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CN-121975380-A - Concrete protective coating and preparation and use methods thereof

CN121975380ACN 121975380 ACN121975380 ACN 121975380ACN-121975380-A

Abstract

The invention discloses a concrete protective coating and a preparation method and a use method thereof, wherein the concrete protective coating comprises emulsion and powder. The preparation method comprises the steps of S1 preparing emulsion and S2 preparing powder. The application method comprises four steps of S1-S4. The concrete protective coating has the advantages that the anti-permeability, anti-freezing and thawing, anti-corrosion, anti-carbonization and anti-scouring and anti-wear capabilities are very excellent, the anti-permeability ensures that water cannot permeate into the concrete to be damaged by freeze thawing and degradation, the application range of the coating can be expanded by freeze thawing, the protective effect of the coating on the concrete is particularly remarkable particularly in cold areas such as North China, northeast, northwest and the like, the anti-corrosion performance cannot influence the service performance of the concrete due to carbonization of the concrete, and the anti-scouring capability can prevent the concrete from being worn in absolutely severe flood environments such as high flow velocity and large flow.

Inventors

  • ZHANG BO
  • ZHAO YONGSHENG
  • ZHANG HAILI
  • LI HAIKANG

Assignees

  • 内蒙古中路华通建材有限公司
  • 中路华通(北京)科技有限公司

Dates

Publication Date
20260505
Application Date
20260205

Claims (8)

  1. 1. The concrete protective coating is characterized by comprising, by weight, 70-90 parts of vinyl acetate-ethylene copolymer emulsion, 10-30 parts of polyvinyl alcohol rubber powder, 0.1-0.2 part of thixotropic lubricant, 0.2-0.5 part of dispersing agent, 0.2-0.5 part of suspending agent and 0.1-0.3 part of emulsion defoaming agent, wherein the mass ratio of the emulsion to the powder is 1:0.8-2.2, and the powder comprises, by weight, 45-55 parts of cement, 40-54 parts of heavy calcium powder or quartz powder, 0-20 parts of titanium pigment, 0-10 parts of ferric oxide toner, 5-10 parts of talcum powder, 0.02-0.1 part of dust suppressant and 0.1-0.5 part of calcium stearate.
  2. 2. A concrete protective coating according to claim 1, wherein the thixotropic lubricant is a starch ether thixotropic lubricant or a TH4601 thixotropic lubricant.
  3. 3. The concrete protective coating of claim 1, wherein the dispersant is an anionic coating dispersant.
  4. 4. A concrete protective coating according to claim 1, wherein the suspending agent is a magnesium aluminum silicate suspending agent.
  5. 5. The concrete protective coating of claim 1, wherein the emulsion defoamer is a silicone defoamer.
  6. 6. A concrete protective coating according to claim 1, wherein the cement is PO42.5 cement.
  7. 7. A method for preparing a protective coating for concrete according to any one of claims 1 to 6, characterized in that it comprises the following steps: S1 preparation of emulsion S1-1, uniformly mixing and stirring polyvinyl alcohol rubber powder, a thixotropic lubricant, a dispersing agent, a suspending agent and an emulsion defoaming agent to prepare powder A; S1-2, adding the powder A and vinyl acetate-ethylene copolymer emulsion into a first reaction kettle, and stirring for 15-25min to obtain a first emulsion; S1-3, conveying the first emulsion into a second reaction kettle, stirring for 15-25min, and standing for 1-1.2h to obtain emulsion; s2 preparing powder S2-1, starting a stirrer, wherein the rotating speed of the stirrer is 60-100r/min; s2-2, adding cement into the stirrer; s2-3, adding titanium dioxide, ferric oxide toner, talcum powder, dust suppressant and calcium stearate into the stirrer; S2-4, adding heavy calcium powder or quartz powder into the stirrer, and stirring for 20-25min to obtain powder.
  8. 8. A method of using a concrete protective coating according to any one of claims 1 to 6, characterized in that it comprises the steps of: s1, adding emulsion into a stirrer, and starting the stirrer; s2, adding powder into the stirrer; s3, stirring for 2-5min at a rotating speed of 200r/min, and then stirring for 5-10min at a rotating speed of 200-1000 r/min to obtain the protective coating; and S4, uniformly smearing the protective coating on the concrete part to be protected.

Description

Concrete protective coating and preparation and use methods thereof Technical Field The invention relates to the technical field of concrete protective coating, in particular to a concrete protective coating and a preparation and use method thereof. Background The concrete protective coating is a protective material applied to the surface of a concrete structure, is mainly used for scenes such as ground, inner and outer walls of buildings, storage tanks, underground pipelines, water pools and the like, and can resist chemical corrosion, chloride penetration and freeze thawing damage. Common concrete protective coatings include epoxy coatings, ethylene coatings, acrylic latex coatings, chlorinated coatings and the like, wherein the epoxy coatings are good in wear resistance and corrosion resistance, but poor in toughness, high in brittleness and poor in scouring resistance, are airtight, cannot penetrate out of the coating once a concrete base layer is permeated, are easy to foam and bulge, the ethylene coatings are good in corrosion resistance, but poor in weather resistance and wear resistance, are easy to pulverize, are not suitable for being directly used outdoors, the acrylic latex coatings are rich in color, but poor in chemical resistance and wear resistance, the film formation is greatly influenced by temperature and humidity, the film formation is difficult in a low-temperature high-humidity environment, the base layer is high in requirement and cannot be constructed on a wet base surface, and the chlorinated coatings are poor in chemical resistance and weather resistance, but poor in environmental protection. In conclusion, the concrete protective coating which has the advantages of leakage resistance, freeze thawing resistance, corrosion resistance, carbonization resistance, scouring resistance and abrasion resistance, low cost, high air permeability and easiness in construction is lacking in the market at present. Disclosure of Invention A first object of the present invention is to provide a concrete protective coating. The second aim of the invention is to provide a preparation method of the concrete protective coating. The third object of the invention is to provide a method for using the concrete protective coating. The first aim of the invention is implemented by the following technical scheme that the concrete protective coating comprises emulsion and powder, wherein the mass ratio of the emulsion to the powder is 1:0.8-2.2, the emulsion comprises, by weight, 70-90 parts of vinyl acetate-ethylene copolymer emulsion, 10-30 parts of polyvinyl alcohol rubber powder, 0.1-0.2 part of thixotropic lubricant, 0.2-0.5 part of dispersing agent, 0.2-0.5 part of suspending agent and 0.1-0.3 part of emulsion defoamer, and the powder comprises, by weight, 45-55 parts of cement, 40-54 parts of heavy calcium powder or quartz powder, 0-20 parts of titanium pigment, 0-10 parts of ferric oxide toner, 5-10 parts of talcum powder, 0.02-0.1 part of dust suppressant and 0.1-0.5 part of calcium stearate. Further, the thixotropic lubricant is a starch ether thixotropic lubricant or a TH4601 thixotropic lubricant. Further, the dispersant is an anionic paint dispersant. Further, the suspending agent is a magnesium aluminum silicate suspending agent. Further, the emulsion defoamer is an organosilicon defoamer. Further, the cement is PO42.5 cement. The second purpose of the invention is implemented by the following technical scheme that the preparation method of the concrete protective coating comprises the following steps: S1 preparation of emulsion S1-1, uniformly mixing and stirring polyvinyl alcohol rubber powder, a thixotropic lubricant, a dispersing agent, a suspending agent and an emulsion defoaming agent to prepare powder A; S1-2, adding the powder A and vinyl acetate-ethylene copolymer emulsion into a first reaction kettle, and stirring for 15-25min to obtain a first emulsion; s1-3, conveying the first emulsion into a second reaction kettle, stirring for 15-25min, and standing for 1-1.2h to obtain emulsion; s2 preparing powder S2-1, starting a stirrer, wherein the rotating speed of the stirrer is 60-100r/min; S2-2, adding cement into the mixer; s2-3, adding titanium dioxide, ferric oxide toner, talcum powder, dust suppressant and calcium stearate into the stirrer; S2-4, adding heavy calcium powder or quartz powder into the stirrer, and stirring for 20-25min to obtain powder. The third object of the invention is implemented by the following technical scheme that the application method of the concrete protective coating comprises the following steps: s1, adding the emulsion into a stirrer, and starting the stirrer; S2, adding the powder into a stirrer; s3, stirring for 2-5min at a rotating speed of 200r/min, and then stirring for 5-10min at a rotating speed of 200-1000 r/min to obtain the protective coating; and S4, uniformly coating the protective coating on the concrete part to be protected. The concrete prote