Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Hydration Reaction and Strength Characteristics of Cement Mortar Mixed with Spent Coffee Ground

커피찌꺼기를 혼합한 시멘트 모르타르의 수화반응 및 강도 특성

  • Choi, Yoon-Suk (Construction Technology Research Center, Korea Conformity Laboratories) ;
  • Lim, Gwi-Hwan (Construction Technology Research Center, Korea Conformity Laboratories) ;
  • Suh, Jung-Il (Construction Technology Research Center, Korea Conformity Laboratories) ;
  • Kim, Sung-Bae (Technology Research Institute, J1 Industries) ;
  • Park, Byoungsun (Department of Environment Engineering, Korea University)
  • 최윤석 ((재)한국건설생활환경시험연구원 건설기술연구센터) ;
  • 임귀환 ((재)한국건설생활환경시험연구원 건설기술연구센터) ;
  • 서정일 ((재)한국건설생활환경시험연구원 건설기술연구센터) ;
  • 김성배 ((주)제이원산업 기술연구소) ;
  • 박병선 (고려대학교 환경시스템공학과)
  • Received : 2021.11.24
  • Accepted : 2022.01.07
  • Published : 2022.03.30
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Abstract

In this study, the hydration reaction and strength characteristic of cement mortar with spent coffee ground(SCG) was investigated. As a result of the study, it was found that as the firing temperature of the SCG increased, the mass loss due to the combustion of organic matter increased, but the density increased. In addition, when the SCG were mixed, SCG interfered with the hydration reaction and the compressive strength was significantly lowered. On the other hand, the coffee grounds ash(SCG_Ash) calcined at 800 ℃ showed a hydration reaction and a compressive strength equivalent to or higher than that of OPC mortar.

이 연구에서는 매년 대량으로 발생하는 커피찌꺼기를 건설소재로 재활용하기 위해 커피찌꺼기와 커피찌꺼기 애시를 혼입한 시멘트 모르타르의 수화반응성을 검토하고 강도 특성을 조사하였다. 연구 결과, 커피찌꺼기의 소성온도가 높아질수록 유기물의 연소로 인한 질량 손실은 커졌으나 밀도는 증가하는 것으로 나타났다. 또한 커피찌꺼기를 혼입했을 때는 시멘트 수화반응성이 저조하여 압축강도가 현저히 낮아졌다. 반면, 800 ℃에서 소성시킨 커피찌꺼기 애시는 수화반응이 원활하였으며, 압축강도는 OPC 모르타르와 동등한 수준으로 나타났다.

Keywords

Acknowledgement

본 연구는 국토교통부/국토교통과학기술진흥원 국토교통기술촉진연구사업(21CTAP-C163676-01)의 지원으로 수행되었습니다.

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