Experimental study of the electrical resistance of graphene oxide-reinforced cement-based composites with notch or rebar. (1st July 2022)

• Record Type: Journal Article
• Authors: Hu, Yan-Gao; Awol, Jemal Fahmi; Chen, S.; Jiang, J.N.; Pu, X.; Jia, Xingwen; Xu, X.Q.
• Is Part Of: Journal of building engineering. Volume 51(2022)
• Publication Date: 2022-07-01
• Subjects: Graphene oxide -- Cement -- Piezoresistivity -- Notch -- Sensor; Building -- Periodicals; 690.05
• DOI: 10.1016/j.jobe.2022.104331
• Languages: English
• ISSNs: 2352-7102

Abstract

Abstract: The effects of graphene oxide (GO), notch depth, rebar and load on the resistivity of cement paste and mortar were investigated. The electrical conductivity of GO/cement reaches its largest value when the GO content is 0.03%, which is about 50% higher than that of the composite without GO. The resistivity of the GO/cement changes obviously with the load increasing from 0 to 40 kN. The gauge factor for compressive loading ranges from about 26 to 73 for different GO contents. The resistivity variation with the notch depth in GO/cement is much greater than that in the GO/mortar reinforced by rebars. The findings of this work could contribute to further research on the design of self-sensing concrete in structural health monitoring. Highlights: The electrical conductivity of cement paste with GO and notch was obtained. The 0.03% GO content is a viable choice for enhancing piezoresistivity of GO/cement. The resistivity of GO/cement is very sensitive to notch depths.