Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Recycling Technology Trend of Waste Concrete Powder for Carbon Neutrality in the Cement Industry

시멘트 산업 탄소중립을 위한 폐콘크리트 미분말의 재활용 기술 동향

  • Sang-Chul, Shin (Eco Friendly Concrete Research Center, Kongju National University) ;
  • Jin-Man, Kim (Department of Architectural Engineering, Kongju National University) ;
  • Geon-Woo, Kim (Department of Architectural Engineering, Kongju National University) ;
  • In-Gyu, Kang (Department of Architectural Engineering, Kongju National University)
  • 신상철 (공주대학교 친환경콘크리트연구소) ;
  • 김진만 (공주대학교 건축공학과 ) ;
  • 김건우 (공주대학교 건축공학과 ) ;
  • 강인규 (공주대학교 건축공학과 )
  • Received : 2022.11.11
  • Accepted : 2022.12.14
  • Published : 2022.12.30
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Abstract

Research on the recycling of waste concrete has been conducted mainly focusing on the production of high-quality recycled ag g reg ate, and as a result, standards and specifications for recycled ag g reg ate have been established. However, in the case of waste concrete powder, although a lot of research on its utilization has been conducted in Korea, an innovative technology leading to commercialization has not yet been announced. Recently, research on technology using waste concrete powder as a raw material for clinker or cement has been actively conducted in major overseas advanced countries. This study investigated the overseas cases with regard to high value-added recycling technology and commercialization trend of waste concrete powder for carbon neutrality in cement and concrete industries. A number of studies have reported that it is essential to completely separate the aggregate and hydrated cement paste fraction for recycling of waste concrete powder. Also in major foreig n countries such as EU and USA, commercialization and standardization of using waste concrete powder as a raw material for clinker or a additive for cement are now in progress beyond the R&D stage. Therefore, Research and standardization for recycling of waste concrete powder should be urgently carried out from the perspective of carbon neutrality in Korea.

폐콘크리트의 재활용에 대한 연구는 주로 고품질 순환골재 생산에 포커스를 맞춰 연구가 진행되어 왔으며, 그 결과 순환골재 국가표준을 제정하는 등 적극적으로 사용할 수 있는 환경이 조성되었다. 하지만 폐콘크리트 미분말의 경우, 그 활용에 대한 연구가 국내에서 많이 수행되었음에도 불구하고 상용화로 이어지는 획기적인 기술은 아직 발표되지 않은 실정이다. 최근 해외 주요 선진국에서는 폐콘크리트 미분말을 클링커나 시멘트의 원료로 사용하는 기술에 대한 연구가 활발히 이루어지고 있다. 이와 같은 배경에서 본 연구에서는 시멘트-콘크리트 산업의 탄소중립을 위한 폐콘크리트 미분말의 고부가가치 재활용 기술 및 상용화 동향에 대한 사례조사를 실시하였다. 폐콘크리트 미분말의 고부가가치 리싸이클을 위해서는 골재와 시멘트 페이스트의 완벽한 성분 분리가 필수적이며, 해외 주요국에서는 연구 개발 단계를 넘어 클링커의 원료 또는 시멘트의 혼합재로 사용하는 것에 대한 상용화 및 표준화가 진행 중이다. 따라서, 국내에서도 탄소중립의 관점에서 폐콘크리트의 재활용을 위한 연구 개발 및 표준화에 대한 논의가 시급하게 이루어져야 할 것이다.

Keywords

Acknowledgement

본 연구는 2022년도 산업통상부의 재원으로 한국산업기술평가관리원-시멘트원료(석회석)대체순환자원기술개발사업의 지원을 받아 수행된 연구임(RS-2022-00155067). 이 연구는 2022년도 산업통상자원부 및 산업기술평가관리원(KEIT) 연구비 지원에 의한 연구임(20020839).

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