Evaluation of self-sensing performance of UHPC with carbon nanotube

In this study, a material test was conducted to investigate the self-sensing performance of ultra-high performance concrete (UHPC) with carbon nanotubes (CNTs), based on which the correlation between the damage of specimens and the fractional change in resistance (FCR) was analyzed in detail. In addition, small UHPC sensors were fabricated for practical application, and their performance was evaluated based on which gauge factors of the UHPC sensors were derived. The experimental results showed that the sectional shape of the UHPC sensor had an insignificant effect on the self-sensing performance of the sensor and that the electrodes with copper plates were more efficient to estimate the damage than were those with copper wires.