ABSTRACT
The self-sensing cementitious material Containing Carbon Nanotubes (CNTs) are recently developed for long-term structural health monitoring. This paper investigated the effect of temperature and fatigue on the sensing capacity of cement paste containing CNTs. The specimens were tested at 5, 10, 20, 30, 40, and 50°C. The results show that the electrical resistance decreased as temperature increased. However, fractional change in resistivity was much higher at high temperature and had a strong linear relationship with temperature. When specimen was under fatigue loading, both the electrical resistance and piezoresistivity increased with the number of loading cycles due to formation of microscopic cracks.
