Underground anti-cracking and impermeable concrete with strength grade no more than C50 and preparation method thereof

Abstract

The invention discloses underground anti-cracking and impermeable concrete with strength grade no more than C50. The underground anti-cracking and impermeable concrete is mainly prepared from a binding material, clastic rock, sand water and admixture, wherein the binding material is cement, mineral powder and coal ash; the admixture is a water reducer or an anti-cracking and impermeable agent and a water reducer. According to the underground anti-cracking and impermeable concrete prepared by the preparation method, green high-performance concrete is prepared from a lot of mineral powder and coal ashes in a compounding manner; the dosage of the cement for C30-C50 anti-cracking and impermeable concrete is reduced by 30-50% in comparison with that of common concrete, the production cost of the concrete is reduced, and the underground anti-cracking and impermeable concrete plays a protective role on the environment, and has significant economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the field of new inorganic non-metallic materials of civil construction science and technology, and relates to a multi-component composite technology prepared by using anti-seepage and anti-cracking agent, polycarboxylate high-performance water reducing agent, S95 mineral powder, fly ash and cement. The impermeability grade is greater than the crack-resistant concrete of P12. Background technique [0002] Concrete is the main material of modern engineering structures, and the annual consumption of concrete in my country is about 2 billion m 3 , ranks among the top in the world. With the continuous development of material science and engineering technology and the continuous improvement of concrete performance, concrete is increasingly used in important structural parts such as super high-rise buildings, water conservancy dams, nuclear power plants, and underground buildings. [0003] Due to design problems, construction probl...

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Problems solved by technology

[0005] In order to solve the cracking problem of concrete, the main method adopted at home and abroad is to use the expansion agent and anti-cracking fiber in combination. This method not only has high cost, but also has strict maintenance requirements for concrete, and the cracking resistance of concrete is often caused by improper maintenance. Insufficient performance; in order to solve the impermeability problem of concrete, various waterproofing agents are usually used, resulting in higher cost of concrete

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