분말형 자극제를 이용한 고로슬래그미분말 혼입 시멘트 모르타르의 조기 압축강도 향상에 관한 실험적 연구

An Experimental Study on the Early Compressive Strength Improvement of Cement Mortar Mixed with Blast Furnace Slag using Powdered Stimulants

Based on previous research and existing literature, this study examines the development of admixture, which increases the early concrete strength (1 and 3 day) by mixing blast furnace slag cement and concrete stimulant. The research on early strength development of concrete is necessary in dealing with the drawbacks of slow early strength concrete on site and to shorten the construction time. The study confirmed that when a high alkaline mortar mixture is mixed with blast furnace slag, the early strength of admixture exceeds that of ordinary portland cement (OPC). The use of calcium chloride ($CaCl_2$) promotes hydration of cement at low temperature and show similar strength as the blast furnace slag admixture. Although calcium chloride seems economically advantageous, it causes steel corrosion and its use in concrete should be further studied in-depth.