Repair methods for concrete structures

A method using a primer and layered laminate structure with specific compositions and layers addresses adhesion and water vapor permeability issues in concrete repairs, ensuring strong adhesion and permeability.

JP2026093206APending Publication Date: 2026-06-08SEKISUI CHEMICAL CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
SEKISUI CHEMICAL CO LTD
Filing Date
2024-11-27
Publication Date
2026-06-08

AI Technical Summary

Technical Problem

Existing methods for repairing concrete structures face issues with adhesion due to moisture absorption by the concrete surface, leading to insufficient hardening of repair materials, and there is a need to ensure both sufficient adhesion and water vapor permeability.

Method used

A method involving a coating step with a primer containing a first curable composition that is liquid at 40°C, has a flash point, and is water-soluble, followed by a bonding step with a repair material impregnated with a second curable composition, and a curing step to form a laminate structure with specific layers to enhance adhesion and water vapor permeability.

Benefits of technology

The method achieves strong adhesion of the repair materials to concrete structures while maintaining high water vapor permeability, preventing peeling and ensuring structural integrity.

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Abstract

To provide a method for repairing concrete structures that can improve the adhesion of repair materials to the surface of concrete structures and has high water vapor permeability. [Solution] The method for repairing concrete structures comprises steps S20, S40, and S50. Step S20 involves applying a first curable composition containing a material that is liquid at 40°C, has a flash point, and is water-soluble, and a primer containing water to the surface of the concrete to be repaired. Step S40 involves applying or impregnating a laminate with the second curable composition to the primer-coated surface of the concrete after step S20, and attaching the repair material. Step S50 involves curing the primer and curable composition after step S40.
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Citation Information

Patent Citations

  • Repair base material of concrete construction

    JP2017128908A

  • Repair material of concrete structure and repair method of concrete structure

    JP2017186825A

  • Repair method of concrete structure

    JP2022081262A