80results 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 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 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 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 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 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 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 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.

The utility model provides a lower limb exercising device which comprises a base. The lifting assemblies are arranged in the base, each lifting assembly comprises a multi-section type electric lifting rod and a supporting rod, and the multi-section type electric lifting rods drive the supporting rods to move up and down; the sliding assembly comprises a sliding rail and a sliding block in sliding fit with the sliding rail, the sliding rail is detachably fixed to the bed frame, the top of the sliding block is connected with the base, and the base slides on the bed frame through the sliding assembly. The nursing bed is easy to operate and convenient to use in nursing work.

The utility model relates to the field of packaging adhesive films, in particular to a packaging adhesive film, which is formed by a plurality of warps and wefts which are interspersed and casted. Wherein at least one of the warps and the wefts is wavy; a semi-transparent gap is formed between two adjacent warps and two adjacent wefts; according to the packaging adhesive film provided by the utility model, the friction force of the packaging adhesive film is greatly increased through the up-down staggered structure, the packaging adhesive film has excellent anti-skid performance, meanwhile, the arrangement of the semi-transparent gaps enables exhaust to be easier, assembly lamination bubbles are obviously reduced, the structure enables the shrinkage of the adhesive film to be reduced, and in addition, the adhesive film produced by the structure is higher in process efficiency and is more energy-saving.

The invention discloses a glue-free PET (Polyethylene Terephthalate) composite PVC (Polyvinyl Chloride) film and a preparation method thereof. The glue-free PET composite PVC film is prepared from the following components in parts by mass: 100 parts of PVC resin, 16 to 50 parts of plasticizer, 2 to 8 parts of stabilizer, 0.5 to 2 parts of processing aid, 0.5 to 2 parts of anti-ultraviolet agent and 2 to 10 parts of anti-impact modifier. According to the adhesive-free PET composite PVC film and the preparation method thereof provided by the invention, the polyester plasticizer with high molecular weight is adopted, and the anti-ultraviolet agent is compounded and added, so that the weather resistance and the ultraviolet resistance of the PVC film can be improved; and the acrylate impact modifier is adopted, so that the processability of the product and the toughness of the finished product can be improved. The PET is directly compounded in the PVC calendering production process, so that the double-sided highlight effect of the PVC film is realized, the transparency of the product is high, and the extinction problem in the industry is solved.

The application relates to the technical field of roadbed engineering, in particular to a roadbed filler based on high-water-content gold flotation tailings and a preparation method thereof.A roadbed filler based on high-water-content gold flotation tailings is prepared from the following raw materials: gold flotation tailings, modified precipitation material, curing agent, activator, solid modifier and anti-cracking agent; the water content of the gold flotation tailings is lower than 20%; in the application, the porous precipitation material and the low-carbon cementing material are used to perform pre-dehydration treatment and efficient curing treatment on the high-water-content gold flotation tailings, so that the roadbed filler with low carbon and low cost and with high strength and low shrinkage is obtained.

The invention belongs to the technical field of concrete, and particularly relates to colored black iron powder micro-expansion self-compaction bare concrete which comprises cement, coal ash, fibers, an expanding agent, fine aggregate, coarse aggregate, black iron powder, an additive and water, the fine aggregate is two-zone shaping medium sand, the coarse aggregate is shaping pebbles, the particle size of the pebbles is 5-20 mm, the black iron powder is continuously graded, and the additive is water. The admixture comprises the following raw materials: a water reducing agent, a viscosity reducer, a slump retaining agent, a workability improving agent, a retarder and a defoaming agent, and the doping amount of the admixture is 2.2%-2.7% of the weight part of the cementing material (cement, fly ash and the expanding agent). The invention further provides a construction method of the colored black iron powder micro-expansion self-compaction bare concrete. The method can reduce and even avoid surface defects of concrete, particularly controls bubbles and colors on the surface of the concrete, controls shrinkage cracks of the bare concrete, has crack resistance, is low in hydration heat, and avoids temperature difference cracks of the bare concrete in the early stage.

The invention discloses an electroplating-grade polypropylene composite material and a preparation method thereof. The composite material is prepared from the following raw materials in percentage by weight: 30-70% of co-polypropylene; 20-40% of a coarsening agent; 0-30% of a filler; 0-30% of an elastomer toughening agent; 0-3% of a compatilizer; 0.1-2% of a stabilizer; and 0-5% of other additives. Through the synergistic effect of the coarsening agent and the filler, the rigidity and toughness of the composite material are guaranteed, meanwhile, the composite material has an excellent electroplating effect, application of a finished product is guaranteed, and compared with electroplating-grade PC / ABS and ABS materials, the composite material is lower in price and cost and has a good application prospect.

The invention relates to the technical field of waterproof coiled materials, and particularly discloses an asphalt modified ethylene vinyl acetate waterproof coiled material and a manufacturing process thereof. Comprising the following operation steps: S1) cleaning and drying polyester fabric, placing the polyester fabric in slurry at 40-50 DEG C, and performing ultrasonic soaking to obtain prefabricated polyester fabric; (2) the gridding cloth is cleaned and dried, and prefabricated gridding cloth is obtained; s2: (1) heating asphalt to a molten state, adding the modified ethylene-vinyl acetate copolymer, heating, uniformly mixing, shearing at a high speed for 20-30 minutes, then shearing at a low speed for 20-30 minutes, and incubating for 1-2 hours to obtain modified asphalt; (2) uniformly mixing polyvinyl chloride, modified asphalt and styrene-butadiene-styrene, plasticizing and extruding to obtain a matrix coiled material; and S3, the base body coiled material and the prefabricated polyester fabric are sequentially overlaid on the prefabricated gridding cloth, composite treatment, traction, width adjustment and rolling are sequentially conducted, and the waterproof coiled material is obtained.

The invention belongs to the technical field of building materials, and discloses a cement-based composite material based on multistage toughening and intelligent repairing and a preparation method thereof.The cement-based composite material comprises finished product dry powder, an additive and mixing water, and the finished product dry powder comprises, by mass, 400-500 parts of ordinary Portland cement, 50-100 parts of mineral powder and 20-60 parts of nano metakaolin; the invention relates to a water-based composite material which comprises the following components in parts by weight: 15-35 parts of epoxy modified redispersible latex powder, 1-5 parts of pre-water-absorbing SAP microspheres, 0.5-1.5 parts of PP fibers, 0.5-1.5 parts of PVA fibers, 800-900 parts of machine-made sand, 1-3 parts of surface-treated shape memory alloy short fibers and 3-8 parts of elastic polymer microspheres. The additives comprise a geopolymer prefabricated liquid, a water reducing agent, a defoaming agent and a retarder, and the mass ratio of the finished product dry powder to the geopolymer prefabricated liquid to the mixing water to the water reducing agent to the defoaming agent to the retarder is 100: (25-28): (8-10): (5-10): (1-3): (0.5-2). Compared with the existing material, the cement-based composite material provided by the invention has the characteristics of high toughness, impact resistance and low shrinkage, and also has an internal repair function.

The application discloses a kind of stone cultural relics's repair equipment and surface repair method, it is related to cultural relic repair technical field, including the placing table for placing cultural relics to be repaired, still including visual scanning unit, control unit, material supply and premix unit and execution perfusion unit, material supply and premix unit are electrically connected with control unit, this unit includes bacteria liquid warehouse, cementing liquid warehouse, pH regulator warehouse, dilution buffer solution warehouse, powder slurry warehouse and a batch processing type mixing tank, above-mentioned each warehouse body is communicated with batch processing type mixing tank, for supplying repair raw material as needed.The application realizes the adaptive repair to crack morphology;Through batch, variable concentration perfusion strategy, the problem of uneven filling caused by traditional one-time perfusion is solved;Through the cooperation of elastic stirring blade in batch processing type mixing tank and self-bleeding air pressure structure, efficient switching of mixing and discharging and automatic cleaning of pipeline are realized, the accuracy and reliability of multi-batch perfusion process are ensured.

The utility model discloses an operating angle adjustable hedge trimmer, including the rear shell of being equipped with rotating axle and the front shell of rotating bushing on rotating axle and being equipped with a plurality of limit mouth, install the elastic member of sliding limit rotation piece and the elastic member of backward elastic action limit rotation piece on the rear shell, be equipped with the clamping portion of clamping in limit mouth on limit rotation piece, be equipped with the rear handle of extending before and after on the rear shell, limit rotation piece is equipped with the compression part of being located rear handle front lower position, press the compression part of limit rotation piece, the clamping portion of limit rotation piece can slide and separate limit mouth, and the front shell can rotate and adjust with the rear shell. Compared with the prior art, the utility model has the advantages that through the push operation of limit rotation piece, the rotation restriction between the front shell and the rear shell can be unlocked, the action amplitude of push operation is small, the action path is simple, short distance direct push is realized, unnecessary muscle contraction is reduced, fatigue can be reduced, unlocking operation is more labor-saving, and fatigue during repeated operation is reduced.

A photocurable composition useful for forming a durable impact-resistant coating on nails comprising: a). at least one (meth)acrylate functionalized monomer; b). at least one (meth)acrylate functionalized oligomer; c). at least one particle of a core / shell copolymer; and d). at least one photoinitiator.

The present invention belongs to the technical field of engineering building materials, and specifically relates to a road surface rapid repair mortar of composite magnesium cement and alkali-activated slag and a preparation method thereof; wherein the road surface rapid repair mortar comprises: dead-burned magnesium oxide, dipotassium hydrogen phosphate, disodium hydrogen phosphate, domestic waste incineration slag, nano-colloidal silica, fine aggregate, water, nano-cellulose and water reducer. The present invention utilizes the hydration intermediate product of magnesium phosphate gelling material to react with nano-colloidal silica to generate potassium silicate and sodium silicate, stimulates domestic waste incineration slag, and generates highly water-resistant C-A-S-H gel. This not only effectively utilizes domestic waste incineration slag, practices the concept of green environmental protection development, but also improves the water resistance of magnesium phosphate gelling material. Similarly, due to the addition of nano-cellulose, not only the volume stability of the mortar is improved, but also its anti-permeability performance is significantly improved. Therefore, it has positive significance for realizing the preparation and application of magnesium phosphate gelling material in the field of rapid road surface repair.

The invention provides microporous low-shrinkage concrete and a preparation method thereof, and belongs to the field of concrete.The microporous low-shrinkage concrete is prepared from, by weight, 300-380 parts of cement, 30-70 parts of fly ash, 250-350 parts of medium sand, 1200-1550 parts of guar stone, 5-10 parts of silica fume, 2-4 parts of dihydrate gypsum, 0.5-2 parts of water glass, 2-5 parts of a water reducing agent, 0.1-0.3 part of a retarder, 4-8 parts of rubber powder, 0.02-0.08 part of a thickening agent and 2-6 parts of water absorption fibers. 110 to 150 parts of water; and the porosity of the microporous low-shrinkage concrete is 8-10%. Through innovative material design and a synergistic effect, comprehensive improvement of waterproofness, crack resistance, construction performance and economical efficiency is achieved, seepage water can be changed from blocking to dredging through a unique micropore structure, and the efficient and durable anti-seepage effect is achieved; meanwhile, the stability of a base layer is guaranteed through high strength, strong bonding force is formed with a surface layer, and hollowing and cracking are effectively eradicated; in addition, the water-absorbing fiber internal curing component and the expansion component cooperate, so that the cracking risk is avoided, and the long-term stability and safety of the floor system are guaranteed.

The present application relates to the technical field of 3D printing concrete, and discloses a preparation method of 3D printing concrete mixed with plant fibers, which comprises the following steps: step 1, soaking and drying the plant fibers treated with water glass in saturated limewater; step 2, blending the plant fibers with sulphoaluminate cement; step 3, preparing alkali-activated 3D printing concrete and pumping it by taking 30-50 parts of water glass, 20-40 parts of sodium hydroxide, 100-200 parts of limestone powder, 1000-1200 parts of sand, 100-200 parts of extra-fine sand, 400-500 parts of mineral powder, 50-150 parts of rice husk ash, 20-40 parts of hydroxypropyl methyl cellulose, 220-300 parts of water and 5-10 parts of water reducing agent according to mass fraction; step 4, forcibly stirring the concrete and adding the product obtained in step 2; and step 5, printing the concrete and spraying a setting agent between the concrete layers. The present application helps to improve the constructability of 3D printing concrete and reduce its shrinkage.