A composite anticorrosion and rust inhibitor for concrete

Abstract

The invention discloses a compound concrete anti-corrosion and rust-resistant agent which comprises the following components in parts by weight: 15-30 parts of a polycarboxylic acid water reducing agent, 3-12 parts of sodium dodecyl sulfate, 15.7-20.6 parts of N-dimethylethanolamine, 1-5 parts of sodium molybdate, and 50-60 parts of water. The compound concrete anti-corrosion and rust-resistant agent can block capillary holes in the concrete, improves the chloride ion permeability resistance of concrete, can significantly alleviate the damage of chloride ions on a reinforcing steel bar passivation film, enhances the sulfate corrosion resistant ability of the concrete, has excellent rust-resistant performance and good repair performance, can enhance durability of the concrete and the comprehensive anti-corrosion ability of the concrete, and significantly improves the durability of buildings.

Description

technical field [0001] The invention relates to a composite anticorrosion and rust inhibitor for concrete. Background technique [0002] Concrete has been used in large-scale engineering construction for more than 150 years. Looking at the development process of concrete technology, it can be seen that the development path of concrete technology mainly follows the three technical routes of compounding, high strengthening and high performance. In the initial stage of the development of concrete technology, people focused their energy on how to improve the strength of concrete, and the performance of concrete was represented by the compressive strength of concrete. With the continuous advancement of science and technology, the strength of concrete has been continuously improved, and the brittleness of concrete has also been continuously increased. The accidents of the overall collapse of the structure due to the deterioration and damage of concrete have occurred one after ano...

AI Technical Summary

Problems solved by technology

2. Concrete is not compacted or there are cracks causing steel corrosion: the concrete water-cement ratio is too large, the amount of cement is too small, the concrete is not compacted and the maintenance is not in place, and exposed bars, honeycombs, pockmarks, etc. are produced during the concrete pouring process , it will cause the concrete pores to be too large or have cracks, so that water and carbon dioxide gas in the air will invade, causing steel bars to corrode

3. Chlorine salts added to concrete cause corrosion of steel bars: Chloride salts are very effective in improving the early strength and antifreeze of concrete, but if the amount is too much, excessive chloride ions will destroy the passivation film on the surface of the steel bars, resulting in steel corrosion

Cathodic anti-corrosion agents such as: phosphate, carbonate, fatty acid ester, etc., the amount of this type of anti-corrosion agent is often large, which increases the cost of concrete and is inconvenient to promote