Effects of Crushed Fine Aggregate and Durability Improvement Agent (DIA) on Blast Furnace Slag-Based Brick

내구성증진용 혼화제(DIA) 및 부순 잔골재의 복합 치환이 순환잔골재를 사용한 고로슬래그 벽돌의 특성에 미치는 영향

This study investigates the effect of crushed fine aggregate and chemical admixture (durability improvement agent, named DIA) on blast furnace slag-based brick. The control brick was made with recycled fine aggregate of 100% and, no cement was used. Test results showed that all specimens developed similar strength, except for the specimen without partial replacement of crushed fine aggregate at 3 days. However, it is interesting to note that this specimen without crushed fine aggregate resulted in the highest strength at 7 days. In addition, the DIA had a major effect on the absorption ratio of brick specimens. For the brick specimens with partial replacement of crushed fine aggregate with 10%, the addition of DIA with only 1% was enough to satisfy the code regulated by KS F 4004.