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Probability-based Cost Analysis for Recycling Secondary Products from Construction Waste

건설폐기물 재활용 2차 제품에 대한 확률모델 기반 비용분석

  • Kwon, Kihyon (Department of Infrastructure Safety Research at KICT) ;
  • Kim, Do-Gyeum (Department of Infrastructure Safety Research at KICT) ;
  • Lee, Ho-Jae (Sustainable Infrastructure Research Center at KICT) ;
  • Seo, Eun-Ah (Department of Infrastructure Safety Research at KICT)
  • 권기현 (한국건설기술연구원 인프라안전연구본부) ;
  • 김도겸 (한국건설기술연구원 인프라안전연구본부) ;
  • 이호재 (한국건설기술연구원 노후인프라센터) ;
  • 서은아 (한국건설기술연구원 인프라안전연구본부)
  • Received : 2020.05.20
  • Accepted : 2020.06.24
  • Published : 2020.06.30

Abstract

Under consideration of construction waste recycling, candidate secondary products applicable for the civil and construction areas can be reliably employed based on the recycling cost analysis. For the validation purpose, probability-based cost analyses were performed to estimate recycling cost profit considering uncertainties. When recycling construction wastes, the costs at each stage are fully dependent on target products to be adopted. To achieve commercialization of each product, its quality has to be improved with economic efficiency through accurate evaluation of input costs. Based on the probabilistic recycling cost analysis, the cost benefit for target products was estimated with waste classification cost, transportation cost to recycling treatment facilities and production cost. All necessary information on the cost analysis were collected from literature, disclosure, and existing recycling companies. In addition, a cost difference between recycled and non-recycled events was made. As a result, a probability-based recycling cost estimate for candidate secondary products was herein presented.

본 연구에서는 토목건설 분야에서 활용 가능한 폐기물 재활용 2차 제품 후보군 각각에 대한 비용분석 결과를 제시하였다. 각각의 비용 항목에 내재된 불확실성을 고려하여 확률모델 기반 비용 분석을 수행하였으며, 2차 제품 제작에 의해 발생하는 이익 비용을 제시하였다. 폐기물 재활용 시 각각의 공정별 투입 비용 발생은 불가피하며, 이는 2차 제품 대상 후보군별로 달라지는데 제품별 실용화에서 경제성 확보를 위해서는 제품 품질향상 뿐만 아니라 투입 비용의 정확한 산정이 요구된다. 본 연구에서는 폐기물 재활용에 따른 비용분석을 통해 제품별 발생 가능한 이익과 이익발생 확률 산정법을 제시하였다. 재활용 비용분석 항목으로 폐기물 분류 비용, 재활용 처리시설로의 운반비용, 재활용 제품생산비용 등을 고려하였으며, 또한 재활용 제품생산에 따른 이익분석을 위해 폐기물이 재활용 되지 못하고 폐기될 경우와 재활용될 경우를 서로 비교하여 그 차이를 이익으로 환산하여 추정하였다. 건설폐기물 매립지까지 거리가 늘어날수록 재활용에 따른 이익발생이 증가하였고 재활용 시설까지의 거리는 이익발생에 영향을 주었으며, 또한 재활용 제품 선정, 재활용 처리시설의 최적위치 결정, 목표가격 결정 등에 유용하게 활용할 수 있음을 확인하였다.

Keywords

References

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