Properties of Low Heat Concrete Using Blast Furnace Slag Powder and Gypsum

고로슬래그 미분말과 석고를 사용한 저발열 콘크리트의 특성

This study is performed to properties of low heat concrete using blast furnace slag powder and gypsum. The test result shows that the air content is in the range of $4.1%{\sim}5.1%$, the unit weight is in the range of $2,306kg/m^3{\sim}2,334kg/m^3$. The compressive strength of concrete mixed blast furnace slag(BFS) low than ordinary portland cement(OPC) at the curing age of 7days, but it is high or same at the curing age of 28days. And the natural gypsum shows superior compressive strength than the chemical gypsum.