Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Effect of Ground Granulated Blast-Furnace Slag on Life-Cycle Environmental Impact of Concrete

고로슬래그가 콘크리트의 전 과정 환경영향에 미치는 효과

  • Yang, Keun-Hyeok (Dept. of Plant.Architectural Engineering, Kyonggi University) ;
  • Seo, Eun-A (Dept. of Architectural Engineering, Kyonggi University Graduate School) ;
  • Jung, Yeon-Back (Dept. of Architectural Engineering, Kyonggi University Graduate School) ;
  • Tae, Sung-Ho (School of Architecture & Architectural Engineering, Hanyang University)
  • 양근혁 (경기대학교 플랜트.건축공학과) ;
  • 서은아 (경기대학교 건축공학과) ;
  • 정연백 (경기대학교 건축공학과) ;
  • 태성호 (한양대학교 건축학부)
  • Received : 2013.05.23
  • Accepted : 2013.09.03
  • Published : 2014.02.28
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Abstract

To quantitatively evaluate the influence of ground granulated blast-furnace slag (GGBS) as a supplementary cementitious material on the life-cycle environmental impact of concrete, a comprehensive database including 3395 laboratory mixes and 1263 plant mixes was analyzed. The life-cycle assesment studied for the environmental impact of concrete can be summarized as follows: 1) the system boundary considered was from cradle to pre-construction; 2) Korea life-cycle inventories were primarily used to assess the environmental loads in each phase of materials, transportation and production of concrete; and 3) the environmental loads were quantitatively converted into environmental impact indicators through categorization, characterization, normalization and weighting process. The life-cycle environmental impacts of concrete could be classified into three categories including global warming, photochemical oxidant creation and abiotic resource depletion. Furthermore, these environmental impacts of concrete was significantly governed by the unit content of ordinary portland cement (OPC) and decreased with the increase of the replacement level of GGBS. As a result, simple equations to assess the environmental impact indicators could be formulated as a function of the unit content of binder and replacement level of GGBS.

혼화재로서 고로슬래그가 콘크리트의 전과정 환경영향에 미치는 효과를 정량적으로 평가하기 위하여, 3395개의 실내 배합 및 1263개의 레미콘 배합을 분석하였다. 콘크리트의 환경영향을 평가하기 위한 전 과정 평가 방법을 요약하면, 1) 고려된 시스템 경계는 요람에서 시공 전단계까지이며, 2) 재료, 운송 및 콘크리트 생산에서의 환경부하 평가는 국가 생애주기 데이터목록을 주로 기반으로 하였으며, 3) 환경부하는 분류화, 특성화, 정규화 및 가중치 단계를 거쳐 정량적인 환경영향 지표로 환산되었다. 콘크리트 전과정 환경영향은 주로 지구 온난화, 광화학 산화생성물 및 무생물 자원고갈의 세 범주로 분류될 수 있었다. 또한, 콘크리트의 환경영향 지표들은 주로 보통 포틀랜드 시멘트의 양에 의해 결정되었으며, 고로슬래그 치환율의 증가와 함께 감소하였다. 이를 고려하여, 콘크리트의 환경영향 지표들은 단위 결합재 양 및 고로슬래그 치환율의 함수로 간단하게 모델링 될 수 있었다.

Keywords

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