Aqueous concrete anti-carbonization coating

Abstract

The invention relates to the technical field of concrete, solves the problem that concrete is carbonized, and in particular relates to an aqueous concrete anti-carbonization coating. The aqueous concrete anti-carbonization coating is composed of three parts: a primer, middle paint and surface paint. The primer contains the following raw materials in percentage by weight: deionized water, a flatting agent, a defoamer, a film forming agent, a special penetrant and a thickener; the middle paint contains two components: the component A contains the following raw materials: deionized water, an emulsion, an anti-carbonization assistant and a mildew preventive; the component B contains the following raw materials: special cement, quartz sand and an enhancer, wherein the components A and B are uniformly mixed in a proportion of 1: 4; the surface paint contains the following raw materials: an acrylic emulsion, deionized water, a mildew preventive, corrosion-resistant pigments and filler, a filmforming agent, a special assistant, a defoamer, a thickener and a flatting agent. The aqueous concrete anti-carbonization coating provided by the invention prevents carbonization reaction of concreteeffectively, improves the impervious performance of concrete, reduces the permeability in corrosive ions in water such as chlorine ions and improves the freeze-thaw stability of concrete while preventing carbonization reaction of concrete.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a water-based concrete anti-carbonization coating. Background technique [0002] With the rapid development of the economy, whether it is house construction, bridge construction, etc., a large number of concrete structures are used. As these engineered structures age, the durability of concrete materials and structures is of increasing concern. Concrete carbonation is one of the important indicators of concrete, and it is a kind of chemical corrosion suffered by concrete. The CO2 gas in the air penetrates into the concrete and reacts with alkaline substances to form carbonate and water. The process of reducing the alkalinity of concrete is called concrete carbonation, also known as neutralization. After carbonization, the alkalinity of concrete is reduced. When carbonation exceeds the protective layer of concrete, under the condition of water and air, the concrete will lose it...

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Problems solved by technology

At the same time, carbonation increases the number of hydrogen ions in the concrete pore solution, thus weakening the protective effect of concrete on steel bars

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