2021 Volume 75 Issue 1 Pages 136-143
In this study, the effects of curing temperature and amount of retarder on setting characteristics, hydration heat generation, hydration products, and compressive strength were examined using mortar mixed in a high temperature environment assuming the hot season. As a result, it was shown that the addition of the retarder broadens the hydration curve and promotes the hydration reaction after the third peak of the hydration curve, and that the addition of the retarder at 38℃ enhances the strength. Similarly, mercury intrusion tests, low-temperature DSC, and SEM observations were carried out using cement paste mixed in a high-temperature environment, and it was clarified that the continuity of macropores was improved by curing at 70℃, and that the pore diameter shifted to the smaller one by increasing the amount of retarder, and that the gel pore was changed by the retarder.
