Light high-crack-resistance cement concrete

Abstract

The invention provides light high-crack-resistance cement concrete which comprises the following materials in parts: 20-50 parts of cementing material, 10-20 parts of junked tire rubber grains, 0.08-0.3 parts of silane coupling agent, 20-40 parts of river sand, 10-20 parts of water, 0.3-0.6 parts of water reducing agent and 0.8-2 parts of polymeric fiber, wherein the cementing material comprises the following materials in parts: 60-80 parts of cement, 10-30 parts of fly ash, 5-10 parts of silicon ash and 3-8 parts of fine limestone powder, and the polymeric fiber comprises the following materials in parts: 70-90 parts of polyvinyl alcohol fiber and 10-30 parts of polypropylene fiber. According to the light high-crack-resistance cement concrete, a junked tire is recycled, and the density of the concrete is reduced greatly at the same time; the shock resistance and the deformation resistance of the concrete are improved greatly; an ordinary concrete brittle failure mode is changed; and strain hardening is achieved.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a lightweight high-crack-resistant cement concrete. Background technique [0002] Cement concrete is the most used building material in the world today, but its inherent brittleness, poor toughness, and low tensile strength have a great impact on the durability of cement concrete structures. In addition, ordinary cement concrete has a large self-weight, which leads to a large cross-sectional size of the structure and a high reinforcement ratio, which brings great restrictions to the development of modern building structures in the direction of super high-rise and long-span. With the development of the automobile industry, the annual production of waste tires in my country is about 200 million, which brings serious black pollution to the social environment. Landfilling, stacking or incineration of them will cause secondary pollution. If the waste tires are ground into rubber par...

AI Technical Summary

Problems solved by technology

However, the density of the material is still relatively high, and the apparent density of the mixture is 2050kg / m 3 Above, for long-span and super high-rise buildings, it will still produce a lot of self-weight, which will increase the investment cost of infrastructure construction.

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