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도로건설공사 토공작업부에 대한 환경부하 영향인자 분석

An Analysis of Factors Affecting Environmental Load in Earthwork Type of Road Project

  • Park, Jin-Young (Department of Civil Engineering, Kyungpook National University) ;
  • Im, Je-Gyu (Department of Civil Engineering, Kyungpook National University) ;
  • Kim, Byung-Soo (Department of Civil Engineering, Kyungpook National University)
  • 투고 : 2018.04.02
  • 심사 : 2018.04.23
  • 발행 : 2018.07.31

초록

건설산업에서 LCA (Life Cycle Assessment)를 활용하여 환경영향을 평가하려는 시도가 점차 증가하고 있다. 그러나 제한된 사업예산과 일정으로 인해 신속한 의사결정을 수행해야 하는 국내 건설산업에서 모든 자재와 에너지를 대상으로 환경부하량에 대한 검토를 수행하는 것은 곤란하다. 따라서 친환경성 확보를 위한 의사결정과정에서 환경부하 저감을 위해 중점적으로 검토가 수행되어야 하는 주요 영향인자와 이를 환경영향평가로 연계할 수 있는 정량화된 정보의 제공이 요구된다. 이 연구에서는 이러한 정보의 제공을 위해 도로건설공사 사례의 LCA결과를 분석하였다. 분석결과 경유, 레미콘, 우레탄계도료, 골재, 아스팔트콘크리트가 도로 토공작업부에서 환경부하량의 93.17%를 발생시키는 주요 영향인자로 조사되었다. 도로 토공작업부 1km를 시공할 때 이들 영향인자에 의해 발생하는 총환경비용은 약 242백만원이며 레미콘과 아스팔트콘크리트의 작업물량 10%를 절감함에 따라 5.02%와 2.28%의 탄소배출량 감축효과를 얻을 수 있다. 두 자원의 탄소배출량 감축을 통해 1km당 약 11백만원의 환경비용을 절감할 수 있는 것으로 분석되었다. 도로 토공작업부의 탄소배출량 감축을 위해서는 레미콘과 아스팔트콘크리트의 사용량을 감소시키기 위한 신공법이나 친환경자재의 적극적인 개발과 도입이 필요할 것으로 판단된다.

In the construction industry, attempts to evaluate the environmental impact of products through life cycle assessment (LCA) approach has been on the rise. However, the domestic construction industry needs to make rapid decisions due to limited budget and schedule, so it is difficult to carry out a review of the environmental load on all resources. The decision-making process requires information on the major influence factors that should be focused on to reduce environmental load. And this information should be quantified so that it can be linked to environmental impact assessment. In this study, the LCA results of road construction cases were analyzed to provide such information. As a result, diesel, ready-mixed concrete, urethane-based paint, aggregate, and asphalt concrete were found to be the main factors that generated 93.17% of the environmental load in the earthwork type of road project. The total environmental cost caused by these affecting factors when constructing 1 km of earthwork type of road project is 242 million won. The analysis also shows that a 10% reduction in the amount of ready-mixed and asphalt concretes can reduce carbon emissions by 5.02% and 2.28% while reducing environmental costs by 11 million won per kilometer. In order to reduce carbon emissions of the earthwork type of road project, it is necessary to actively develop and introduce new methods and eco-friendly materials to reduce the overall use of ready-mixed concrete and asphalt concrete.

키워드

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