Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Study on the Utilization of Waste Plastic in the Korea Cement Industry and the Revision of KS Standards for Increasing Fuel Substitution Rates

국내 시멘트 산업의 폐합성수지 활용 현황 및 연료대체율 증가에 따른 KS제도 개선 필요성 연구

  • Jang-Hun Jo (R&D department, Korea cement advanced-materials research association) ;
  • Sung-Il Yun (R&D department, Korea cement advanced-materials research association) ;
  • Se-Jin Lee (R&D department, Korea cement advanced-materials research association) ;
  • Jae-Ho Choi (R&D department, Korea cement advanced-materials research association) ;
  • Eui-Chul Kim (Office of University-Industry Cooperation, Korea cement advanced-materials research association)
  • 조장훈 (한국시멘트신소재연구조합 연구개발실) ;
  • 윤성일 (한국시멘트신소재연구조합 연구개발실) ;
  • 이세진 (한국시멘트신소재연구조합 연구개발실) ;
  • 최재호 (한국시멘트신소재연구조합 연구개발실) ;
  • 김의철 (한국시멘트신소재연구조합 산학협력본부)
  • Received : 2024.08.13
  • Accepted : 2024.09.12
  • Published : 2024.09.30
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Abstract

In this study, the status of fuel substitution in Korea cement industry and the chloride contents of cement products were investigated to consider the revision of KS F 4009. The annual average chloride contents of cement products were 130~485 ppm, and the chloride in cement products was calculated to be 1,033 ppm with increasing the use of waste plastic. As a result from the increase of chloride in cement, the chloride contents in concrete will exceed 0.3 kg/m3, if more than 250 kg/m3 of cement is used. In many countries, the limit of chloride in concrete is decided by the environment where concrete is used and the quantity of cement used in concrete. Considering the inevitable increase in the chloride in cement and concrete due to the increased use of waste plastic and the trends in overseas standards for chloride of concrete, it is thought that the revision of KS F 4009 should be reviewed.

본 연구는 국내 시멘트 산업의 폐합성수지 활용 현황과 대체연료 사용량 증가에 따른 시멘트 내 염화물 함량에 대해 조사하였으며, 국내외 시멘트 및 콘크리트 내 염화물 기준 조사를 통해 KS제도 개선 필요성에 대해 고찰하였다. 2016~2023년에 조사된 각사별 연평균 염화물 함량 중 최대값은 485 ppm이었으며, 폐합성수지 사용량 증가 시 1,033 ppm까지 증가할 것으로 계산되었다. 국내 콘크리트 염화물 관리 기준은 총량제로서 0.3 kg/m3 로 제한하고 있지만, 계산된 시멘트 염화물량(1,033 ppm)을 기준으로 하였을때 단위시멘트량이 290 kg/m3 이상이 되는 경우 현행 KS 염화물 기준을 만족하기 어려운 것으로 나타났다. 해외 다수의 국가에서는 시멘트 투입량에 따라 콘크리트 염화물량을 제한하는 종량제를 채택하고 있는 상황에서, 한국 또한 시멘트 산업의 탄소중립 달성을 위해서 연구수행을 통한 합리적 염화물 기준도출과 이해관계자 공감대 형성을 통해 종량제 도입 추진이 검토되어야 할 것으로 생각된다.

Keywords

Acknowledgement

본 연구는 2024년 산업통상자원부 연구비 지원에 의해 수행되었습니다(RS-2023-00261230).

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