2022 Volume 76 Issue 1 Pages 342-348
ABSTRACT：Fly ash, a by-product of coal-fired power plants, has been desired to be commonly utilized as supplementary cementitious material in the concrete industry. However, fly ash is not widely used as a mineral admixture because the concrete using fly ash has lower initial strength. While there are many studies on the reaction of fly ash in concrete cured at high temperature to obtain the high initial strength, few studies comprehensively consider both the strength and the reaction of fly ash. In this study, the effect of curing temperature on the cementing efficiency factor was investigated considering the degree of fly ash reaction as well as degree of alite （C3S） and belite （C2S） reaction. As a result, the most appropriate datum temperature for the evaluation of fly ash reaction degree with cumulative temperature is 8.5℃ in this study. Also, the cementing efficiency factor can be evaluated by using that datum temperature for the fly ash used in this study.
