“…The expansion of the limestone as the temperature increased varied from 1.00 × 10 -3 to 2.5 × 10 -2 /°C; this was less pronounced than the expansion of the quartz sand, which ranged from 2.4 × 10 -3 to 6.00 × 10 -2 /°C from 100 °C to 300 °C. The rising temperature caused the limestone to grow in size, resulting in the shrinkage of the SAC paste bordering it, due to the imbalance of the thermal stresses between the limestone, quartz, and very dense SAC paste [25,26]. The average mass changes (in grams) of the SACC were 0.119 at 100 °C, 1.302 at 200 °C, and 1.573 at 300 °C; for the SAC paste, they were 0.67 at 100 °C, 2.73 at 200 °C, 3.7 at 300 °C, and 3.71 at 400 °C, relative to the initial mass at 20 °C.…”