A kind of cement-based concrete waterproof coating and its preparation and application method

Abstract

The invention discloses cement-based waterproof concrete paint. According to the technical scheme, the cement-based waterproof concrete paint is characterized by comprising substances in parts by weight as follows: 0.9-1.8 parts of sodium nitrate, 2-3 parts of sodium carbonate, 2.5-3.6 parts of sodium sulfate, 0.05-0.15 parts of calcium chloride, 0.75-1.15 parts of calcium carbide, 0.8-1 part of lime, 36-40 parts of cement, 39-49 parts of sand and 8-10 parts of water. The cement-based waterproof concrete paint is healthy, environment-friendly, relatively low in cost, good in weather resistance and not prone to peeling, and a film forming substance takes short time to coagulate.

Description

technical field [0001] The invention relates to the field of building materials, more specifically, it relates to a cement-based concrete waterproof coating and a preparation and application method thereof. Background technique [0002] Concrete is an engineering composite material in which aggregates are bonded into a whole by cementitious materials. It is widely used in the field of building materials. After the concrete is hardened, a large number of pores and cracks are left due to the evaporation of water. Under the erosion of carbon dioxide, water, chloride ions, sulfate and other media, it is inevitable to be corroded by external factors, and the concrete will be destroyed at an accelerated rate. will be greatly shortened. Therefore, in engineering, the concrete surface is often protected by applying waterproof coatings. Most of the existing waterproof coatings are cement-based composites, and their performance depends on the type of chemical admixture. Improper comp...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many studies on concrete structure waterproof coatings on the market, mainly divided into two categories, one is polyurethane waterproof coating, this type of waterproof coating is usually applied with organic materials such as toluene and xylene. The other type is emulsion, for example, a silane-modified acrylic emulsion with room temperature crosslinking characteristics obtained by a soap-free emulsion polymerization disclosed in Patent No. 201210480382.3. The cost of application is high, and the main components of the chemical external admixtures of these two types of waterproof coatings are organic polymer paint films. The film-forming substances have a long solidification time and poor weather resistance. Compatible disadvantages, generally within 2 to 3 years, as the temperature changes with thermal expansion and contraction, it will crack and peel off

Images