Concrete capable of inhibiting early crack propagation

Abstract

The invention discloses concrete capable of inhibiting early crack propagation. The concrete is prepared from components in weight ratio as follows: 100 parts of Portland cement, 260-320 parts of natural sand, 370-430 parts of natural stone, 20-30 parts of fly ash, 20-35 parts of ground slag, 0.05-2.00 parts of a water reducer, 0-10 parts of an expansive agent, 0-3 parts of a concrete shrinkage reducing agent, 0-0.3 parts of fiber and 50-80 parts of water. The concrete has the advantages of low material cost and high durability, and early crack propagation is inhibited remarkably.

Description

technical field [0001] The invention belongs to the field of concrete materials, and in particular relates to a concrete that suppresses the development of initial cracks. Background technique [0002] During the setting and hardening process of the concrete structure, with the progress of cement hydration and natural evaporation, the internal moisture gradually decreases, and generally there will be a volume shrinkage of about 0.2‰. The physical and chemical properties and shrinkage characteristics of concrete change under the influence of factors such as variety, quality, stability, aggregate mud content, admixtures and admixtures, mix ratio, water-cement ratio, and cement dosage per unit volume. [0003] The uneven shrinkage and the local stress concentration caused by the shrinkage of the concrete structure to a certain extent will cause cracks in the concrete structure. Cement will release a lot of heat during the setting and hardening process. In the early stage of co...

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Problems solved by technology

[0004] At the same time, based on the above principles, cracks caused by concrete material problems during construction tend to be widely distributed in the concrete structure, causing great harm

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