23results about How to "Improves shrink resistance" patented technology

The invention discloses high-flow-state high-strength shrinkage-resistant fluid-state soil and a preparation method thereof, and belongs to the technical field of slurry solidification. The high-flow-state high-strength shrinkage-resistant fluid-state soil is prepared from the following raw materials in percentage by mass: 80 to 95 percent of slurry, 5 to 20 percent of a curing agent and 0.05 to 0.1 percent of slow-release water replenishing microbeads, the curing agent comprises the following raw materials in percentage by mass: 40-70% of mineral powder, 6-15% of cement, 3-10% of lime, 4-10% of fly ash, 4-8% of red mud, 5-15% of anhydrous sodium sulphate, 4-8% of calcium chloride and 0.5-3% of expanded microspheres. The high-flow-state high-strength shrinkage-resistant fluid-state soil has the advantages of high fluidity, high strength, low shrinkage and the like, the technical problems that existing fluid-state solidified soil is large in shrinkage, the fluidity and the strength are not matched and the like are solved, and the practical engineering requirements of the current fluid-state solidified soil can be met.

The invention discloses a solid waste flow-state backfill material and a preparation and performance regulation and control method thereof, and relates to the technical field of green low-carbon geotechnical materials, and the solid waste flow-state backfill material is formed by uniformly stirring a solid waste base material, water and a comprehensive performance regulator. The performance of the solid waste flow-state backfill material is regulated and controlled by changing parameters such as the mix proportion and the water-solid ratio of the solid waste base material, the mixing amount of the recycled fine aggregate and the like, the flow-state backfill material which is controllable in the strength range of 0.6-12 MPa, excellent in working performance and stable in performance can be prepared, the diversified engineering application requirements are met, the engineering cost is reduced, and the economic benefit is increased. And the development goals of low carbon, environmental protection, economy and high efficiency of backfill engineering in the construction field are achieved.

The invention provides bone cement based on nano-microcrystalline cellulose silver-loaded filler and a preparation method and application thereof, and relates to the technical field of artificial restoration preparation, the bone cement comprises the following components: polymethyl methacrylate, a photoinitiator, a diluent, a cross-linking agent, a stabilizer, a developer and nano-microcrystalline cellulose silver-loaded filler, the photoinitiator is used for replacing a self-curing agent, the bone cement is prevented from easily generating a large amount of polymerization heat, and the material can be used for 3D printing; the nano microcrystalline cellulose silver-loaded filler is added, so that the shrinkage rate of the cured bone cement can be reduced, the shrinkage resistance of the bone cement can be improved, the bone cement can be applied to preparation of a bone cement-based restoration, a visual three-dimensional model female die is established on the basis of data of a to-be-restored part, and preparation of an irregular restoration is realized by combining a 3D printing technology; and the matching degree of the prosthesis and the to-be-repaired part is improved. The technical problems that in the prior art, a bone cement-based repairing material generates a large amount of polymerization heat, is serious in shrinkage and cannot be applied to 3D printing are solved.

The invention discloses a series green and environment-friendly mortar formula suitable for northwest climate, and particularly relates to the technical field of mortar, the series green and environment-friendly mortar formula comprises the following components: 100-250 parts of cement, 20-30 parts of attapulgite powder, 20-30 parts of boric sludge, 150-250 parts of natural sand, 10-20 parts of reinforcement powder, 5-10 parts of polysiloxane elastomer, and 2-4 parts of itaconic acid. The prepared mortar is better in breaking strength, corrosion resistance and water resistance, meanwhile, the mortar can be toughened and enhanced, the shrinkage resistance of the mortar is improved, early-stage shrinkage cracking is reduced, then the prepared mortar can effectively slow down the evaporation speed of water, the wettability of the mortar is kept, and the water resistance of the mortar is improved. The mortar prepared by the invention has better weather resistance, can resist strong sunlight, high temperature, low temperature and other extreme weather conditions in northwest regions, keeps the long-term stability and durability of the mortar, and can prevent the mortar from being frozen and damaged under the severe cold weather condition in winter in northwest regions.

The invention provides a negative water pressure radical treatment method for underground structure penetrating crack leakage in a high water pressure environment. The negative water pressure radical treatment method comprises the following steps: carrying out base layer treatment on a to-be-treated base surface; a series of grouting holes are drilled in the two sides of the crack respectively; water stop needle heads are installed in the grouting holes respectively; slurry is injected through the water stop needle head, and the slurry contains a ZJ-III high-molecular elastic plugging agent; reinforced grouting is conducted, and grouting liquid for reinforced grouting is ZJ-V inorganic non-dispersive adaptive grouting liquid; the water stop needle head is dismantled, and the grouting hole is blocked through an X13 high-strength alkali-resistant repairing agent; a V-shaped groove is formed in the crack, and a base plane is subjected to chiseling treatment; the surface of the V-shaped groove is subjected to wetting treatment, and an SK-3 nanometer silicon ion crack repairing modifier is sprayed; blocking the V-shaped groove and paving an X14 composite polymer alkali-resistant fiber sealing layer; and a protective layer is laid after maintenance. The method can fundamentally solve the problem of repeated leakage.

The invention discloses an anti-shrinkage supercritical foaming shoe material composite material and a preparation method thereof, and relates to the field of shoe materials. The anti-shrinkage supercritical foaming shoe composite material comprises 85-90 parts by weight of TPU resin, 10-15 parts by weight of a maleic anhydride grafted modified olefin block copolymer and 1-2 parts by weight of a cell modifier, the cell modifier comprises nano calcium carbonate and calcium phosphate, and the weight ratio of the nano calcium carbonate to the calcium phosphate is (3-4): 1. The anti-shrinkage supercritical foaming shoe material composite material has the advantage that the shrinkage rate is reduced, the size stability can be kept after long-time storage, meanwhile, the excellent compression permanent deformation resistance and tear resistance are achieved, the use experience of a user can be improved, and the service life of the supercritical foaming shoe material composite material is prolonged.

The application discloses a steel structure concrete composite structure and a construction method thereof. The construction method is that concrete mixed with shape memory alloy fiber aggregate is poured into a cavity of a steel structure to form the steel structure concrete composite structure. The application can improve the crack resistance and shrinkage resistance of the concrete structure, avoid crack generation and internal cavity hollow caused by concrete shrinkage, and thus improve the forming quality of the steel structure concrete composite structure and the overall bearing capacity and durability of the steel structure concrete composite structure.

The invention relates to the technical field of separation, and relates to chelate resin for removing calcium and magnesium ions in water as well as a preparation method and application of the chelate resin. The chelate resin for removing calcium and magnesium ions in water provided by the invention is composed of the matrix resin and the modified group, and the introduction of the modified group improves the adsorption capacity and stability of the matrix resin to the calcium and magnesium ions, and can respectively reduce the concentrations of calcium ions and magnesium ions in high-salt sewage to 0.5 ppm or below. And the capacity is still kept at 85% or above after 15 times of recycling, so that the sewage treatment cost is greatly reduced, and the method has a wide application prospect.

The invention provides an anti-crack and anti-impact UHPC (Ultra High Performance Concrete) board based on decoration wastes and a preparation method of the anti-crack and anti-impact UHPC board based on the decoration wastes. Comprising the following components: 120-200 parts of ordinary Portland cement, 60-80 parts of slag, 60-90 parts of decoration waste micro powder, 200-300 parts of decoration waste aggregate, 20-40 parts of steel fiber, 4-8 parts of waste fiber, 8-15 parts of an expanding agent, 3-6 parts of a water reducing agent and 50-60 parts of water. The anti-cracking and anti-impact UHPC board based on the decoration waste has the advantages of being high in strength, high in early strength development rate, good in anti-cracking and anti-impact performance and the like, all components in the decoration waste are fully utilized, the use amount of cement is greatly reduced, production carbon emission is reduced by about 50% compared with a traditional UHPC board, cost is low, sources are wide, and the anti-cracking and anti-impact UHPC board is suitable for industrial production. The method has good environmental and economic benefits, is suitable for large-scale popularization and industrial production, and has positive significance in promoting sustainable development of the building industry.

The invention discloses a preparation method of anti-shrinkage carbon fiber reinforced plastic, and relates to the technical field of plastic. The ultra-high molecular weight polyethylene and the polypropylene are interpenetrated and entangled to form a microscopic interlaced network, so that the matrix achieves anti-shrinkage and anti-creep effects, in the blending process, two molecular chains tend to be directionally arranged under the action of a tensile flow field, and therefore the matrix is enhanced, and as the action time of the force field is prolonged, the anti-shrinkage and anti-creep effects are achieved. The nano silicon dioxide is used for filling, so that the base body realizes an anti-oxidation effect and an anti-shrinkage effect is enhanced; the preparation method comprises the following steps: firstly, preparing nano silicon dioxide, reinforcing creep resistance and shrinkage resistance of a matrix by using a carbon fiber net, then activating carbon fibers by irradiation, carrying out a bonding reaction with the nano silicon dioxide, coating a polymer, and carrying out irradiation and cross-linking on the polymer again, so that the matrix forms a denser structure, and finally, carrying out annealing treatment to reinforce cross-linking and improve the shrinkage resistance, creep resistance and oxidation resistance effects.

The present application relates to the field of polymer materials, and specifically discloses a TPE corner material with high bonding strength and a preparation method thereof; a TPE corner material with high bonding strength, comprising a styrene elastomer, a chlorinated polypropylene compound, a tackifying resin, a filler, a filling oil, polypropylene, a lubricant, a pigment, a foaming agent, and other additives; the preparation method thereof is as follows: the filling oil is blended with the styrene elastomer and recorded as filler 1 and filler 2 respectively; the filler 1, the chlorinated polypropylene compound, the tackifying resin, the filler, polypropylene, the pigment, the lubricant, and other additives are blended to obtain a mixture 1; the filler 2 and the foaming agent are mixed evenly to obtain a mixture 2; the mixture 1 is fed through a main feeding port, the mixture 2 is fed through a side feeding port, and the mixture is extruded and granulated to obtain TPE corner material particles; and the invention has the advantages of high bonding strength, smooth surface, no shrinkage marks, and high processing efficiency.

The utility model relates to the technical field of sealing element, especially a sealing element for hydrogen storage equipment, comprising: a flange plate, a center through hole for hydrogen gas conveying is set up in the center of flange plate, one side of flange plate is used for fixedly connecting hydrogen storage equipment pipeline, the other side is provided with annular abutment wall, the side provided with abutment wall is used for connecting the side provided with abutment wall of the flange plate on the other hydrogen storage equipment pipeline, annular sealing groove is set up on abutment wall, two sealing grooves of two flange plates butt joint share a sealing washer, the sealing washer comprises a center metal ring and two sealing rings, two sealing rings are arranged at both ends of center metal ring respectively, and the overall width of sealing washer is greater than the depth of a sealing groove. The sealing element for hydrogen storage equipment can continuously maintain good sealing effect.

The invention relates to the technical field of cement mortar, in particular to cement mortar suitable for summer high-temperature construction and a preparation method thereof. The cement mortar is prepared by the preparation method. The preparation method comprises the following steps: preparing dry powder and mixed liquid; the mixed solution comprises the following raw material components in parts by weight: 0.5-2 parts of a water reducing agent, 1-3 parts of a water retaining agent, 0.2-6 parts of a retarder and 60-110 parts of water; wherein the retarder comprises at least one of white sugar and sodium gluconate; uniformly mixing the raw material components in the mixed solution to obtain the mixed solution; and uniformly mixing the dry powder with the mixed solution to obtain the cement mortar suitable for high-temperature construction in summer. The prepared cement mortar can prolong the setting time, reduce the shrinkage rate of the cement mortar, reduce the cracking risk and enhance the compressive strength and shrinkage resistance of the cement mortar.

The present application provides a shrink-proof treatment method of cashmere fibers, and relates to the field of textile fiber treatment technology, which comprises the following steps: step 1, plasma pretreatment; step 2, composite enzymatic hydrolysis treatment; step 3, high molecular grafting treatment; step 4, cross-linking and curing treatment; and step 5, finishing treatment. The composite enzyme solution comprises papain, laccase, alkaline pectinase and sodium bisulfite. The present application provides a shrink-proof treatment method of cashmere fibers. Through the four-step composite process of plasma activation, composite enzymatic hydrolysis, biological high molecular grafting and cross-linking and curing, the directional friction effect of the scales of the cashmere fibers is weakened, a stable biocompatible protective layer is formed, the shrink-proof effect and the natural performance of the fibers are synergistically optimized, the preparation method of the core material, the equipment parameters and the process details are clearly defined, and the technical scheme is repeatable and controllable in industrial safety.

This invention discloses a dual-effect concrete internal curing agent that combines shrinkage resistance and reinforcement, and its preparation method. Belonging to the field of building materials technology, the internal curing agent is composed of 100 parts phosphoric acid, 100 parts calcium hydroxide, 15-30 parts anionic or nonionic polyacrylamide, 20-30 parts sodium polyacrylate, 20-40 parts maleic anhydride (MA), 20-40 parts hydroxypropyl methylcellulose, 50 parts amorphous nano-silica particles with an average particle size of 20-50 nm, 5 parts defoamer, and 800 parts deionized water. In preparation, calcium hydroxide is first dissolved in water, then phosphoric acid is added and reacted at 60-80℃ until the pH value reaches 5.5-6.5. Then, nano-silica particles are added sequentially for dispersion, followed by HPMC and PAM, and stirring to obtain the final product. This invention effectively inhibits concrete shrinkage through the synergistic effect of organic polymers, inorganic minerals, and nanomaterials. The 60-day drying shrinkage rate is reduced by up to 77.25%, and the compressive strength is increased by 9.57%. As a water-based preparation, it can be directly incorporated into concrete and is suitable for natural curing in high-altitude and plateau regions.

The present invention belongs to the technical field of cement materials, and specifically relates to an ANF / CNT gel powder modified cement paste material. A method combining alkali solution modification and ultrasonic treatment is adopted to add carbon nanotubes to an aramid nanofiber dispersion liquid. Under the action of ultrasound, the gradually dispersed modified carbon nanotubes can effectively isolate and disperse the aramid nanofibers prepared by the alkali / DMSO soaking method, so that the carbon nanotubes and the aramid nanofibers are entangled with each other to form an interpenetrating network gel structure. Through the mutual cross-penetration and mechanical entanglement between the carbon nanotubes and the aramid nanofibers, the interpenetrating network structure can improve the mechanical strength of the material and enhance its ability to resist external forces. Moreover, the interpenetrating network structure of carbon nanotubes and aramid nanofibers can form a high-density interface between the fibers, and on the basis of further improving the porosity of the gel, its water release shrinkage is improved, the stability of the gel structure is promoted, and the improvement of the mechanical properties and shrinkage resistance of the cement is achieved.

The present invention provides a polyethylene composition and a biaxially stretched film comprising the thereof, the composition having excellent mechanical properties and tensile stability, as well as excellent film processability and production efficiency, and is suitable for producing biaxially stretched films with high shrinkage resistance, printability and transparency.

The invention discloses a low-shrinkage TPU (thermoplastic polyurethane) floor and a preparation method thereof, and belongs to the technical field of TPU floors. Comprising a TPU surface layer and a TPU bottom layer, the TPU surface layer comprises a TPU main material and a PBS ingredient, and the content of the PBS ingredient in the TPU surface layer is 20-25%; the TPU bottom layer comprises a TPU main material and a PBS (Phosphate Buffer Solution) ingredient, and the content of the PBS ingredient in the TPU bottom layer is 40-45%; the thickness ratio of the TPU surface layer to the TPU bottom layer is 3: 2; the TPU surface layer and the TPU bottom layer are integrally manufactured through a hot-press forming machine; pBS precipitation processing of the TPU surface layer and the TPU bottom layer is completed before hot press molding of the TPU surface layer and the TPU bottom layer, and during processing, the TPU surface layer and the TPU bottom layer are fed into a processing roller row. According to the low-shrinkage-rate TPU floor and the preparation method thereof, PBS ingredients serve as a rigid framework supporting system in the TPU floor, the TPU floor can have the excellent characteristics of itself, and meanwhile, the TPU surface layer and the TPU bottom layer are not prone to falling off; the low shrinkage rate of the TPU floor can be reduced, and meanwhile the structural strength of the TPU floor can be improved.

The utility model discloses a shrink-resistant sewing thread, belongs to the technical field of sewing threads, and solves the problems that cotton sewing threads are basically processed through technological means in the prior art, then shrinkage possibly brought by the cotton sewing threads in the follow-up process is reduced, and shrink-resistant adjustment on the cotton sewing threads cannot be carried out from the perspective of a physical structure. Comprising a sewing thread body, and the sewing thread body comprises a main core thread, a plurality of groups of split strips and an inner short fiber layer; the main core wire is made of a chemical fiber material; the plurality of groups of sectioning strips are fixedly connected to the outer ring of the main core wire, clamping areas are formed between the adjacent groups of sectioning strips, and the sectioning strips are also made of chemical fiber materials; and the inner short fiber layer is adhered to the outer sides of the main core wire and the plurality of groups of split strips. According to the sewing thread, the main core thread and the sectioning strip structure are combined with the cotton short fiber inner layer and the cotton short fiber outer layer, comfortable touch feeling is kept, and meanwhile the chemical fiber shrink-resistant characteristic is achieved. The reinforcing layer is wrapped outside to enhance the tensile strength, even if the cotton layer shrinks, the cotton layer can resist and improve the shrink resistance, and no extra process is needed.

The invention relates to a prestressed concrete beam preparation method, which comprises: S1, mixing and stirring cement, fly ash, fine aggregate and coarse aggregate to obtain a dry material; s2, mixing nano silicon dioxide, natural zeolite and water, and performing ultrasonic dispersion to obtain dispersion liquid; mixing and stirring the dry material and the dispersion liquid to obtain a wet material; s3, adding a water reducing agent into the wet material, and stirring to obtain concrete slurry; s4, the concrete slurry is poured into a post-tensioned prestressed concrete beam mold, then primary curing is conducted, a concrete beam blank is obtained, and the curing temperature ranges from 35 DEG C to 55 DEG C; after prestress is applied to the concrete beam blank, a prestressed concrete beam blank is obtained; and S5, the prestressed concrete beam blank is subjected to secondary curing at the curing temperature of 40-65 DEG C, and the prestressed concrete beam is obtained after curing. The problems that in the prior art, a concrete beam deforms and cracks more after being used for a long time, the early strength of the concrete beam is increased slowly, and the cost of the concrete beam is too high are solved.

The invention provides an application method of a cashmere fancy yarn in a coarse wool fabric, which comprises the following steps: step 1, yarn preparation, step 2, preparation of a cashmere fiber form stabilizing additive, step 3, yarn pretreatment, step 4, additive immersion treatment, step 5, drying and cross-linking reaction, step 6, spinning and weaving, and step 7, heat setting treatment. Step 8, performing post-treatment and flexibility adjustment; according to the method, the performance of the final fabric is remarkably influenced by the designed ratio of additives, dipping treatment conditions, parameters of drying and cross-linking reaction and the like, and different yarn preparation processes (ring spinning or air jet spinning) and weaving density can influence the texture and layering sense of the fabric; the shrink resistance, thermal stability and softness of the cashmere fancy yarn are effectively enhanced, and the knitting efficiency and quality of the fabric are improved.

The invention discloses a defoaming agent for well cementation cement and a preparation method of the defoaming agent, and belongs to the technical field of cement additives. The defoaming agent for the well cementation cement is prepared from the following raw materials: an emulsifier, a defoaming auxiliary agent, a thickening agent, a dispersing agent, inorganic filler and water, the modified nano silicon dioxide is obtained by heating and polymerizing silane modified nano silicon dioxide and N-vinyl-N-methylacetamide under the initiation of an initiator; the defoaming auxiliary agent polyether modified silicone oil is obtained by adding allyl polyoxyethylene methyl terminated polyether into phenylmethyl silicone oil, (2S)-3-(o-allyloxyphenoxy)-1, 2-epoxypropane and n-decanol under the catalysis of chloroplatinic acid and carrying out a heating reaction on the phenylmethyl silicone oil, the (2S)-3-(o-allyloxyphenoxy)-1, 2-epoxypropane and the n-decanol and the allyl polyoxyethylene methyl terminated polyether. The polyether modified silicone oil and the polysilane modified silicon dioxide are simultaneously used as the defoaming agent in the cement, so that the synergistic enhancement of the defoaming effect can be realized, the shrinkage resistance and the impermeability of the cement paste can be improved, and the effect and the efficiency of well cementation operation are optimized.

The invention discloses a preparation process of high-performance concrete and application of the high-performance concrete in a building structure. The high-performance concrete is prepared from the following components in parts by weight: 330 to 350 parts of cement, 70 to 80 parts of fly ash, 90 to 100 parts of slag powder, 2 to 3 parts of a water reducing agent, 550 to 600 parts of fine aggregate, 850 to 900 parts of coarse aggregate, 20 to 50 parts of a fiber material, 20 to 30 parts of a shrinkage reducing agent and 160 to 180 parts of water. By adjusting the proportion of all the components in the high-performance concrete, the prepared concrete has good compressive strength and breaking strength, cracks are not prone to being generated, and the application of the concrete in building structures is expanded.