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Properties of Eco-Construction Material Using Recycled Sewage Sludge Ash

하수슬러지 소각재를 재활용한 친환경 건설 소재의 재료적 특성

  • Jo, Byung-Wan (Dept. of Civil Engineering, Hanyang University) ;
  • Lee, Jea-Ik (Advanced Environment Tech Research Dept., Korea Institute of Construction Technology) ;
  • Park, Seung-Kook (Korea Research Institute for Construction Policy) ;
  • Lee, Jae-Seung (Dept. of Civil Engineering, Hanyang University)
  • Published : 2007.12.31

Abstract

As the 21st century began, cement and concrete that are representatives of modem building materials became a major factor in global warming, air pollution and environmental pollution. Also, the problems that are generated while pursuing high performance and high strength became social issues. Therefore, it has become urgent to prepare counter plans. This study has aimed at the recycling of sewage sludge ash and developing it as a new concept in building material which serves the environmental considerations for long-lasting developmental purpose. Also, the study aimed to find a substitute for scarce natural resources and to secure high techniques for waste recycling. The purpose of this study was also to solve fundamentally secondary environmental pollution. The results revealed that the chemical components of sewage sludge ash are mainly $SiO_2\;and\;Al_2O_3$ which are similar to the components of pozzolan. Also, it was identified that sewage sludge ash can be utilized as a hardened specimen with an alkali activated pozzolan reaction. Considering the possibility of appropriate strength development and the advantage of drying shrinkage, compared with that of cement, it was believed that sewage sludge ash can demonstrate a function as a substitute for cement given.

21세기에 들어와 현대의 건설 재료로 대표되는 시멘트 콘크리트는 이산화탄소 발생 등에 의한 지구온난화현상, 대기오염, 환경오염 및 파괴 등에 대한 환경적 문제 및 고성능, 고강도 등에 대한 사회적 문제에 대한 대책마련이 시급한 실정이다. 이에 본 연구에서는 하수슬러지 소각재를 재활용하여 친환경적이며 지속 가능 개발에 적합한 신개념 건설 소재를 개발하여 부족한 천연자원을 대체하고, 폐기물 자원화 기술 확보 및 2차 환경오염 문제를 근본적으로 해결하고자 하였다. 연구 결과, 하수슬러지의 화학성분비는 $SiO_2$$Al_2O_3$로 주로 이루어져 있으며, 포졸란 물질의 성분과 유사하였다. 또한 하수슬러지 소각재는 알칼리 활성화에 의해 포졸란반응성을 갖는 경화체로 활용될 수 있음을 알 수 있었으며, 시멘트 콘크리트와 비교하여 적정한 강도 발현의 가능성과 건조수축 등의 유리한 점을 고려할 때, 추후 연구를 통하여 시멘트 대체재로서의 기능을 충분히 발휘할 수 있을 것으로 판단된다.

Keywords

References

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  1. Pozzolanicity of Calcined Sewage Sludge with Calcination and Fineness Conditions vol.27, pp.1, 2015, https://doi.org/10.4334/JKCI.2015.27.1.065