Properties of Compressive Strength of Mortar Based on High-activated Blast Furnace Slag and Possibility of Concrete Secondary Products

고활성 고로슬래그 미분말 모르타르의 압축강도 발현 특성 및 콘크리트 2차 제품용 결합재 활용 가능성 검토

Replacing a large amount of ground granulated blast furnace slag is limited because early age strength is low due to latent hydraulic property despite excellence of long-term strength. This study aimed to examine produceableness of high-activated ground granulated blast furnace slag using slag by-product from steel process. As experimental variable, the properties of strength development were analyzed by setting fineness and replacement ratio of slag by-product, curing conditions, and W/B. The results of study showed that high-activated ground granulated blast furnace slag using slag by-product as an activator improve the compressive strength of mortar. It is expected to be used as binder for secondary product of concrete considering curing and mixing conditions because high-activated ground granulated blast furnace slag can be hydrated by itself.