Expansion fiber anti-crack waterproof concrete and preparation method thereof

Abstract

The invention relates to expansive fiber anti-crack waterproof concrete, which is prepared from the following components in parts by mass: 880 to 950 parts of sand, 970 to 1020 parts of gravel, 45 to 55 parts of fly ash, 280 to 320 parts of cement, 150 to 170 parts of water, 30 to 40 parts of stone powder, 35 to 50 parts of expansive fiber and 6.6 to 7.8 parts of additives. The preparation method comprises the following steps: pouring 970-1020 parts of broken stone, 880-950 parts of sand, 45-55 parts of fly ash and 280-320 parts of cement into a concrete mixer, uniformly mixing, adding 30-40 parts of stone powder and 35-50 parts of expansion fiber, continuously uniformly mixing, uniformly mixing 6.6-7.8 parts of admixture and 150-170 parts of water, adding into the mixer, and continuously uniformly mixing to obtain the concrete mixture. The concrete is good in impermeability and early-stage crack resistance, and is suitable for underground engineering, large-scale pools and other concrete engineering with high waterproof requirements.

Description

technical field [0001] The invention relates to the technical field of building material engineering, in particular to a crack-resistant waterproof concrete with expanded fibers and a preparation method thereof. Background technique [0002] Concrete is the most widely used building material in civil engineering. In most cases, the concrete is restricted by the formwork, steel bars or adjacent parts, and is in a restrained state. The shrinkage of the concrete will cause tensile stress due to the restraint. When the tensile strength and tensile deformation of the concrete are insufficient, cracks will occur, affecting the concrete. Excellent waterproof and anti-seepage performance, especially underground projects, large pools, various building basement projects, etc., are constantly infiltrated by groundwater. If the waterproof and anti-seepage performance of concrete is not good, groundwater will invade underground projects and cause leakage, seriously affecting Normal use ...

AI Technical Summary

Problems solved by technology

At present, in concrete construction, the expansion fiber anti-cracking waterproofing agent and other auxiliary materials in concrete are generally added according to experience, and the performance and effect are not stable.