ABSTRACT
In this study, blast furnace slag powder was utilized to reduce the amount of cement in the production of recycled grouting materials. Silica phosphate-based hardeners were used as an alternative to sodium silicate. The delayed-setting grouting material demonstrated performance comparable to the rapid-setting counterpart, with the exception of gel time. Additionally, due to the higher content of ground granulated blast-furnace slag, it exhibited superior resistance to chloride ion penetration. These findings suggest that by adjusting the composition of the recycled binder, the gelation time of the grout can be modified, enabling injection construction to be customized based on specific construction methods and site conditions.
