Concrete anti-cracking and anti-seepage material and preparation method thereof

By introducing layered magnesium-aluminum composite materials doped with polyurea and modified polyurea into concrete, a three-dimensional interlocking structure is formed, which solves the problem of easy cracking of concrete, improves the crack resistance and impermeability, and has self-repairing ability, thereby enhancing the durability of the structure.

CN120590128BActive Publication Date: 2025-09-30ZHONG DA (TIAN JIN) JIAN SHE JI TUAN YOU XIAN GONG SI
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Patent Information

Application Number
CN202511101769.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-08-07
Publication Date
2025-09-30
Estimated Expiration
2045-08-07

AI Technical Summary

Technical Problem

Existing concrete materials are prone to cracking during service, resulting in reduced structural durability, and the crack resistance of existing polyurea and concrete mixed systems still has room for improvement.

Method used

Layered magnesium-aluminum composite materials are doped with polyurea to form a three-dimensional layered interlocking structure, and modified polyurea is introduced. The surface is sealed by Schiff base gel and calcium lactate. Combined with the self-healing effect of modified polyurea, the compatibility and bonding strength between the polyurea component and other components are improved, thereby inhibiting crack propagation.

Benefits of technology

It significantly improves the crack resistance and impermeability of concrete, can effectively fill cracks and prevent leakage, and has self-repair capabilities during service, enhancing the toughness and corrosion resistance of the structure.

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Abstract

This application relates to the technical field of concrete anti-seepage materials. Specifically, it provides a concrete anti-cracking and anti-seepage material and a preparation method thereof. The concrete anti-cracking and anti-seepage material comprises the following raw materials in parts by weight: 80-120 parts cement, 20-30 parts silica fume, 5-10 parts polyurea composition, 10-15 parts fly ash, 5-10 parts bentonite, 2-3 parts silane coupling agent, and 1.5-2 parts water reducer. The polyurea composition includes polyurea@LDHs, which are prepared by doping polyurea with a layered magnesium-aluminum composite material. The concrete anti-cracking and anti-seepage material prepared in this application has the advantages of crack resistance and good anti-seepage performance.
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