 The use of supplementary cementing materials, SCMs, such as fly ash, can improve the performance of redamix concrete. In this study, the Ulfers examined the effects of mixing time and mixer revolution counts on the characteristics of lab-made pastes and mortars containing 20% and 50% fly ash. The results showed that increased mixing time and mixer revolution counts resulted in improved fresh and hardened characteristics, including time variant ion concentrations, setting time, flow, compressive strength, porosity, and apparent chloride diffusivity coefficient. The Ulfers suggest that fly ash should be adopted in the extended mixing processes of cement systems. This article was authored by Isara Saree Wothanawut, Chinapat Pamwisawas, Chayat and Gamkanawm, and others.