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Effects of carbon nanomaterial type and amount on self-sensing capacity of cement paste

Authors
Yoo, Doo-YeolYou, IlhwanZi, GoangseupLee, Seung-Jung
Issue Date
2월-2019
Publisher
ELSEVIER SCI LTD
Keywords
Cement composites; Electrical resistivity; Self-sensing capacity; Carbon nanomaterials; Gauge factor
Citation
MEASUREMENT, v.134, pp.750 - 761
Indexed
SCIE
SCOPUS
Journal Title
MEASUREMENT
Volume
134
Start Page
750
End Page
761
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/67854
DOI
10.1016/j.measurement.2018.11.024
ISSN
0263-2241
Abstract
This study investigates the implications of carbon nanomaterial type and amount on the electrical properties of cement paste. For this, five different nanomaterials, i.e., carbon nanotube (CNT), carbon fiber (CF), graphite nanofiber (GNF), graphene (G), and graphene oxide (GO), and two different volume fractions of 0.5 and 1% were considered. In addition, the self-sensing capacity of the cement composites with nanomaterials was evaluated under cyclic compressive loads. Test results indicate that the conductivity of plain cement paste was improved by adding carbon nanomaterials. In most cases, the conductivity of the composites was reduced by an increase in curing age and a decrease in nanomaterial amount, except for CF. The composites with CNTs exhibited the best self-sensing capacity regardless of volume fraction (v(f)), and the order of self-sensing capacity of the composites at a vf of 1% was CNT > GO approximate to GNF > G. The composites with 0.5 and 1 vol% CFs were determined to be not appropriate for a sensor measuring compressive behaviors. The gauge factor of the composites incorporating 1 vol% CNTs was obtained as 77.2-95.5. (C) 2018 Elsevier Ltd. All rights reserved.
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