Composite anti-corrosive rust inhibitor for preparing high-durability concrete

Abstract

The invention provides a composite anti-corrosion and anti-rust agent for preparing high-durability concrete, which comprises the following components in weight portion: 20 to 30 portions of anti-corrosion and anti-rust agent, 20 to 30 portions of super plasticizer, 1.0 to 3.0 portions of collapse protecting agent, 0.5 to 2.0 portions of adhesion promoter, 0.20 to 0.40 portion of air entraining agent, 0.05 to 0.20 portion of antifoaming agent, and 35 to 60 portions of water. The composite anti-corrosion and anti-rust agent has the advantages that the prepared concrete not only has anti-corrosion and anti-rust effects, but also can achieve good concrete fluidization, good cohesiveness, good collapse protecting property, small diffusion coefficient (Da) of concrete chloride ion, and good freezing-thawing resistant circulating property under the condition of low water to glue ratio.

Description

technical field [0001] The invention relates to a composite anti-corrosion and rust inhibitor for concrete, in particular to a concrete anti-corrosion and freeze-thaw damage caused by harsh environments such as ocean and offshore, deicing salt, saline-alkali land, and high cold. Composite anti-corrosion and rust inhibitor. Background technique [0002] In 1995, the Hong Kong Civil Engineering Department entrusted Taywood Engineering Company to conduct a detailed investigation on the structural conditions of 93 large, medium and small wharves in Hong Kong. The critical concentration (0.06% of the weight of concrete) to cause corrosion is reached. Beijing Xizhimen Flyover had to be dismantled and rebuilt (completed in 1979 and demolished in 1999) due to steel corrosion caused by deicing salt, 50% of the columns cracked and peeled off after only 19 years of service. The survey literature in 2000 in the United Kingdom showed that steel bar corrosion damage was the main factor ...

AI Technical Summary

Problems solved by technology

[0003] (1) The pumping agent and anti-corrosion and rust inhibitor are added separately, which brings inconvenience to the construction, especially the powder anti-corrosion and rust inhibitor;

[0004] (2) Traditional pumping agents and anti-corrosion and rust inhibitors have poor adaptability, and the concrete mixture diverges and has poor cohesion, which is particularly unfavorable to the durability of concrete;

[0005] (3) It is difficult to realize the fluidization of concrete with low water-to-binder ratio by using traditional pumping agents and anti-corrosion and rust inhibitors, so the amount of water added to the prepared concrete is relatively high, and the chloride ion diffusion coefficient of the concrete is relatively large;

[0006] (4) The slump loss of concrete mixture prepared by traditional pumping agent and anti-corrosion and rust inhibitor is relatively large, which cannot meet the requirements of engineering construction

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