Correlation analysis of heating performance and electrical energy of multi-walled carbon nanotubes cementitious composites at sub-zero temperatures

• Published in: Composite structures Vol. 238; p. 111977
• Main Authors: Lee, Heeyoung, Park, Seonghoon, Cho, Sanghyeon, Chung, Wonseok
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.04.2020
• Subjects: Cementitious; Electrical energy; Field emission scanning electron microscopy (FE-SEM); Heating performance; Multi-walled carbon nanotube (MWCNT); Field emission scanning electron microscopy (FE-SEM); Electrical energy; Heating performance; Cementitious; Multi-walled carbon nanotube (MWCNT)
• ISSN: 0263-8223; 1879-1085
• DOI: 10.1016/j.compstruct.2020.111977

The heating performance and electrical conductivity of cementitious cement can be improved by adding multi-walled carbon nanotubes (MWCNTs). This study investigated the heating performance of MWCNT cementitious composites at room and sub-zero temperatures subjected to various levels of electrical energy. The heating performance of the cementitious composite with 1.0 wt% MWCNTs was 51.4 times that of the composite with 0.1 wt% MWCNTs. At room temperature, the heating performance of MWCNT cementitious composites was proportional to the supply voltage. At −30 °C, the 1.0 wt% MWCNT cementitious composite increased significantly up to 21.7 °C.