Patching material for preventing and treating corrosion and disease of tunnel lining concrete salt

Abstract

The invention discloses a patching material for preventing and treating the corrosion and the disease of a tunnel lining concrete salt. The patching material consists of ordinary portland cement, a silica alumina mineral component, an expansion component, a rubber mass polymer component, polyacrylonitrile fiber and a condensation adjusting component, wherein the mass ratio of the components is 60:30:8:2-3:0.3:2-4. The patching material can be used for effectively patching, preventing and treating the corrosion and the disease of the tunnel lining structural salt, obviously improving the endurance quality of the existing disease tunnel structure, and prolonging the service life of the tunnel structure, and has the characteristics of being high in cost performance, simple to operate and good in adaptability.

Description

technical field [0001] The invention relates to a cement-based repair material for preventing and curing the salt erosion disease of tunnel lining concrete, which prolongs the service life of the existing tunnel lining concrete structure under the condition of salt erosion. Background technique [0002] Tunnel is a kind of cavity-shaped structure buried under (rock) soil layer. The outside is affected by the surrounding rock (soil) and water and ion medium in the rock layer; the internal structure is adjacent to the air and is affected by the relatively closed atmospheric environment; At the same time, in the operating state, it is also affected by the operation of pedestrians and vehicles. [0003] The special structural type of the tunnel is obviously different from the general concrete structure, which is mainly reflected in the fact that both the inside and outside of the lining concrete structure are affected by the environmental medium, and the damage and deterioration...

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problem of severe corrosion and deterioration of the existing tunnel lining concrete under the action of salt erosion, this invention aims at the structural characteristics of the tunnel and the erosion mechanism of typical aggressive salts on cement-based materials in the natural environment, and uses the knowledge of cement concrete science, physical chemistry, etc. , put forward the technical principle of anti-salt erosion disease resistance by improving the resistance of the repair material itself to the chemical corrosion of erosive salts, the effective release of salt crystallization pressure, and the improvement of material toughness

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