67results about How to "Increase dosage" patented technology

The invention discloses low-cost double-network fluorinated silicone rubber and a preparation method thereof, and relates to the technical field of fluorinated silicone rubber. The double-network fluorosilicone rubber comprises the following raw materials: vinyl silicone resin, vinyl fluorosilicone resin, hydrogen-containing fluorosilicone oil, a solubilizing monomer, a multifunctional acrylate monomer, a reinforcing filler, a structured control agent, a free radical thermal initiator, a platinum catalyst and an inhibitor. The double-network fluorosilicone rubber is formed by constructing a carbon-carbon chain network and a siloxane network, the tensile strength, toluene swelling resistance and ATF oil resistance at the high temperature of 150 DEG C of the fluorosilicone rubber are obviously improved, the preparation cost of the fluorosilicone rubber is reduced, and a favorable support is provided for widening the application field of the fluorosilicone rubber.

The invention belongs to the technical field of punching equipment, and particularly relates to a special variable-diameter down-the-hole drill bit for large strip mine deep blast hole punching, which comprises a drill bit neck, a drill bit body is fixedly connected to the drill bit neck, first drill teeth are fixedly mounted on the drill bit body, square grooves are formed in the drill bit body in an array manner, and adjusting assemblies are arranged in the square grooves. A square block is arranged in the square groove in a penetrating mode, one end of the square block is fixedly connected with a reaming head, and a frame is arranged in the square block. According to the special variable-diameter down-the-hole drill bit for drilling the deep blast holes in the large strip mine, through the arranged square block and the reaming head, the blast holes with different diameters can be conveniently excavated for use, so that when the explosive consumption is increased and the blasting effect is ensured, the micro motor works to enable the square block to move, and through cooperation of the reaming head after the square block is moved, the drilling efficiency is improved; when the drill bit body rotates, the reaming head can be driven to do circular motion, the area of a digging and penetrating site of the drill bit body is enlarged through the reaming head, and the purpose of enlarging and adjusting the diameter of a dug blast hole is achieved.

The invention discloses an efficient composite injection molten iron desulfurization method, which mainly solves the technical problem of high molten iron desulfurization cost in the existing magnesium-based composite injection molten iron desulfurization process. According to the technical scheme, the efficient composite injection molten iron desulfurization method comprises the following steps: 1) collecting parameters of inverted molten iron; (2) front injection is carried out, the injection powder is lime powder, a top spray gun is inserted into the molten iron in the ladle, the lime powder is injected, and front injection parameters are determined before the lime powder is injected; (3) composite injection is conducted, injection powder is lime powder and magnesium powder, after front injection is finished, the lime powder and the magnesium powder are injected into the molten iron in the ladle at the same time, and composite injection parameters are determined before the lime powder and the magnesium powder are injected; 4) carrying out post-injection, wherein the injection powder is lime powder; and (5) after the post-blowing is finished, the spray gun is lifted. According to the method, high-efficiency and low-cost desulfurization of the molten iron is realized by adopting a lime powder desulfurization mode in a front injection stage.

The invention relates to low-cost retarded concrete and a preparation method thereof. The low-cost retarded concrete comprises the following components in parts by weight: 24-27 parts of cement, 6-8 parts of blast furnace slag powder, 5-8 parts of fly ash, 70-90 parts of fine aggregate, 2-7 parts of sludge incineration ash, 93-100 parts of coarse aggregate, 0.4-0.6 part of a water reducing agent, 0-0.25 part of a retarder and 12-21 parts of water. When the temperature of the production environment is lower than 30 DEG C, the retarder comprises sodium gluconate; when the temperature of the production environment is higher than or equal to 30 DEG C, the retarder further comprises white sugar. According to the invention, the sludge incineration ash is recycled, phosphate radicals dissolved in the sludge incineration ash are combined with calcium ions generated by cement hydration, and the calcium ions coat the surfaces of cement particles to hinder further hydration of cement, so that the purpose of retarding is achieved, and the cement can be retarded by increasing the mixing amount of the sludge incineration ash and the retarder. The retarded concrete meeting different setting time requirements can be prepared; other components in the sludge incineration ash can be subjected to secondary hydration reaction with calcium hydroxide generated by cement hydration, so that the durability of the concrete can be improved.

The invention belongs to the technical field of modified polyvinyl alcohol (PVA) sizing agents used for textile warp sizing, and discloses a preparation method of anionic PVA textile sizing agents, which comprises the following steps: firstly treating PVA raw materials with a sodium hydroxide solution to generate sodium polyvinyl alcohol; then, sodium polyvinyl alcohol reacts with an etherifying agent halogenated acetic acid to generate carboxymethyl etherified PVA; according to the method disclosed by the invention, non-ionic PVA can be modified into anionic carboxymethyl PVA, and the anionic carboxymethyl PVA can be efficiently adsorbed by a common cationic adsorbent, so that recycling of PVA slurry in the desizing waste liquid is realized, damage of the desizing waste liquid to a water environment can be greatly reduced, and the method has relatively great application potential.

The invention provides an epoxy modified cement-based material, the epoxy modified cement-based material comprises an organic phase structure and inorganic crystals, and the inorganic crystals are radially distributed on the surface of the organic phase structure; the organic phase structure is a spherical or sphere-like structure with the diameter of 3-15 microns; the inorganic crystal is of a needle-shaped, rod-shaped or sheet-shaped structure with the length being 0.3-3 microns and the diameter being 0.05-0.5 microns. The epoxy modified cement-based material disclosed by the invention shows good adhesion and dispersion resistance under water or in a humid environment, can realize rapid underwater construction, and keeps stable performance for a long time under harsh conditions such as a marine environment and a humid environment; the engineering requirements of multiple fields such as building structure repairing, underwater repairing, rapid first-aid repair, ocean protection and road and bridge engineering are met, and the integration of high strength, high toughness, strong interface bonding and long-acting durability is realized.

The application relates to the field of vacuum aluminum-plated paper processing and specifically discloses a dry-wet compounding process for vacuum aluminum-plated paper. The dry-wet compounding process for vacuum aluminum-plated paper comprises the following preparation steps: S1, coating a bottom adhesive on a film, and heat setting one side of the bottom adhesive close to the film; S2, compounding the heat-set bottom adhesive with base paper, curing the bottom adhesive, and forming a bottom coating layer on the surface of the base paper; S3, vacuum aluminum plating on the side of the bottom coating layer away from the base paper to form a vacuum aluminum-plated layer; and S4, coating a surface adhesive on the side of the vacuum aluminum-plated layer away from the bottom coating layer, curing to form a surface coating layer, and obtaining vacuum aluminum-plated composite paper. The dry-wet compounding process can improve the amount of the bottom adhesive without causing overflow of the bottom adhesive, improve the folding resistance of the obtained vacuum aluminum-plated paper, and solve the color explosion problem.

This invention relates to the field of road engineering technology, and more particularly to a multi-objective performance coupling design method for warm-mix synchronously recycled SBS modified asphalt. The method determines the aging degree of aged SBS modified asphalt through testing, and accordingly determines the optimal dosage of the two-component synchronous recycling agent and the warm-mix agent. Subsequently, a diffusion model and a fusion degree calculation model for new and old SBS modified asphalt are established to quantitatively analyze the fusion degree of new and old asphalt under different temperatures and aged asphalt dosages. Based on this, a fusion degree spectrum is constructed, and by defining thresholds for each performance index, a feasible design scheme range for balanced performance is obtained, thereby determining the optimal mixing temperature and the maximum dosage of aged SBS modified asphalt. This invention can quickly determine the maximum allowable dosage of aged SBS modified asphalt and its corresponding optimal mixing temperature while considering multiple performance objectives, providing a reliable theoretical basis for the durability design of high-performance recycled SBS modified asphalt pavements.

The invention provides an iron ore tailing mud-based cement admixture and a preparation method thereof. The material comprises the following raw materials in parts by weight: 50-60 parts of tailing mud, 12-16 parts of composite calcium powder, 8-13 parts of water glass, 18-25 parts of a polyvinyl alcohol solution, 10-14 parts of polydimethylsiloxane, 20-27 parts of calcium sulfate whiskers and 12-16 parts of a silane coupling agent. The preparation method comprises the following steps: drying and crushing the iron ore tailing mud, adding the composite calcium powder and the water glass, uniformly mixing and calcining, adding the polyvinyl alcohol solution for primary ultrasonic dispersion, adding the polydimethylsiloxane, the calcium sulfate whisker and the silane coupling agent for secondary ultrasonic dispersion, drying and grinding to obtain the iron ore tailing mud-based cement admixture. According to the method, the iron ore tailing mud waste obtained after beneficiation serves as the raw material and is pretreated to be used for preparing the cement-based mixed material, the comprehensive utilization rate of the waste can be increased, resources are saved, the doping amount of the iron ore tailings pretreated through the method can be increased, meanwhile, the influence of the iron ore tailings on cement performance can be reduced, and the cement-based mixed material is obtained. The cement has good compressive strength and breaking strength.

The invention belongs to the technical field of manganese slag resource utilization, and particularly relates to a composite exciting agent, manganese slag fluid soil and a preparation method and application of the manganese slag fluid soil. The composite activator comprises mineral powder, lime, cement and a surface modifier. The surface modifier comprises higher phosphate and higher fatty acid salt. The mineral powder, the cement, the lime and the surfactant serve as the composite exciting agent, when the manganese slag is treated, the activity of the manganese slag can be activated, the manganese slag fluid soil with good compressive strength is formed, the manganese slag has the high mixing amount and accounts for 85-95.5% of the total mass of the mixed powder, the purpose of large-scale resource utilization of the manganese slag can be achieved, the environmental pressure is relieved, and the economic benefit is increased. And the method has good economical efficiency. Meanwhile, the surface modifier adopts a specific high-grade phosphate and high-grade fatty acid salt compounding mode, so that the friction force in a composite system can be effectively reduced, the flowability of the composite system is improved, the problem of limited material contact is solved, and the compressive strength is improved.

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 application belongs to the technical field of brush materials, and provides a silver graphite brush material and a preparation method thereof.The raw materials of the silver graphite brush material include flake graphite particles, silver powder and nano silicon powder.The silver graphite brush material breaks the technical limitations of traditional resin bonding systems and homogeneous structures, can take into account the advantages of original wear resistance, high temperature resistance and long service life, and can also solve the industry difficulties of poor assembly welding reliability of small brushes and high environmental protection cost.The preparation method can realize synchronous improvement of micro interfaces and macro structures, and the process is stable, controllable and industrialized batch production.

The invention relates to the technical field of cosmetics, and particularly discloses a dual-purpose dipping type makeup-holding eyebrow pencil for eyebrows and eyes and a preparation method of the dual-purpose dipping type makeup-holding eyebrow pencil. A dual-purpose dipping type makeup-holding eyebrow pencil for eyebrows and eyes comprises eyebrow pencil liquid and eyebrow powder. The eyebrow pencil liquid is prepared by mixing a film-forming agent, a preservative, a humectant and water, the eyebrow powder is prepared by mixing a thickening agent, a film-forming agent, a preservative, a humectant, a coloring agent, a filling agent and water. The preparation method comprises the following steps: stirring and mixing the humectant, the preservative and the water, then adding the film-forming agent, and stirring and mixing to obtain eyebrow pencil liquid; the preparation method comprises the following steps: stirring and mixing the thickening agent, the water, the preservative and the humectant, adding the coloring agent, stirring and mixing, and finally adding the film-forming agent, stirring and mixing to obtain the eyebrow powder. According to the eyebrow-eye dual-purpose dipping type makeup-holding eyebrow pencil, the content of the film-forming agent in the eyebrow pencil is increased, a compact film layer can be formed on the skin surface layer, and the eyebrow pencil has a good makeup-holding effect.

This invention belongs to the field of blast furnace carbon emission reduction technology and discloses a blast furnace carbon emission reduction ironmaking system and method, including: oxygen-enriched ironmaking with the participation of a mixed reaction gas with high CO2 concentration. Due to the use of CO2 in the blast furnace blast and pulverized coal carrier gas, the oxygen enrichment rate is increased, and the amount of biochar is increased, thereby improving the smelting intensity of the blast furnace, increasing the proportion of pulverized coal replacing coke (increasing the coal ratio and decreasing the coke ratio), reducing ironmaking costs, and reducing carbon emissions. Furthermore, due to the use of CO2 injection and oxygen-enriched ironmaking operations, the amount of air incorporated into the mixed reaction gas is reduced, increasing the concentration of CO and CO2 in the blast furnace gas, which is beneficial for subsequent capture, separation, purification, and resource utilization of different components in the blast furnace gas.

The present invention provides a water mist filtering smoking device, comprising a shell and a water mist generating device, wherein a smoke outlet and a smoke inlet are provided on the shell, a mixing chamber is provided in the shell, the mixing chamber is connected with the smoke outlet and the smoke inlet, and the smoke enters the mixing chamber from the smoke inlet; the water mist generating device is connected with the mixing chamber, and the water mist and smoke generated by the water mist generating device are mixed in the mixing chamber and then flow out through the smoke outlet. Compared with traditional smoking devices, when smoke passes through water, it is in a bubble state, and only the harmful components in the smoke on the surface of the bubble are absorbed by the water, and a large amount of gas inside the bubble does not contact with the water. The water mist filtering smoking device provided by the present invention atomizes water into water mist, and the water mist and smoke are mixed more fully, and the contact area is greatly increased, which is conducive to improving the effect of reducing tar and reducing harm, and the amount of water used is greatly reduced, which is convenient to carry and use.

The application discloses an anti-erosion auxiliary gel material and a preparation method and application thereof. The preparation method of the anti-erosion auxiliary gel material comprises the following steps: 1) mixing regenerated red brick powder with a particle size of 3-10 microns, waste concrete regenerated micro powder with a particle size of less than 10 microns and water to perform a pre-hydration reaction, and then separating a solid product to obtain pre-hydration regenerated powder; 2) calcining the pre-hydration regenerated powder, and then rapidly cooling to room temperature and performing grinding to obtain active regenerated powder; and 3) uniformly mixing the regenerated red brick powder with a particle size of less than 3 microns and the active regenerated powder to obtain the anti-erosion auxiliary gel material. The anti-erosion auxiliary gel material can be added in a large amount in concrete, can effectively improve the anti-Cl ‑ erosion performance of the concrete, does not affect the mechanical properties of the concrete, and is suitable for large-scale industrialized production and application.

The utility model discloses a two-way prestress weight reduction assembly type composite floor slab system. The two-way prestress weight reduction assembly type composite floor slab system comprises a pre-tensioning prestress prefabricated concrete bottom plate, weight reduction blocks, cast-in-place concrete ribs and post-tensioning prestress steel bars. Longitudinal prestressed load-bearing steel bars and transverse distribution steel bars are arranged in the pre-tensioned prestressed precast concrete bottom plate. A concrete reinforcing rib or a steel truss reinforcing rib or a steel and concrete combined structure reinforcing rib is arranged on the concrete bottom plate; the weight reducing blocks are laid on the pre-tensioned pre-stressed precast concrete bottom plate, and the weight reducing blocks are spaced by a certain distance. A plurality of pre-tensioned pre-stressed precast concrete bottom plates are assembled together, and concrete ribs are formed after the weight reducing blocks are cast in place. The prestressed steel bars are post-tensioned in the concrete ribs, and after the concrete reaches the strength, the steel bars are tensioned to form post-tensioned prestressing force to form bonded or unbonded prestressing force. According to the utility model, the bidirectional rigidity of the floor system is consistent, the bidirectional force transmission performance and the bidirectional anti-cracking effect are better, the integrity of the floor system is better, and more steel materials are saved.

This invention discloses an industrial production method for cement clinker that co-processes heavy metal-containing waste, comprising: raw meal preparation: raw meal is prepared according to the following proportions by weight: 84-87 wt% calcareous raw materials, 6.0-7.2 wt% clayey raw materials, 4.8-5.8 wt% corrective raw materials, and 2.0-4.5 wt% heavy metal-containing waste; addition of composite synergist: a heavy metal adsorption-mineralization composite synergist is added to the raw meal; pre-decomposition: the homogenized raw meal is preheated by a multi-stage cyclone preheater and then enters a decomposition furnace for carbonate decomposition; clinker calcination: the decomposed raw meal enters a rotary kiln and is calcined at 1350-1450℃ to form clinker; and rapid cooling of clinker: the calcined clinker is rapidly cooled to room temperature by a grate cooler to obtain finished cement clinker. This invention can achieve a total solidification rate of heavy metals in clinker of 93%, and increase the retention of Pb, Cd and Zn by 13.9 times, 59.1% and 11.5% respectively, and increase the 28-day compressive strength to 61.8 MPa.

The present application relates to the technical field of aluminum plate production, and discloses an automated production device and method for honeycomb aluminum plates, including a processing table with a fixed frame 1 installed on both sides of the top, a moving seat with an electric slide rail 1 installed inside, a chuck 1 fixed inside, a coating mechanism fixedly connected to one side of the outer wall, which is used to apply glue to the honeycomb core, a synchronization mechanism fixedly connected to one end of the coating mechanism, which performs seal trimming according to the glue coating route, and a conversion component installed on one side of the outer wall of the coating mechanism. The shape of the outer wall on one side of the seal can be matched with the outer wall of the honeycomb core of the honeycomb aluminum plate through the synchronization mechanism, and the edge shape information of the honeycomb core collected during the glue coating process is transmitted to the controller of the electric push rod and the electric slide rail 3, driving the laser machine to cut and trim the seal along the edge trajectory of the honeycomb core, effectively increasing the airtightness of the edge packaging of the honeycomb aluminum plate, and improving the stability and durability of the product.

The invention discloses a method for co-processing a waste tire based on microwave pyrolysis and a product steel process. The method comprises the following steps: S1, carrying out wire drawing on the waste tire; s2, carrying out crushing and magnetic separation to obtain steel wires, other magnetic substances and non-magnetic substances; s3, the steel wires and the other magnetic substances are conveyed to a converter or an electric furnace; s4, performing microwave pyrolysis on the non-magnetic substance to obtain an oil-gas mixture and pyrolysis residues; and S5, the oil-gas mixture is conveyed to a coke oven gas system, and the pyrolysis residues are conveyed to a rotary hearth furnace. The invention further discloses a system for co-processing the waste tires based on the microwave pyrolysis and the product iron and steel process. According to the method, the microwave pyrolysis process of the waste tires is tightly combined with the existing working procedures of the steel plant, and the adverse effect of the waste tires on the environment can be avoided in a co-processing mode.

The application provides a kind of green low carbon cementitious material and its preparation method, belong to building material technical field.The application first carries out pretreatment to converter slag to obtain superfine converter slag, so as to improve the activity and fluidity of converter slag;By compounding sodium hydroxide, liquid water glass and sodium chloride as alkali activator as alkali activator, so as to improve the early and late compressive strength of concrete obtained by replacing cement with green low carbon cementitious material;The application can further improve the green low carbon cementitious material by adding emulsified asphalt and PE fiber in the raw material, so as to realize the increase of the amount of green low carbon cementitious material that can replace cement.

The invention provides a paper product, modified light calcium carbonate and a preparation method thereof. The preparation method of the modified light calcium carbonate comprises the following steps: carrying out surface charge modification treatment on light calcium carbonate; carrying out micro-polymerization treatment on the light calcium carbonate subjected to surface charge modification treatment; and carrying out pre-flocculation treatment on the light calcium carbonate subjected to micro-polymerization treatment. According to the preparation method of the modified light calcium carbonate provided by the embodiment of the invention, the light calcium carbonate is firstly subjected to surface modification (charge adjustment), then subjected to micro-polymerization (specific surface area adjustment) and finally subjected to pre-flocculation (overall form optimization), the modified PCC filler can be added into paper pulp for papermaking, and under the condition that the addition amount of the PCC filler is increased, the specific surface area of the PCC filler is increased, and the overall form of the PCC filler is optimized. The water filtering performance of the pulp is ensured, the retention characteristic is not deteriorated, and considerable paper physical property strength, surface strength and sizing performance are maintained. And on the premise of ensuring the running performance of the paper machine, the paper making raw material cost is reduced while the same paper quality is achieved.

The invention belongs to the technical field of magnetic solid-phase extraction and analysis. The invention provides a method for quantitatively detecting bisphenol pollutants in traditional Chinese medicines for soil and roots based on a magnetic MOF (at) COF porous composite material combined with LC-MSMS. The method comprises the steps of preparation of the magnetic MOF (at) COF porous composite material, sample pretreatment and LC-MSMS detection and quantitative analysis. The magnetic MOF (COF) porous composite material disclosed by the invention has rich hierarchical pore structures and high specific surface area, not only retains regular pore channels and active sites of a metal organic framework (MOF), but also is connected with a covalent organic framework (COF), so that the stability of the material is greatly improved. Meanwhile, the material is mild in preparation condition, low in cost and excellent in adsorption performance. Compared with the existing method, the detection method provided by the invention has the advantages of more thorough extraction, lower detection limit, higher recovery rate, simpler operation and lower cost, and is suitable for two matrixes of soil and root system traditional Chinese medicines.

This invention discloses a pipe node connection assembly and an aquaculture cage, relating to the field of deep-sea aquaculture equipment technology. The pipe node connection assembly is applied to an aquaculture cage, which includes a central column and multiple edge columns. The pipe node connection assembly includes struts, spokes, and an elbow plate structure. Adjacent edge columns are connected by struts, with each edge column connected to two struts. The central column is connected to multiple edge columns via multiple spokes, with the spokes positioned between two struts on the same edge column. The elbow plate structure is fan-shaped and connected to the outer periphery of the edge columns. The elbow plate structure is positioned between the struts and spokes, with the radial sections on both sides of the elbow plate structure connected to the struts and spokes, respectively. This invention, through the coordinated arrangement and connection of the struts, spokes, and elbow plate structure, effectively enhances the connection strength and stress concentration resistance of key pipe nodes in the aquaculture cage, while reducing structural complexity and saving economic costs.

The utility model relates to the technical field of PCB (printed circuit board) processing, and discloses a water-saving recycling device which comprises a rack, the rack is provided with a pretreatment structure and an advanced treatment structure, the pretreatment structure comprises a wastewater primary treatment mechanism arranged at one end of the rack, and the pretreatment structure further comprises a wastewater primary treatment mechanism arranged on one side in the rack; the advanced treatment structure comprises a wastewater secondary treatment mechanism on the other side of the inner and outer ends of the rack, and further comprises a storage mechanism arranged at the other end of the rack. The advanced oxidation technology is introduced, the advanced oxidation technology can be adopted for organic pollutants difficult to remove, the ozone oxidation treatment tank is arranged, complex organic matters are decomposed into simple biodegradable substances, and the treatability of wastewater is improved.

The invention particularly relates to a thermal decomposition temperature rise characteristic testing method of an initiating explosive material grain. The method comprises the following steps: establishing a temperature difference-temperature curve of the initiating explosive materials with different masses in a loose state by adopting a DTA thermal analyzer, and screening a to-be-detected explosive quantity for representing the thermal decomposition temperature rise characteristic of an explosive column of the initiating explosive materials by taking whether the DTA thermal analyzer is damaged in a testing process as an evaluation index; pressing the initiating explosive material with reference to the initiating explosive material grain pressing parameters under the to-be-detected explosive quantity to obtain a to-be-detected grain of the initiating explosive material; the method comprises the following steps: establishing a temperature difference-temperature curve of a to-be-detected explosive column of the initiating explosive material at a heating rate of not greater than 5 DEG C / min by adopting a DTA thermal analyzer, judging whether the explosive column is violently exploded or not, obtaining an initial decomposition temperature, a decomposition peak temperature and a temperature difference peak temperature of the explosive column, and analyzing the thermal decomposition temperature rise characteristic of the explosive column of the initiating explosive material; the method has the advantages that the to-be-tested sample is close to the actual application condition, and the test result is high in accuracy.

The application belongs to the technical field of building coatings and relates to a styrene-acrylic emulsion, which comprises the following components in parts by mass: styrene 1-40 parts, butyl acrylate 1-30 parts, acid monomer 0.1-1 part, acrylamide 0.01-1 part, film-forming solvent 0.01-1 part, crosslinking agent 0.01-1 part, anionic emulsifier 0.1-2 parts, non-ionic emulsifier 0.1-2 parts, oxidizing agent 0.01-0.5 part, reducing agent 0.01-0.5 part, initiator 0.01-1 part, pH buffer 0.01-0.5 part, neutralizing agent 0.1-1 part, defoaming agent 0.02-1 part, preservative 0.02-1 part and water 44-56 parts. The application further provides a preparation method of the styrene-acrylic emulsion and application of the styrene-acrylic emulsion in interior wall coating. The interior wall coating prepared by using the styrene-acrylic emulsion does not need solvent, and the coating has excellent washability, low-temperature stability and wash resistance.

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.

The invention discloses an anti-cracking cement stabilized macadam mixture for a plateau road and a preparation method of the anti-cracking cement stabilized macadam mixture. The anti-cracking cement stabilized macadam mixture is prepared from the following raw materials in parts by weight: 3-5 parts of anti-cracking cement, 40-60 parts of modified high-titanium slag macadam, 25-45 parts of modified high-titanium slag sand and 11-15 parts of mixing water. According to the cement stabilized macadam mixture disclosed by the invention, low shrinkage of a cement hydrated hardened body is realized by virtue of the anti-crack cement, and the problem of rapid water loss of a hydration system caused by high-air-pressure and strong-wind drying in a plateau is solved by utilizing the internal curing effect of the modified high-titanium slag macadam; the early freezing resistance of the system is improved by introducing an early-strength anti-freezing component calcium formate into the modified high-titanium slag sand, so that the drying shrinkage and temperature shrinkage of the cement stabilized macadam are integrally reduced, the freezing resistance is improved, the durability of the cement stabilized macadam in a harsh and complex environment of a plateau is improved, and the service life of the cement stabilized macadam is prolonged.

This invention belongs to the field of sandpaper production technology, specifically relating to a lamination and packaging system and method for dust-free ceramic dry sandpaper. The invention features a pre-assembly mechanism, a sandpaper feeding mechanism, a release liner feeding mechanism, and a lamination and packaging mechanism working collaboratively. The sandpaper and release liner feeding mechanisms respectively achieve precise, non-adhesive, and quantitative material delivery in a single layer, with precise material alignment achieved through a positioning structure. The pre-assembly mechanism utilizes vacuum adsorption and mechanical pressure to pre-assemble the double-layer sandpaper with the release liner, avoiding direct friction damage to the abrasive layers. The lamination and packaging mechanism employs a circumferential ring-shaped film formed by adhesive coating and curing. This invention effectively solves the problems of sandpaper shedding, scratches, and dust accumulation during the packaging process of high-hardness ceramic abrasive sandpaper, ensuring the performance of dust-free sandpaper, significantly reducing the cost of lamination and packaging consumables, and offering high efficiency and excellent alignment accuracy in automated assembly and lamination operations. It is suitable for the standardized mass production of high-precision dust-free ceramic dry sandpaper.