Excitation Effect of Soluble Glass on Composite System with Calcined Coal Gangue and Slag

摘要

By studying alkaline-activated complex systems with coal gangue calcined at 750°C and slag, the results can show that under the action of soluble glass, when the weight fraction of calcined coal gangue was less than 30%, mechanical strength of composite systems may be more than 40 MPa. But when the weight fraction of calcined coal gangue is higher than 60%, the strength of complex systems was decreased faster than that of alkali-activated slag cementitious materials. X-ray diffraction (XRD) method and determination of chemically combined water content were used to study hydration course of alkali-activated cementitious materials. The results can show that the major hydration product was zeolite and the change of chemically combined water content was consistent with the results of strength development.