Utilization of pretreated fly ash to enhance the chloride binding capacity of cement-based material

Formation of Friedel’s salt (FS) and Kuzel’s salt (KS) can chemically bind chloride in cement-based materials, and in cement-fly ash system, this can be facilitated by the pozzolanic reaction of fly ash (FA), with obvious contribution to the chloride binding capacity. In this study, FA was pretreated with alkali solution in order to depolymerize the surface structure and hasten ions dissolution to accelerate its pozzolanic reaction at the early...