Marine work concrete resistant to chlorine salt erosion and preparation method thereof

By optimizing the composition and proportion of marine concrete, and adding modifiers and nanomaterials, a dense structure is formed, which solves the problem of insufficient corrosion resistance of marine concrete in chloride salt environments. It achieves efficient chloride ion curing and improved durability, making it suitable for marine engineering and saline soil areas.

CN121554239APending Publication Date: 2026-02-24WANJIANG INST OF TECH +1
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Patent Information

Application Number
CN202511750797.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-26
Publication Date
2026-02-24

AI Technical Summary

Technical Problem

Existing marine concrete has insufficient resistance to corrosion in chloride-salt environments, its durability needs to be improved, and existing technologies are either costly or complex to construct, making them difficult to apply widely.

Method used

By optimizing the composition and proportion of marine concrete, and adding modifiers and nanomaterials, a dual chloride-fixing system of chemical curing and physical adsorption is formed. Utilizing components such as hexacalcium aluminoferrite, metacalcite, tobermorite, and nano-attapulgite, a dense structure is rapidly formed to block chloride ion penetration channels. Furthermore, the hydration reaction is accelerated by nano-calcite and nano-hydrated calcium silicate, thereby enhancing the resistance to chloride ion penetration.

Benefits of technology

It significantly improves the chloride ion penetration resistance of concrete, extends its service life, reduces production costs, is suitable for large-scale engineering applications, and has both environmental and economic benefits.

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Abstract

The invention discloses marine concrete resistant to chlorine salt erosion and a preparation method thereof, and belongs to the technical field of building materials. The marine concrete is prepared from the following components in parts by mass: 280 to 350 parts of cementing material, 1100 to 1200 parts of aggregate, 150 to 180 parts of mixing water and 2.5 to 4.0 parts of high-efficiency water reducing agent, and the cementing material is prepared from 210 to 270 parts of ordinary Portland cement, 50 to 70 parts of superfine slag powder and 10 to 20 parts of modifier on the basis of the cementing material; on the basis of the modifier, the modifier is prepared from 30 to 45 parts of hexacalcium aluminoferrite, 25 to 35 parts of metaettringite, 20 to 35 parts of tobermorite, 3 to 6 parts of nano attapulgite and 2 to 4 parts of a nano composite material. The components can accelerate the early hydration of cement and the volcanic ash reaction process in the concrete hardening process, so that the concrete can form a compact microstructure in the curing period and cooperate with the curing effect of a hydration product on chloride ions, thereby remarkably improving the chloride ion penetration resistance of the concrete, prolonging the service life of the structure and improving the concrete quality. The method is suitable for port engineering, maritime work structures and buildings in salinized soil areas.
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