulic low-carbon concrete. The concrete is prepared from 42.5-grade Portland cement, barium sulfate barite powder, modified polypropylene fiber, industrial waste residue lightweight aggregate, boron carbide powder, nano silicon dioxide, a polycarboxylate superplasticizer, a composite exciting agent and water according to specific parts by weight. Wherein the barium sulfate barite powder is subjected to graded proportioning and calcination activation, the modified polypropylene fiber is treated by plasma and a silane coupling agent, the industrial waste residue lightweight aggregate is formed by compounding fly ash ceramsite and steel slag microbeads, and the composite exciting agent is composed of specific components. The concrete is high in compressive strength, low in dry density, excellent in neutron shielding and gamma ray attenuation performance and low in chloride ion diffusion coefficient. The preparation method comprises the steps of premixing modification, gradient stirring, vibration compaction and steam curing. The concrete is suitable for construction of a nuclear reactor containment, a radioactive waste repository and a nuclear medicine protection wall.

The invention relates to the technical field of layered materials, and discloses a light, thin, sweat-guiding and quick-drying double-layer woven fabric with a skin-core structure and a preparation method and application of the light, thin, sweat-guiding and quick-drying double-layer woven fabric. The preparation method of the light, thin, sweat-guiding and quick-drying double-layer woven fabric with the skin-core structure comprises the following steps that functional polyester fibers and polypropylene fibers are blended into skin layer first yarn; the first skin layer yarn is subjected to laser drilling to form a micropore structure, and the pretreated first skin layer yarn is obtained; functional cotton fibers, superfine polyethylene fibers and temperature control fibers are blended into core layer second yarns; the pretreated skin layer first yarn and the core layer second yarn are woven into the light, thin, sweat-guiding and quick-drying double-layer woven fabric with the skin-core structure through the double-layer plain weaving technology. The light and thin sweat-guiding quick-drying double-layer woven fabric with the skin-core structure not only has excellent moisture absorption, sweat releasing and quick-drying performance, lasting antibacterial performance and ultraviolet resistance, but also has the light and thin characteristic, and can be used in the fields of sportswear, outdoor equipment, military protection and the like.