Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Design of Supplementary Cementitious Materials and Unit Content of Binder for Reducing CO2 Emission of Concrete

콘크리트 CO2 저감을 고려한 혼화재 및 단위 결합재 양의 설계

  • Yang, Keun-Hyeok (Dept. of PlantArchitectural Engineering, Kyonggi University) ;
  • Moon, Jae-Heum (SOC Research Institute, Korea Institute of Construction Technology)
  • 양근혁 (경기대학교 플랜트건축공학과) ;
  • 문재흠 (한국건설기술연구원 SOC성능연구소 인프라구조연구실)
  • Received : 2012.05.15
  • Accepted : 2012.07.05
  • Published : 2012.10.31
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Abstract

The present study assessed the $CO_2$ emissions of concrete according to the type and replacement ratio of supplementary cementitious materials (SCM) and concrete compressive strength using a comprehensive database including 2464 cement concrete specimens and 776 cement concrete mixes with different SCMs. The system studied in $CO_2$ assessment of concrete based on Korean lifecycle inventory was from cradle to pre-construction, which includes consistent materials, transportation and production phases. As the performance efficiency indicators, binder and $CO_2$ intensities were analyzed, and simple equations to evaluate the amount of $CO_2$ emission of concrete were then formulated as a function of concrete compressive strength and the replacement ratio of each SCM. Hence, the proposed equations are expected to be practical and useful as a guideline to determine the type and replacement ratio of SCM and unit content of binder in concrete mix design that can satisfy the target compressive strength and $CO_2$ reduction percentage relative to cement concrete.

이 연구에서는 2464개의 시멘트 콘크리트 배합과 776개의 혼화재가 치환된 혼합 시멘트 콘크리트 배합을 포함하는 실험 데이터베이스를 이용하여 콘크리트 압축강도 및 혼화재 치환율에 따른 콘크리트 $CO_2$ 배출량을 평가하였다. 국내 생애주기 데이터 목록에 기반한 콘크리트 $CO_2$ 평가에서 고려된 시스템은 요람에서 현장 콘크리트 타설 전까지로서 구성재료, 운반 및 생산단계를 포함하고 있다. 콘크리트의 성능 효율성 지표로서 결합재 지수와 $CO_2$ 지수가 분석되었으며, 콘크리트 $CO_2$ 배출량을 평가하기 위한 단순 식이 각 혼화재의 치환비 및 콘크리트 압축강도의 함수로서 제시되었다. 따라서 이 제안된 모델은 목표 압축강도 및 목표 시멘트 콘크리트 대비 $CO_2$ 배출 저감율을 만족하는 콘크리트 배합설계를 위하여 단위 결합재 양 및 혼화재 종류와 치환비를 결정하는 데 가이드 라인으로서 유용하게 이용될 수 있을 것으로 기대된다.

Keywords

References

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