Effect of Temperatures and Moisture Content on the Fracture Properties of Engineered Cementitious Composites (ECC).

This research will help to improve our understanding of the fracture properties of ECC at low temperatures (long-term low temperatures, freeze-thaw) and evaluate the safety properties of ECC under low-temperature conditions. Three levels of saturation (saturated, semi-saturated, and dry), four target temperatures (20, 0, -20, and -60 °C), and the effect of the coupled of the two on the mode I fracture properties of ECC were investigated. Then, we compared and analyzed the fracture properties of ECC loaded at 20 and -20 °C, after different freeze-thaw cycles (25, 50, 100 cycles), which were compared with saturated specimens without freeze-thaw at the four target temperatures to analyze the differences in low-temperature and freeze-thaw failure mechanisms.