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고강도 고함량 고로슬래그 콘크리트의 강도 발현 특성 및 내구성

김주형;정지용;장승엽;정상화;김성일
Kim, Joo-Hyung;Jeong, Ji-Yong;Jang, Seung-Yup;Jung, Sang-Hwa;Kim, Sung-Il

  • 투고 : 2015.09.20
  • 심사 : 2015.09.27
  • 발행 : 2015.09.30

초록

본 연구에서는 고강도 고함량 고로슬래그 콘크리트의 개발을 위해 고로슬래그 미분말(GGBFS)을 65%까지 치환한 물-결합재비 23%의 고강도 콘크리트를 대상으로 압축강도 발현 특성과 내구성을 분석하였다. 연구 결과에 따르면 GGBFS를 65% 혼입한 고강도 콘크리트의 압축강도는 재령 3일까지는 보통 포틀랜드 시멘트(OPC)만을 사용한 콘크리트보다 낮지만 재령 7일 이후부터 더 높아지는 것으로 나타났으며, 강도의 증가와 함께 공극구조가 더 치밀해짐으로써 염소이온 투과 저항성이 커지고, 이로인해 별도의 공기연행 없이도 우수한 동결융해 저항성을 확보할 수 있으며, 수산화칼슘의 감소에도 불구하고 우수한 탄산화 저항성을 나타냈다. 반면 실리카퓸(SF)을 GGBFS와 함께 혼입하면 GGBFS만 혼입한 경우보다 강도는 낮아지고 염소이온 투과 저항성이 낮아지는 것으로 나타났다. 따라서 향후 고강도 고함량 고로슬래그 콘크리트에서의 SF의 반응에 대한 심층적인 연구가 요망된다.

키워드

고로슬래그 미분말;고강도;고함량;강도;내구성

참고문헌

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피인용 문헌

  1. Structural Capacity of Water Channel Fabricated of Blast Furnace Slag Concrete vol.4, pp.4, 2016, https://doi.org/10.14190/JRCR.2015.3.3.261

과제정보

연구 과제 주관 기관 : 한국철도기술연구원