Abstract
Ye’elimite is the main constituent of calcium sulfoaluminate (CSA) cement and one of the major constituents of belite sulfoaluminate or belite sulfoaluminate ferrite cements. The main objective of this work is to describe precisely the formation mechanisms of ye’elimite by solid-state reaction. Mineralogical composition development was monitored using XRD analysis, while microstructural monitoring was conducted using BSE-SEM coupled to EDS analysis. The results show that CaAl2O4 and CaAl2O7 are the main intermediate products during ye’elimite formation. At the microstructural scale, ye’elimite forms on calcium aluminate phases. Finally, Avrami’s model was suggested to discuss the ye’elimite formation rate according to sintering temperature and duration.
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