Concrete carbonization inhibitor

Abstract

The invention relates to a concrete carbonization inhibitor which mainly comprises a water-soluble high-molecule polymer polyving akohol (PVA) solution which is formed into a film easily and acrylic ester emulsion and comprises the following materials in percentage by weight: 5 to 15 percent of polyving akohol, 0.02 to 0.05 percent of defoaming agent, 1 to 4 percent of acrylic ester, 0.5 to 3 percent of emulsifying agent and 80 to 93 percent of water, wherein a polyving akohol and acrylic ester compound film has high gas isolation performance, high tolerance and high anti-aging performance and can effectively prevent gas and water from entering concrete, so that the anti-carbonization capacity of the concrete is improved; and simultaneously other corrosive substances can be prevented from entering the concrete, thus the durability of the concrete is improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for preparing a concrete surface carbonation inhibitor. Background technique [0002] Concrete carbonation is also called concrete carbonation, which is a kind of "neutralization" of concrete. The main reason is that the carbon dioxide in the environment reacts with the calcium hydroxide in the concrete system, resulting in a decrease in the pH of the concrete system. Carbonation of concrete can cause the following hazards: [0003] 1. Reduce the pH of the concrete system, and gradually disintegrate the hardened cement stone (C-S-H decomposition), resulting in a decrease in the mechanical properties of the concrete, or even failing to reach the designed strength level, and damaging the quality of the concrete; [0004] 2. For reinforced concrete, due to carbonization, the protective film of steel reinforcement is destroyed. At the same time, carbonization al...

AI Technical Summary

Problems solved by technology

[0003] 1. Reduce the pH of the concrete system, and gradually disintegrate the hardened cement stone (C-S-H decomposition), resulting in a decrease in the mechanical properties of the concrete, or even failing to reach the designed strength level, and damaging the quality of the concrete;

[0004] 2. For reinforced concrete, due to carbonization, the protective film of steel reinforcement is destroyed. At the same time, carbonization also makes it easy for oxygen to reach the surface of steel reinforcement, resulting in electrochemical corrosion of steel reinforcement, which seriously reduces the performance of reinforced concrete.

[0007] However, there are certain disadvantages in the method of manually wrapping plastic film: 1. The labor intensity is relatively high. At least 2 people can wrap a concrete column at the same time, which consumes a lot of labor costs. 2. The plastic film must be close to the surface of the concrete column, but in the actual operation process, especially when the wind is strong, the plastic film is easy to bulge or even be broken by the wind. The barrier effect on carbon dioxide will be greatly reduced; 3. Plastic film is a consumable and cannot be recycled, which not only causes waste, but also causes certain "white pollution"