Concrete rapid repairing material based on microbial mineralization and preparation method and application thereof

By performing hydrophobic modification and vacuum impregnation technology on porous particles, microorganisms and nutrients are immersed into the particle pores, solving the problems of insufficient microbial activity and difficulty in diffusion of mineralized products, and achieving strong interface bonding, environmentally friendly and crack self-repairing effects of rapid concrete repair materials.

CN119707433AActive Publication Date: 2025-03-28SOUTHEAST UNIV
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Patent Information

Application Number
CN202411872221.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-18
Publication Date
2025-03-28
Estimated Expiration
2044-12-18

AI Technical Summary

Technical Problem

Existing microbial-based concrete repair materials are insufficient in high alkaline environments, resulting in low mineralization and restoration efficiency, and the mineralized products inside porous particles cannot diffuse, making it impossible to effectively repair concrete defects.

Method used

Hydrophobically modified porous particles are used as carriers to immerse microorganisms, nutrients and calcium sources into the particle pores through vacuum impregnation, and aqueous epoxy is used to seal the particle pores to increase the bond between the particles and the cement matrix, and finally, it is composited with fiber composite mortar to make a concrete quick repair material.

Benefits of technology

It improves the microbial activity and diffusion ability of mineralized products, enhances the bonding strength of concrete interface, and achieves the improvement of crack self-repair and erosion resistance.

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Abstract

The invention discloses a rapid concrete repairing material based on microbial mineralization as well as a preparation method and application of the rapid concrete repairing material. According to the method, hydrophobic modified porous particles are used as a carrier, microbial bacteria, nutrient substances and a calcium source with mineralization behaviors are soaked into pores of the porous particles through vacuum impregnation, the pores of the particles are properly sealed by adopting waterborne epoxy, and then the particles are packaged by using metakaolin and sodium silicate, so that the porous particles are obtained. And finally, compounding with fiber composite mortar to prepare the concrete rapid repairing material. The rapid concrete repairing material has the advantages of strong interface adhesion, environment friendliness, light weight, excellent surface compactness improvement effect, crack self-repairing and the like, and can be used for coating and repairing the defect surface of concrete.
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