584 results about "Polymer emulsion" patented technology

The invention discloses a cement-based aerogel heat preservation and heat insulation coating material for concrete and a spraying construction process of the cement-based aerogel heat preservation and heat insulation coating material, and belongs to the technical field of concrete materials. The coating material is prepared from powder, composite emulsion and water, and the powder is prepared by mixing superfine sand, cement, modified silicon dioxide-carbon nanotube composite aerogel powder, hollow glass beads, nanofibers, graphene nanosheets, an ultraviolet light absorber, a water reducing agent and a defoaming agent. The composite emulsion is composed of an acrylate copolymer emulsion, a polyvinyl acetate-ethylene emulsion, a temperature-sensitive polymer emulsion and a coalescing agent. Based on the multi-stage pore network and multi-component emulsion optimization design and multi-component synergistic effect, the material has good fluidity after being mixed, and has low heat conductivity coefficient, high strength and high toughness after being hardened; the construction technology of high-pressure water flushing and layered spraying is provided, and the method has the advantages of being efficient in construction, stable in quality and the like and can be applied to heat preservation and heat insulation of a concrete structure in a severe environment.

The invention belongs to the technical field of cement manufacturing, and particularly relates to high-strength weather-resistant environment-friendly cement and a preparation method thereof. The environment-friendly cement is prepared from the following raw materials in parts by mass: 40 to 55 parts of Portland cement, 15 to 25 parts of fly ash, 10 to 15 parts of slag powder, 6 to 12 parts of biomass reinforced composite mineral material, 2 to 4 parts of nano silicon dioxide, 1 to 4 parts of modified polymer emulsion and 1 to 3 parts of additive. The biomass reinforced composite mineral material is prepared from zeolite, bentonite, sepiolite and chitosan; the modified polymer emulsion comprises a modified polyacrylate emulsion and a modified polystyrene-butadiene emulsion in a mass ratio of (1-3): 1; the additive is prepared from basalt fiber, sodium lignin sulfonate, a rosin thermopolymer and sodium gluconate. The environment-friendly cement prepared by the invention not only has high strength and good weather resistance, but also remarkably reduces carbon footprint and saves natural resources.

The invention provides solid-waste-based fluid-state solidified soil and a preparation method of the solid-waste-based fluid-state solidified soil. The solid waste-based flow state solidified soil comprises a filling material, a framework material and a reinforcing material, the filling material comprises the following components in parts by weight: 60-95 parts of engineering residue soil, 5-40 parts of alkaline waste residues, 5-30 parts of a cementing material, 1-10 parts of a polymer emulsion, 0.5-3 parts of silica fume, 0.1-1 part of cellulose ether, 0.1-1 part of a compound water reducing agent and 0.5-2 parts of an exciting agent. The framework material comprises waste concrete blocks and / or waste brick blocks; the reinforcing material comprises a waste safety net and / or fiber gridding cloth. The flow-state solidified soil can achieve rapid backfilling in a narrow space, is excellent in shrinkage cracking resistance and impermeability, simple in preparation method and convenient to apply and construct, effectively solves the problems that the flow-state solidified soil is large in shrinkage, prone to cracking and the like, improves the quality of a backfilling project, achieves in-situ resource utilization of construction waste, and reduces the construction cost. And the construction cost of engineering can be reduced, and the problems of land occupation, environment pollution and the like caused by solid waste stacking are reduced.

The invention discloses a low-carbon polymer modified all-solid waste premixed fluid-state soil, which is prepared from the following components in parts by weight: 10-30 parts of low-carbon polymer modified all-solid waste premixed fluid-state soil, the concrete is prepared from the following components in parts by weight: 5-10 parts of a modifier, 5-10 parts of an exciting agent, 1-5 parts of an additive, 1-5 parts of a retarder, 10-20 parts of coal gangue powder, 10-20 parts of carbide slag, 10-20 parts of bentonite, 35-40 parts of fly ash, 35-40 parts of slag powder, 100 parts of clay powder, 145 parts of machine-made medium sand and 150 parts of water. According to the invention, the polymer polyacrylamide is added into the fluid soil, so that the compressive strength of the fluid soil stone body is improved; when the polyacrylamide is mixed with the fluid soil, active components in the polymer emulsion and components in the fluid soil are subjected to a cross-linking reaction to form a more complex network structure, so that a dispersion system of the slurry can be remarkably improved, the repulsive potential energy among particles in a multiphase dispersion is reduced, and the integrity and the stability of the slurry are enhanced; the slurry is not easy to separate when being injected into underground rock strata or fractures, and good uniformity and flowability are maintained.

The invention relates to the technical field of cement materials, in particular to a red-mud-containing steel slag composite cementing material and a preparation method thereof.The method comprises the steps that red mud, slag, steel slag, desulfurized gypsum and sulphoaluminate cement clinker are subjected to dry mixing to obtain an initial mixture; determining whether the excitation capability of the potential hydration activity reaches the standard or not based on the alkaline matching index, and adjusting the weight part of the sulphoaluminate cement clinker; adding a composite exciting agent to obtain activated slurry; determining whether the dispersion effect of the flocculation structure of the initial mixture is qualified or not based on the dispersion index of the flocculation structure, and adjusting the ball milling rotating speed; adding a polymer emulsion to obtain an initial composite cementing material; determining whether the synergistic enhancement effect of the polymer emulsion and the activated slurry is qualified or not based on the synergistic enhancement index, and adjusting the dripping rate of the polymer emulsion; the steel slag composite cementing material containing the red mud is obtained. The preparation stability of the red mud-containing steel slag composite cementing material is improved.

The present invention relates to an exposed water-based asphalt-based waterproof coating material and a preparation method therefor, and a waterproof laminate. The exposed water-based asphalt-based waterproof coating material comprises anionic emulsified asphalt, a polymer emulsion, a filler, and an auxiliary agent, wherein the anionic emulsified asphalt is prepared by melt-blending matrix asphalt with a composite weather-resistant additive and then emulsifying the resulting blend. The composite weather-resistant additive is a combination of an antioxidant and an ultraviolet absorbent in a mass ratio of 0.5-2:1, and the polymer emulsion is one of or a combination of more than one of a weather-resistant styrene-acrylic emulsion, a weather-resistant pure acrylic emulsion, and a weather-resistant silicone acrylic emulsion. By introducing the antioxidant and the ultraviolet absorbent into the anionic emulsified asphalt, the present invention improves the stability of a waterproof coating material system and avoids a demulsification phenomenon; moreover, by using a weather-resistant polymer emulsion in combination with a filler and an auxiliary agent, the weather resistance of the prepared waterproof coating material is greatly improved; furthermore, by means of the protective effect and the sunlight reflecting effect of white sintered sand adhered to a surface of the coating material, the waterproof system can be used as an exposed product for waterproof construction of buildings that have been in exposed environments for a long time.

The invention discloses a high-crack-resistance self-repairing sprayed concrete composition as well as a preparation method and application thereof. The composition comprises the following components in percentage by mass: 40%-50% of cement, 50%-60% of aggregate, 1%-2% of composite microfibers, 3%-5% of modified polymer emulsion, 1%-2% of an additive, 0.5%-1.5% of a nano reinforced phase and 2%-3% of a self-repairing microcapsule, and also comprises an anti-corrosion additive. The composite microfiber is a mixture of polypropylene and basalt microfiber, and the nano reinforced phase is a compound system of nano calcium carbonate and silicon dioxide. The preparation method comprises the steps of aggregate pretreatment, dry material mixing, wet material preparation, microcapsule introduction and injection molding, the aggregate is pretreated through a silane coupling agent, the cement is formed by compounding ordinary Portland cement and aluminate cement, and the modified polymer emulsion is modified through a siloxane monomer. According to the composition, through the synergistic effect of the composite microfibers, the self-repairing microcapsules and the nano reinforced phase, the crack resistance and the self-repairing capacity are improved, the composition is particularly suitable for a corrosive environment, and the service life of a structure can be prolonged.

The invention discloses a water-based acrylate pressure-sensitive adhesive emulsion as well as a preparation method and application thereof, and the preparation method comprises the following steps: S1, providing an acrylate pre-emulsion A and an initiator solution B; s2, dropwise adding a part of the acrylate pre-emulsion A into the initiator solution B, and carrying out a heating reaction to obtain a polymer A emulsion; s3, providing a monomer composition B, and mixing the rest of the acrylate pre-emulsion A and the monomer composition B to obtain an acrylate pre-emulsion B; and S4, dropwise adding the acrylate pre-emulsion B into the polymer A emulsion, and heating for reaction to obtain the water-based acrylate pressure-sensitive adhesive emulsion. The water-based acrylate pressure-sensitive adhesive emulsion prepared by the preparation method disclosed by the invention has relatively good adhesiveness, mobility and PVC shrinkage resistance after being coated on a PVC base material.

The invention discloses a carbon dioxide injection and production well cementation cement paste and a preparation method and application thereof, the well cementation cement paste comprises the following components by weight: 95-105 parts of oil well cement, 44-48 parts of water, 4-6 parts of a polymer emulsion, 4-6 parts of a self-repairing material, 1.5-2.5 parts of a drag reducer, 0.5-1.5 parts of a fluid loss agent and 0.2-0.8 part of an antifoaming agent; wherein the polymer emulsion is an emulsion which is formed by taking methyl methacrylate, vinyl trimethoxy silane and propylene carbonate as monomers through polymerization; the self-repairing material is a microcapsule in which thiobacillus ferrooxidans thalli and bacillus amyloliquefaciens thalli are embedded. The well cementation cement paste keeps good strength and relatively low permeability in a carbon dioxide environment, is good in corrosion resistance and has self-repairing capability.

The invention belongs to the technical field of oilfield auxiliaries, and particularly relates to an oil-soluble demulsifier for a heavy oil field and a preparation method of the oil-soluble demulsifier. The oil-soluble demulsifier for the heavy oil field, provided by the invention, is prepared from a block polymer emulsion, nonylphenol polyoxyethylene ether, modified nanoparticles and a cross-linking agent. According to the invention, methoxystyrene, dodecyl vinyl ether, N, N-dimethylaminopropyl acrylamide and 2-acrylamide-2-methylpropanesulfonic acid are adopted to prepare a quaternary block comb-shaped polymer, the quaternary block comb-shaped polymer and nonylphenol polyoxyethylene ether are subjected to molecular-level cross-linking through a cross-linking agent, nano modified particles are added, and the quaternary block comb-shaped polymer is prepared. The prepared demulsifier can be rapidly adsorbed on an oil-water interface and respectively adsorb an oil phase and a water phase, so that the tension of the oil-water interface is reduced, rapid separation of the oil phase and the water phase is realized, and the demulsification performance is improved.

The invention discloses a preparation method of high-stability modified emulsified asphalt, and particularly relates to the technical field of asphalt materials, which comprises the following steps (by weight): S01, mixing 30-50 parts by weight of styrene-butadiene latex with the solid content of 45-60%, 10-25 parts by weight of acrylate copolymer emulsion with the glass transition temperature of-20-10 DEG C and 0.5-8 parts by weight of silane coupling agent to obtain a mixture A; a mixed emulsion is obtained; s02, adding 8-15 parts by weight of matrix asphalt, 2-8 parts by weight of a maleic anhydride grafted polypropylene compatilizer with the grafting rate of 1.0%-2.5% and a stabilizer into the mixed emulsion, and performing high-speed shearing at the rotating speed of 3000-5000 rpm for 20-40 min to obtain the modified polymer emulsion. According to the invention, the storage stability, the thermal stability and the interface bonding strength are improved.

The invention relates to the technical field of thermal insulation materials, and discloses a polyurethane foam material and a preparation method and application thereof, the polyurethane foam material is prepared from a raw material composition containing polyol, isocyanate, a catalyst, a polymer microsphere emulsion and a filler; the filler contains one or more than two of aerogel, fumed silica and polymer microspheres; the polymer microsphere emulsion is prepared by adopting a soap-free emulsion polymerization method, the preparation raw materials of the polymer microsphere emulsion comprise an oleophylic polymeric monomer and an amphiphilic polymeric monomer, and the polymer microsphere is prepared by drying the polymer microsphere emulsion. According to the invention, the polymer microsphere emulsion is used as a foaming agent, and the polymer emulsion does not contain fluorine and a traditional surfactant, so that the prepared polyurethane foam material is low in heat conductivity coefficient and density, good in heat preservation and heat insulation performance and environment-friendly, and meanwhile, the strength of polyurethane foam can also be improved; by adding the filler, the heat conductivity coefficient of the polyurethane foam material can be further reduced, and the thermal insulation performance of the polyurethane foam material is improved.

The invention discloses a polymer emulsion composite modified road base material and a preparation method thereof, and belongs to the technical field of traffic infrastructure engineering materials. The polymer emulsion composite modified road base material is prepared from the following raw materials: graded aggregate, super sulfate cement or geopolymer cement, water for mixing, vinyl acetate-ethylene (VAE) copolymer emulsion and a silane coupling agent. The preparation method comprises the following steps: mixing the VAE emulsion with water for mixing to obtain a polymer diluent; mixing graded aggregate with an inorganic cementing material, then adding the polymer diluent, and mixing to obtain a mixture; and then paving, compacting, forming and curing are carried out. By forming a VAE flexible network-C-S-H / ettringite hybrid network, the material has the remarkable advantages of higher mechanical strength and low cost, and can greatly improve and enhance the crack resistance and durability of the road base.

The invention discloses an exposed polymer cement waterproof coating with a permeable crystallization function and a preparation method thereof. The waterproof coating comprises a component A and a component B, the component A comprises acrylic polymer emulsion, fluorocarbon emulsion, methyl silicic acid, soluble inorganic silicate and other auxiliaries; and the component B comprises cement, a filler, a geopolymer, a nanoscale silicon-containing compound, cellulose ether and an optional pigment. The waterproof coating disclosed by the invention has the functions of repairing structural cracks by permeable crystallization in the structure and enhancing the waterproof function of the structure; the high-elasticity and high-strength coating film outside the structure has an external waterproof effect, and the structure is protected; and meanwhile, the comprehensive long-acting waterproof effect is achieved through the self-repairing function when the coating film is broken. The LED lamp has exposure performance, and is particularly suitable for maintenance engineering needing to be exposed and repaired.

The invention relates to the technical field of plate electrodes, in particular to a plate electrode based on a polymer and a conductive micro-nano material and a preparation method of the plate electrode, the plate electrode comprises the polymer and the conductive micro-nano material, the polymer is one or two of a polymer plate and a polymer emulsion, and the particle size of the conductive micro-nano material is one or more of 40 nm to 10 [mu] m. According to the plate electrode based on the polymer and the conductive micro-nano material and the preparation method of the plate electrode, the plate electrode prepared from the conductive micro-nano materials with different particle sizes has relatively low surface resistivity and relatively high oxygen evolution potential, and can meet application requirements of specific places such as water treatment, electrochemical preparation of graphene and the like.

The invention relates to the technical field of batteries, in particular to a lithium ion battery diaphragm and a preparation method thereof.The lithium ion battery diaphragm comprises a porous base membrane and a high-temperature-resistant bonding coating covering the surface of one side or two sides of the porous base membrane; the high-temperature-resistant bonding coating is prepared from the following raw materials in parts by weight: 15-20 parts of modified polymer emulsion, 60-80 parts of inorganic nano ceramic particles, 3-5 parts of fiber polymer, 3-5 parts of a binder, 0.1-0.5 part of an auxiliary agent and 20-30 parts of deionized water. According to the lithium ion battery diaphragm provided by the invention, through the modified polymer emulsion, the air permeability value after cold pressing and the cold pressing cohesive force are improved; meanwhile, the inorganic nano ceramic particles and the fiber polymer are added, so that the high-temperature resistance of the diaphragm is improved, and the safety performance and the cycle performance of the battery are effectively improved.

The invention relates to a production process of an ultra-strong freezing-resistant impervious artificial pavement brick, which comprises the following steps: S1, raw material preparation: selecting and proportioning the following raw materials in percentage by mass: 25-35% of cement which adopts P.O42.5 ordinary Portland cement; 15%-25% of a mineral admixture which is any one of fly ash or slag; the anti-freezing property, the anti-permeability, the strength and the durability of the brick body are remarkably improved through accurate proportioning and use of specific raw materials and interaction of the specific raw materials, the microstructure of the brick body can be effectively improved through use of specific functional materials such as the expanding agent, the nano silicon dioxide and the polymer emulsion, and the anti-freezing property of the brick body is improved. According to the pavement brick manufactured by the process, the low mass loss and the high compressive strength of the brick body are maintained in the freezing and thawing cycle process, the compressive strength loss of the brick body after 50 times of freezing and thawing cycles can be ensured not to exceed 15%, and no visible crack appears, so that the pavement brick manufactured by the process has excellent durability.

The invention relates to the field of building materials, and discloses high-toughness and high-energy-absorption polymer emulsion modified mortar and a preparation method thereof, and the mortar is composed of ordinary Portland cement, river sand, a polymer emulsion, water, an active admixture and chopped fibers. Wherein the polymer emulsion is selected from styrene-acrylic emulsion (SBR), ethylene-vinyl acetate (EVA), polyurethane emulsion or a combination thereof; the mixing amount is 5-20wt% of the mass of the cementing material. According to the invention, a viscoelastic network is formed in a cement matrix through the polymer emulsion, and the synergistic effect of the active admixture and the chopped fibers is combined, so that the bonding strength, the crack resistance, the impact resistance and the stress wave dissipation capability of the mortar are remarkably improved. Test results show that the mortar provided by the invention is obviously superior to ordinary mortar in the aspects of 28d breaking strength, impact toughness and stress wave attenuation performance, and is suitable for high-performance constructional engineering and protective engineering.

The invention provides a high-solid-content styrene-butadiene latex synthesis process which comprises the following steps: (1) mixing and shearing butadiene, styrene, vinyl amide and a polyfunctional group crosslinking monomer to prepare a mixed monomer; (2) adding deionized water, an emulsifier and a mixed monomer accounting for 30-60% of the total weight into the reaction kettle, vacuumizing, adding an initiator at the temperature of 5-15 DEG C, reacting for 1-1.5 hours, dropwise adding the rest of the mixed monomer for 6-10 hours, and after dropwise adding, carrying out polymerization reaction at the temperature of 40-60 DEG C for 3-4 hours to obtain the low-solid-content styrene-butadiene latex; and (3) adding an auxiliary agent inorganic salt and an organic concentrating agent into the low-solid-content styrene-butadiene latex, carrying out flash evaporation, and treating by a stripping tower to obtain the high-solid-content styrene-butadiene latex. While the solid content of the latex is increased, the viscosity of polymer emulsion, the size of latex particles, the particle size interval distribution and the like can be effectively controlled.

The invention discloses a preparation method of a waterborne polyurethane dispersion with excellent corrosion resistance, which comprises the following steps: (1) firstly carrying out vacuum dehydration on polyol, a micromolecular polyhydroxy chain extender and a hydrophilic chain extender, and then adding polyisocyanate to carry out polymerization reaction; the preparation method comprises the following steps: firstly, adding an alkynyl silane coupling agent into a reaction kettle, then adding micromolecular diol, diol containing an alkynyl side chain and a micromolecular diamine chain extender, carrying out a chain extension reaction, and finally, adding a monoamino silane coupling agent, and carrying out an end capping reaction, so as to prepare a polyurethane polymer; (2) dispersing the polyurethane polymer solution into water to obtain a polymer emulsion; and (3) adding a dithiol compound and an initiator into the polymer emulsion, so that an alkyne group on a polymer side chain and a sulfydryl of thiol are subjected to a click coupling reaction, and the waterborne polyurethane dispersion with the side chain containing free sulfydryl is obtained. According to the invention, the micromolecular mercaptan corrosion inhibitor is grafted to a side chain of a waterborne polyurethane molecule, and the obtained waterborne polyurethane has significantly improved corrosion resistance.

The invention provides a polycarboxylate superplasticizer for UHPC (Ultra High Performance Concrete) and a preparation method thereof, the polycarboxylate superplasticizer for UHPC is prepared from the following components in parts by weight: 60 to 80 parts of polycarboxylate superplasticizer, 50 to 60 parts of viscosity reduction mother liquor, 0.05 to 0.12 part of defoaming agent, 2 to 5 parts of hydration temperature rise inhibitor, 5 to 8 parts of polymer emulsion, 0.01 to 0.05 part of air entraining agent and 100 to 120 parts of water. The polycarboxylate superplasticizer for UHPC is prepared from the specific components including the polycarboxylate superplasticizer, the viscosity reduction mother liquor, the defoaming agent, the hydration temperature rise inhibitor, the polymer emulsion, the air entraining agent and the like according to a certain ratio, has the effects of water reduction, viscosity reduction and shrinkage reduction through compounding, has an ultrahigh water-reducing rate, and can reduce the viscosity among the components of concrete and reduce the shrinkage while the strength of the concrete is not influenced; the comprehensive performance of the UHPC is effectively adjusted, the method is suitable for large-scale popularization and industrial production, remarkable environmental benefits and economic values are shown, and the method has positive significance in promoting sustainable development of the building industry.

The invention discloses a polymer emulsion preparation method capable of reducing monomer residual quantity, which comprises the following steps: S1, mixing a main monomer, a hard monomer, a functional monomer, an oil-soluble peroxide initiator, a first part of emulsifier and a first part of deionized water, and pre-emulsifying to obtain pre-emulsified liquid; s2, dividing the water-soluble initiator into two parts: a first part of the water-soluble initiator and a second part of the water-soluble initiator, wherein the second part of the water-soluble initiator is prepared into a water-soluble initiator solution; adding the remaining second part of the emulsifier and the second part of the deionized water into the reaction kettle, stirring, heating, and adding the pH regulator and the first part of the water-soluble initiator; adding part of the pre-emulsion into a reaction kettle, and then dropwise adding the rest of the pre-emulsion and a water-soluble initiator solution; s3, preparing a reducing agent into a reducing agent aqueous solution, dropwise adding the reducing agent aqueous solution into the reaction kettle, and heating for reaction after dropwise adding is completed; and S4, cooling and filtering to obtain the polymer emulsion with low monomer residual quantity.

The present invention belongs to the field of new materials and discloses a method for preparing a hydrophobically modified thickener. The method comprises the following steps: Step 1: subjecting a portion of a hydrophobically associating monomer, a portion of a hydrophilic monomer, a portion of a hydrophobic monomer, and a reactive emulsifier to a free radical emulsion polymerization reaction, and after completion of the reaction, adjusting the pH of the reaction system to 4 to 7; Step 2: adding the remaining hydrophobically associating monomer, hydrophilic monomer, and hydrophobic monomer to the reaction system to conduct a free radical emulsion polymerization reaction. This method produces a polymer emulsion with excellent stability, which can maintain long-term stability under high and low temperature conditions. The present invention also discloses a hydrophobically modified thickener and its application.

The invention relates to the field of polymer emulsions, and particularly discloses a waterborne polyurethane modified acrylate composite emulsion and a preparation method thereof. The waterborne polyurethane modified acrylate composite emulsion is prepared from the following raw materials in parts by weight: 20 to 40 parts of castor oil-based polyurethane prepolymer, 20 to 40 parts of acrylate monomer, 0.5 to 1 part of composite initiator, 0.5 to 0.8 part of chain extender, 1 to 3 parts of neutralizer, 30 to 50 parts of water and 10 to 20 parts of silica sol, according to the waterborne polyurethane modified acrylate composite emulsion prepared in the invention, the castor oil-based polyurethane prepolymer is adopted to provide active sites for graft copolymerization of waterborne polyurethane and acrylate monomers, so that the crosslinking degree of the polymer is improved, and the film forming uniformity and water resistance of a film are improved.

The invention relates to the field of non-electric refrigeration coatings, and provides a non-electric refrigeration coating and a use method and a preparation method thereof in order to solve the problem that in the prior art, when the coating refrigeration effect is achieved through tetrahedral radiation refrigeration filler, the coating is difficult to be used in the use environment with large pressure. Comprising 40-60 parts of a polymer emulsion, 20-40 parts of a tetrahedral radiation refrigeration filler, 8-12 parts of titanium dioxide, 6-10 parts of hollow glass beads, 15-30 parts of silicon carbide, 6-10 parts of cubic boron nitride and 10-15 parts of water. The tetrahedral radiation refrigeration filler is zirconium oxide; the minimum height of the silicon carbide and the cubic boron nitride is greater than the maximum height of the tetrahedral radiation refrigeration filler. According to the invention, the refrigeration principle of the tetrahedral radiation refrigeration filler is utilized, the silicon carbide and the boron nitride are additionally added, the boron nitride has good visible light and ultraviolet reflectivity, and the high refractive index of the silicon carbide can make up for the reduction of the dosage of titanium dioxide and enhance scattering, so that the coating formed by the coating has better pressure resistance and wear resistance.

The invention belongs to the field of constructional engineering materials, and relates to uncovering self-compacting concrete as well as a preparation method and application thereof. The uncovering self-compacting concrete comprises a liquid material and a dry material; the liquid material contains a water reducing agent, a slump retaining agent, a thickening time control agent, a defoaming agent, a polymer emulsion, a beautifying agent, a viscosity reducer, water, and optional air entraining agent, stabilizer and preservative; the dry material contains glass powder, glass sand, cement, broken stone, gypsum, an expanding agent, gas-phase nano silicon dioxide toughened high-strength micro powder, modified sulfonated phenolic resin and a viscosity modifier. According to the uncovering self-compacting concrete disclosed by the invention, the problem of high bleeding rate caused when a polycarboxylic acid water reducer and a slump retaining agent are applied to production of the uncovering self-compacting concrete can be perfectly solved through synergistic cooperation of all the components, and meanwhile, the advantages of high transparency and strong scratch resistance caused by replacement of an admixture with a regenerated glass material are reserved; the strength of the uncovering self-compacting concrete is effectively reduced, the bleeding rate is reduced, and the setting time is prolonged.

The invention discloses a bio-based polymer emulsion as well as a preparation method and application thereof, and belongs to the technical field of aqueous polymer emulsions. The emulsion comprises an aqueous continuous phase, bio-based polymer particles, a stabilizing system, and a bionic catechol adhesion component. Specific modified starch is innovatively utilized for assistance, and a bionic adhesion shell layer is constructed on the surface of a bio-based polymer core in situ. Compared with similar products in the market that adhesion to inert substrates can be improved only by adding a large amount of tackifying components, the scheme has the advantages that excellent dry and wet adhesion can be realized on the surfaces of difficult-to-adhere substrates such as polypropylene and polyethylene only by constructing an extremely thin interface functional layer, and the functionalization efficiency and economical efficiency of the bio-based material are greatly improved. Meanwhile, the system effectively overcomes the industrial problem that the high-solid-content emulsion is easy to settle, has excellent storage stability and construction adaptability, and conforms to the development trend of sustainable barrier packaging and high-performance water-based coatings in the future.

The invention relates to the field of building materials, in particular to high-durability and high-permeability-resistance mortar and a preparation method thereof.The high-durability and high-permeability-resistance mortar is prepared from, by weight, 40-60 parts of cement, 20-40 parts of quartz sand or machine-made sand, 10-20 parts of fly ash or mineral powder, 2-5 parts of polymer emulsion, 1-3 parts of an anti-permeability agent, 0.2-1 part of a water reducing agent, 0.1-0.5 part of a water-retention thickening agent and water; wherein the water cement ratio is controlled to be 0.30 to 0.35. Through collaborative optimization of multiple components, the compactness, impermeability, crack resistance and durability of the mortar are remarkably improved, the preparation process is simple and convenient, the raw materials are easy to obtain, and the mortar has excellent comprehensive performance and wide application prospects.

The invention discloses a method for regulating and controlling the volume stability of ECC by adopting CFB ash, which comprises the following steps: (1) mixing cement, CFB ash, fly ash and fine aggregate, and uniformly stirring to obtain a dry material; (2) mixing water, a water reducing agent and a polymer emulsion, adding the mixture into the dry material, and uniformly stirring to obtain slurry; and adding fibers into the slurry, and stirring until the fibers are completely dispersed to obtain the modified ECC material. The invention provides a method for regulating and controlling the volume stability of ECC by adopting CFB ash. The method can improve the volume stability of ECC.

The invention relates to the field of overlay materials, in particular to a two-component overlay material suitable for a modified asphalt concrete pavement and a preparation method of the two-component overlay material. The two-component overlay material suitable for the modified asphalt concrete pavement comprises the following raw materials: a component A: a polymer emulsion, a composite additive, a silane coupling agent, a film-forming agent, an ultraviolet absorbent, a stabilizer and the like; the component B is a polyisocyanate curing agent. The finally prepared two-component overlay material can simultaneously give consideration to comprehensive properties such as adhesion, hydrolysis resistance, weather resistance and saline-alkaline resistance, the phenomenon that other properties are greatly sacrificed for a certain prominent property is avoided, and the overlay material can be ensured to be popularized and applied in various environments and harsh working conditions; the technical level of modified asphalt concrete pavement maintenance is greatly improved, and the application effect is excellent.