三维石墨烯-碳纳米管对超高性能混凝土机敏性能的影响

doi:10.11896/cldb.23010135

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Abstract Three-dimensional graphene-carbon nanotubes (Graphene-CNT, GC) were incorporated with ultra-high performance concrete (UHPC) in this work. The effects of GC content, loading amplitude, loading speed, temperature and water content on the resistivity variation pattern of UHPC were analyzed based on the four-electrode method. The results showed that the GC content has little effect on the 28 d compressive strength of UHPC. UHPC resistivity decrease gradually with the increase of GC content, and the resistivity of UHPC with 2.0wt%GC decreased by 55.1% compared with the control group. UHPC resistivity decreased with increasing internal relative water content, and there was a good linear relationship between relative water content and resistance. UHPC resistivity decreased with increasing temperature, and the natural logarithm of resistivity was linearly related to the inverse of the absolute temperature. The amplitude of resistivity change of UHPC increased with the increase of loading amplitude and showed excellent piezoelectric properties and electric conductivity. Moreover, the compressive stress and strain sensitivity coefficients of UHPC specimens with 1.2wt%GC reached 0.2%/MPa and 85.2, respectively.

Key words： three-dimensional graphene-carbon nanotubes UHPC electrical resistivity piezoresistivity

Published: Online: 2024-06-25

CLC number:

TU528.58

Fund:National Natural Science Foundation of China (52379136),Science and Technology Innovation Activity Plan for College Students of Zhejiang Province (Xinmiao Talent Program) (2022R403C092).

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	LIU Jintao
	CUI Jiaowei
	ZHOU Yu
	QIAN Rusheng
	KONG Deyu

Cite this article:

LIU Jintao,CUI Jiaowei,ZHOU Yu, et al. Effect of Three-dimensional Graphene-Carbon Nanotubes on the Smart Performance of Ultra-high Performance Concrete[J]. Materials Reports, 2024, 38(11): 23010135-8.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.23010135 OR http://www.mater-rep.com/EN/Y2024/V38/I11/23010135

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