氧化石墨烯改性地聚物再生混凝土的抗硫酸溶蚀性能研究

doi:10.11896/cldb.22010212

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Abstract Taking geopolymer recycled concrete as matrix, the concrete was immersed in sulfuric acid solution with pH=1.0 for 48 d, and its apparent damage, compressive strength, mass loss and neutralization depth were used as sulfuric acid resistance performance indexes. The effects of different dosages of graphene oxide (0.01%, 0.03%, 0.05%) on the corrosion resistance of concrete were studied. In addition, the modification effect of graphene oxide was analyzed by SEM, XRD and FTIR. Studies have shown that the incorporation of a small amount of graphene oxide can significantly improve the sulfuric acid resistance of concrete, but the modification effect gradually weakens with the increase of the content. The compressive strength of the modified concrete increased by 56.0%, 17.0% and 6.0%, respectively, and it was still better than that of the unmodified concrete after 48 d of sulfuric acid corrosion. After 48 d, the concrete with 0.05wt% content showed the maximum mass loss and neutralization depth, and the poor interfacial transition zone and more loose corrosion products in the SEM figure, which represented the worst modification effect. Based on the macro performance, XRD and FTIR analysis, it was determined that the geopolymer recycled concrete with 0.01% graphene oxide had the best sulfuric acid corrosion resistance.

Key words： geopolymers recycled concrete graphene oxide sulphuric acid erosion compressive strength

Published: 10 November 2023 Online: 2023-11-10

CLC number:

TU528

Fund:National Natural Science Foundation of China (52008046) and the Graduate Research and Innovation Projects of Jiangsu Province of China (SJCX22_1398).

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	Articles by authors
	LIU Xinyu
	LIU Hui
	WANG Xinjie
	ZHU Pinghua
	CHEN Chunhong
	ZHOU Xinlei

Cite this article:

LIU Xinyu,LIU Hui,WANG Xinjie, et al. Sulfuric Acid Corrosion Resistance of Graphene Oxide Modified Geopolymer Recycled Concrete[J]. Materials Reports, 2023, 37(21): 22010212-6.

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http://www.mater-rep.com/EN/10.11896/cldb.22010212 OR http://www.mater-rep.com/EN/Y2023/V37/I21/22010212

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