200results about How to "Small shrinkage" patented technology

The present invention relates to the technical field of photovoltaic power equipment, and discloses a photovoltaic grid-connected cabinet, including a cabinet support and an outer shell, wherein a plurality of breathing plates are fixedly installed inside the cabinet support, and the plurality of breathing plates divide the inner cavity of the cabinet support into different installation chambers, and the breathing plate includes a base plate and a plurality of heat-conducting blocks, wherein the plurality of heat-conducting blocks are embedded in the inner surface of the base plate, and a flow guide pipe is embedded inside the base plate, and the flow guide pipe passes through the heat-conducting block and is fixedly connected, and a plurality of heat-conducting blocks are connected in series, and a breathing cavity is opened inside the heat-conducting block. The photovoltaic grid-connected cabinet adopts a breathing plate as a cabinet partition, and the opening and closing of the breathing cavity can be adjusted by controlling the expansion and contraction of a telescopic ball, so that the grid-connected cabinet not only has the function of blocking external dust and high temperature, but also has the function of one-way ventilation and heat dissipation. Since a monitoring component is arranged inside the breathing plate, the grid-connected cabinet has the function of discharging internal hot air nearby, reducing heat dissipation energy consumption, and being more environmentally friendly.

The utility model discloses an insulating anti-blocking structure and a thin film capacitor thereof. The insulating anti-blocking structure comprises an insulating part, a pasting part, a first copper bar and a second copper bar, the insulating part is positioned between the first copper bar and the second copper bar, so that the first copper bar and the second copper bar are insulated; two ends of the pasting part are respectively adhered to the insulating part and the first copper bar; the two sides of the pasting part are provided with blocking blocks extending outwards, and the blocking blocks are located between the first copper bar and the insulating part. By arranging the insulating part and the pasting part, the insulating property between the first copper bar and the second copper bar is ensured, and the production yield of the film capacitor is improved; by arranging the barrier block and the injection molding part, the injection molding material can be effectively prevented from overflowing between the insulating part and the first copper bar to influence the structural stability of the injection molding part and the product performance of the film capacitor.

The invention discloses an ultrahigh-voltage submarine cable flexible joint insulation recovery method, which comprises the following steps: S1, placement: placing a cable to be processed in a working environment; s2, checking to ensure that the surface of the to-be-processed cable is smooth and clean; s3, mold filling: putting the cable to be processed into an injection mold, installing a cold contraction pipe, and adjusting the position; s4, the cable to be processed in the mold is heated and kept; s5, starting an external plastic extruding machine; s6, the pressure of the mold is kept, discharging is stopped, and the extruder is removed; s7, the injection mold is heated and kept, and cooling is conducted in stages; s8, the injection mold and the cooling pipe are dismantled; according to the recovery method, the steps are simple, only one-time mold installation and extrusion process is needed, the workpiece does not need to be vulcanized after heating is stopped and cooling is completed, and the recovery method can effectively save the preparation process, shorten the process time, improve the production efficiency and be beneficial to guaranteeing the on-time delivery rate of a factory.

The invention relates to the technical field of concrete preparation, in particular to sprayed concrete with high crack resistance and low rebound rate and a preparation method thereof. The nano aerogel, the polypropylene fiber and the modified vermiculite are creatively adopted to prepare the sprayed concrete, and the nano aerogel has the water retention and moisture absorption characteristics and plays an internal curing role in the concrete, so that the internal water loss rate is reduced, the shrinkage of the concrete is weakened, and the concrete is prevented from being damaged. Meanwhile, the polypropylene crude fiber with high breaking strength and elasticity modulus and a composite cross-linked network structure formed by the polypropylene crude fiber and the modified vermiculite can greatly improve the crack resistance and durability of the sprayed concrete under the interaction; furthermore, when the concrete is cracked, the modified liquid flows out of the inner cavity of the vermiculite and is adhered and cured at the crack to realize a self-repairing effect, so that the structural deformation of the tunnel can be better limited, and the service life of the tunnel lining in a complex environment is prolonged.

The invention belongs to the field of tunnel water plugging grouting materials, and particularly discloses a heat-insulating shrinkage-reducing type water plugging grouting material suitable for a high-temperature hot water tunnel and a preparation method of the heat-insulating shrinkage-reducing type water plugging grouting material. The water plugging and grouting material for the high-temperature hot water tunnel is mainly formed by mixing a multi-element gel composite material component, a heat insulation material component, a reinforcing, toughening and shrinkage reducing component, a water dispersion resisting component, a special admixture for the high-temperature hot water grouting tunnel and the like. The water plugging grouting material for the high-temperature hot water tunnel is suitable for water leakage in the high-temperature hot water tunnel, and has the advantages of good working performance and long-term durability, high material strength, low water permeability coefficient, environmental protection and the like. The setting time of the admixture can be regulated and controlled within 30-5 minutes through the admixture special for the high-temperature hot water tunnel grouting material, and the admixture has good operability so as to meet the construction requirements of actual engineering. Under the synergistic effect of materials with a certain proportioning ratio, the water plugging grouting material has better mechanical properties and durability than a traditional water plugging grouting material, and also has good shrinkage resistance and heat insulation performance. The grouting material disclosed by the invention is good in groutability, easy to inject into tunnel surrounding rock cracks, high in stability, relatively good in later strength and durability, and particularly suitable for water plugging construction of high-temperature hot water tunnels.

The invention belongs to the technical field of ultra-high performance concrete, and particularly relates to low-shrinkage recycled aggregate ultra-high performance concrete as well as a preparation method and application thereof. The low-shrinkage recycled aggregate ultra-high performance concrete is prepared from the following raw materials in parts by weight: 840 to 860 parts of Portland cement, 140 to 160 parts of silica fume, 320 to 480 parts of natural river sand fine aggregate, 320 to 480 parts of recycled fine aggregate, 400 to 560 parts of natural basalt coarse aggregate, 240 to 400 parts of recycled coarse aggregate, 18 to 22 parts of water reducing agent, 40 to 60 parts of carbon fiber, 140 to 160 parts of steel fiber and 420 to 640 parts of water. The replacement rate of the regenerated fine aggregate for replacing the natural river sand fine aggregate is 40-60%, and the replacement rate of the regenerated coarse aggregate for replacing the natural basalt coarse aggregate is 30-50%. The prepared ultra-high performance concrete is good in fluidity, good in construction performance, low in shrinkage, high in strength and high in durability, the used recycled aggregate can save energy, cyclic utilization of waste is achieved, the method for treating the aggregate saves energy and reduces emission, and the ultra-high performance concrete is suitable for large-scale application and popularization.

The invention relates to the technical field of building materials, in particular to magnesium oxide carbonized foundation solidified soil and a preparation method and application thereof.Soil is adopted as filler, active magnesium oxide is adopted as a cementing material, and meanwhile microorganisms capable of generating carbonic anhydrase are added, so that the carbon sequestration capacity is improved; and a self-developed reinforcing agent is added to reinforce the solidified soil, so that the carbon dioxide absorption amount is synergistically improved, and the prepared solidified soil is high in mechanical property and carbon sequestration capacity and can be used as a foundation raw material for construction.

The invention discloses a monomer-free UV (ultraviolet)-moisture dual-curing adhesive and a preparation method thereof. The monomer-free UV-moisture dual-curing adhesive is prepared from UV-moisture dual-curing resin, monofunctional polyurethane acrylate, a free radical photoinitiator and an auxiliary agent, the mass part of the UV-moisture dual-curing resin is 20 to 80 parts; the mass part of the monofunctional polyurethane acrylate is 0 to 40 parts; the mass part of the free radical photoinitiator is 0-5; the mass part of the auxiliary agent is 0-11; wherein the content of each component is not 0 part. The method can be applied to wearable electronic equipment and handheld electronic equipment to solve the problem that the electronic products are prone to sensitization when making contact with human skin for a long time.

The utility model discloses a rock-soil deep foundation pit supporting and strengthening structure capable of preventing deformation, which comprises a supporting assembly, a fixing piece, a connecting piece, a supporting rod, a transverse rod and a longitudinal rod, the connecting piece is arranged on the outer side of the fixing piece, the supporting rod is arranged on the outer side of the connecting piece, the transverse rod is arranged on the outer side of the supporting rod, and the longitudinal rod is arranged on the outer side of the supporting rod. The longitudinal rods are arranged on the outer sides of the transverse rods. The foundation pit supporting device has the advantages that the transverse rods and the rod bodies are installed in a foundation pit through the anchoring rods, then the installation rods are installed in the installation blocks, the transverse rods and the longitudinal rods are connected together, then the supporting rods are installed on the installation bases through the limiting rods, the supporting rods and the transverse rods are connected and fixed, and the foundation pit is supported through the rectangular support formed by the transverse rods and the longitudinal rods; the whole rectangular supports are connected with one another, the fixing pieces are used for supporting the rectangular interiors, the supporting structure is high in strength and not prone to deformation, the whole supporting mechanism is connected into a whole, and the influence of shrinkage or expansion of soil on the supporting mechanism is small.

The invention belongs to the technical field of plastic alloy materials, and particularly relates to a multifunctional PA6 / ASA alloy material and a preparation method thereof.The preparation method comprises the steps that a proper biomass-based porous silicon carbon material is selected for treatment; weighing the PA resin, the AS resin and the compatilizer, putting into a stirring pot, and uniformly stirring; adding a wetting agent into the stirring pot, and uniformly stirring; adding a processing aid, toughened acrylic rubber powder and the treated biomass-based porous silicon carbon material into a stirring pot, uniformly stirring at a high speed, and adding the mixed material into a main feeding weightlessness scale; and setting the blanking amount of the weightlessness scale to be 30Kg / h, setting the rotating speed of a screw rod to be 420r / min, starting auxiliary equipment, and carrying out granulation production. The method is superior to a method for filling the PA6 / ASA material with inorganic minerals in special microcosmic shapes and adding a large number of functional auxiliaries, and light weight, noise reduction, low shrinkage, wear resistance, highlight, weather resistance and high temperature resistance can be achieved in the state that a single filler is added.

The invention relates to a preparation method of a modifier for a hydration product of Portland cement, the modifier mainly comprises the following raw materials: a polyphenol compound, a polyamine compound, a polysaccharide compound, an amino silane compound and the like, and the polyphenol compound is coupled under the action of oxidation and catalysis to form a dimer; the preparation method comprises the following steps: carrying out Michael addition reaction, connecting with a polyamine compound to form a polymer, respectively reacting with an amino silane compound and a modified polysaccharide compound, and grafting the amino silane compound and the modified polysaccharide compound on the polymer to obtain the Portland cement hydration product modifier. The Portland cement hydration product modifier prepared by the invention has the characteristics of simple and controllable process, wide raw material source, excellent performance and the like, can generate intercalation and other effects with cement hydration products after being doped into cement paste, gives full play to the advantage of internal and external synergy, fundamentally changes the characteristics of the hydration products, and has a good application prospect. The effects of mechanical enhancement, shrinkage inhibition and the like of the concrete are realized on the macroscopic level, and the concrete shows excellent application potential and development prospect.

The invention discloses a micro-expansive internal curing agent for steel pipe self-compacting concrete and a preparation method thereof.The micro-expansive internal curing agent comprises fluidized bed combustion ash and an adhesive component, the fluidized bed combustion ash is soaked in an adhesive solution, and the adhesive component is coated on the surface and in pores of the fluidized bed combustion ash; the mass fraction of viscose components in the viscose solution is 0.1%-1%, and the viscose components comprise 0-80 parts of alginate, 5-30 parts of polyacrylamide and 0-20 parts of carboxymethyl cellulose ether. According to the internal curing agent, the fluidized bed combustion ash is adopted as an internal curing agent matrix, the fluidized bed combustion ash is composed of calcium sulfate and the like, the early shrinkage performance of concrete can be reduced through expansion of the fluidized bed combustion ash, meanwhile, the surface porosity characteristic of the fluidized bed combustion ash is utilized, and viscose formed after alginate, polyacrylamide and carboxymethyl cellulose ether are dissolved in water is combined; pores of the fluidized bed combustion ash are filled with components such as alginate and the like, and the components are crosslinked with calcium ions on the surface of the fluidized bed combustion ash to form water-retaining gel microspheres with core-shell structures, so that the water absorption and water retention properties of the internal curing agent are improved.

The present invention provides a shield synchronous double liquid grouting material and a preparation method thereof, which belongs to the technical field of shield construction, and includes the following components by mass: 1-5 parts of component A, 0.5-5 parts of component B: wherein component A includes: 40-50 parts of cement, 10-20 parts of fly ash, 10-15 parts of epoxy-modified acrylic emulsion, and 40-50 parts of water; component B includes: 30-45 parts of early strength agent, 5-10 parts of active aluminum hydroxide, 3-15 parts of magnesium fluorosilicate, 2-8 parts of organic amine, 8-12 parts of nano silica sol, 10-20 parts of ammonium persulfate, and 0.5-1 parts of PH regulator. A shield synchronous double liquid grouting material and a preparation method thereof provided by the present invention have the characteristics of low price, excellent performance, small shrinkage, low alkali and environmental friendliness. It can solve the problems that the cement-water glass double liquid slurry consolidation body has a large shrinkage rate; it is easy to disintegrate, and the durability is poor; and the high alkaline material injected into the formation seriously pollutes the groundwater.

The invention provides a sintered brick containing iron ore tailing mud and a preparation method of the sintered brick. The sintered brick comprises the following components in parts by weight: 50-70 parts of iron ore tailing mud, 10-15 parts of concrete mixing plant sludge, 10-15 parts of coal gangue, 6-10 parts of fly ash, 10-15 parts of akermanite, 5-7 parts of magnesium cordierite and 2-4 parts of an auxiliary agent. The preparation method comprises the following steps: (1) uniformly stirring akermanite and magnesium cordierite, and carrying out hot-pressing treatment to obtain a first hot-pressed mixture; (2) pre-sintering the iron ore tailing mud and the concrete mixing plant sludge to obtain a pre-sintered material; (3) uniformly stirring coal gangue, fly ash, the first hot-pressed mixture and the pre-sintered material, adding water until the water content is 40-50wt%, and aging to obtain a mixture; (4) adding an auxiliary agent into the mixture, uniformly stirring, aging, and carrying out compression molding to obtain a green brick; and (5) drying and firing the green brick to obtain the sintered brick. The prepared sintered brick is high in yield, harmless and resource utilization of the iron ore tailing mud is achieved, and the obtained sintered brick is light in dead weight, high in compressive strength and good in weather resistance.

The invention belongs to the technical field of building materials, and particularly relates to all-solid-waste fluid-state solidified soil and a preparation method thereof. The all-solid-waste fluid-state solidified soil is prepared from the following components in parts by weight: 25 to 45 parts of modified red mud, 25 to 45 parts of modified diatomite, 10 to 30 parts of desulfurized gypsum, 90 to 110 parts of iron tailing slag, 35 to 55 parts of clay, 0.01 to 1 part of hyperdispersant, 0.01 to 2 parts of expanding agent, 0.01 to 0.5 part of internal curing agent and 75 to 125 parts of water. The all-solid-waste fluid-state solidified soil provided by the invention has the advantages of good fluidity, high strength, good volume stability, low cost and the like, and is suitable for various projects such as foundation backfilling, site leveling and the like.

The invention provides a micro-expansion high-fluidity UHPC (Ultra High Performance Concrete) for a wet joint of an assembled structure of an underground station and a preparation method of the UHPC. The micro-expansion high-fluidity UHPC for the underground station fabricated structure wet joint is prepared from the following components in parts by weight: 620 to 940 parts of cement, 31 to 47 parts of fly ash, 31 to 47 parts of mineral powder, 52 to 238 parts of silica fume, 62 to 94 parts of quartz powder, 616 to 1354 parts of quartz sand, 2.1 to 3.2 parts of water reducing agent, 0.3 to 0.6 part of defoaming agent, 4.1 to 6.2 parts of expanding agent, 0.5 to 2 parts of steel fiber, 0.05 to 0.2 part of MICP microcapsule and 99 to 188 parts of water. According to the micro-expansion high-flow UHPC for the wet joint, concrete shrinkage can be reduced, the uniformity and strength of a mixture can be improved, the structural durability can be enhanced, and the strength and working performance of the concrete can be improved through the preparation process; the added MICP microcapsules can activate microorganisms to carry out biochemical reaction after being broken, so that deposition of calcium carbonate is triggered, microcracks are repaired, the mechanical property of the concrete is improved, and the reaction can reduce water evaporation and reduce shrinkage.

A heart surgery preset soft sheath for interventional therapy through a cardiac apex way comprises a sheath tube and a large head part arranged at the rear end of the sheath tube, the sheath tube is communicated with an inner cavity of the large head part, an air bag is arranged on the outer side face of the front end of the sheath tube, a plurality of sets of narrow kerfs and small holes which are communicated front and back are formed in the peripheral side of the large head part, and the narrow kerfs and the small holes in each set are in one-to-one correspondence. A containing cavity is formed in the large head portion, a blood blocking valve is arranged on a base of the containing cavity, a port is formed in the outer end of the large head portion, and in a free state, the blood blocking valve blocks the port. Through the structural design, the depth of the hemostasis purse-string can be limited, the hemostasis purse-string can be limited on the cardiac muscle, the sheath tube cannot slip off in the operation process, the hemostasis purse-string is integrally made of medical silica gel with the hardness of 50-65 degrees, the influence on contraction and expansion of the cardiac muscle is small, and the operation line of the hemostasis purse-string is tensioned and clamped and fixed on the large head after puncture. The hydrophilic films on the air bag and the sheathing canal can reduce damage to the cardiac muscle in the placing and taking-out process.

The invention provides a composite coating coated on the surface of ultrathin flexible glass. The composite coating comprises a composite buffer layer and a hardened layer, wherein the hardened layer material comprises functional resin, a photoinitiator and a solvent; the composite buffer layer material comprises functional resin, a resin monomer, an active monomer, a photoinitiator and a solvent. The invention also provides a glass cover plate. The glass cover plate comprises ultrathin flexible glass and a composite coating coated on the surface of the ultrathin flexible glass, the composite buffer layer in the composite coating covers the surface of the flexible glass. Through the design of the coating structure and the components, compared with a multi-layer structure, the number of layers of the coating is reduced, the shrinkage rate of the coating can be reduced, and the mechanical property of the product is improved.

The invention discloses an additive for inhibiting mud powder in machine-made sand and a preparation method of the additive, and belongs to the technical field of building materials.The additive is prepared from a mud blocking component A, a sacrifice component B and a retarding component C. The mud blocking component A plays a role in neutralizing negative charges on the surfaces of mud powder particles and can separate water from clay, and the sacrifice component B plays a role in retarding the mud powder particles; water adsorbed by the layered structure of the clay is reduced, so that free water in the cement paste is increased, and the water demand of the concrete and the adsorption of the clay powder to an additive are reduced. The molecular structure of the sacrifice component B has the characteristics of short side chain, high acid-ether ratio, high charge density and small molecule, and can be adsorbed and inserted in a layered structure of mud powder more quickly than a conventional polycarboxylic acid water reducing agent, so that the adsorption of the mud powder on the water reducing agent is reduced. The retarding component C can form a complex with calcium ions in a solution, so that precipitation of calcium hydroxide is inhibited, hydration of cement is delayed, plasticity retaining property of concrete is improved, cement particle distribution can be improved, and concrete shrinkage caused by mud powder is reduced.

The invention belongs to the technical field of concrete, and particularly relates to high-specific-gravity self-compacting concrete and a preparation method thereof. The high-specific-gravity self-compacting concrete is prepared from the following raw materials in parts by mass: 560 to 671 parts of natural coarse aggregate, 725 to 906 parts of iron ore, 300 parts of natural fine aggregate, 446 parts of steel slag sand, 383 parts of cement, 0 to 54 parts of steel slag powder, 107 parts of fly ash, 2.6 to 13.6 parts of water reducing agent and 150 to 182 parts of water. The performance of the concrete is greatly improved by improving the microcosmic performance of the concrete and grading of all the components, and the purposes of reducing the use amount of cement, reducing shrinkage and creep of the concrete, reducing CO2 emission, saving energy, protecting the environment and achieving green construction are achieved while high specific gravity, self-compaction and high strength of the concrete are achieved.

The invention provides toughened anti-cracking and anti-corrosion solid waste concrete and a preparation method thereof. Mixing the cement, the fly ash, the slag and the natural aggregate; sequentially adding water, a weakly alkaline regulator and an additive solution containing a polycarboxylic acid water reducer to obtain concrete slurry; and curing to obtain the product. According to the invention, fly ash, slag solid waste and natural aggregate are used as aggregate, a water reducer is added to reduce the water consumption of concrete and improve the fluidity of concrete, and specially-made weakly-alkaline conditioning agent particles are introduced, so that the self-water-absorption-water-release behavior and bridging effect of the particles are utilized to improve the concrete fluidity. The early-stage and later-stage continuous hydration ability of a rubber material in the concrete is enhanced, the self-shrinkage and drying shrinkage resisting effects are achieved, the compactness and corrosion resistance of the concrete are improved, and then the anti-cracking ability of the all-solid waste concrete is improved. The surface of an obtained test piece is free of cracks, the 28d compressive strength reaches 46.6 MPa, the 28d breaking strength reaches 8.5 MPa, the self-shrinkage rate is 0.035%, and the drying shrinkage rate is 0.01%.

The invention relates to the technical field of cement-based building materials, in particular to low-shrinkage anti-freezing concrete and a preparation method thereof.The SAP particles with the self-ablation characteristic are synthesized and added into the concrete, the shrinkage of the concrete is reduced by means of the characteristic that the SAP particles autonomously release water and ablate in the concrete, and the anti-freezing performance of the concrete is improved. Micropores formed by ablation provide a more favorable water freezing expansion space for the concrete in the freezing and thawing cycle process, and the anti-freezing performance of the concrete is greatly improved.

The invention relates to a lithium slag-based temperature-inhibiting anti-cracking waterproof agent and a preparation method thereof, and belongs to the technical field of building materials such as cement and concrete. The lithium slag-based temperature-inhibiting anti-cracking waterproof agent comprises the following components in percentage by mass: 40%-50% of modified lithium slag, 18%-30% of a calcium ion compensating agent, 9%-19% of a complexing agent, 10%-23% of a precipitation component, 1%-4% of silicone zirconium and 3%-7% of temperature change induction fibers, wherein the total mass of the raw materials is 100%; the preparation method comprises the following steps: weighing the raw material components according to the mass fraction, and uniformly mixing to obtain the lithium slag-based temperature-inhibiting anti-cracking waterproof agent. The lithium slag-based temperature-inhibiting anti-cracking waterproof agent can be used for specifically reducing concrete shrinkage cracks, reducing the internal temperature rise of the concrete and realizing crack self-repairing in the service stage of the concrete.

The invention discloses a tailoring device with a limiting structure for textile fabric processing, and relates to the technical field of textile fabric processing.The tailoring device comprises a main body, a limiting assembly, a power source, a processor, heat dissipation holes and an operation panel, the limiting assembly is connected with the processor through a signal line, and the operation panel is connected with the processor through a signal line; a limiting assembly is installed on the upper side of the outer wall of the body, a power source is installed on the lower side of the inner wall of the body, a processor is installed on the lower side of the inner wall of the body, heat dissipation holes are formed in the two sides of the outer wall of the body, and an operation panel is installed on the left side of the outer wall of the body. According to the textile fabric tailoring device, by installing the limiting assembly, the function of moving along with a textile fabric in the tailoring process of the textile fabric and limiting is achieved, the problem of distortion in the tailoring process of the textile fabric is solved, deformation in the tailoring process of the textile fabric can be prevented, the yield of tailoring processing of the textile fabric is increased, and the tailoring processing efficiency of the textile fabric is improved. And the subsequent manual processing cost is reduced, and the economic effect is improved.

The invention provides a preparation process of a warm-keeping, breathable, antibacterial, anti-mite and anti-static cashmere overcoat lining, and belongs to the technical field of lining fabrics. Based on the selection of the satin weave crepe plain satin fabric, strict control of the degumming rate, and the selection of the Newton blue acid dye for constant tension jig dyeing machine dyeing and the preshrinking process, the color fastness, breaking strength, luster and soft hand feeling of the fabric are synergistically improved, the possibility of pilling and the stitch slipping condition are reduced, and the produced overcoat lining fabric is soft in hand feeling, good in hand feeling and good in hand feeling. The fabric is soft in gloss, stable in size and suitable for frequent wearing, washing injury is avoided, and the problems of scratching and hooking injury and poor antistatic property in wearing are solved.

The invention relates to the field of electronic component materials, in particular to optimized precious metal palladium-silver inner electrode paste for MLCC high frequency and a preparation method of the optimized precious metal palladium-silver inner electrode paste. The invention relates to optimized noble metal palladium-silver inner electrode slurry for MLCC high frequency. The slurry comprises palladium-silver alloy powder, an organic carrier, an inorganic additive and a dispersing agent, the organic carrier can be ethyl cellulose, hydrogenated rosin and diethylene glycol monobutyl ether acetate; the inorganic additive at least comprises one of zirconium oxide, aluminum oxide and barium titanate; the dispersing agent comprises at least one of ammonium stearate, ammonium oleate and ammonium linoleate and at least one of polyethylene glycol octyl ether ester acid amine, polyoxyethylene polyoxypropylene amine ether, polyethylene glycol octyl acid amine salt, polyoxyethylene lauryl ether citrate and polyoxyethylene polyether fatty acid amine. The problem of particle aggregation in the slurry can be effectively relieved, the fluidity of the slurry is optimized, the overall uniformity of the slurry is improved, and the performance of the MLCC is enhanced.

The invention discloses an elastic double-filament core-spun yarn fabric and a production method thereof, and belongs to the technical field of textiles. According to the elastic double-filament core-spun yarn fabric, pure cotton siro-spun yarns are selected as warps A, slub yarns are selected as warps B, and elastic double core-spun yarns are selected as wefts. In addition, the invention further provides a production method of the elastic double-filament core-spun yarn fabric, and the elastic double-filament core-spun yarn fabric is obtained through a warping process, a slashing process, a denting process and a weaving process in sequence. In the sizing process, warp beams of two kinds of warp yarns, namely warp yarns A C36.4 tex and warp yarns B C41.6 tex bamboo, are simultaneously adjusted on a beam creel, and the warp yarns A separated from one beam for common warping are combined with the warp yarns A on other beams. The tensile strength of the double-core-spun fabric is remarkably improved, meanwhile, the double-core-spun fabric has the characteristic of rapid moisture absorption, and the common problems of elasticity weakening and shape deformation of traditional cotton core-spun elastic fabric are effectively solved.

The invention discloses a preparation method of retarded shrinkage alkali-activated slag-calcined coal gangue cement, and belongs to the technical field of concrete materials. Slag powder, calcined coal gangue fine powder and calcium carbonate whiskers are used as powder, and then a mixed alkaline activator prepared from water glass, sodium hydroxide and sodium carbonate is doped to prepare the retarding shrinkage-reducing alkali-activated slag-calcined coal gangue cement. The method can effectively solve the problems of short setting time and large shrinkage of the alkali-activated cement, and is expected to realize large-scale engineering application of the alkali-activated cement.

The utility model discloses a high-performance asphalt forming mold with a strain real-time monitoring function, which comprises a stainless steel mold main body, and the stainless steel mold main body consists of a first mold and a second mold which are detachably connected; a cavity for forming the high-performance asphalt test piece is formed in the second mold, a transverse strain gauge assembly and a longitudinal strain gauge assembly are mounted on the side wall of the cavity, and the transverse strain gauge assembly and the longitudinal strain gauge assembly are respectively used for detecting the horizontal strain and the vertical strain of the high-performance asphalt test piece in the cavity. When the high-performance asphalt test piece is manufactured, operation is easy, demolding is easy, the size accuracy is high, the mold is not prone to deformation, the size stability of the high-performance asphalt test piece can be effectively guaranteed, meanwhile, horizontal strain and vertical strain at different depths in the curing or cooling process of the high-performance asphalt test piece can be detected in real time, and the detection accuracy is high. And a data source is provided for exploring the influence of the high-performance asphalt cement on the strain response at different depths.

The invention relates to the technical field of polymer composite material processing, and discloses a polyphenyl ether modified EVA (Ethylene Vinyl Acetate) hot melt adhesive and a preparation method thereof. The hot melt adhesive is prepared from the following components in parts by weight: 35 to 50 parts of EVA (Ethylene Vinyl Acetate) resin, 5 to 20 parts of polyphenyl ether, 30 to 60 parts of tackifying resin, 5 to 20 parts of wax and 0.4 to 0.8 part of composite antioxidant. EVA and PPE in a specific ratio are selected as base materials (wherein EVA is the main base material), and a proper amount of tackifying resin is added into the system to modify the EVA hot melt adhesive, so that the melt viscosity of the system is reduced, the cohesion of the hot melt adhesive and the wettability of the hot melt adhesive on a bonding interface are improved, the bonding strength is enhanced, and the performance is further improved; the tackifying resin is low in volatile matter, and the softening point of the tackifying resin is higher than that of EVA resin, so that the softening point of the hot melt adhesive can be further improved, and the low-temperature resistance, mechanical property and ageing resistance of the hot melt adhesive are improved.