Reinforced concrete rust inhibitor and use method thereof

Abstract

The invention discloses a reinforced concrete rust inhibitor. The rust inhibitor consists of the following three components: a mixture of CuO and Ca (NO2) 2 amino alcohols, and fatty acid esters; wherein the molar ratio of CuO and Ca (NO2)2 in the mixture of CuO and Ca (NO2)2 is 2:1; the usage amount of the mixture of CuO and Ca (NO2)2 is from 0.1 to 1.5% of the total amount of the reinforced concrete; the usage amount of the amino alcohols is from 0.1 to 3% of the total amount of the reinforced concrete; and the usage amount of the fatty acid esters is from 0.1% to 2.5% of the total amount of the reinforced concrete. The invention also discloses a use method for the reinforced concrete rust inhibitor. Three different components are used in the rust inhibitor provided by the invention in, so the rust inhibitor is good in anti-rust and repair performance, affordable, and environmentally friendly.

Description

technical field [0001] The invention belongs to the field of reinforced concrete additives, and in particular relates to a reinforced concrete rust inhibitor and a using method thereof. Background technique [0002] As a structural material, reinforced concrete is widely used in structures such as roads, bridges, tunnels and dams. With the development of time, coupled with the influence of the environment, such as sunlight, rain, air quality conditions, etc., the steel bars will be corroded, which will pose a serious threat to the safety of reinforced concrete structures. In general, the highly alkaline pore solution of reinforced concrete forms a dense passivation film with good corrosion resistance on the surface of the steel bar. However, when corrosive media (such as chloride ions and carbon dioxide) enter the steel / concrete interface, the composition and properties of the pore solution around the steel bar will change, destroying the passivation film on the steel bar s...

AI Technical Summary

Problems solved by technology

Among them, the inorganic reinforced concrete rust inhibitor has good antirust ability, but it cannot penetrate and diffuse, and the repair ability is poor; the organic reinforced concrete rust inhibitor is non-toxic and environmentally friendly, and has a certain penetration and repair ability, but it is resistant to higher concentrations of chlorine. Poor ion suppression

Composite reinforced concrete rust inhibitor has the best product and technical performance, but the cost is relatively high

In addition, it is difficult to achieve the goal of good overall performance, and has been researched and applied abroad, and there are few related research and technologies in China.