A stripping self-compacting concrete and a preparation method and application thereof

Abstract

The application belongs to the field of building engineering materials, and relates to a stripping self-compacting concrete as well as a preparation method and application thereof. The stripping self-compacting concrete comprises liquid materials and dry materials. The liquid materials contain water reducing agents, slump keepers, setting regulators, defoaming agents, polymer emulsions, beautifying agents, viscosity reducing agents and water, and optionally contain air entraining agents, stabilizers and preservatives. The dry materials contain glass powder, glass sand, cement, gravel, gypsum, expanding agents, gas-phase nano-silica toughening high-strength micro powder, modified sulfonated phenolic aldehyde resin and viscosity modifiers. The stripping self-compacting concrete can solve the problem of high bleeding rate caused by the application of polycarboxylic acid water reducing agent and slump keepers in the production of the stripping self-compacting concrete through the synergistic cooperation of the components, and effectively improve the strength reduction, reduce the bleeding rate and prolong the setting time of the stripping self-compacting concrete while retaining the advantages of high transparency and strong scratch resistance caused by the replacement of the recycled glass material with admixtures.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of building engineering materials, and particularly relates to a self-compacting concrete for uncovering a plate and a preparation method and application thereof. BACKGROUND

[0002] Self-compacting concrete refers to concrete which can flow and compact under its own weight, completely fill the formwork even in the presence of dense reinforcement, and simultaneously achieve good homogeneity, and does not require additional vibration. As early as the 1970s, Europe began to use slightly vibrated concrete, but until the late 1980s, SCC was developed in Japan. The main reason for the development of SCC in Japan is to solve the contradiction between the reduction of skilled workers and the improvement of the durability of concrete structures. Europe first used self-compacting concrete in Swedish traffic network civil engineering in the mid-1990s. Subsequently, the European Community established a multi-country cooperative self-compacting concrete guidance project. Since then, the application of self-compacting concrete has generally increased throughout Europe. The outstanding feature of self-compacting concrete is that the mixture has good workability, and can be uniformly and densely filled and formed only by relying on its own weight without vibration even under the conditions of dense reinforcement and complex shape or under the conditions of great difficulty in pouring and vibration, which brings great convenience to construction operation. At the same time, it has the technical and economic effects of improving the construction environment, speeding up the construction progress, improving the labor productivity, and reducing the project cost, and is called "the most revolutionary development of concrete technology in recent decades".

[0003] With the continuous development of related technologies, various self-compacting concretes have gradually emerged and successfully applied in large-scale projects such as housing construction, water conservancy, bridges, tunnels and railways. Among them, self-compacting concrete for high-speed railway CRTS III type slab ballastless track, which is the most difficult type of self-compacting concrete, has been determined to be used in multiple project constructions. The design strength grade of the self-compacting concrete project is C40, which should have very low viscosity, good fluidity and workability, and the apparent requirement for form removal is smooth and clean, uniform in color, no obvious bubbles and water lines. However, the concrete mixture has the characteristics of low water-binder ratio, high sand ratio, and large amount of cementitious materials, and the use of ordinary polycarboxylic acid high-performance water reducing agent often causes problems such as slow dispersion speed, bleeding, floating slurry, poor workability, high viscosity and many bubbles, which cannot meet the construction requirements and seriously affect the project construction progress.

[0004] As for the existing disclosed self-compacting concrete product formula, its components can be roughly divided into six kinds, namely cementitious material, mineral aggregate, setting regulator, waterproofing agent, rheological agent and modified component. Among them, ordinary Portland cement, sulphoaluminate cement, high-alumina cement or white cement components can be selected as the cementitious material of the self-compacting concrete according to different functions to give the self-compacting concrete excellent compressive, flexural and bonding strength. At the same time, the self-compacting concrete particle size distribution needs to use relatively coarse fillers (such as machine-made sand and river sand) and finer admixtures (such as finely ground calcium carbonate powder) to achieve the best compactness effect. The self-compacting concrete can also add early strength agent and setting accelerator to improve the early cement setting strength, and can also slow down the setting speed of gypsum by using a retarder to prolong the operable time of the self-compacting concrete. When the redispersible glue powder and emulsion act on the self-compacting concrete, the self-compacting concrete can be modified to form a solid polymer film, improve the flowability, tensile strength and flexural strength of the self-compacting concrete, and also can reduce the elastic modulus and reduce the internal stress of the self-compacting concrete system.

[0005] The raw materials of the self-compacting concrete are rich in sources, such as machine-made sand, river sand, quartz sand, stone powder and ceramic powder, which can be used to prepare the self-compacting concrete, among which machine-made sand is the most common. At the same time, with the enrichment of various raw material sources and the in-depth research of related formula technology, recycled glass material is gradually becoming a new research direction of self-compacting concrete product due to its stable acid and alkali resistance, chemical inertness and low expansion coefficient. The recycled glass material has small particle size, good dispersibility, high transparency, good anti-settling effect, good affinity and strong steric hindrance, which can be easily dispersed in the self-compacting concrete system, increase the fullness of the self-compacting concrete after film forming, maintain clear transparency, and provide good scratch resistance. However, the recycled glass material applied in the self-compacting concrete has the problems of low strength, high bleeding rate and long setting time. The reason is that although the recycled glass material has good gradation, its surface morphology is relatively smooth, and the cement reaction activity is lower than that of fly ash and mineral powder, so that the combination ability of cementitious material and aggregate is weakened, and the time required for the mutual connection of cement particles in the self-compacting concrete system to form a skeleton structure is prolonged. SUMMARY

[0006] The first object of the present application is to provide a new self-compacting concrete to solve the problem of high bleeding of self-compacting concrete after using ordinary polycarboxylic acid water reducer, and to make up for the defects of reduced concrete strength, high bleeding rate and long setting time after using recycled glass material to replace admixture.

[0007] The second object of the present application is to provide a preparation method of the self-compacting concrete.

[0008] The third object of the present application is to provide the application of the self-compacting concrete in the field of construction.

[0009] Specifically, the self-compacting concrete comprises liquid material and dry material; the liquid material comprises water reducing agent 170-180 parts by weight, slump retaining agent 40-90 parts by weight, setting time adjusting agent 40-60 parts by weight, defoaming agent 0.1-2 parts by weight, polymer emulsion 10-30 parts by weight, beautifying agent 10-40 parts by weight, viscosity reducing agent 20-40 parts by weight, and water 500-650 parts by weight, and optionally air entraining agent 0-10 parts by weight, stabilizer 0-10 parts by weight, and preservative 0-10 parts by weight; the setting time adjusting agent is at least one selected from calcium nitrate, triisopropanolamine, sodium fluoride, potassium fluoride, sodium formate, potassium formate, citric acid, sodium hexametaphosphate, potassium hexametaphosphate, sodium gluconate, potassium gluconate, and maltodextrin; the defoaming agent is polyether modified silicone oil; and the polymer emulsion is organic silicon modified styrene and acrylate copolymer emulsion; the dry material comprises glass powder 50-130 parts by weight, glass sand 600-700 parts by weight, cement 350-400 parts by weight, crushed stone 800-900 parts by weight, gypsum 50-80 parts by weight, expanding agent 30-50 parts by weight, fumed nano-silica toughening high-strength micro powder 70-100 parts by weight, modified sulfonated phenolic resin 30-50 parts by weight, and viscosity modifier 30-40 parts by weight.

[0010] The preparation method of the self-compacting concrete comprises uniformly mixing components of the liquid material to obtain the liquid material; and uniformly mixing components of the dry material to obtain the dry material.

[0011] The self-compacting concrete of the present application is modified by using specific types and contents of setting time adjusting agent, polyether modified silicone oil and polymer emulsion, beautifying agent, viscosity reducing agent, and optionally air entraining agent, stabilizer and preservative, and by using specific contents of fumed nano-silica toughening high-strength micro powder, modified sulfonated phenolic resin and viscosity modifier, so that the problem of high bleeding rate caused by the application of polycarboxylic acid water reducing agent and slump retaining agent in the production of the self-compacting concrete can be perfectly solved, and the advantages of high transparency and strong scratch resistance caused by the replacement of admixture with recycled glass material can be retained, so that the strength of the self-compacting concrete is effectively reduced, the bleeding rate is reduced, and the setting time is prolonged, and the obtained self-compacting concrete meets the requirements of relevant standards such as T / CECS203 “Technical Specification for Application of Self-compacting Concrete”, QC / R 596 “Self-compacting Concrete for CRTS III Type Slab Ballastless Track of High-speed Railway”, TB / T3275 “Railway Concrete”, GB 8076 “Concrete Admixture”, JGJ / T 283 “Technical Specification for Application of Self-compacting Concrete”, and T / CCES 02 “Guidelines for Design and Construction of Self-compacting Concrete”. DETAILED DESCRIPTION

[0012] The self-compacting concrete provided by the present application comprises liquid material and dry material. The mass ratio of the liquid material to the dry material is preferably (0.3-3):(100-500), such as 0.3:100, 0.5:100, 1:100, 1.5:100, 2:100, 2.5:100, 3:100, 0.3:200, 0.5:200, 1:200, 1.5:200, 2:200, 2.5:200, 3:200, 0.3:300, 0.5:300, 1:300, 1.5:300, 2:300, 2.5:300, 3:300, 0.3:400, 0.5:400, 1:400, 1.5:400, 2:400, 2.5:400, 3:400, 0.3:500, 0.5:500, 1:500, 1.5:500, 2:500, 2.5:500, 3:500, or any value therebetween. In addition, the self-compacting concrete generally contains additional water. The mass ratio of the liquid material to the additional water is preferably (0.3-3):(10-20), such as 0.3:10, 0.5:10, 1:10, 1.5:10, 2:10, 2.5:10, 3:10, 0.3:15, 0.5:15, 1:15, 1.5:15, 2:15, 2.5:15, 3:15, 0.3:20, 0.5:20, 1:20, 1.5:20, 2:20, 2.5:20, 3:20, or any value therebetween. The self-compacting concrete has good working performance in an environment of 0-50°C, and is environmentally friendly and non-polluting.

[0013] In the present application, the liquid material contains water reducing agent, slump retaining agent, setting time adjusting agent, defoaming agent, polymer emulsion, beautifying agent, viscosity reducing agent and water, and optionally air entraining agent, stabilizer and preservative. The content of the water reducing agent is 170-180 parts by weight, such as 170, 172, 175, 178, 180 parts by weight or any value between them; the content of the slump retaining agent is 40-90 parts by weight, such as 40, 50, 60, 70, 80, 90 parts by weight or any value between them; the content of the setting time adjusting agent is 40-60 parts by weight, such as 40, 45, 50, 55, 60 parts by weight or any value between them; the content of the defoaming agent is 0.1-2 parts by weight, such as 0.1, 0.2, 0.4, 0.6, 0.8, 1, 1.2, 1.4, 1.6, 1.8, 2 parts by weight or any value between them; the content of the polymer emulsion is 10-30 parts by weight, such as 10, 15, 20, 25, 30 parts by weight or any value between them; the content of the beautifying agent is 10-40 parts by weight, such as 10, 15, 20, 25, 30, 35, 40 parts by weight or any value between them; the content of the viscosity reducing agent is 20-40 parts by weight, such as 20, 25, 30, 35, 40 parts by weight or any value between them; the amount of water is 500-650 parts by weight, such as 500, 520, 540, 560, 580, 600, 620, 650 parts by weight or any value between them; the content of the air entraining agent is 0-10 parts by weight, such as 0, 0.1, 0.2, 0.4, 0.6, 0.8, 1, 2, 4, 6, 8, 10 parts by weight or any value between them; the content of the stabilizer is 0-10 parts by weight, such as 0, 0.1, 0.2, 0.4, 0.6, 0.8, 1, 2, 4, 6, 8, 10 parts by weight or any value between them; the content of the preservative is 0-10 parts by weight, such as 0, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 7, 8, 9, 10 parts by weight or any value between them.

[0014] In the present application, the dry material contains glass powder, glass sand, cement, gravel, gypsum, expanding agent, gas-phase nanometer silica toughening high-strength micro powder, modified sulfonated phenolic resin and viscosity modifier. The content of the glass powder is 50-130 parts by weight, such as 50, 60, 70, 80, 90, 100, 110, 120, 130 parts by weight or any value between them; the content of the glass sand is 600-700 parts by weight, such as 600, 620, 640, 660, 680, 700 parts by weight or any value between them; the content of the cement is 350-400 parts by weight, such as 350, 360, 370, 380, 390, 400 parts by weight or any value between them; the content of the gravel is 800-900 parts by weight, such as 800, 820, 840, 860, 880, 900 parts by weight or any value between them; the content of the gypsum is 50-80 parts by weight, such as 50, 60, 70, 80 parts by weight or any value between them; the content of the expanding agent is 30-50 parts by weight, such as 30, 35, 40, 45, 50 parts by weight or any value between them; the content of the gas-phase nanometer silica toughening high-strength micro powder is 70-100 parts by weight, such as 70, 75, 80, 85, 90, 95, 100 parts by weight or any value between them; the content of the modified sulfonated phenolic resin is 30-50 parts by weight, such as 30, 35, 40, 45, 50 parts by weight or any value between them; the content of the viscosity modifier is 30-40 parts by weight, such as 30, 32, 34, 36, 38, 40 parts by weight or any value between them.

[0015] In the present application, the water reducing agent is preferably a short main chain long side chain polycarboxylic acid type grafted multi-copolymer. The slump retaining agent is preferably a long main chain short side chain polycarboxylic acid type grafted multi-copolymer. The main role of the water reducing agent and slump retaining agent is to adsorb on the surface of cement particles, and the particles repel each other due to the same charge, so that the cement particles are dispersed to release the excess water between the particles to produce water reducing effect. The water reducing agent and slump retaining agent can form an adsorption film on the surface of the cement particles, thereby delaying the hydration process of the cement, making the growth of cement stone crystals more perfect, reducing the capillary voids generated by water evaporation, and improving the strength, hardness and structural density of the concrete.

[0016] In the present application, the role of the setting regulator is to adjust the setting time of the stripping self-compacting concrete, prevent the concrete from appearing rapid setting or super slow setting problems, and improve the strength of the concrete through alkali activation. The setting regulator is selected from at least one of calcium nitrate, triisopropanolamine, sodium fluoride, potassium fluoride, sodium formate, potassium formate, citric acid, sodium hexametaphosphate, potassium hexametaphosphate, sodium gluconate, potassium gluconate and maltodextrin.

[0017] In the present application, the main function of the defoaming agent is to destroy the elastic film of the harmful bubbles in the concrete and inhibit the generation of the harmful bubbles; if the harmful bubbles have been generated, the defoaming agent particles will immediately capture the hydrophobic chain end on the surface of the foam after contacting the foam, then spread to form a very thin double film layer, further diffuse and layer invades, replaces the film wall of the original foam, and destroys the mechanical balance of the directional film under the strong traction of the film layer with large surface tension around, thereby achieving the effect of breaking and inhibiting the bubbles, and improving the strength of the concrete. The defoaming agent is preferably polyether modified silicone oil.

[0018] In the present application, the polymer emulsion is a silicone modified styrene and acrylate copolymer emulsion. The silicone modified styrene and acrylate copolymer emulsion is preferably a silicone-styrene-acrylate terpolymer emulsion. In a preferred embodiment, the silicone-styrene-acrylate terpolymer emulsion is prepared by emulsion polymerization of an unsaturated silicone monomer, a styrene monomer and an acrylic acid / ester monomer. The emulsion polymerization is preferably performed by dissolving a composite emulsifier I, an acrylic acid / ester monomer and a styrene monomer in water to obtain a pre-emulsion; dissolving an initiator in water to obtain an initiator solution; dissolving a bicarbonate and a composite emulsifier II in water and heating to 50-70°C, adding part of the pre-emulsion and part of the initiator solution, and then heating to 75-80°C for reaction until the liquid turns blue; dissolving the unsaturated silicone monomer in the remaining pre-emulsion, dropping into the remaining initiator solution, and then reacting after dropping is completed; and cooling to below 40°C and adjusting the pH value to 7-8 after reaction is completed, and then filtering to obtain the silicone-styrene-acrylate terpolymer emulsion. The molar ratio of the unsaturated silicone monomer, the styrene monomer and the acrylic acid / ester monomer is preferably (1-6):(1-10):(1-10). The unsaturated silicone monomer can be vinyltrimethoxysilane and / or vinyltriethoxysilane. The styrene monomer can be styrene and / or methylstyrene. The acrylic acid / ester monomer can be at least one selected from the group consisting of acrylic acid, methacrylic acid, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate and butyl methacrylate. The emulsifier used in the emulsion polymerization is preferably a composite emulsifier obtained by compounding nonylphenol polyoxyethylene ether and sodium dodecyl sulfate at a mass ratio of (2-5):1.

[0019] In the present application, the beautifying agent is preferably a dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafting multi-copolymer. In a preferred embodiment, the beautifying agent is prepared by grafting copolymerization of polyoxyethylene sorbitan monooleate, dodecanol, and dodecenyl succinic anhydride under the action of concentrated sulfuric acid and an organic amine to obtain a dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafting multi-copolymer. When the dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafting multi-copolymer is applied as a beautifying agent in concrete, it can adjust the electronic potential energy distribution between cement particles, reduce the surface activity of cement molecules, and due to its high activity, it can be preferentially adsorbed by the flocculant molecules instead of water reducing agents and slump retainers, effectively improving the plasticizing and dispersing effect of the liquid material, reducing the bleeding and viscosity of the concrete, and improving the workability and work performance of the concrete. The mass ratio of the polyoxyethylene sorbitan monooleate, dodecanol, dodecenyl succinic anhydride, concentrated sulfuric acid, and organic amine is preferably 100:(15-50):(3-30):(1-10):(3-15). Based on 100 parts by weight of polyoxyethylene sorbitan monooleate, the amount of dodecanol is preferably 15-50 parts by weight, such as 15, 20, 25, 30, 35, 40, 45, 50 parts by weight, or any value therebetween; the content of dodecenyl succinic anhydride is preferably 3-30 parts by weight, such as 3, 5, 10, 15, 20, 25, 30 parts by weight, or any value therebetween; the content of concentrated sulfuric acid is preferably 1-10 parts by weight, such as 1, 2, 4, 6, 8, 10 parts by weight, or any value therebetween; and the content of the organic amine is 3-15 parts by weight, such as 3, 5, 8, 10, 12, 15 parts by weight, or any value therebetween. The conditions of the grafting copolymerization reaction are preferably a temperature of 50-90°C, such as 50°C, 55°C, 60°C, 65°C, 70°C, 75°C, 80°C, 85°C, 90°C, or any value therebetween; a pH value of 2-6, such as 2, 3, 4, 5, or 6; and a time of 6-8 h, such as 6 h, 6.5 h, 7 h, 7.5 h, 8 h, or any value therebetween.

[0020] In the present application, the viscosity reducer is preferably an alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative. In a preferred embodiment, the alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative is prepared by polymerization of 1,3-dihydro-1,3-dioxo-5-isobenzofuran carboxylic acid, 2,2-bis(bromomethyl)-1,3-propanediol, dibenzaldimethylhydrazine, 2,4,7,9-tetramethyl-5-decyne-4,7-diol, 2-hydroxyethyl acrylate, ethylene glycol dimethyl ether, propylene glycol n-butyl ether and 18-crown-6 under the action of a catalyst. The polymerization method preferably comprises the following steps: S1: uniformly stirring 2,2-bis(bromomethyl)-1,3-propanediol and dibenzaldimethylhydrazine at a temperature of 25-50°C, adding 1,3-dihydro-1,3-dioxo-5-isobenzofuran carboxylic acid and catalyst I, and then continuing to stir at 30-60°C for 3-4h to obtain a first intermediate product; S2: stirring the first intermediate product, 2,4,7,9-tetramethyl-5-decyne-4,7-diol, 18-crown-6 and catalyst II at a temperature of 40-70°C for 18-24h to obtain a second intermediate product; S3: stirring the second intermediate product, ethylene glycol dimethyl ether, propylene glycol n-butyl ether, 2-hydroxyethyl acrylate and catalyst III at a temperature of 40-90°C for 18-28h, and then cooling to room temperature after the reaction is completed to obtain the viscosity reducer. The viscosity reducer prepared by the above method has both hydrophobic and hydrophilic groups, high dispersibility, and a three-dimensional electrostatic force acting between cement particles, which can introduce a large number of small continuous stable closed beneficial bubbles into the concrete system while ensuring the strength of the concrete. Since water is uniformly distributed on the surface of a large number of bubbles, the amount of free-moving water is reduced, the bleeding and viscosity of the concrete are reduced, and the workability of the concrete is improved. The catalyst I, catalyst II and catalyst III can be the same or different, and are preferably at least one independently selected from concentrated hydrochloric acid, concentrated sulfuric acid and concentrated nitric acid. The amount of catalyst I is preferably 0.1-1.5%, such as 0.1%, 0.3%, 0.5%, 0.8%, 1%, 1.2%, 1.5% or any value therebetween, based on the total mass of 2,2-bis(bromomethyl)-1,3-propanediol, dibenzaldimethylhydrazine and 1,3-dihydro-1,3-dioxo-5-isobenzofuran carboxylic acid. The amount of catalyst II is preferably 0.1-3.0%, such as 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3% or any value therebetween, based on the total mass of 2,4,7,9-tetramethyl-5-decyne-4,7-diol and 18-crown-6. The amount of catalyst III is preferably 0.1-4.0%, such as 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4% or any value therebetween, based on the total mass of ethylene glycol dimethyl ether, propylene glycol n-butyl ether and 2-hydroxyethyl acrylate.1,3-dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid, 2,2-bis(bromomethyl)-1,3-propanediol, diacetone acrylamide, 2,4,7,9-tetramethyl-5-decyne-4,7-diol, 2-hydroxyethyl acrylate, ethylene glycol dimethyl ether, propylene glycol n-butyl ether and 18-crown-6-6. The molar ratio of 1,3-dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid, 2,2-bis(bromomethyl)-1,3-propanediol, diacetone acrylamide, 2,4,7,9-tetramethyl-5-decyne-4,7-diol, 2-hydroxyethyl acrylate, ethylene glycol dimethyl ether, propylene glycol n-butyl ether and 18-crown-6-6 is preferably 1:(1-4):(1-6):(1-4.5):(1-4):(1-3):(1-7):(1-3.5). The amount of 2,2-bis(bromomethyl)-1,3-propanediol is preferably 1-4 mol, such as 1, 1.5, 2, 2.5, 3, 3.5, 4 mol or any value therebetween, based on 1 mol of 1,3-dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid; the amount of diacetone acrylamide is 1-6 mol, such as 1, 2, 3, 4, 5, 6 mol or any value therebetween; the amount of 2,4,7,9-tetramethyl-5-decyne-4,7-diol is 1-4.5 mol, such as 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5 mol or any value therebetween; the amount of 2-hydroxyethyl acrylate is 1-4 mol, such as 1, 2, 3, 4 mol or any value therebetween; the amount of ethylene glycol dimethyl ether is 1-3 mol, such as 1, 1.5, 2, 2.5, 3 mol or any value therebetween; the amount of propylene glycol n-butyl ether is 1-7 mol, such as 1, 2, 3, 4, 5, 6, 7 mol or any value therebetween; and the amount of 18-crown-6-6 is 1-3.5 mol, such as 1, 1.5, 2, 2.5, 3, 3.5 mol or any value therebetween.

[0021] In the present application, the main function of the air entraining agent is to significantly reduce the surface tension and interfacial energy of water, so that a large number of small, ball-like closed bubbles (mostly with a diameter of less than 200 μm) are generated in the mixing process, reducing the frictional resistance between aggregate particles. At the same time, the molecules of the air entraining agent can be oriented and adsorbed on the surface of the bubbles, forming a relatively firm liquid film, so that the bubbles are stable and not easily broken. In the case of reducing the amount of water used, the initial expansion of the self-compacting concrete remains unchanged. In addition, due to the uniform distribution of water on the surface of a large number of bubbles, the amount of free-moving water is reduced, thereby reducing the bleeding of concrete and improving water retention and cohesiveness. The air entraining agent is preferably at least one selected from the group consisting of sodium dodecanol polyoxyethylene ether sulfate, sodium dodecyl sulfonate and triterpene saponin.

[0022] In the present application, the main role of the stabilizer is that the hydroxyl groups and the oxygen atoms on the ether bond of the stabilizer molecule associate with water molecules to form hydrogen bonds, and the mutual diffusion of water molecules and the stabilizer molecular chain enables the water molecules to enter the interior of the stabilizer macromolecular chain and be subjected to a stronger constraint force, so that the free water becomes bound water, thereby improving the water retention of the concrete; on the other hand, the modifier improves the rheological properties of the fresh cement paste, and the porous network structure, the osmotic pressure and the film-forming properties of the stabilizer also hinder the diffusion of water, thereby improving the stability of the concrete to heat, salt and acid and alkali. The stabilizer is selected from at least one of sodium benzoate, xanthan gum, benzyl cyanoethyl cellulose, polyethylene glycol and carboxymethyl hydroxyethyl cellulose.

[0023] In the present application, the main role of the preservative is to inhibit the microbial breeding phenomenon caused by the presence of organic matter in the liquid material during storage, and to prolong the shelf life of the liquid material by coagulating and denaturing the proteins in the microorganisms, thereby interfering with their survival and reproduction. The preservative is preferably calcium benzoate.

[0024] In the present application, the particle size of the glass powder is preferably 180-220 mesh, such as 180 mesh, 185 mesh, 190 mesh, 195 mesh, 200 mesh, 205 mesh, 210 mesh, 215 mesh, 220 mesh or any value therebetween. The particle size of the glass sand is preferably 70-140 mesh, such as 70 mesh, 80 mesh, 90 mesh, 100 mesh, 110 mesh, 120 mesh, 130 mesh, 140 mesh or any value therebetween.

[0025] In the present application, the cement simultaneously contains ordinary Portland cement and sulphoaluminate / aluminate cement. The mass ratio of the ordinary Portland cement to the sulphoaluminate / aluminate cement is preferably 1:(0.125-8), such as 1:0.125, 1:0.2, 1:0.5, 1:1, 1:2, 1:4, 1:6, 1:8 or any value therebetween.

[0026] In the present application, the expanding agent can be at least one of aluminum sulfate, aluminum oxide, potassium aluminum sulfate, etc.

[0027] In the present application, the fumed nanosilica toughened high-strength micro powder is prepared by the following method: halosilane is subjected to a gas phase hydrolysis reaction with hydrogen and oxygen-containing gas at high temperature, the generated fumed silica micro particles are quenched to aggregate into fumed silica large particles, the fumed silica large particles are subjected to a deacidification treatment, and then dried, filtered and ground, and the obtained deacidified fumed silica is mixed with silicon micro powder to obtain the fumed nanosilica toughened high-strength micro powder. The specific reaction process is as follows: SiCl4+2H2+O2→SiO2+4HCl. The conditions of the gas phase hydrolysis reaction include a temperature of 1600℃-2000℃, such as 1600℃, 1700℃, 1800℃, 1900℃, 2000℃ or any value therebetween. The deacidification treatment can be washing with nitrogen-containing air to a pH value of 4-6. The mass ratio of the deacidified fumed silica to the silicon micro powder can be (1-10):(1-10).

[0028] In a preferred embodiment, the modified sulfonated phenolic resin is prepared by the following method: phenol and formaldehyde are subjected to a polycondensation reaction in the presence of an alkali metal hydroxide salt, the obtained polycondensation reaction product and sodium p-aminobenzenesulfonate are dissolved in a bisulfite for a modification reaction, and after the modification reaction is completed, silicon acid is added for a high-temperature reaction, water is supplemented during the high-temperature reaction, and the obtained high-temperature reaction product is the modified sulfonated phenolic resin. The conditions of the polycondensation reaction preferably include a temperature of 50℃-70℃, such as 50℃, 55℃, 60℃, 65℃, 70℃ or any value therebetween; and a time of 20min-60min, such as 20min, 25min, 30min, 35min, 40min, 45min, 50min, 55min, 60min or any value therebetween. The conditions of the modification reaction preferably include a temperature of 80℃-120℃, such as 80℃, 85℃, 90℃, 95℃, 100℃, 105℃, 110℃, 115℃, 120℃ or any value therebetween; and a time of 1h-3h, such as 1h, 1.2h, 1.5h, 1.8h, 2h, 2.2h, 2.5h, 2.8h, 3h or any value therebetween. The conditions of the high-temperature reaction preferably include a temperature of 80℃-120℃, such as 80℃, 85℃, 90℃, 95℃, 100℃, 105℃, 110℃, 115℃, 120℃ or any value therebetween; a time of 2h-5h, such as 2h, 3h, 4h, 5h or any value therebetween; and preferably, water is added every 50min-70min, and the total number of water addition is 2-4 times. The alkali metal hydroxide salt can be potassium hydroxide and / or sodium bisulfite.

[0029] In a preferred embodiment, the viscosity modifier contains 1-10 parts by weight of fused mullite, 5-25 parts by weight of tabular corundum, 10-25 parts by weight of bentonite, 3-10 parts by weight of ceramic micro powder, 10-30 parts by weight of thenardite, 10-50 parts by weight of diatomite, 3-10 parts by weight of meixnerite, 1-15 parts by weight of acacia gum, 1-5 parts by weight of polyvinyl alcohol, 1-8 parts by weight of sodium polyacrylate, 1-10 parts by weight of alginate propylene glycol ester, and 3-20 parts by weight of silica fume. The particle size of the viscosity modifier is preferably 150-250 mesh.

[0030] The preparation method of the self-compacting concrete provided by the application comprises uniformly mixing components of a liquid material to obtain a liquid material; and uniformly mixing components of a dry material to obtain a dry material.

[0031] In addition, the application further provides application of the self-compacting concrete in the field of building.

[0032] The application will be described in detail below through examples.

[0033] In the following examples and comparative examples, the water reducing agent is a short main chain and long side chain poly-carboxylic acid grafting multi-copolymer, which is purchased from Fujian Kezhijie New Material Group Co., Ltd., and the model is Point-MS4404; the slump retaining agent is a long main chain and short side chain poly-carboxylic acid grafting multi-copolymer, which is purchased from Fujian Kezhijie New Material Group Co., Ltd., and the model is Point-TS4404; the sodium dodecanol polyoxyethylene ether sulfate is purchased from Guangzhou Jiali Chemical Co., Ltd., and the model is AEO-9; the polyether modified silicone oil is purchased from Guangdong Nanhui New Material Co., Ltd., and the model is CI-735; the expanding agent is a mixture of multiple expanding sources such as aluminum sulfate, aluminum oxide and potassium aluminum sulfate, which is purchased from Jiangsu Degatao Building Material Co., Ltd., and the model is UEA; the polyethylene glycol is purchased from Guangzhou Zhongye Chemical Co., Ltd., and the model is PEG-600.

[0034] Preparation example 1 of the beautifying agent and a preparation method thereof

[0035] Polyoxyethylene sorbitan monooleate (purchased from Chemical Book, CAS number 9005-65-6), dodecanol, dodecenyl succinic anhydride, concentrated sulfuric acid and triethylamine are put into a reaction kettle according to a mass ratio of 100:30:20:5:8, the pH value is adjusted to 4, the temperature is controlled at 60℃ for 7h of reaction, and after the reaction is completed, the unreacted raw materials are removed by rotary evaporation to obtain a dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafting multi-copolymer.

[0036] Preparation example 2 of the viscosity reducer and a preparation method thereof

[0037] S1: 1500 g of 2,2-bis(bromomethyl)-1,3-propanediol, 800 g of diacetone acrylamide were added into a four-necked flask, the temperature was controlled at 35℃, the material was stirred uniformly, 1200 g of 1,3-dihydro-1,3-dioxo-5-isobenzofuran carboxylic acid was added, 10 mL of concentrated sulfuric acid was added, and the reaction was stirred at 45℃ for 3.5 h to obtain a first intermediate product;

[0038] S2: 860 g of 2,4,7,9-tetramethyl-5-decyne-4,7-diol and 950 g of 18-crown-6 ether-6 and 20 mL of concentrated sulfuric acid were added to the first intermediate product obtained in S1, the temperature was controlled at 50℃, and the reaction was stirred for 20 h to obtain a second intermediate product;

[0039] S3: 1275 g of ethylene glycol dimethyl ether, 1760 g of propylene glycol n-butyl ether and 900 g of 2-hydroxyethyl acrylate and 30 mL of catalyst were added to the second intermediate product obtained in S2, the reaction was stirred at 70℃ for 24 h, and then cooled to room temperature to obtain an alcohol-ester-ether-phosphoric acid-amide multi-component copolymer derivative.

[0040] Preparation example 3 polymer emulsion and preparation method thereof

[0041] 75 g of a composite emulsifier was added to 25 mL of deionized water and stirred to dissolve, then 50 g of a mixed monomer of butyl acrylate, styrene and acrylic acid in a molar ratio of 1:5:5 was added and stirred vigorously for 30 min to prepare a pre-emulsion. Potassium persulfate was dissolved in an appropriate amount of water to prepare an initiator solution with a concentration of 5 wt%. In a 250 mL four-necked flask equipped with a reflux condenser, an electric stirrer, a constant pressure dropping funnel and a thermometer, an appropriate amount of 15 g of sodium bicarbonate, 60 mL of deionized water and 25 g of a composite emulsifier were stirred and dissolved, heated to 60℃, 20 mL of initiator solution was added, and 40 mL of pre-emulsion was added dropwise within 30 min, and the reaction was kept at 75℃ until the liquid turned blue; 2 mol of vinyl triethoxysilane was mixed into 160 mL of pre-emulsion, and 160 mL of pre-emulsion and 30 mL of initiator solution were added dropwise into the flask within 2.5 h, and after the dropwise addition was completed, the reaction was kept for 1.5 h, the temperature was lowered to below 40℃, the pH value was adjusted to 7.5 with ammonia water, and then filtered and stored to obtain a polymer emulsion, i.e. a ternary copolymer emulsion of silicone-styrene-acrylate. The composite emulsifier is a mixture of nonylphenol polyoxyethylene ether and sodium dodecyl sulfate in a mass ratio of 3:1.

[0042] Preparation example 4 modified sulfonated phenolic resin and preparation method thereof

[0043] 1 mol of phenol, 1 mol of formaldehyde and 0.3 mol of potassium hydroxide are reacted at 60±5℃ for 40 min, 20 g of sodium bisulfite is added to the obtained reaction product and stirred to dissolve, after dissolution, 50 g of sodium p-aminobenzenesulfonate is added, then the reaction is warmed to 100℃ and kept at this temperature for 2 h, 50 g of silicic acid is added to the obtained product and the reaction is continued at 100℃ for 6 h, water is added once every 60 min, to obtain a modified sulfonated phenol-formaldehyde resin.

[0044] Viscosity modifier and method for preparing the same

[0045] 5 parts of electrically fused mullite, 10 parts of tabular corundum, 15 parts of bentonite, 8 parts of ceramic micropowder, 15 parts of thenardite, 22 parts of diatomite, 8 parts of magadite, 8 parts of gum arabic, 3 parts of polyvinyl alcohol (number average molecular weight 2000), 6 parts of sodium polyacrylate (number average molecular weight 3000), 8 parts of propylene glycol alginate (purchased from Luliang (Jining) Chemical Technology Co., Ltd., CAS No. 2546-56-2), and 15 parts of silica fume are uniformly mixed and ground to a fineness of 200 μm in particle size D90 to obtain a viscosity modifier.

[0046] Gas-phase nanosilica toughened high-strength micropowder and method for preparing the same

[0047] 100 g of silicon tetrachloride, 25 g of silicon tetrafluoride and 15 g of methyltrichlorosilane are gas-phase hydrolyzed at 1800℃ for 8 h in a mixed gas atmosphere of hydrogen and oxygen at a volume ratio of 3:1 to form gas-phase silica microparticles. The high-temperature gas-phase silica microparticles are reduced to 500℃ at a rate of 10℃ / s to aggregate small particles into large particles, and the product is collected by a cyclone separator. The collected gas-phase silica large particles are sent to a deacidification furnace, washed with nitrogen-containing air until the pH value is 5 to remove residual acidic substances, and then the product is ground to a particle size D90 of 10 μm and mixed with silicon micropowder having a particle size D90 of 10 μm at a mass ratio of 7:3 to obtain gas-phase nanosilica toughened high-strength micropowder.

[0048] Uncovering plate self-compacting concrete and method for preparing the same

[0049] The liquid and dry material parts of the self-compacting concrete for unveiling board are prepared in the following proportions. The liquid material is composed of water reducing agent 180 kg, slump retaining agent 40 kg, citric acid 20 kg, potassium formate 30 kg, sodium dodecyl polyoxyethylene ether sulfate 5 kg, polyether modified silicone oil 2 kg, warm rubber 6 kg, calcium benzoin 10 kg, dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafting multi-copolymer 30 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 30 kg, silicone-styrene-acrylate ternary copolymer emulsion 20 kg, and water 627 kg. The dry material is composed of ordinary Portland cement 250 kg, aluminate cement 150 kg, gypsum 50 kg, glass powder of 180-220 mesh 50 kg, expanding agent 50 kg, 200 mesh fumed nano-silica toughening high-strength micro powder 100 kg, modified sulfonated phenolic aldehyde resin 50 kg, glass sand of 70-140 mesh 650 kg, 5-16 mm crushed stone 850 kg, and viscosity modifier 30 kg.

[0050] Example 2 self-compacting concrete for unveiling board and method for preparing the same

[0051] The liquid and dry material parts of the self-compacting concrete for unveiling board are prepared in the following proportions. The liquid material is composed of water reducing agent 180 kg, slump retaining agent 40 kg, citric acid 20 kg, potassium formate 30 kg, sodium dodecyl polyoxyethylene ether sulfate 5 kg, polyether modified silicone oil 2 kg, warm rubber 6 kg, calcium benzoin 10 kg, dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafting multi-copolymer 30 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 30 kg, silicone-styrene-acrylate ternary copolymer emulsion 20 kg, and water 627 kg. The dry material is composed of ordinary Portland cement 250 kg, aluminate cement 150 kg, gypsum 50 kg, glass powder of 180-220 mesh 50 kg, expanding agent 50 kg, 200 mesh fumed nano-silica toughening high-strength micro powder 100 kg, modified sulfonated phenolic aldehyde resin 50 kg, glass sand of 70-140 mesh 650 kg, 5-16 mm crushed stone 850 kg, and viscosity modifier 30 kg.

[0052] Example 3 self-compacting concrete for unveiling board and method for preparing the same

[0053] The liquid and dry material parts of the self-compacting concrete for unveiling the plate are prepared in the following proportions. The liquid material is composed of water reducing agent 170 kg, slump retaining agent 60 kg, sodium hexametaphosphate 30 kg, sodium fluoride 20 kg, sodium dodecyl sulfonate 2 kg, triterpene saponin 3 kg, polyether modified silicone oil 2 kg, sodium benzoate 8 kg, calcium benzoin acid 10 kg, dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafting multi-copolymer 25 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 30 kg, silicone-styrene-acrylate ternary copolymer emulsion 25 kg, and water 615 kg. The dry material is composed of ordinary Portland cement 290 kg, aluminate cement 110 kg, gypsum 60 kg, glass powder of 180-220 mesh 90 kg, expanding agent 25 kg, 200 mesh fumed nano-silica toughening high-strength micro powder 80 kg, modified sulfonated phenolic resin 40 kg, glass sand of 70-140 mesh 640 kg, and broken stone of 5-16 mm 855 kg, and viscosity modifier 40 kg.

[0054] Example 4 self-compacting concrete for unveiling the plate and a method for preparing the same

[0055] The liquid and dry material parts of the self-compacting concrete for unveiling the plate are prepared in the following proportions. The liquid material is composed of water reducing agent 170 kg, slump retaining agent 60 kg, sodium hexametaphosphate 30 kg, sodium fluoride 20 kg, sodium dodecyl sulfonate 2 kg, triterpene saponin 3 kg, polyether modified silicone oil 2 kg, sodium benzoate 8 kg, calcium benzoin acid 10 kg, dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafting multi-copolymer 25 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 30 kg, silicone-styrene-acrylate ternary copolymer emulsion 25 kg, and water 615 kg. The dry material is composed of ordinary Portland cement 290 kg, aluminate cement 110 kg, gypsum 60 kg, glass powder of 180-220 mesh 90 kg, expanding agent 25 kg, 200 mesh fumed nano-silica toughening high-strength micro powder 80 kg, modified sulfonated phenolic resin 40 kg, glass sand of 70-140 mesh 640 kg, and broken stone of 5-16 mm 855 kg, and viscosity modifier 40 kg.

[0056] Example 5 self-compacting concrete for unveiling the plate and a method for preparing the same

[0057] The liquid and dry material parts of the self-compacting concrete for revealing plate are prepared in the following proportions. The liquid material is composed of water reducing agent 170 kg, slump retaining agent 80 kg, citric acid 15 kg, sodium gluconate 20 kg, calcium nitrate 15 kg, triterpenoid saponin 7 kg, polyether modified silicone oil 2 kg, carboxymethyl hydroxyethyl cellulose 5 kg, calcium benzoin 10 kg, dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafted multi-copolymer 30 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 40 kg, silicone-styrene-acrylate ternary copolymer emulsion 30 kg, and water 576 kg. The dry material is composed of ordinary Portland cement 320 kg, sulphoaluminate cement 80 kg, gypsum 70 kg, 180-220 mesh glass powder 110 kg, expanding agent 30 kg, 200 mesh fumed nanometer silica toughening high-strength micro powder 80 kg, modified sulfonated phenolic aldehyde resin 30 kg, 70-140 mesh glass sand 630 kg, 5-16 mm crushed stone 845 kg, and viscosity modifier 35 kg.

[0058] Example 6 self-compacting concrete for revealing plate and method for preparing the same

[0059] The liquid and dry material parts of the self-compacting concrete for revealing plate are prepared in the following proportions. The liquid material is composed of water reducing agent 170 kg, slump retaining agent 90 kg, sodium hexametaphosphate 25 kg, sodium gluconate 20 kg, potassium formate 10 kg, triterpenoid saponin 6 kg, polyether modified silicone oil 1 kg, warm rubber 6 kg, calcium benzoin 10 kg, dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafted multi-copolymer 40 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 30 kg, silicone-styrene-acrylate ternary copolymer emulsion 20 kg, and water 572 kg. The dry material is composed of ordinary Portland cement 330 kg, sulphoaluminate cement 50 kg, gypsum 80 kg, 180-220 mesh glass powder 125 kg, expanding agent 30 kg, 200 mesh fumed nanometer silica toughening high-strength micro powder 70 kg, modified sulfonated phenolic aldehyde resin 30 kg, 70-140 mesh glass sand 630 kg, 5-16 mm crushed stone 850 kg, and viscosity modifier 35 kg.

[0060] Comparative Example 1 (super lower limit of beautifying agent)

[0061] The liquid and dry material are prepared according to the method of Example 4, except that the amount of dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafted multi-copolymer is adjusted to 5 kg and the amount of water is adjusted to 634 kg, i.e. a super lower limit, and the rest of the conditions are the same as in Example 4, and the specific process is as follows:

[0062] The liquid and dry material parts of the self-compacting concrete for uncovering plate are prepared in the following proportions. The liquid material is composed of water reducing agent 170 kg, slump retaining agent 70 kg, malt dextrin 10 kg, sodium gluconate 20 kg, triisopropanolamine 20 kg, sodium lauryl polyoxyethylene ether sulfate 6 kg, polyether modified silicone oil 2 kg, polyethylene glycol 8 kg, calcium benzoin 10 kg, lauryl polyoxyethylene sorbitan monooleate dodecenyl succinic anhydride grafting multi-copolymer 5 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 25 kg, organic silicon-styrene-acrylate ternary copolymer emulsion 20 kg, and water 509 kg. The dry material is composed of ordinary Portland cement 305 kg, sulphoaluminate cement 95 kg, gypsum 65 kg, glass powder of 180-220 mesh 100 kg, expanding agent 35 kg, 200 mesh fumed nano-silica toughening high-strength micro powder 100 kg, modified sulfonated phenolic aldehyde resin 35 kg, glass sand of 70-140 mesh 630 kg, 5-16 mm of broken stone 830 kg, and viscosity modifier 35 kg.

[0063] Comparative Example 2 (super upper limit of beautifying agent)

[0064] The liquid and dry material are prepared according to the method of Example 4, except that the amount of lauryl polyoxyethylene sorbitan monooleate dodecenyl succinic anhydride grafting multi-copolymer is adjusted to 130 kg and the amount of water is adjusted to 509 kg, i.e. super lower limit, and the rest of the conditions are the same as in Example 4, and the specific process is as follows:

[0065] The liquid and dry material parts of the self-compacting concrete for uncovering plate are prepared in the following proportions. The liquid material is composed of water reducing agent 170 kg, slump retaining agent 70 kg, malt dextrin 10 kg, sodium gluconate 20 kg, triisopropanolamine 20 kg, sodium lauryl polyoxyethylene ether sulfate 6 kg, polyether modified silicone oil 2 kg, polyethylene glycol 8 kg, calcium benzoin 10 kg, lauryl polyoxyethylene sorbitan monooleate dodecenyl succinic anhydride grafting multi-copolymer 130 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 25 kg, organic silicon-styrene-acrylate ternary copolymer emulsion 20 kg, and water 509 kg. The dry material is composed of ordinary Portland cement 305 kg, sulphoaluminate cement 95 kg, gypsum 65 kg, glass powder of 180-220 mesh 100 kg, expanding agent 35 kg, 200 mesh fumed nano-silica toughening high-strength micro powder 100 kg, modified sulfonated phenolic aldehyde resin 35 kg, glass sand of 70-140 mesh 630 kg, 5-16 mm of broken stone 830 kg, and viscosity modifier 35 kg.

[0066] Comparative Example 3 (super lower limit of viscosity reducing agent)

[0067] The liquid material and dry material were prepared according to the method of Example 4, except that the amount of alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative was adjusted to 5 kg and the amount of water was adjusted to 629 kg, i.e., the lower limit was exceeded, and the other conditions were the same as in Example 4, and the specific process was as follows:

[0068] The liquid material and dry material of the plate-releasing self-compacting concrete were prepared in the following proportions. The liquid material was composed of water reducing agent 170 kg, slump retaining agent 70 kg, malt dextrin 10 kg, sodium gluconate 20 kg, triisopropanolamine 20 kg, sodium dodecanol polyoxyethylene ether sulfate 6 kg, polyether modified silicone oil 2 kg, polyethylene glycol 8 kg, calcium benzoate 10 kg, dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafted multi-copolymer 30 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 5 kg, organic silicon-styrene-acrylate terpolymer emulsion 20 kg, and water 629 kg. The dry material was composed of ordinary Portland cement 305 kg, sulphoaluminate cement 95 kg, gypsum 65 kg, glass powder of 180-220 mesh 100 kg, expanding agent 35 kg, 200 mesh fumed nano-silica toughening high-strength micro powder 100 kg, modified sulfonated phenolic resin 35 kg, glass sand of 70-140 mesh 630 kg, crushed stone of 5-16 mm 830 kg, and viscosity modifier 35 kg.

[0069] Comparative Example 4 (excessive upper limit of viscosity reducer)

[0070] The liquid material and dry material were prepared according to the method of Example 4, except that the amount of alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative was adjusted to 5 kg and the amount of water was adjusted to 629 kg, i.e., the lower limit was exceeded, and the other conditions were the same as in Example 4, and the specific process was as follows:

[0071] The liquid and dry material parts of the self-compacting concrete for uncovering plate are prepared in the following proportions. The liquid material is composed of water reducing agent 170 kg, slump retaining agent 70 kg, malt dextrin 10 kg, sodium gluconate 20 kg, triisopropanolamine 20 kg, sodium dodecanol polyoxyethylene ether sulfate 6 kg, polyether modified silicone oil 2 kg, polyethylene glycol 8 kg, calcium benzoin 10 kg, dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafting multi-copolymer 30 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 125 kg, organic silicon-styrene-acrylate ternary copolymer emulsion 20 kg, and water 509 kg. The dry material is composed of ordinary Portland cement 305 kg, sulphoaluminate cement 95 kg, gypsum 65 kg, glass powder of 180-220 mesh 100 kg, expanding agent 35 kg, 200 mesh fumed nano-silica toughening high-strength micro powder 100 kg, modified sulfonated phenolic aldehyde resin 35 kg, glass sand of 70-140 mesh 630 kg, 5-16 mm of broken stone 830 kg, and viscosity modifier 35 kg.

[0072] Comparative Example 5 (glass powder over lower limit)

[0073] The liquid and dry material are prepared according to the method of Example 4, except that the amount of glass powder is adjusted to 5 kg, i.e. over the lower limit, and the other conditions are the same as in Example 4, and the specific process is as follows:

[0074] The liquid and dry material parts of the self-compacting concrete for uncovering plate are prepared in the following proportions. The liquid material is composed of water reducing agent 170 kg, slump retaining agent 70 kg, malt dextrin 10 kg, sodium gluconate 20 kg, triisopropanolamine 20 kg, sodium dodecanol polyoxyethylene ether sulfate 6 kg, polyether modified silicone oil 2 kg, polyethylene glycol 8 kg, calcium benzoin 10 kg, dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafting multi-copolymer 30 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 25 kg, organic silicon-styrene-acrylate ternary copolymer emulsion 20 kg, and water 609 kg. The dry material is composed of ordinary Portland cement 305 kg, sulphoaluminate cement 95 kg, gypsum 65 kg, glass powder of 180-220 mesh 5 kg, expanding agent 35 kg, 200 mesh fumed nano-silica toughening high-strength micro powder 100 kg, modified sulfonated phenolic aldehyde resin 35 kg, glass sand of 70-140 mesh 630 kg, 5-16 mm of broken stone 830 kg, and viscosity modifier 35 kg.

[0075] Comparative Example 6 (glass powder over upper limit)

[0076] The liquid and dry material are prepared according to the method of Example 4, except that the amount of glass powder is adjusted to 170 kg, i.e. over the upper limit, and the other conditions are the same as in Example 4, and the specific process is as follows:

[0077] The liquid and dry components of the self-compacting concrete are prepared according to the following proportions. The liquid component consists of 170 kg of water-reducing agent, 70 kg of slump retainer, 10 kg of maltodextrin, 20 kg of sodium gluconate, 20 kg of triisopropanolamine, 6 kg of sodium dodecyl alcohol polyoxyethylene ether sulfate, 2 kg of polyether-modified silicone oil, 8 kg of polyethylene glycol, 10 kg of calcium benzoate, 30 kg of dodecyl alcohol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafted multi-component copolymer, 25 kg of alcohol-ester-ether-phosphate-amide multi-component copolymer derivative, 20 kg of organosilicon-styrene-acrylate terpolymer emulsion, and 609 kg of water. The dry material consists of 305 kg of ordinary silicate cement, 95 kg of sulfoaluminate cement, 65 kg of gypsum, 170 kg of 180-220 mesh glass powder, 35 kg of expansion agent, 100 kg of 200 mesh fumed nano silica toughened high-strength micro powder, 35 kg of modified sulfonated phenolic resin, 630 kg of 70-140 mesh glass sand, 830 kg of 5-16 mm crushed stone, and 35 kg of viscosity modifier.

[0078] Comparative Example 7 (glass sand exceeding the lower limit)

[0079] The liquid and dry materials were prepared according to the method in Example 4, except that the amount of glass sand was adjusted to 480 kg, i.e., below the lower limit. The other conditions were the same as in Example 4. The specific process is as follows:

[0080] The liquid and dry components of the self-compacting concrete are prepared according to the following proportions. The liquid component consists of 170 kg of water-reducing agent, 70 kg of slump retainer, 10 kg of maltodextrin, 20 kg of sodium gluconate, 20 kg of triisopropanolamine, 6 kg of sodium dodecyl alcohol polyoxyethylene ether sulfate, 2 kg of polyether-modified silicone oil, 8 kg of polyethylene glycol, 10 kg of calcium benzoate, 30 kg of dodecyl alcohol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafted multi-component copolymer, 25 kg of alcohol-ester-ether-phosphate-amide multi-component copolymer derivative, 20 kg of organosilicon-styrene-acrylate terpolymer emulsion, and 609 kg of water. The dry material consists of 305 kg of ordinary silicate cement, 95 kg of sulfoaluminate cement, 65 kg of gypsum, 100 kg of 180-220 mesh glass powder, 35 kg of expansion agent, 100 kg of 200 mesh fumed nano silica toughened high-strength micro powder, 35 kg of modified sulfonated phenolic resin, 480 kg of 70-140 mesh glass sand, 830 kg of 5-16 mm crushed stone, and 35 kg of viscosity modifier.

[0081] Comparative Example 8 (glass sand exceeding the upper limit)

[0082] The liquid and dry materials were prepared according to the method in Example 4, except that the amount of glass sand was adjusted to 830 kg, i.e., below the lower limit. The other conditions were the same as in Example 4. The specific process is as follows:

[0083] The liquid and dry material parts of the self-compacting concrete for uncovering plate are prepared in the following proportions. The liquid material is composed of water reducing agent 170 kg, slump retaining agent 70 kg, malt dextrin 10 kg, sodium gluconate 20 kg, triisopropanolamine 20 kg, sodium dodecanol polyoxyethylene ether sulfate 6 kg, polyether modified silicone oil 2 kg, polyethylene glycol 8 kg, calcium benzoin 10 kg, dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafting multi-copolymer 30 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 25 kg, silicone-styrene-acrylate ternary copolymer emulsion 20 kg, and water 609 kg. The dry material is composed of ordinary Portland cement 305 kg, sulphoaluminate cement 95 kg, gypsum 65 kg, glass powder of 180-220 mesh 100 kg, expanding agent 35 kg, 200 mesh fumed nano-silica toughening high-strength micro powder 100 kg, modified sulfonated phenolic aldehyde resin 35 kg, glass sand of 70-140 mesh 830 kg, and broken stone of 5-16 mm 830 kg, and viscosity modifier 35 kg.

[0084] Comparative Example 9 (fumed nano-silica micro powder over lower limit)

[0085] The liquid and dry material are prepared according to the method of Example 4, except that the amount of fumed nano-silica toughening high-strength micro powder is adjusted to 30 kg, i.e., over the lower limit, and the rest of the conditions are the same as in Example 4, and the specific process is as follows:

[0086] The liquid and dry material parts of the self-compacting concrete for uncovering plate are prepared in the following proportions. The liquid material is composed of water reducing agent 170 kg, slump retaining agent 70 kg, malt dextrin 10 kg, sodium gluconate 20 kg, triisopropanolamine 20 kg, sodium dodecanol polyoxyethylene ether sulfate 6 kg, polyether modified silicone oil 2 kg, polyethylene glycol 8 kg, calcium benzoin 10 kg, dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafting multi-copolymer 30 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 25 kg, silicone-styrene-acrylate ternary copolymer emulsion 20 kg, and water 609 kg. The dry material is composed of ordinary Portland cement 305 kg, sulphoaluminate cement 95 kg, gypsum 65 kg, glass powder of 180-220 mesh 100 kg, expanding agent 35 kg, 200 mesh fumed nano-silica toughening high-strength micro powder 30 kg, modified sulfonated phenolic aldehyde resin 35 kg, glass sand of 70-140 mesh 630 kg, and broken stone of 5-16 mm 830 kg, and viscosity modifier 35 kg.

[0087] Comparative Example 10 (fumed nano-silica micro powder over upper limit)

[0088] The liquid material and dry material were prepared according to the method of Example 4, except that the amount of fumed nano-silica toughened high-strength micro powder was adjusted to 210 kg, i.e., an upper limit, and the rest of the conditions were the same as in Example 4, and the specific process was as follows:

[0089] The liquid material and dry material of the plate-releasing self-compacting concrete were prepared in the following proportions. The liquid material was composed of water reducing agent 170 kg, slump retaining agent 70 kg, malt dextrin 10 kg, sodium gluconate 20 kg, triisopropanolamine 20 kg, sodium dodecanol polyoxyethylene ether sulfate 6 kg, polyether modified silicone oil 2 kg, polyethylene glycol 8 kg, calcium benzoin 10 kg, dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafting multi-copolymer 30 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 25 kg, silicone-styrene-acrylate ternary copolymer emulsion 20 kg, and water 609 kg. The dry material was composed of ordinary Portland cement 305 kg, sulphoaluminate cement 95 kg, gypsum 65 kg, glass powder of 180-220 mesh 100 kg, expanding agent 35 kg, fumed nano-silica toughened high-strength micro powder of 200 mesh 210 kg, modified sulfonated phenolic resin 35 kg, glass sand of 70-140 mesh 630 kg, and crushed stone of 5-16 mm 830 kg, and viscosity modifier 35 kg.

[0090] Comparative Example 11 (phenolic resin upper limit)

[0091] The liquid material and dry material were prepared according to the method of Example 4, except that the amount of fumed nano-silica toughened high-strength micro powder was adjusted to 210 kg, i.e., an upper limit, and the rest of the conditions were the same as in Example 4, and the specific process was as follows:

[0092] The liquid material and dry material of the plate-releasing self-compacting concrete were prepared in the following proportions. The liquid material was composed of water reducing agent 170 kg, slump retaining agent 70 kg, malt dextrin 10 kg, sodium gluconate 20 kg, triisopropanolamine 20 kg, sodium dodecanol polyoxyethylene ether sulfate 6 kg, polyether modified silicone oil 2 kg, polyethylene glycol 8 kg, calcium benzoin 10 kg, dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafting multi-copolymer 30 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 25 kg, silicone-styrene-acrylate ternary copolymer emulsion 20 kg, and water 609 kg. The dry material was composed of ordinary Portland cement 305 kg, sulphoaluminate cement 95 kg, gypsum 65 kg, glass powder of 180-220 mesh 100 kg, expanding agent 35 kg, fumed nano-silica toughened high-strength micro powder of 200 mesh 210 kg, modified sulfonated phenolic resin 35 kg, glass sand of 70-140 mesh 630 kg, and crushed stone of 5-16 mm 830 kg, and viscosity modifier 35 kg.

[0093] Comparative Example 12 (phenolic resin over upper limit)

[0094] The liquid and dry materials were prepared according to the method of Example 4, except that the amount of liquid modified sulfonated phenolic resin was adjusted to 85 kg, i.e., over the lower limit, during the preparation of the dry material, and the other conditions were the same as in Example 4. The specific process is as follows:

[0095] The liquid and dry material parts of the plate-releasing self-compacting concrete were prepared in the following proportions. The liquid material was composed of water reducing agent 170 kg, slump retaining agent 70 kg, malt dextrin 10 kg, sodium gluconate 20 kg, triisopropanolamine 20 kg, sodium dodecanol polyoxyethylene ether sulfate 6 kg, polyether modified silicone oil 2 kg, polyethylene glycol 8 kg, calcium benzoate 10 kg, dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafted multi-copolymer 30 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 25 kg, silicone-styrene-acrylate ternary copolymer emulsion 20 kg, and water 609 kg. The dry material was composed of ordinary Portland cement 305 kg, sulphoaluminate cement 95 kg, gypsum 65 kg, glass powder of 180-220 mesh 100 kg, expanding agent 35 kg, 200 mesh fumed nano-silica toughening high-strength micro powder 100 kg, modified sulfonated phenolic resin 85 kg, glass sand of 70-140 mesh 630 kg, crushed stone of 5-16 mm 830 kg, and viscosity modifier 35 kg.

[0096] Comparative Example 13 (viscosity modifier over lower limit)

[0097] The liquid and dry materials were prepared according to the method of Example 4, except that the amount of viscosity modifier was adjusted to 5 kg, i.e., over the lower limit, during the preparation of the dry material, and the other conditions were the same as in Example 4. The specific process is as follows:

[0098] The liquid and dry parts of the self-compacting concrete for uncovering plate are prepared in the following proportions. The liquid part is composed of water reducing agent 170 kg, slump retaining agent 70 kg, malt dextrin 10 kg, sodium gluconate 20 kg, triisopropanolamine 20 kg, sodium dodecanol polyoxyethylene ether sulfate 6 kg, polyether modified silicone oil 2 kg, polyethylene glycol 8 kg, calcium benzoin 10 kg, dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafting multi-copolymer 30 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 25 kg, organic silicon-styrene-acrylate ternary copolymer emulsion 20 kg, and water 609 kg. The dry part is composed of ordinary Portland cement 305 kg, sulphoaluminate cement 95 kg, gypsum 65 kg, glass powder of 180-220 mesh 100 kg, expanding agent 35 kg, 200 mesh fumed nano-silica toughening high-strength micro powder 100 kg, modified sulfonated phenolic aldehyde resin 35 kg, glass sand of 70-140 mesh 630 kg, 5-16 mm crushed stone 830 kg, and viscosity modifier 5 kg.

[0099] Comparative Example 14 (viscosity modifier over upper limit)

[0100] The liquid and dry parts are prepared according to the method of Example 4, except that the amount of viscosity modifier is adjusted to 105 kg during the preparation of the dry part, i.e., over the lower limit, and the other conditions are the same as in Example 4. The specific process is as follows:

[0101] The liquid and dry parts of the self-compacting concrete for uncovering plate are prepared in the following proportions. The liquid part is composed of water reducing agent 170 kg, slump retaining agent 70 kg, malt dextrin 10 kg, sodium gluconate 20 kg, triisopropanolamine 20 kg, sodium dodecanol polyoxyethylene ether sulfate 6 kg, polyether modified silicone oil 2 kg, polyethylene glycol 8 kg, calcium benzoin 10 kg, dodecanol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafting multi-copolymer 30 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 25 kg, organic silicon-styrene-acrylate ternary copolymer emulsion 20 kg, and water 609 kg. The dry part is composed of ordinary Portland cement 305 kg, sulphoaluminate cement 95 kg, gypsum 65 kg, glass powder of 180-220 mesh 100 kg, expanding agent 35 kg, 200 mesh fumed nano-silica toughening high-strength micro powder 100 kg, modified sulfonated phenolic aldehyde resin 35 kg, glass sand of 70-140 mesh 630 kg, 5-16 mm crushed stone 830 kg, and viscosity modifier 105 kg.

[0102] Comparative Example 15 (emulsion over lower limit)

[0103] The liquid material and dry material were prepared according to the method of Example 4, except that in the preparation of the liquid material, the amount of polymer emulsion was adjusted to 5 kg and the amount of water was adjusted to 624 kg, i.e., super lower limit, and the rest of the conditions were the same as in Example 4, and the specific process was as follows:

[0104] The liquid material and dry material parts of the plate-releasing self-compacting concrete were prepared in the following proportions. The liquid material was composed of water reducing agent 170 kg, slump retaining agent 70 kg, malt dextrin 10 kg, sodium gluconate 20 kg, triisopropanolamine 20 kg, sodium lauryl polyoxyethylene ether sulfate 6 kg, polyether modified silicone oil 2 kg, polyethylene glycol 8 kg, calcium benzoin 10 kg, lauryl-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafting multi-copolymer 30 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 25 kg, silicone-styrene-acrylate ternary copolymer emulsion 5 kg, and water 624 kg. The dry material was composed of ordinary Portland cement 305 kg, sulphoaluminate cement 95 kg, gypsum 65 kg, glass powder of 180-220 mesh 100 kg, expanding agent 35 kg, 200 mesh fumed nano-silica toughening high-strength micro powder 100 kg, modified sulfonated phenolic aldehyde resin 35 kg, glass sand of 70-140 mesh 630 kg, broken stone of 5-16 mm 830 kg, and viscosity modifier 35 kg.

[0105] Comparative Example 16 (emulsion super upper limit)

[0106] The liquid material and dry material were prepared according to the method of Example 4, except that in the preparation of the liquid material, the amount of polymer emulsion was adjusted to 5 kg and the amount of water was adjusted to 624 kg, i.e., super lower limit, and the rest of the conditions were the same as in Example 4, and the specific process was as follows:

[0107] The liquid material and dry material parts of the plate-releasing self-compacting concrete were prepared in the following proportions. The liquid material was composed of water reducing agent 170 kg, slump retaining agent 70 kg, malt dextrin 10 kg, sodium gluconate 20 kg, triisopropanolamine 20 kg, sodium lauryl polyoxyethylene ether sulfate 6 kg, polyether modified silicone oil 2 kg, polyethylene glycol 8 kg, calcium benzoin 10 kg, lauryl-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafting multi-copolymer 30 kg, alcohol-ester-ether-phosphoric acid-amide multi-copolymer derivative 25 kg, silicone-styrene-acrylate ternary copolymer emulsion 5 kg, and water 624 kg. The dry material was composed of ordinary Portland cement 305 kg, sulphoaluminate cement 95 kg, gypsum 65 kg, glass powder of 180-220 mesh 100 kg, expanding agent 35 kg, 200 mesh fumed nano-silica toughening high-strength micro powder 100 kg, modified sulfonated phenolic aldehyde resin 35 kg, glass sand of 70-140 mesh 630 kg, broken stone of 5-16 mm 830 kg, and viscosity modifier 35 kg.

[0108] Comparative Example 17 (without setting regulator)

[0109] The self-compacting concrete was prepared according to the method of Example 1, except that the setting regulator was replaced by the same weight portion of defoaming agent, and the remaining conditions were the same as those of Example 1, to obtain the liquid material and dry material of the self-compacting concrete.

[0110] Comparative Example 18 (without defoaming agent)

[0111] The self-compacting concrete was prepared according to the method of Example 1, except that the defoaming agent was replaced by the same weight portion of setting regulator, and the remaining conditions were the same as those of Example 1, to obtain the liquid material and dry material of the self-compacting concrete.

[0112] Comparative Example 19 (without polymer emulsion)

[0113] The self-compacting concrete was prepared according to the method of Example 1, except that the polymer emulsion was replaced by the same weight portion of setting regulator, and the remaining conditions were the same as those of Example 1, to obtain the liquid material and dry material of the self-compacting concrete.

[0114] Test Example

[0115] 15 kg of liquid material and 2400 kg of dry material and 225 kg of water were mixed and stirred uniformly at 30°C, and then molded and maintained according to the age, to obtain a C40 self-compacting concrete product, and the performance of the product was tested, and the results are shown in Table 1.

[0116]

[0117]

[0118] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and those of ordinary skill in the art can make changes, modifications, replacements and variations to the above-described embodiments without departing from the principles and spirit of the present application within the scope of the present application.

Claims

1. A self-compacting concrete with a slab-removing design, characterized in that, The self-compacting concrete comprises a liquid component and a dry component. The liquid component contains 170-180 parts by weight of a water-reducing agent, 40-90 parts by weight of a slump retainer, 40-60 parts by weight of a setting regulator, 0.1-2 parts by weight of a defoamer, 10-30 parts by weight of a polymer emulsion, 10-40 parts by weight of a beautifying agent, 20-40 parts by weight of a viscosity reducer, and 500-650 parts by weight of water, as well as optional 0-10 parts by weight of an air-entraining agent, 0-10 parts by weight of a stabilizer, and 0-10 parts by weight of a corrosion inhibitor. The setting regulator is selected from at least one of calcium nitrate, triisopropanolamine, sodium fluoride, potassium fluoride, sodium formate, potassium formate, citric acid, sodium hexametaphosphate, potassium hexametaphosphate, sodium gluconate, potassium gluconate, and maltodextrin. The defoamer is... The polyether-modified silicone oil, wherein the polymer emulsion is an organosilicon-modified styrene and acrylate copolymer emulsion; the dry material contains 50-130 parts by weight of glass powder, 600-700 parts by weight of glass sand, 350-400 parts by weight of cement, 800-900 parts by weight of crushed stone, 50-80 parts by weight of gypsum, 30-50 parts by weight of expanding agent, 70-100 parts by weight of fumed silica toughened high-strength micro powder, 30-50 parts by weight of modified sulfonated phenolic resin and 30-40 parts by weight of viscosity modifier; the mass ratio of the liquid material to the dry material is (0.3-3):(100-500); the beautifying agent is a dodecyl alcohol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafted multi-component copolymer.

2. The self-compacting concrete with slab removal as described in claim 1, characterized in that, The self-compacting concrete of the slab also contains added water, and the mass ratio of the dry material to the added water is (100~500):(10~20).

3. The self-compacting concrete with slab removal as described in claim 1, characterized in that, The water-reducing agent is a short-chain, long-side-chain polycarboxylic acid grafted multi-component copolymer; the slump-retaining agent is a long-chain, short-side-chain polycarboxylic acid grafted multi-component copolymer.

4. The self-compacting concrete with slab removal as described in claim 1, characterized in that, The organosilicon-modified styrene and acrylate copolymer emulsion is a ternary copolymer emulsion of organosilicon-styrene-acrylate.

5. The self-compacting concrete with slab removal according to claim 4, characterized in that, The ternary copolymer emulsion of organosilicon-styrene-acrylate is prepared by emulsion polymerization of unsaturated organosilicon monomers, styrene monomers and acrylic / ester monomers.

6. The self-compacting concrete with slab removal according to claim 5, characterized in that, The emulsion polymerization reaction involves dissolving composite emulsifier I, acrylic / ester monomers, and styrene monomers in water to obtain a pre-emulsion; dissolving an initiator in water to obtain an initiator solution; dissolving bicarbonate and composite emulsifier II in water and heating to 50°C~70°C, adding a portion of the pre-emulsion and a portion of the initiator solution, and then heating to 75°C~80°C and maintaining the temperature until the liquid turns blue; dissolving unsaturated organosilicon monomers in the remaining pre-emulsion, adding the remaining initiator solution dropwise, maintaining the temperature after the addition is complete, cooling to below 40°C after the reaction is complete, adjusting the pH to 7~8, and filtering to obtain a ternary copolymer emulsion of organosilicon-styrene-acrylate.

7. The self-compacting concrete with slab removal as described in claim 1, characterized in that, The beautifying agent is prepared by the following method: polyoxyethylene sorbitan monooleate, dodecyl alcohol, and dodecenyl succinic anhydride are subjected to a graft copolymerization reaction under the action of concentrated sulfuric acid and organic amine to obtain a dodecyl alcohol-polyoxyethylene sorbitan monooleate-dodecenyl succinic anhydride grafted multi-component copolymer.

8. The self-compacting concrete with slab removal according to claim 7, characterized in that, The mass ratio of the polyoxyethylene sorbitan monooleate, dodecanol, dodecenyl succinic anhydride, concentrated sulfuric acid and organic amine is 100:(15~50):(3~30):(1~10):(3~15).

9. The self-compacting concrete with slab removal according to claim 7, characterized in that, The graft copolymerization reaction conditions include a temperature of 50℃~90℃, a pH value of 2~6, and a time of 6h~8h.

10. The self-compacting concrete with slab removal according to claim 1, characterized in that, The viscosity reducer is an alcohol-ester-ether-phosphate-amide multi-component copolymer derivative.

11. The self-compacting concrete with slab removal according to claim 10, characterized in that, The alcohol-ester-ether-phosphate-amide multi-component copolymer derivative is prepared by polymerization of 1,3-dihydro-1,3-dioxo-5-isobenzofuran carboxylic acid, 2,2-bis(bromomethyl)-1,3-propanediol, diacetone acrylamide, 2,4,7,9-tetramethyl-5-decyn-4,7-diol, 2-hydroxyethyl acrylate, ethylene glycol dimethyl ether, propylene glycol n-butyl ether, and 18-crown ether-6 in the presence of a catalyst.

12. The self-compacting concrete with slab removal according to claim 11, characterized in that, The polymerization reaction includes the following steps: S1: 2,2-bis(bromomethyl)-1,3-propanediol and diacetone acrylamide were stirred evenly at 25℃~50℃, 1,3-dihydro-1,3-dioxo-5-isobenzofuran carboxylic acid and catalyst I were added, and the reaction was continued at 30℃~60℃ for 3h~4h to obtain the first intermediate product. S2: The first intermediate, 2,4,7,9-tetramethyl-5-decyn-4,7-diol, 18-crown ether-6, and catalyst II are stirred at 40℃~70℃ for 18h~24h to obtain the second intermediate. S3: The second intermediate product, ethylene glycol dimethyl ether, propylene glycol n-butyl ether, 2-hydroxyethyl acrylate and catalyst III are stirred and reacted at a temperature of 40℃~90℃ for 18h~28h. After the reaction is completed, the mixture is cooled to room temperature to obtain the viscosity reducer.

13. The self-compacting concrete with slab removal as described in claim 1, characterized in that, The air-entraining agent is selected from at least one of sodium dodecyl polyoxyethylene ether sulfate, sodium dodecyl sulfonate, and triterpenoid saponins; the stabilizer is selected from at least one of sodium benzoate, styrax, benzyl cyanoethyl cellulose, polyethylene glycol, and carboxymethyl hydroxyethyl cellulose; and the preservative is calcium benzoate.

14. The self-compacting concrete with slab removal according to claim 1, characterized in that, The glass powder has a particle size of 180 mesh to 220 mesh, and the glass sand has a particle size of 70 mesh to 140 mesh.

15. The self-compacting concrete with slab removal according to claim 1, characterized in that, The cement contains both ordinary silicate cement and sulfoaluminate / aluminate cement.

16. The self-compacting concrete with slab removal according to claim 15, characterized in that, The mass ratio of ordinary silicate cement to sulfoaluminate / aluminate cement is 1:(0.125~8).

17. The self-compacting concrete with slab removal according to claim 1, characterized in that, The fumed silica nano-toughened high-strength micro powder is prepared by the following method: halosilane is subjected to gas-phase hydrolysis reaction with hydrogen and oxygen-containing gas at high temperature, and the generated fumed silica microparticles are then rapidly cooled to aggregate into large fumed silica particles. After deacidification treatment, the large fumed silica particles are dried, filtered and ground. The obtained deacidified fumed silica is mixed with silica micro powder to obtain fumed silica nano-toughened high-strength micro powder.

18. The self-compacting concrete with slab removal according to claim 1, characterized in that, The modified sulfonated phenolic resin is prepared by the following method: phenol and formaldehyde are subjected to a polycondensation reaction in the presence of an alkali metal hydroxide salt. The resulting polycondensation product and sodium p-aminobenzenesulfonate are dissolved in a bisulfite salt for modification. After the modification reaction is completed, silicic acid is added to continue the high-temperature reaction. Water is added during the high-temperature reaction. The resulting high-temperature reaction product is the modified sulfonated phenolic resin.

19. The self-compacting concrete with slab removal according to claim 18, characterized in that, The conditions for the polycondensation reaction include a temperature of 50℃~70℃ and a time of 20min~60min.

20. The self-compacting concrete with slab removal according to claim 18, characterized in that, The conditions for the modification reaction include a temperature of 80℃~120℃ and a time of 1h~3h.

21. The self-compacting concrete with slab removal according to claim 18, characterized in that, The conditions for the high-temperature reaction include a temperature of 80℃~120℃, a time of 2h~5h, and water added every 50min~70min, for a total of 2~4 times.

22. The self-compacting concrete with slab removal according to claim 18, characterized in that, The alkali metal hydroxide is potassium hydroxide and / or sodium bisulfite.

23. The self-compacting concrete with slab removal according to claim 1, characterized in that, The viscosity modifier contains 1-10 parts by weight of fused mullite, 5-25 parts by weight of tabular corundum, 10-25 parts by weight of bentonite, 3-10 parts by weight of ceramic micro powder, 10-30 parts by weight of sodium nitrate, 10-50 parts by weight of diatomaceous earth, 3-10 parts by weight of sodium maltose, 1-15 parts by weight of gum arabic, 1-5 parts by weight of polyvinyl alcohol, 1-8 parts by weight of sodium polyacrylate, 1-10 parts by weight of propylene glycol alginate, and 3-20 parts by weight of silica fume.

24. The method for preparing self-compacting concrete according to any one of claims 1 to 23, characterized in that, The method includes mixing the components of a liquid material evenly to obtain a liquid material; and mixing the components of a dry material evenly to obtain a dry material.

25. The application of the self-compacting concrete with slabs according to any one of claims 1 to 23 in the construction field.

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