Mechanism of thermal activation on granular coal gangue and its impact on the performance of cement mortars

Coal gangue (CG) is a kind of solid waste discharged from the process of coal mining and washing without efficient utilization. Motivated by using the CG as supplementary cementitious materials (SCMs) for the partial substitution of cement, the CG was thermally activated via calcining under high temperature and the corresponding mechanism was discussed. The effect of calcination on the microstructure and pozzolanic reactivity of CG as well as...