Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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A Sustainable and Viable Method to Recycle Oyster Shell Waste as an Alternative of Limestone in Limestone Calcined Clay Cement (LC3)

석회석 소성 점토 시멘트(LC3) 내 석회석 대체재로서 굴 패각의 친환경적인 재활용 방안

  • Her, Sung-Wun (Department of Architectural Engineering, Hanyang University) ;
  • Suh, Heong-Won (Department of Architectural Engineering, Hanyang University) ;
  • Park, Jae-Yeon (Department of Architectural Engineering, Hanyang University) ;
  • Im, Su-Min (Department of Architectural Engineering, Hanyang University) ;
  • Bae, Sung-Chul (Department of Architectural Engineering, Hanyang University)
  • 허성원 (한양대학교 건축공학과) ;
  • 서형원 (한양대학교 건축공학과) ;
  • 박재연 (한양대학교 건축공학과) ;
  • 임수민 (한양대학교 건축공학과) ;
  • 배성철 (한양대학교 건축공학과)
  • Received : 2020.05.19
  • Accepted : 2020.06.09
  • Published : 2020.06.30
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Abstract

Over the last decades, great efforts have been devoted to reuse industrial wastes and by-products from various industries as supplementary cementitious materials in order to reduce carbon dioxide(CO2) emission by reducing the use of Portland cement in construction. Oyster shell waste, originating from the fishery industry, is available in huge quantities in certain areas, and is generally discarded or landfilled. In this study, we aimed to reuse oyster shell as an alternative to limestone in limestone calcined clay cement(LC3). The oyster shell calcined clay cement(OC3) paste were produced and were characterized via X-ray diffraction, isothermal calorimetry, compressive strength tests, and thermogravimetry. The results revealed that OC3 pastes exhibited similar strength development and reactivities by pozzolanic reaction with LC3, which implies that oyster shell could be used as a substitute for limestone in LC3.

지난 수십 년 동안 건축 분야에서 발생하는 이산화탄소 배출을 줄이기 위한 방법으로 다른 산업계의 폐기물 및 부산물을 시멘트의 대체재로 접목하기 위해 많은 노력이 있었다. 양식 산업에서 발생하는 굴 패각 폐기물은 특정 지역에서 대량으로 발생하며, 적절한 처리 방법의 부재로 인하여 일반적으로 매립되어지고 있다. 본 연구에서는 시멘트 대체재로 사용되어지고 있는 석회석 소성 점토 시멘트(LC3)의 주원료인 석회석의 대체재로써 굴 패각의 재활용 가능성을 평가하였다. 굴 패각 소성 점토 시멘트(OC3) 페이스트의 화학적·기계적 특성을 규명하기 위해 X-선 회절 분석, 등온 열량 측정, 압축강도 시험 및 열 중량 분석을 실시하였다. 결과적으로, OC3 페이스트는 LC3와 동일한 포졸란 반응에 의해 유사한 강도 발현 및 반응성을 보여주었으며, 이를 통해 굴 패각이 LC3의 주 원료인 석회석의 대체재로써 사용할 수 있다는 것을 확인할 수 있었다.

Keywords

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