Environment-friendly anti-freezing concrete and preparation method thereof

Abstract

The invention relates to the field of concrete, and particularly discloses environment-friendly anti-freezing concrete and a preparation method thereof. The concrete comprises the following raw materials in parts by weight: 240 to 280 parts of cement, 600 to 680 parts of fine aggregate, 25 to 65 parts of water, 2.5 to 2.9 parts of a water reducing agent, 1000 to 1400 parts of recycled aggregate, 4 to 8 parts of waste textile fiber, 25 to 30 parts of silica fume, 5 to 15 parts of metakaolin, 3 to 3.5 parts of nano-SiO2, 1.3 to 3.9 parts of calcium sulfate whiskers, 0.48 to 0.56 part of an air entraining agent, 0.072 to 0.084 part of basalt fibers and 1.44 to 1.68 parts of hydroxypropyl methyl cellulose. According to the concrete, waste resources are recycled, resources are saved, the environment is protected, the integrity and the compactness degree of the concrete are high, expansive force generated in the concrete under the freezing and thawing action is small, freezing resistance is high, and compressive strength after freezing and thawing circulation is high.

Description

technical field [0001] The application relates to the field of concrete, more specifically, it relates to an environment-friendly frost-resistant concrete and a preparation method thereof. Background technique [0002] Concrete is made of cement as the cementitious material, sand and stone as the aggregate, and mixed with water. At present, with the rapid development of the construction industry, concrete is widely used in building constructions such as foundations, pile foundations, and house construction. As the most basic and important material in building construction, concrete must have good durability, and frost resistance is one of the important indicators of concrete durability. [0003] Frost resistance refers to the ability of concrete to maintain its strength and appearance integrity after being subjected to multiple freeze-thaw cycles in the service environment. If the frost resistance of concrete is poor, when the outside temperature drops to freezing point, t...

AI Technical Summary

Problems solved by technology

If the frost resistance of concrete is poor, when the outside temperature drops to freezing point, the water in the concrete becomes ice and expands, generating a strong expansion force, the expansion force will exceed its tensile force, causing fine cracks in the concrete, and After repeated freezing and thawing, these cracks continue to expand, resulting in the reduction of the strength of the concrete until it is completely destroyed, which greatly reduces the durability of the concrete and affects the quality of the building and normal use.

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