含氯再生骨料混凝土中钢筋抗锈蚀性能试验研究

doi:10.11896/cldb.23110219

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Abstract Abandoned concrete in coastal areas were corroded by chloride ions. In order to better recycle the concrete corroded by chloride ions, and explore the corrosion properties of reinforcement in recycled aggregate concrete with chloride salt in original concrete. Here 15 groups of concrete were designed with the types and contents of mineral admixtures and aggregate strengthening as variables. After accelerated corrosion by electrification, the steel reinforcement electrochemical indexes were measured by linear polarization method and electrochemical impedance spectroscopy method of electrochemical work. The results show that the corrosion process of steel reinforcement in chlorine-containing recycled aggregate concrete is faster than that in ordinary recycled concrete. Both nano-SiO₂ solution strengthening recycled aggregate and adding mineral admixtures can commonly improve the corrosion resistance of recycled concrete with chloride salt in original concrete. And by strengthening and modifying, the corrosion resistance of chloride containing recycled aggregate concrete can not lower than that of ordinary recycled aggregate concrete without chlorine.

Key words： recycled aggregate concrete chloride ion corrosion corrosion resistance of reinforcement mineral admixture nano-SiO₂ strengthening

Published: 25 November 2024 Online: 2024-11-22

CLC number:

TU528

Fund:Joint Funds of theNational Natural Science Foundation of China(U1605242),Special Project of Finance Department of Fujian Provincial([2022]No.840),the Natural Science Foundation of Fujian Province(2021J011231),the Department of Education Research Project for Young and Middle-aged Teachers of Fujian Provincial(JAT200368).

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	ZHENG Jianlan
	WANG Yasi
	CHEN Xi
	ZHANG Wangcheng

Cite this article:

ZHENG Jianlan,WANG Yasi,CHEN Xi, et al. Study on Corrosion Resistance of Reinforcement in Recycled Aggregate Concrete with Chloride Salt in Original Concrete[J]. Materials Reports, 2024, 38(22): 23110219-7.

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http://www.mater-rep.com/EN/10.11896/cldb.23110219 OR http://www.mater-rep.com/EN/Y2024/V38/I22/23110219

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