Anti-permeability concrete admixture

Abstract

The invention discloses an anti-permeability concrete admixture. The anti-permeability concrete admixture comprises the following components in parts by weight: 0.1 to 0.3 part of white carbon black, 15 to 20 parts of superfine mineral powder, 0.3 to 0.5 part of polyvinyl alcohol, 8 to 10 parts of light calcined magnesia, 1 to 3 parts of aluminium oxide, and 66.2 to 75.6 parts of fly ash, and the total amount of all the components is 100 parts. The anti-permeability concrete admixture disclosed by the invention has the advantages that the prepared admixture utilizes optimized combination of various superfine mineral admixtures to optimize pore structures, and improves a transition region through a secondary pozzolanic reaction, and then combines resin materials to improve the hydrophobicity of concrete so as to comprehensively improve the impermeability of the concrete.

Description

technical field [0001] The invention relates to an admixture for improving the impermeability of concrete. Background technique [0002] Concrete is a substance that forms cementitious strength through hydration of silicate cementitious materials such as cement, and binds aggregates such as sand and stone together to form strength. Since its main component, cement stone, is produced by hydration of cement, the gel pores formed by hydration have become an inherent feature of concrete. These gel pores also provide convenient channels for the diffusion of various substances. [0003] Concrete with poor impermeability is more susceptible to corrosion of the internal steel bars, and the service life of concrete will be greatly shortened. Poor impermeability of concrete used in underground buildings will cause leakage and seriously affect the performance of the building. Therefore, how to optimize the gel pore structure and improve the impermeability of concrete has become an im...

AI Technical Summary

Problems solved by technology

[0003] Concrete with poor impermeability is more likely to corrode the internal steel bars, and the service life of concrete will be greatly shortened. The poor impermeability of concrete used in underground buildings will cause leakage and seriously affect the performance of the building.