This study examined the setting time of Free-cement concrete and Ordinary Portland Cement(OPC). Alkali Activators(NaOH, KOH, CaOH2) were mixed when free-cement concrete was cast. Five different concentration levels of Alkali activator was used, ranging from 0.5%, 1.0%, 1.5%, 2.0%, and 3.0% by weight of binder.