Influences of Loading Conditions on Piezoresistive Properties of Graphene Nanoplatelets Reinforced Cement-Based Composites

Abstract

Abstract: In this paper, the effects of loading amplitude (15 MPa, 20 MPa, 25 MPa) and loading rate (100 N/s, 300 N/s, 500 N/s) on the piezoresistive properties of graphene nanoplatelets reinforced cement-based composites (GNPs/CC) were studied under different dosages of graphene nanoplatelets (GNPs). The experimental results show that the piezoresistive properties of graphene nanoplatelets reinforced cement-based composites are similar to that of the blank group when the dosage of graphene nanoplatelets is less than 0.25% (mass fraction, the same below). When the dosage reaches 0.3%, the composite has the highest and the most repeatable resistance variation. When the dosage of graphene nanoplatelets is 0.3%, the resistance variation and strain of the composite rise with the increase of the loading amplitude. When the loading amplitude is no more than 20 MPa, the increase of the resistance variation is similar to that of the strain, the gauge factor of the composite changes little. When the loading amplitude reaches 25 MPa, the increase of the resistance variation is larger than that of the strain. And the gauge factor of the composite increases largely. In addition, the loading rate has no significant effect on the piezoresistive properties of the composite when the dosage of graphene nanoplatelets is 0.3%.

Key words: graphene nanoplatelet, cement-based composite, piezoresistive property, loading amplitude, loading rate

CLC Number:

TU528.043

WEI Lihuang, CHEN Jiamin, XIA Haiting, GUO Rongxin, LIN Zhiwei, SUO Yuxia, WU Yichen. Influences of Loading Conditions on Piezoresistive Properties of Graphene Nanoplatelets Reinforced Cement-Based Composites[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(4): 1072-1078.

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