Construction method of high crack-resistant long-lasting concrete structure

By dividing the concrete structure into sections and using interlayer compensation material consisting of delayed expansion components and internal curing particles, combined with temperature and humidity co-curing and penetrating crystalline protective grout, the problem of differential shrinkage compensation in high-risk crack areas during the hardening and curing process of concrete structures was solved, thereby improving crack resistance and durability.

CN122358677APending Publication Date: 2026-07-10GUANGDONG TOP CONSTR GRP CO LTD
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Patent Information

Application Number
CN202610822407.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-09
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing concrete structures are difficult to compensate for with differentiated shrinkage in high-risk crack areas during hardening and curing. Microcracks and weak penetration channels are easily formed at the interlayer interface. The timing of surface durability protection construction is not well matched with capillary water absorption, resulting in insufficient crack resistance and long-term durability.

Method used

Before the construction of the concrete structure, the main pouring area, the constrained transition area and the surface protection area are divided. Interlayer compensation material containing delayed expansion components and internal curing particles is used. Through temperature and humidity synergistic curing and capillary activation surface protection, combined with a penetrating crystalline protective slurry layer, a continuous construction process is formed.

Benefits of technology

It effectively reduces interlayer microcracks and confinement cracks, improves crack resistance and impermeability, and enhances the long-term durability of concrete structures, especially exhibiting excellent performance in underground and foundation concrete structures with obvious constraints and high durability requirements.

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Abstract

This invention discloses a construction method for a high crack-resistant and long-durability concrete structure, relating to the field of concrete structure construction technology. The method includes dividing the structure into a main pouring zone, a constraint transition zone, and a surface protection zone based on the constraint and exposed surface locations; preparing main concrete containing composite expansion components and crack-resistant fibers, and interlayer compensation material containing delayed expansion components, internal curing particles, and fiber dispersion slurry; continuously pouring the main concrete in layers, and placing the interlayer compensation material between adjacent pouring layers and in the constraint transition zone; adjusting the insulation and moisture retention curing according to the temperature difference between the core and the surface and the surface humidity; constructing a penetrating crystalline protective slurry layer and maintaining moisture retention after the surface reaches a preset capillary water absorption state; improving the crack resistance, impermeability, and long-term durability of the concrete structure by reducing interlayer microcracks and constraint cracks; and solving the problems of shrinkage compensation in high-risk crack areas of existing concrete structures, and the easy formation of microcracks and weak penetration channels at interlayer interfaces.
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