磺化石墨烯对再生砂超高性能混凝土力学性能和耐久性能的影响

doi:10.11896/cldb.20090345

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Abstract Using recycled sand to produce ultra-high performance concrete (UHPC) deteriorates its mechanical properties and durability. The properties of UHPC produced by recycled sand (RS-UHPC) could be improved by adding graphene sulfonate nanosheets (GSN). The study was aimed to investigate the effects of the GSN on the mechanical properties and durability of RS-UHPC, and the influence of the GSN on the pore structure of RS-UHPC was also studied. It was found that, (1) the porosity of RS-UHPC was reduced by 3.75%—10.24%, due to the addition of GSN; (2) the compressive strength, flexural strength, and elastic modulus of RS-UHPC were increased by 3.24%—14.72%, 5.21%—20.09%, and 3.56%—11.84%, respectively, because of the use of GSN; (3) the freeze-thaw resistance of the RS-UHPC and the resistance of the RS-UHPC to penetration of chloride ions were significantly improved, due to the incorporation of GSN; (4) the optimal content of GSN was 0.06%, considering the effects of GSN on the pore structure, mechanical properties, and durability of RS-UHPC.

Key words： ultra-high performance concrete recycled sand mechanical property durability graphene sulfonate nanosheets pore structure

Published: 10 March 2022 Online: 2022-03-08

CLC number:

TU528.09

Fund:National Natural Science Foundation of China (51808294) and the Natural Science Foundation of the Education Department of Jiangsu (18KJB430017).

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	Articles by authors
	CHU Hongyan
	GAO Li
	QIN Jianjian
	TANG Jinhui
	JIANG Jinyang

Cite this article:

CHU Hongyan,GAO Li,QIN Jianjian, et al. Effects of Graphene Sulfonate Nanosheets on Mechanical Properties and Durability of Ultra-high Performance Concrete Produced by Recycled Sand[J]. Materials Reports, 2022, 36(5): 20090345-5.

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http://www.mater-rep.com/EN/10.11896/cldb.20090345 OR http://www.mater-rep.com/EN/Y2022/V36/I5/20090345

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