Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Durability Properties of High Volume Blast Furnace Slag Concrete for Application in Nuclear Power Plants

고로슬래그 다량치환 콘크리트의 원전 콘크리트 적용을 위한 내구성능 평가

  • Seo, Eun-A (Structural Engineering Research Institute, Korea Institute of Civil engineering and Building technology) ;
  • Lee, Jang-Hwa (Structural Engineering Research Institute, Korea Institute of Civil engineering and Building technology) ;
  • Lee, Ho-Jea (Structural Engineering Research Institute, Korea Institute of Civil engineering and Building technology) ;
  • Kim, Do-Gyeum (Structural Engineering Research Institute, Korea Institute of Civil engineering and Building technology)
  • 서은아 (한국건설기술연구원 구조융합연구소) ;
  • 이장화 (한국건설기술연구원 구조융합연구소) ;
  • 이호재 (한국건설기술연구원 구조융합연구소) ;
  • 김도겸 (한국건설기술연구원 구조융합연구소)
  • Received : 2017.02.27
  • Accepted : 2017.03.15
  • Published : 2017.03.30
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Abstract

This study evaluated the durability of nuclear power plant concrete. The main parameters were the water-to-binder ratio and admixture type. The results revealed that high-volume ground granulated blast-furnace slag(GGBS) concrete had lower initial strength, while the strength reached higher after 28 days. On the other hand, the initial strength of fly ash blended concrete was high, but the long-term strength of the robbery was low. The measured durability of GGBS blended concrete was found to be better than that of the existing concrete mix for use in the construction of nuclear power plants. Especially, the GGBS blended concrete was more durable than the fly ash blended concrete in terms of chloride attack, carbonation resistivity and freezing-thawing durability in low compressive strength. The effects of concrete compressive strength according to gamma rays were minor.

이 연구에서는 고로슬래그 다량 치환 콘크리트의 원전 콘크리트 적용을 위하여 기존 원전 콘크리트와의 내구성능 비교 및 분석을 수행하였다. 연구결과에 따르면 고로슬래그를 50% 치환한 콘크리트의 압축강도는 초기강도는 기존 원전 콘크리트보다 낮지만, 우수한 장기강도를 나타내었다. 반면, 기존 원전 콘크리트의 초기강도는 높았지만, 장기강도 발현율이 낮게 나타났다. 내구성능의 평가결과, 고로슬래그를 50% 치환한 콘크리트의 내구성능은 모든 평가항목에서 플라이애시 20% 치환 콘크리트와 비교하여 동등이상의 성능을 나타내었다. 특히. 저강도에서의 고로슬래그 50% 치환한 콘크리트는 염해 저항성과 탄산화 저항성, 동결융해 저항성의 향상효과가 뚜렷하게 나타났다. 반면, 감마선 조사에 따른 콘크리트 압축강도와 화학성분의 변화는 미미하게 나타났다.

Keywords

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