Basic and Creepy Characteristics of High Performance Concrete Complexly Using Blast Furnace Slag Powder and Fly ash

고로슬래그 미분말 및 플라이애시를 복합사용한 고성능 콘크리트의 기초 및 크리프 특성

This study analyzed the basic characteristics and the characteristic of drying shrinkage and creep of high performance concrete complexly metathesized by BS and FA and the results are summarized as the followings. Regarding to the compressive strengths according to the passage of aging, OPC was appeared to be larger than B2F1 at the initial aging but B2F1 was appeared to be higher than OPC at aging 28days. Regarding to the changing rate of drying shrinkage according to the passage of aging, both OPC and B2F1 were appeared to be increased and, at aging 60days, B2F1 was appeared to be largely increased by about 42% as -21${\times}$10-6 및 -51${\times}$10-6 as compared to OPC. The transforming rate of creep was appeared to have been largely increased at the initial aging and then be smoothly increased somewhat as the aging was passed. And regardign to the transforming rate of creep after 60 days had been passed, B2F1 was appeared to be largely increased by about 13% as compared to OPC.

본 연구는 BS 및 FA를 복합치환한 고성능 콘크리트의 기초적 특성, 건조수축 및 크리프 특성을 분석하였는데, 그 결과를 요약하면 다음과 같다. 재령경과에 따른 압축강도는 초기재령에서 OPC의 경우 B2F1보다 크게 나타났으나, 재령 28일에서는 B2F1의 경우 OPC에 비해 크게 나타났다. 재령경과에 따른 건조수축변화율은 OPC B2F1 모두 재령이 경과됨에 재령 60일에서는 B2F1가 -21${\times}$10$^{-6}$및 -51${\times}$10$^{-6}$로서 OPC보다 약 42 % 정도 크게 증가하는 것으로 나타났다. 크리프 변형율은 초기재령 에서는 크게 증가하다가 재령이 경과함에 따라 비교적 완만하게 증가하는 것으로 나타났는데, 60일경과 후의 크리프 변형율은 B2F1의 경우 OPC보다 약 13 % 정도 크게 증가하는 것으로 나타났다.