High-impermeability concrete and preparation method thereof

Abstract

The invention relates to the field of building materials, and particularly discloses high-impermeability concrete and a preparation method thereof. The high-impermeability concrete is prepared from the following raw materials in parts by weight: 200 to 400 parts of cement, 80 to 200 parts of water, 70 to 90 parts of fly ash, 850 to 920 parts of gravel, 0.3 to 5 parts of silane coupling agent, 30 to 60 parts of ethylene-vinyl acetate copolymer and 4 to 12 parts of nano aluminum oxide. The preparation method comprises the following steps: S1, carrying out melt blending on the silane coupling agent, the ethylene-vinyl acetate copolymer and the nano aluminum oxide according to the formula ratio to obtain a blend; s2, uniformly mixing the blend with the cement, the water, the fly ash and the gravels according to the formula ratio to obtain the anti-permeability concrete. According to the high-impermeability concrete disclosed by the invention, the impermeability of the concrete is improved while the strength of the concrete is ensured.

Description

technical field [0001] The application relates to the field of building materials, more specifically, it relates to a high impermeability concrete and a preparation method thereof. Background technique [0002] Impervious concrete refers to a building material that uses cement as the gel material, water, sand, and stones as the main raw materials, and admixtures as auxiliary materials to reduce the permeation channels of the concrete by changing the pore structure of the concrete. [0003] Concrete generally has large voids. When it is used to construct buildings that have been flooded for a long time such as canals, ordinary concrete has poor impermeability and is easy to seep water, resulting in poor durability of the building. Seriously endanger the building safety, endanger people's life and property safety. In order to improve the impermeability of concrete, people often add expansion agent to the concrete to make impermeable concrete. The expansion agent can stabiliz...

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Problems solved by technology

[0004] Expansion agents mainly include ettringite and calcium oxide. The alkali content of ettringite expansion agents is relatively high, which can easily lead to a decrease in the strength of impermeable concrete; the expansion speed of calcium oxide expansion agents is too fast, and the shrinkage of concrete The speed is not coordinated, it is difficult to effectively improve the impermeability of concrete

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