In this study, we confirmed the composition of the mineral admixture according to mixing ratio of admixtures on the low-heat cement for mass concrete, evaluated the heat properties of hydration through measurement of microheat of hydration.

This study was evaluated the field applicability of high fluidity concrete for pc sleeper using high volume fly ash.

In this study, it was evaluated the early-strength of mock-up concrete by replacement of the flyash after it was ground by vibration mill and was modified chemically. Also, the early-strength of the specimens for maintaining structure was evaluated on the first, second, third day separately.