Steel slag-loaded zinc oxide corrosion-resistant geopolymer and preparation method thereof

By plasma-modifying steel slag particles and forming a multi-level interface layer with nano-ZnO particles, the problem of insufficient corrosion resistance of geopolymers in corrosive environments was solved, achieving efficient dispersion and interface enhancement of the material, thereby improving corrosion resistance and mechanical properties.

CN121361976APending Publication Date: 2026-01-20CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP CO LTD
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Patent Information

Application Number
CN202511468745.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-15
Publication Date
2026-01-20

AI Technical Summary

Technical Problem

Existing geopolymers have insufficient long-term corrosion resistance in chloride salt or other corrosive environments. Zinc oxide particles are prone to agglomeration and have poor dispersibility, resulting in a decline in the mechanical properties and structural stability of the material, as well as insufficient adaptability to construction.

Method used

By plasma-modifying steel slag particles to increase their surface activity, and then forming a multi-level interface layer with nano-ZnO particles through a silane coupling agent, a protective layer is generated together with steel slag and ZnO, achieving efficient dispersion of nanoparticles and enhanced interfacial chemistry.

Benefits of technology

It significantly improves the corrosion resistance and mechanical properties of geopolymers in chloride-eroded environments, reduces the chloride ion diffusion rate, forms a sustainable protective barrier, and enhances the long-term stability and construction adaptability of the material.

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Abstract

The invention provides a preparation method of a corrosion-resistant geopolymer with zinc oxide loaded on steel slag. The preparation method comprises the following steps: grinding steel slag particles, and carrying out plasma modification to obtain modified steel slag micro powder; ultrasonically dispersing ZnO particles into deionized water to obtain a ZnO particle suspension; absolute ethyl alcohol and deionized water are mixed, a silane coupling agent is added, and a prehydrolysis solution is obtained after stirring; adding the modified steel slag micro powder into the pre-hydrolysis solution, adding the ZnO particle suspension into the pre-hydrolysis solution, and performing stirring, suction filtration, washing and drying to obtain composite particles; adding the composite particles into a geopolymer precursor, adding an alkali activator into the geopolymer precursor, uniformly mixing to obtain geopolymer slurry, and then casting and curing to obtain the corrosion-resistant geopolymer. The steel slag is subjected to plasma modification treatment by the steel slag-loaded zinc oxide corrosion-resistant geopolymer, so that the surface activity of the steel slag is improved, and the binding rate of the steel slag and a silane coupling agent is increased.
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