High-strength anti-crack concrete and preparation method thereof

Abstract

The invention relates to high-strength anti-crack concrete and a preparation method thereof. The high-strength anti-crack concrete comprise, by weight, 450-500 parts of cement, 40-60 parts of fly ash,30-50 parts of silica fume, 1050-1150 parts of coarse aggregate, 580-600 parts of fine aggregate, 140-160 parts of modified waste ABS plastic particles, 40-60 parts of modified zeolite powder, 0.5-0.9 parts of polypropylene fibers and 15.4-17.1 parts of a polycarboxylate superplasticizer, and a water-binder ratio is 0.20 to 0.25. The high-strength anti-cracking concrete provided by the inventionhas the advantages of small internal shrinkage stress, high overall strength, obvious shrinkage reduction effect, excellent anti-cracking performance, simple preparation method, cheap and easily available raw materials, utilization of waste materials and high environmental protection benefit.

Description

technical field

[0001] The invention belongs to the field of building materials, and in particular relates to a high-strength crack-resistant concrete and a preparation method thereof. Background technique

[0002] High-strength concrete has high compressive strength, high density and low porosity, and is widely used in high-rise building structures, long-span bridge structures and some special structures. However, high-strength concrete has large autogenous shrinkage in the early stage and large drying shrinkage in the later stage, and is easy to crack. In order to reduce the shrinkage of high-strength concrete and maximize the hydration degree of the cementitious material, internal curing agents, expansion agents, and anti-cracking fibers are generally used to solve the problem. , but as an important admixture, the expansion agent needs to adjust the dosage and ratio due to the difference in the development of concrete strength, which is difficult to control.

[0003] Shr...

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