한국건설순환자원학회논문집 (Journal of the Korean Recycled Construction Resources Institute)

한국건설순환자원학회 (Korean Recycled Construction Resources Institute)
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동슬래그 및 제강슬래그의 해양 콘크리트용 중량 골재 사용성 평가

Evaluation on Applicability of Copper and Steelmaking Slags for Use of Heavy Weight Aggregates in Marine Concrete Structure

  • 문훈 (부경대학교 건축공학과) ;
  • 장보길 (부경대학교 건축공학과) ;
  • 김지현 (부경대학교 건축공학과) ;
  • 정철우 (부경대학교 건축공학과)
  • Moon, Hoon (Department of Architectural Engineering, Pukyong University) ;
  • Jang, Bo-Kil (Department of Architectural Engineering, Pukyong University) ;
  • Kim, Ji-Hyun (Department of Architectural Engineering, Pukyong University) ;
  • Chung, Chul-Woo (Department of Architectural Engineering, Pukyong University)
  • 투고 : 2017.06.20
  • 심사 : 2017.09.05
  • 발행 : 2017.12.30
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초록

중량 콘크리트는 고파랑에 대한 저항성 상승을 위해 해양 구조물에 사용될 수 있다. 그러나 중량 콘크리트를 제조하기 위해 필수적인 재료인 중량 골재는 대량 공급이 어려우며, 고가이므로 사용이 제한되고 있다. 따라서 본 연구에서는 산업부산물인 동슬래그 및 제강슬래그의 해양 콘크리트용 중량 골재로써 활용성을 평가하였다. 실험 결과 동슬래그는 수침팽창 및 알칼리 실리카반응성이 안정적인 것으로 나타나 해양 콘크리트용 중량 골재로서 활용이 가능할 것으로 판단된다. 그러나 제강슬래그는 수침팽창 및 ASTM C 1260 시험에서 높은 팽창율을 보였다. 또한 콘크리트 내 제강슬래그가 위치한 곳에서 염화물 이온이 깊게 침투한 것이 발견되었다. 따라서 제강슬래그는 해양 콘크리트 구조물의 골재로서는 부적합한 것으로 사료된다.

Heavy weight concrete can be used in marine concrete structure to improve resistance against high wave energy. However, heavy weight aggregate, which is an indispensable material for heavy weight concrete, is difficult to be supplied in large quantities because its use is limited due to its high cost. In this work, the applicability of heavy weight by-products, copper and 3 month aged steelmaking slags, were evaluated as sources of heavy weight aggregate for marine concrete structures. Experimental results showed that copper slag was found to be a stable material for marine concrete structure. However, 3 month aged steelmaking slag showed significant expansion by $80^{\circ}$ water immersion test and ASTM C 1260 test. In addition, depth of chloride ion penetration in concrete was higher at which steelmaking slags were located. It was associated with porosity of steelmaking slag, and for this reason, steelmaking slag was not found to be suitable for marine concrete structure.

키워드

참고문헌

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