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

摘要

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 degrees C, the 1.0 wt% MWCNT cementitious composite increased significantly up to 21.7 degrees C.