618 results about "Polypropylene fiber" patented technology

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 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 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 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 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 discloses high-strength durable pervious concrete and a preparation method thereof, and belongs to the technical field of building materials. The concrete is prepared from the following raw materials in parts by weight: 160 to 220 parts of cement, 1200 to 1600 parts of coarse aggregate, 170 to 230 parts of fine sand, 160 to 200 parts of water, 3 to 4.5 parts of polycarboxylate superplasticizer, 5 to 15 parts of silica fume, 1 to 3 parts of polypropylene fiber, 8 to 12 parts of modified nano cellulose and 5 to 7 parts of flexibilizer, wherein the flexibilizer comprises modified graphene oxide, propylene glycol monomethyl ether and polyisoprene rubber. The interface compatibility is enhanced through the modified nanocellulose, microcracks are reduced, the bonding strength of aggregate and cement is improved, and the compressive strength is improved; the toughening agent component endows the concrete with toughness and durability, the toughening agent component and the toughening agent component have a synergistic effect, and the concrete prepared by mixing the various raw materials has excellent mechanical properties and durability on the basis of good water permeability, and has a wide market application prospect.

The invention relates to the technical field of building materials, and discloses ultra-high-performance concrete for buildings and a preparation method of a concrete plank. The ultra-high-performance concrete comprises the following components: 600-850 parts of a cementing material; 150 to 200 parts of silica fume; fine aggregate: 300 to 360 parts of coarse aggregate; 5 to 20 parts of synthetic anti-crack fiber; additives: 15-35 parts of a polycarboxylic acid high-performance water reducing agent and 0.5-3 parts of a defoaming agent; 5 to 15 parts of titanium dioxide; and 150 to 200 parts of water. The ultrahigh-performance concrete is prepared from ordinary Portland cement, silica fume, quartz sand aggregate, polypropylene fibers, a polycarboxylic acid high-performance water reducing agent, a defoaming agent, titanium dioxide and water, and nano silicon dioxide and a slow-release antibacterial agent are added, so that the ultrahigh-performance concrete with high toughness, high stability, high adaptability, high compressive strength, high flowability and antibacterial performance is obtained.

The application discloses a light-weight moisture-conducting functional fabric and a preparation method thereof, and relates to the technical field of textiles.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 cross-section fibers, and the outer layer is obtained by blending modified polypropylene fibers and hollow polyester fibers; the modified polypropylene fibers are obtained by melting and spinning the mixture of polypropylene chips and modified jade powder and then stretching; the prepared fabric not only has the characteristics of light weight and one-way moisture-conducting capability, can quickly discharge sweat outside the body, realizes dry and cool isolation between the skin and the outside world, and has multiple health protection functions such as persistent antibacterial property, efficient ultraviolet resistance and contact cool feeling.

The invention relates to the technical field of fiber materials, in particular to a polydopamine modified polypropylene antistatic fiber and a preparation method thereof. The antistatic polypropylene fiber overcomes the problems of poor antistatic effect and mechanical property of the polypropylene fiber. The preparation method comprises the following steps: carrying out step-by-step mixing, melt extrusion, spinning, drafting and heat setting on raw materials such as polypropylene slices, polydopamine modified polypropylene, carbon nanotubes, modified titanium dioxide, modified graphene and the like to obtain the antistatic fiber. The polydopamine modified polypropylene is obtained by modifying polypropylene with dopamine hydrochloride; the modified titanium dioxide is obtained by modifying nano titanium dioxide by using 3-aminopropyltriethoxysilane; the modified graphene is obtained by sulfonating graphene oxide and adding octadecylamine for modification. All the materials and the process cooperate with each other, an antistatic system is constructed on the surface and in the fiber, and meanwhile the mechanical property is improved. The fiber prepared by the method is excellent in antistatic effect and mechanical property, and has a good application prospect.

The present invention describes an electrical insulation material comprising syndiotactic polystyrene, beta-polypropylene particles, and / or beta-polypropylene fibers. Furthermore, an electronic component comprising at least one electrical insulation material according to the present invention and the use of the electrical insulation material are disclosed.

The invention relates to the technical field of concrete crack repairing, and particularly discloses a quick-hardening concrete crack repairing agent and a preparation method thereof. The invention relates to a quick-hardening concrete crack repairing agent, which is prepared from the following raw materials: 45 to 55 parts of sulphoaluminate cement; 10 to 15 parts of silica fume; 12 to 18 parts of metakaolin; 5-8 parts of a bimetallic composite seed crystal; 10 to 15 parts of double-layer shell nano anhydrite; 2-4 parts of magnesium oxide; 0.5 to 1 part of polypropylene fiber; 0.5 to 0.8 part of a water reducing agent; 15 to 20 parts of water; the bimetallic composite seed crystal is a zirconium and strontium element co-doped composite crystal nucleus; the double-shell nano anhydrite is composed of an inner core nano anhydrite, a middle aluminum sulfate early strength phase and an outer mesoporous SiO2 shell. The quick-hardening concrete crack repairing agent has the advantages of being short in setting time, high in early strength and excellent in interface bonding performance.

The invention relates to the technical field of fibers, in particular to a controlled-release anti-aging polypropylene fiber and a preparation method thereof. The fiber is prepared from polypropylene homopolymer resin, a reaction type interface layer master batch and a controlled release anti-aging master batch, the reactive interface layer master batch is formed by reacting and extruding maleic anhydride modified polypropylene and 3-aminopropyl terminated polydimethylsiloxane, so that the interface compatibility is enhanced; the controlled-release anti-aging master batch contains hydroxyl and peracetylated cyclodextrin grafted siloxane carriers, and an ultraviolet absorbent, a light stabilizer and an antioxidant are included, so that the controlled release of an anti-aging agent is realized. The preparation method comprises the steps of master batch preparation, final mixing granulation, melt spinning and drafting setting. The fiber strength is remarkably improved, the boiling water shrinkage rate is reduced, the strength retention rate after ultraviolet aging reaches 93% or above, the yellow index change is small, and the outdoor service life is prolonged.

The application discloses a polymer repair mortar for marine concrete and a preparation method thereof. The polymer repair mortar comprises dry powder mortar and a composite modified polymer. The dry powder mortar comprises 525 cement, an expanding agent, high-activity metakaolin, sand, a water reducing agent, a defoaming agent, latex powder and modified polypropylene fibers. The composite modified polymer comprises water-based epoxy resin, graphene, sodium hydroxymethyl cellulose and amide modified hydrogenated castor oil. The dry powder mortar and the composite modified polymer are mixed uniformly to obtain the polymer repair mortar. The polymer repair mortar improves the impermeability and impact resistance of the repaired marine concrete. The composite modified polymer can form a dense waterproof protective film on the surface of the mortar, effectively reducing the influence of the dry-wet cycle of the sea, chloride ion corrosion and the impact of sea waves. In addition, the adhesion between the repair mortar and the marine concrete matrix is further improved.

The invention relates to the technical field of mortar materials, in particular to concrete antirust mortar and a preparation method thereof. The concrete antirust mortar is prepared from the following components in parts by weight: 35 to 45 parts of Portland cement, 10 to 20 parts of sulphoaluminate cement, 2 to 4 parts of a composite antirust agent, 1 to 3 parts of redispersible latex powder, 1 to 3 parts of silica fume, 2 to 4 parts of fly ash, 45 to 55 parts of quartz sand, 0.1 to 0.3 part of polypropylene fiber, 2 to 6 parts of modified polyurethane, 0.5 to 1.0 part of a water reducing agent, 0.1 to 0.2 part of a retarder, 0.3 to 0.5 part of a de-foaming agent and 15 to 25 parts of water. The concrete anti-rust mortar prepared by the invention has excellent waterproof performance, penetration resistance and chemical corrosion resistance, and can effectively inhibit the occurrence of corrosion of steel bars, thereby prolonging the service life and enhancing the durability of the steel bars.

The invention discloses a high-altitude tunnel lining concrete damage self-repairing material and a preparation method thereof, and the self-repairing material is prepared by doping a microcapsule and a conductive filler in a specific proportion into a traditional concrete matrix, the concrete comprises the following components: cement, fine aggregate, coarse aggregate, water, microcapsules I, microcapsules II, nano silicon dioxide, silica fume, carbon fibers and polypropylene fibers. According to the invention, a dual repairing system of the microcapsule I and the microcapsule II is innovatively adopted. The microcapsule I can repair large cracks (the width is larger than or equal to 0.2 mm), and the microcapsule II aims at small cracks (the width is smaller than 0.2 mm). The dual mechanism ensures comprehensive repair of cracks with different sizes, effectively prevents invasion of moisture and harmful substances, and remarkably improves the durability of the concrete. The microcapsule can be rapidly broken and release the repairing agent when the crack is generated, and the repairing agent can be cured in a short time, so that the crack is effectively prevented from further expanding, and the risk of structural damage is reduced.

The invention relates to an early strength concrete material for an expansion joint anchoring area and a preparation method thereof, and relates to the technical field of building materials, the early strength concrete material for the expansion joint anchoring area comprises the following components in parts by mass: gel master batch, coarse aggregate, fine aggregate, silica fume, mineral powder and a polycarboxylic acid water reducer; the gelling master batch is prepared from the following components in parts by mass: tricalcium silicate, anhydrous calcium sulphoaluminate, polyvinyl alcohol, polypropylene fiber and water; the preparation method comprises the steps of gelling master batch preparation, shearing and flaking, and mixing and forming. According to the early-strength concrete material for the expansion joint anchoring area and the preparation method of the early-strength concrete material, the concrete in the anchoring area is modified by using an organic matter as a crystal nucleus, so that a compact and ordered organic-inorganic cross-linked structure with a biomimetic structure is formed, and the early-strength performance and tensile toughness of the concrete are remarkably improved.

The invention relates to anti-crack expansive concrete and a preparation method thereof, and relates to the technical field of building materials. The concrete is prepared from the following components in parts by mass: Portland cement, fly ash, slag powder, silica fume, an expansion composition, nano calcium carbonate, sand, gravel, water, a hydration temperature rise inhibitor, a polycarboxylic acid water reducer and carboxyl modified polypropylene fibers. The preparation method comprises the steps of primary mixing and final mixing. According to the anti-crack expansive concrete disclosed by the invention, the hydration temperature rise inhibitor is added to reduce hydration heat, meanwhile, the early-stage and short-term strength is improved, and the early-stage and short-term strength loss caused by temperature cracks generated by reduction of the hydration heat is avoided.

The invention belongs to the technical field of concrete, and particularly relates to porous concrete as well as a preparation method and application thereof. The porous concrete is prepared from the following raw materials in parts by mass: 100 parts of Portland cement, 5 to 15 parts of silica fume, 140 to 160 parts of gravel, 10 to 20 parts of steel slag, 30 to 50 parts of sand, 0.8 to 1.5 parts of polycarboxylic acid water reducing agent, 8 to 15 parts of mixed resin, 0.3 to 0.8 part of water repellent, 0.9 to 1.2 parts of modified polypropylene fiber and 45 to 60 parts of water. The porous concrete disclosed by the invention is high in compressive strength, good in water permeability and strong in durability, and is particularly suitable for road engineering in high and cold, high-humidity and heavy traffic areas in China.

The application provides a moisture-absorbing and heat-generating wool blended knitting yarn and a preparation method thereof, and belongs to the field of textile technology. Bamboo pulp fibers, modified polypropylene fibers, cotton fibers and modified wool fibers are sequentially subjected to the processes of grabbing, mixing, opening, feeding, rolling, carding, drawing and roving in a mass ratio of 20 / 30 / 20 / 20 to obtain the moisture-absorbing and heat-generating wool blended knitting yarn. The moisture-absorbing and heat-generating wool blended knitting yarn prepared by the application has the advantages of low cost, simple preparation method, good durability, anti-static performance, moisture absorption, sweat discharge, quick drying, antibacterial property, heat generation, warmth retention, aging resistance and the like, and has a wide application prospect.

The invention belongs to the technical field of polypropylene fibers, and provides a halogen-free flame-retardant polypropylene fiber and a preparation method thereof, the polypropylene fiber comprises the following raw materials by weight: 100 parts of polypropylene, 14-24 parts of modified ammonium polyphosphate, 4-10 parts of polyol, 3-6 parts of modified magnesium hydroxide, 3-5 parts of a compatilizer, and 0.1-1 part of an antioxidant. The preparation method comprises the following steps: weighing the raw materials in parts by weight, stirring, uniformly mixing, putting into a double-screw extruder, carrying out melt blending, granulating, carrying out melt spinning, drafting, carrying out heat setting and winding to obtain the halogen-free flame-retardant polypropylene fiber. The intumescent composite synergistic modified magnesium hydroxide flame-retardant system is low in toxicity, low in smoke and environment-friendly, the flame-retardant property can meet the requirement of a product on flame retardance, and the environment-friendly functional polypropylene fiber is prepared and has good application value in indoor decorations such as carpets and curtains.

The invention relates to the technical field of polypropylene fibers, in particular to a high-strength polypropylene fiber and a preparation method thereof. The problems that in the prior art, polypropylene fibers are low in strength and poor in temperature resistance are solved. The preparation method comprises the following steps: respectively prefabricating master batches through silane coupling agent modified nano titanium dioxide and carboxylated multi-walled carbon nanotubes, carrying out melt blending on the master batches, isotactic polypropylene, ultra-high molecular weight polypropylene, a liquid crystal polymer, a beta-nucleating agent and the like, and combining a double-region cooling process under high-speed spinning and two-stage temperature difference drafting to obtain the high-strength polypropylene fiber. According to the method, hierarchical dispersion and interface strengthening of nano components in a polypropylene matrix are achieved, the molecular chain orientation degree and crystallization regularity of the fiber are remarkably improved while good processability is maintained, and finally the performance of the polypropylene fiber is greatly improved.

The invention discloses an industrial solid waste based cementing material preparation and goaf subsequent filling application method, and belongs to the technical field of industrial solid waste resource utilization. 28.1 to 32.3 parts of granulated blast furnace slag and 11.3 to 14.2 parts of fly ash are used as core base materials, 19.2 to 22.8 parts of 42.5-grade cement, 3.2 to 3.8 parts of desulfurized gypsum and 2.3 to 2.7 parts of quick lime are used as auxiliary raw materials, and 0.15 to 0.20 part of polypropylene fiber is used as a modifier. The preparation method comprises the following steps: grinding the raw materials, carrying out drying pretreatment at 105 DEG C, carrying out dry mixing for 5 min according to a mass ratio until the components are uniform, adding 26.3-30.7 parts of water, and carrying out wet mixing for 5 min to prepare a cementing material slurry; synchronously preparing subsequent filling fine-grain industrial solid waste slurry, determining the mixing ratio of the two, mixing the slurry, and injecting the mixed slurry into a goaf through a ground grouting pump to complete subsequent filling. The 28d compressive strength of the cementing material reaches 55.6 MPa and is improved by 30.8% compared with pure cement, the fluidity of the cementing material is 190 mm, the cementing material is suitable for pumping, the cement replacement rate is 80%, the cost is reduced by 32% or above, the consumption of industrial solid waste per ton is larger than or equal to 0.85 ton, cooperation of industrial solid waste recycling and safe goaf filling is achieved, and the cementing material is suitable for high-humidity and complex-stress working conditions.

The invention discloses road and bridge anti-heavy load concrete and a preparation method thereof, relates to the technical field of concrete technology, and belongs to the patent classification number C04B28 / 00. The preparation method of the concrete comprises the following steps: firstly, impregnating and activating polypropylene fibers with a potassium permanganate acid solution, then treating with aminopropyltriethoxysilane to obtain interface modified fibers, preparing a suspension from the interface modified fibers, mixing with a premixed solution of nano silicon dioxide containing a water-borne epoxy resin emulsion, and reacting to obtain a fiber reinforced composite material; the preparation method comprises the following steps: mixing metakaolin and silica fume, adding waterborne polyurethane and carboxylated multi-walled carbon nanotubes, carrying out high-speed shearing, carrying out spray drying to obtain interface reinforced microspheres, carrying out dry mixing on cement, machine-made sand, granite gravel, mineral powder and a fiber reinforced material, adding a polycarboxylic acid water reducer solution, carrying out high-speed stirring, adding the microspheres, and carrying out medium-speed stirring to obtain the concrete. The concrete prepared by the invention has excellent mechanical strength, so that the heavy load resistance is realized.

The utility model discloses a special concrete structure for terrace crack resistance, which comprises a concrete base layer, a concrete strengthening layer is arranged on the upper surface of the concrete base layer, polypropylene fibers are arranged in the concrete strengthening layer, the polypropylene fibers are uniformly distributed, and the polypropylene fibers are arranged in the concrete strengthening layer. A cement-based interface agent coating is arranged on the upper surface of the concrete strengthening layer, a concrete surface layer is arranged on the upper surface of the cement-based interface agent coating, steel fibers are arranged in the concrete surface layer and are uniformly distributed, and a carborundum wear-resistant coating is arranged on the upper surface of the concrete surface layer. By arranging the bottom bars, the surface bars, the polypropylene fibers, the steel fibers and the like, the tensile property and the crack resistance of the concrete structure are improved, and cracks are effectively reduced; by arranging the water pipes, the expansion joints and the expansion reinforcing belts, the anti-cracking effect is further enhanced, the service life of the terrace is prolonged, and the structural stability and practicability are improved.

The utility model provides a concrete structure crack prevention device which comprises a base layer, the base layer is a macadam base layer with high bearing capacity, an elastic isolation layer is arranged on the upper surface of the base layer, an anti-crack fiber net is arranged on the upper surface of the elastic isolation layer, a concrete layer is poured on the anti-crack fiber net, and a temperature control assembly is arranged at one end of the base layer. And a temperature sensor is arranged in the concrete layer. The elastic isolation layer made of the high-elasticity material polyurethane is arranged on the base layer and can be used for forming physical isolation when the concrete layer is poured, direct contact between the concrete layer and the base layer is reduced, and therefore cracks caused by unevenness or shrinkage difference of the base layer are reduced; and then the anti-crack fiber net made of high-strength and high-toughness polypropylene fibers is laid on the upper surface of the elastic isolation layer, so that the tensile strength of the concrete can be enhanced, and cracks formed under the action of external force can be effectively resisted.

The invention relates to the field of well drilling, in particular to a cleaning method and cleaning slurry.The cleaning method comprises the steps that cleaning slurries with different viscosities are pumped in through a slurry pump to conduct circulating cleaning on a borehole, and the cleaning process of each circulating period sequentially comprises the three stages of thick slurry cleaning, thin slurry cleaning and thick slurry cleaning, the thick slurry is clean slurry with the Markov funnel viscosity of 300-800, and the thin slurry is clean slurry with the Markov funnel viscosity of 80-200 s. The cleaning slurry takes well slurry as base slurry and comprises sulfonated lignite, polypropylene fibers, high-softening-point emulsified asphalt, 800-mesh superfine calcium, 1200-mesh superfine calcium, polyanionic cellulose and 2500-mesh superfine calcium. The process is simple, the flushing and carrying effects on rock debris and falling blocks of different sizes are good, and the consumption of cleaning liquid is small.

The present application relates to a kind of preparation methods of anti-cracking waterproofing agent suitable for cold region long distance water tunnel lining, belong to concrete additive technical field.The present application grafts hydrophobic organosilicon segment to the surface of nano-aluminum oxide, and the reaction of thiol-modified polypropylene fiber and thiol-modified chondrites fibrite fiber is carried out through the epoxy group of the surface grafting of nano-aluminum oxide, to obtain aluminum oxide fiber composite, can nano-aluminum oxide, chondrites fibrite fiber and polypropylene fiber are bonded together by hydrophobic long chain, improve the binding force between three.Using the anti-cracking waterproofing agent including aluminum oxide fiber composite in concrete, long-chain silicon oil segment between nano-aluminum oxide, chondrites fibrite fiber and polypropylene fiber and the tannin acid polymer on the surface of polypropylene fiber can give aluminum oxide fiber composite certain elasticity, improve the anti-cracking property and frost resistance grade of concrete.

The utility model relates to the technical field of polypropylene filament cleaning, in particular to an automatic polypropylene filament cleaning device which comprises a rack, a cleaning box, a box cover, a driving assembly, a lifting driving part, a fan heater, a spraying pipe and a water storage tank, a feeding roller and a winding roller are arranged on the rack, and a motor A for driving the winding roller to rotate is arranged on the rack. The cleaning box is connected with the machine frame, two grooves are symmetrically formed in the cleaning box, and a guide roller is rotationally arranged in each of the grooves in the two sides. The box cover is rotationally connected with the cleaning box, a support is arranged on the box cover and slidably connected with a sliding frame, the sliding frame penetrates through the box cover, and the end, inserted into the cleaning box, of the sliding frame is rotationally connected with a pressing roller. The driving assembly drives the pressing roller to rotate. The lifting driving piece drives the sliding frame to lift. And the fan heater is connected with the box cover. And the spraying pipe is connected with the box cover. A water pump is arranged on the water storage tank and communicated with the spraying pipe and the water storage tank. According to the polypropylene fiber cleaning device, polypropylene fibers are brushed through reverse rotation of the compression roller, the polypropylene fibers are washed through the spraying pipe, and the cleaning efficiency is improved.