氧化石墨烯增强地聚物抗硫酸盐侵蚀性能研究

doi:10.11896/cldb.22030196

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Abstract This work aims to investigate the effect of graphene oxide (GO) on the sulfate attack of geopolymers. Geopolymers were prepared from metakaolin (MK) and graphene oxide (GO) by alkali activation. Mechanical property and microstructure of the GO-reinforced geopolymers after sulfate attack were analyzed by using compressive strength test, scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), and infrared spectroscopy analysis (FTIR) to evaluate its durability. The results show that GO improves compressive strength. The sample with 0.1wt% of GO exhibits the highest compressive strength, which reaches 73.07 MPa at 7 d of sulfate exposure. GO increases the compactness of geopolymers, effectively reduces the ingress of harmful substances, and improves early-age sulfate attack resistance. The compressive strength of the sample with 7—14 d of sulfate exposure decreases by only 5.5%. GO accelerates geopolymerization process and hydration rate, and promotes nucleation crystallization of albite and flusston in geopolymer gel.

Key words： geopolymer metakaolin (MK) graphene oxide (GO) sulfate attack microstructure

Published: Online: 2023-07-10

CLC number:

TB332

Fund:Key Research and Development Program of Hubei Province (2020BAB065), and Key Research and Development Program of Jiangxi Province (20201BBG71011).

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	Articles by authors
	FAN Jinyuan
	LI Maosen
	DUAN Ping
	CHEN Wei
	ZHANG Zuhua

Cite this article:

FAN Jinyuan,LI Maosen,DUAN Ping, et al. Sulfate Attack Resistance of Graphene Oxide Reinforced Geopolymer[J]. Materials Reports, 2023, 37(13): 22030196-5.

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http://www.mater-rep.com/EN/10.11896/cldb.22030196 OR http://www.mater-rep.com/EN/Y2023/V37/I13/22030196

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