Electrical Properties of Strain-Hardening Cement Composite (SHCC) with Multi-Walled Carbon Nanotubes Exposed to High temperature up to 900 °C

Abstract Cement-based sensors mixed with carbon nanotube (CNTs) for structural health monitoring were studied to detect changes in electrical resistance under the influence of temperature, pressure, and mass. Strain-hardening concrete composite CNT was heated 900 °C analyze characteristics at high temperatures. The temperature measured using a thermocouple an LCR meter during heating cooling processes. trend changed between 300 400 process, after which change rate respect decreased. At 700 or higher, became larger as initial increases. In when dropped below °C, rapid observed, began drop sharply 500 600 become negative resistance. Following this, self-sensing ability decreased owing temperature. Multi-walled nanotubes could not be distinguished by scanning electron microscope imaging heating.