In this study, it was developed hybrid fiber reinforced concrete using ground granulated blast furnace slag, the industrial wastes, and recycled aggregate. As a result of experiments on improvement of performances of eco-friendly buildings utilizing recycled resources (recycled coarse aggregates and ground granulated blast furnace slag), the following conclusions are drawn. As hybrid fiber(PVA Fiber+ Steel Fiber) was mixed with the concrete in which the replacement was conducted with recycled coarse aggregates and ground granulated blast furnace slag, the structural performance were increased.

• 하기주(경일대학교 건축공학과 교수, 사)건설기술정책연구원 원장, 공학박사) | Ha, Gee-Joo
• 하재훈(사)건설기술정책연구원 선임연구원, 공학박사) | Ha, Jae-Hoon 교신저자
• 이동렬(사)건설기술정책연구원 연구위원, 공학박사) | Yi, Dong-Ryul