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CN-122011818-A - Mildew-proof dampproof thick coating capable of being used in humid environment and construction method

CN122011818ACN 122011818 ACN122011818 ACN 122011818ACN-122011818-A

Abstract

The invention provides a mildew-proof moisture-proof thick coating type coating and a construction method for a humid environment, wherein the mildew-proof moisture-proof thick coating type coating comprises, by mass, 5-10 parts of gray calcium, 5-15 parts of mineral powder, 10-15 parts of metakaolin, 10-15 parts of 80-120 mesh quartz sand combined powder, 5-10 parts of heavy calcium combined powder, 10-15 parts of 200-mesh quartz sand, 5-15 parts of 300-mesh modified zeolite powder, 5-10 parts of white cement, 0.1-0.2 part of a water reducer, 1-3 parts of latex powder, 0.5-1 part of 10-ten-thousand-viscosity cellulose, 0.5-1 part of an alkali inhibitor and 0.2-0.5 part of a pH regulator, wherein the 80-120-mesh quartz sand combined powder comprises 80-120-mesh quartz sand and 80-120-mesh modified quartz sand, and the heavy calcium combined powder comprises heavy calcium powder and modified heavy calcium powder. The coating can well inhibit the alkali return phenomenon of the wall body, and simultaneously can simplify the construction flow and improve the construction efficiency.

Inventors

  • WANG JUHUI
  • ZHANG SHIPENG
  • CUI DATIAN
  • ZHANG CHENXI

Assignees

  • 郑州聚合缘新材料科技有限公司
  • 郑州高聚粉体科技有限公司

Dates

Publication Date
20260512
Application Date
20260127

Claims (9)

  1. 1. The mildew-proof dampproof thick coating capable of being used in a humid environment is characterized by comprising the following raw materials in parts by weight: 5-10 parts of gray calcium, 5-15 parts of mineral powder, 10-15 parts of metakaolin, 10-15 parts of 80-120 mesh quartz sand combined powder, 5-10 parts of heavy calcium combined powder, 10-15 parts of 200 mesh quartz sand, 5-15 parts of 300 mesh modified zeolite powder, 5-10 parts of white cement, 0.1-0.2 part of water reducer, 1-3 parts of latex powder, 0.5-1 part of 10 ten thousand viscosity cellulose, 0.5-1 part of alkali inhibitor and 0.2-0.5 part of pH regulator; The 80-120 mesh quartz sand combined powder comprises 80-120 mesh quartz sand and 80-120 mesh modified quartz sand, and the heavy calcium combined powder comprises heavy calcium powder and modified heavy calcium powder; The modified heavy calcium powder and the 80-120 mesh modified quartz sand are respectively subjected to hydrophobic modification by adopting sodium stearate as a modifier; the 300-mesh modified zeolite powder is obtained by grinding and calcining zeolite raw materials; the total mass portion of the gray calcium, the mineral powder, the metakaolin, the 80-120 mesh quartz sand combined powder, the heavy calcium combined powder, the 200 mesh quartz sand, the 300 mesh modified zeolite powder and the white cement is 100 portions.
  2. 2. The mildew-proof and moisture-proof thick coating paint for the humid environment, which is characterized in that in the 80-120 mesh quartz sand combined powder, the part of the 80-120 mesh modified quartz sand is less than or equal to 10 parts, and the rest is the 80-120 mesh quartz sand.
  3. 3. The mildew-proof and moisture-proof thick coating paint for a humid environment according to claim 1 or 2, wherein the weight of the modified heavy calcium powder in the heavy calcium composite powder is less than or equal to 5 parts, and the balance is the heavy calcium powder.
  4. 4. The mildew-proof and moisture-proof thick coating capable of being used in a humid environment according to claim 3, wherein in the 80-120 mesh modified quartz sand, the sodium stearate accounts for 0.5% -1.0% of the mass of the 80-120 mesh quartz sand raw material.
  5. 5. The mildew-proof and moisture-proof thick coating capable of being used in a humid environment according to claim 1, wherein in the modified heavy calcium powder, the sodium stearate accounts for 0.5-1.0% of the weight of the heavy calcium powder raw material.
  6. 6. A thick coating of mildew-proof and moisture-proof type for wet environment according to claim 1, 2 or 5, wherein white cement is selected from the white cement with reference numeral 525.
  7. 7. The mildew-proof and moisture-proof thick coating for a humid environment according to claim 1,2 or 5, wherein the 300-mesh modified zeolite powder is obtained by grinding a zeolite powder raw material to 300 meshes, placing the ground zeolite powder raw material in an electric furnace, heating from normal temperature, heating to 110-130 ℃ at a temperature rising rate of 3-8 ℃ per minute, preserving heat for 10-20 min, continuously heating to 330-360 ℃ and preserving heat for 20-40 min, and finally cooling to room temperature along with the furnace.
  8. 8. A construction method of the mildew-proof and moisture-proof thick coating paint for a humid environment, which is characterized in that water is added according to the powder-water ratio of 1 (0.4-0.6) for stirring, and the paint is coated on a wall body in a batch mode and then directly sprayed on the wall body in a batch mode or is coated on the wall body in a batch mode for two times.
  9. 9. Use of a thick, mildew-and moisture-resistant coating according to any one of claims 1 to 7 for wet environments, characterized in that it is applied as a wall coating in a wet environment of a basement, hydraulic engineering, air-raid shelter or tunnel.

Description

Mildew-proof dampproof thick coating capable of being used in humid environment and construction method Technical Field The invention relates to the field of coatings, in particular to a mildew-proof and moisture-proof thick coating capable of being used in a humid environment and a construction method. Background The existing emulsion paint wall construction mode generally comprises base layer treatment and surface layer treatment. The base layer is usually leveled by putty, and is polished and leveled after being coated twice, and finally, local repair and polishing are performed. The top coat is typically applied in a two pass scheme using latex paint. In order to pursue the property of easy polishing, the putty is generally very low in strength, needs to be subjected to thin coating construction for many times, and is complex in construction steps and high in construction cost. Meanwhile, the putty has poor water resistance, and bacteria can be easily bred in a humid environment. The emulsion paint belongs to waterproof and airtight organic materials and is also suitable for bacterial growth. Therefore, the wall coating constructed by adopting the traditional coating and construction mode can quickly get moldy and fall off in a wet environment. It is found that the reason for the falling of the wall coating is mainly caused by alkali return of the wall. Namely, two basic layers of common coating are adopted, namely, the construction is directly carried out on a concrete poured wall, and the construction is carried out by taking cement mortar with the density of about two centimeters as the basic layer. The concrete poured wall and cement mortar are composed of cement, sand and stones, and the three materials contain alkali. Particularly sand and cobble, are materials with high alkali content. In a humid environment, the alkali in these materials will dissolve into the water, and as the water evaporates, the alkali will be released along with the water towards the surface of the coating. When the alkali dissolved in the water encounters carbon dioxide, the alkali becomes salt to become solid, and the volume becomes large, and the process is the alkali returning of the wall body. The coating of the wall is destroyed due to the large volume expansion. Especially when being applied to environments with poor air circulation and moist air such as basements, hydraulic engineering, air-raid shelters, tunnels and the like, the problems of mildew, chalking and falling of the coating are more serious, so that the sites have to frequently maintain and repair the wall surfaces. Therefore, based on the problems, it is imperative to develop an inorganic coating which has simple construction steps, can be used in a humid environment, is mildew-proof, moisture-proof and alkali-resistant, and has high bonding strength, so as to solve the problem of alkali return of the wall body in the place. Disclosure of Invention In order to better inhibit the alkali return phenomenon of a wall body and simplify the construction flow and improve the construction efficiency, the invention adopts the technical scheme that the mildew-proof and moisture-proof thick coating paint capable of being used in a humid environment comprises the following raw materials in parts by mass: 5-10 parts of gray calcium, 5-15 parts of mineral powder, 10-15 parts of metakaolin, 10-15 parts of 80-120 mesh quartz sand combined powder, 5-10 parts of heavy calcium combined powder, 10-15 parts of 200 mesh quartz sand, 5-15 parts of 300 mesh modified zeolite powder, 5-10 parts of white cement, 0.1-0.2 part of water reducer, 1-3 parts of latex powder, 0.5-1 part of 10 ten thousand viscosity cellulose, 0.5-1 part of alkali inhibitor and 0.2-0.5 part of pH regulator; The 80-120 mesh quartz sand combined powder comprises 80-120 mesh quartz sand and 80-120 mesh modified quartz sand, and the heavy calcium combined powder comprises heavy calcium powder and modified heavy calcium powder; the modified heavy calcium powder and the 80-120 mesh modified quartz sand are respectively prepared by adopting sodium stearate as a modifier to carry out hydrophobic modification on a heavy calcium powder raw material and an 80-120 mesh quartz sand raw material; the 300-mesh modified zeolite powder is obtained by grinding and calcining zeolite raw materials; the total mass portion of the gray calcium, the mineral powder, the metakaolin, the 80-120 mesh quartz sand combined powder, the heavy calcium combined powder, the 200 mesh quartz sand, the 300 mesh modified zeolite powder and the white cement is 100 portions. Based on the above, in the 80-120 mesh quartz sand combined powder, the part of the 80-120 mesh modified quartz sand is less than or equal to 10 parts, and the rest is the 80-120 mesh quartz sand. Based on the above, in the triple superphosphate composite powder, the part of the modified triple superphosphate powder is less than or equal to 5 parts, and the rest is the trip