A concrete that can effectively resist the erosion of organic solvents

Abstract

The invention provides a concrete that can effectively resist the erosion of organic solvents. The concrete includes 150-400 parts by weight of cement, 50-150 parts of fly ash, 10-120 parts of mineral powder, 600-900 parts of sand, gravel 700‑1100 parts, 3‑10 parts of water reducing agent, 20‑100 parts of styrene acrylate polymer emulsion and 100‑200 parts of water; wherein the average particle size of latex particles of styrene acrylate polymer emulsion is ≤0.4 micron, mineral Powder specific surface area ≥ 550m 2 / kg, fly ash is Class I or Class II in Class F, and the water-cement ratio of concrete is ≤0.5. The concrete of the present invention not only has excellent resistance to organic solvents at the initial stage, but also can adapt to certain capillary pores, micropores and cracks while maintaining the performance of resistance to organic solvents, thus providing long-term and effective resistance to organic solvent erosion. The present invention also provides a method for preparing the above-mentioned concrete that can effectively resist the erosion of organic solvents.

Description

technical field [0001] The invention relates to a building material, in particular to a cement concrete, and more particularly to a concrete capable of effectively resisting the erosion of organic solvents. The present invention also relates to a method for preparing the above-mentioned concrete that can effectively resist the erosion of organic solvents. Background technique [0002] When ordinary cement concrete is in contact with organic solvents for a long time, it will be corroded by organic solvents and the concrete structure will be damaged. Common organic solvents include gasoline, vegetable oil, acetone, butanol, etc. These organic solvents can penetrate into the interior of concrete through the capillary pores, micropores and cracks of concrete, and then penetrate into the interface between hardened cement paste and coarse and fine aggregates, making The interface bond between the hardened cement paste and the aggregate is destroyed, resulting in a serious decreas...

AI Technical Summary

Problems solved by technology

Common organic solvents include gasoline, vegetable oil, acetone, butanol, etc. These organic solvents can penetrate into the interior of concrete through the capillary pores, micropores and cracks of concrete, and then penetrate into the interface between hardened cement paste and coarse and fine aggregates, making The interface bond between the hardened cement paste and the aggregate is destroyed, resulting in a serious decrease in the interface bond force, resulting in a decrease in the strength of the concrete, and even loosening and peeling from the surface to the inside, and finally completely collapsing and losing its use function

[0003] One of the common ways to improve the resistance of concrete to organic solvents is to reduce the water-cement ratio, reduce the number of capillary pores, micropores and cracks, and increase the compactness of concrete, thereby improving the performance of organic solvent resistance, but this method can only improve The initial performance of concrete, when the concrete is affected by various factors such as long-term shrinkage and use, the pores, micropores and cracks of concrete will continue to expand and connect, and its performance will decline sharply

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