A kind of expansion anti-crack waterproofing agent and using method thereof

Abstract

The invention discloses an expansion anti-crack waterproof agent, which comprises the following raw materials in mass percentage: 5-30% of anti-crack expansion agent, 20-40% of microbeads, 25-45% of coal gangue, 0.1-8% of modified basalt fiber, Admixture 1‑5%. In the present invention, the anti-crack expansion agent and the modified basalt fiber can play a superimposed and compensatory shrinkage effect in the concrete, and have double anti-crack and waterproof functions; the modified basalt fiber makes it better combined with the concrete, without affecting the concrete On the basis of construction performance, the structural density of concrete is increased.

Description

technical field [0001] The invention belongs to the field of expansion and anti-cracking waterproof building materials, and in particular relates to an expansion and anti-cracking waterproofing agent and its application method. Background technique [0002] With the increasing number of construction projects, the problem of concrete shrinkage and cracking has become increasingly prominent, which has seriously affected the durability, bearing capacity and waterproof performance of concrete. There are three main reasons for cracks in concrete structures: one is caused by external loads, and the existence of such cracks is the most common, mainly due to problems such as unreasonable structural design, insufficient safety factor, lack of consideration of the possibility of construction, and insufficient structural rigidity; This kind of crack is caused by the secondary stress of the structure. Due to the discrepancy between the actual working state of the concrete structure and ...

AI Technical Summary

Problems solved by technology

At present, most projects use expansion agents or fibers to increase the compactness of concrete, to compensate for shrinkage, and to prevent concrete cracking, but traditional expansion agents or fibers are used in terms of dosage, use conditions, dispersion performance and curing conditions. Large impact, easy to cause large loss of concrete slump, shortened setting time, reduced strength, poor dispersion and other problems

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