Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
권호 표지

Development of Recycled Aggregate Producing Circuit Using Autogenous mill

Autogenous mill을 이용(利用)한 순환골재(順換骨材) 생산(生産) 공정(工程) 개발(開發)

  • Kim, Kwan-Ho (Energy-system Engineering, Seoul National University) ;
  • Lee, Duck-Jae (Energy-system Engineering, Seoul National University) ;
  • Cho, Hee-Chan (Energy-system Engineering, Seoul National University) ;
  • Ahn, Ji-Whan (Korea Institute of Geoscience and Mineral Resources)
  • 김관호 (서울대학교 에너지시스템공학부) ;
  • 이덕재 (서울대학교 에너지시스템공학부) ;
  • 조희찬 (서울대학교 에너지시스템공학부) ;
  • 안지환 (한국지질자원연구원 자원활용소재부)
  • Published : 2007.10.27
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Abstract

In Korea, reutilization of construction waste is gaining attention as construction waste generated increases continuously. Currently, the concrete waste is simply crushed and used as a low value application such as paving, back filling, etc. To meet the demand of aggregate for construction and the resource efficiently, production of high quality recycled aggregate is necessary. Therefore, in this study, a better process for production of high quality recycled aggregate was developed using combination of heat pretreatment and autogenous milling. Test results showed that the recycled aggregate has a density of $2.5\;g/cm^3$ and a water absorption ratio of 3.0%, which meet the specification of the first class of KS F 2573. Currently, a pilot scale autogenous mill is being constructed and tests will be further conducted to develop a commerce-scale process.

건설폐기물 발생량이 매년 급격히 증가함에 따라 건설폐기물 처리의 중요성이 점차 심화되고 있으며, 그 중에서도 가장 많은 비중을 차지하고 있는 폐콘크리트의 처리에 가장 많은 노력을 기울이고 있다. 현재 폐콘크리트는 단순 파쇄를 통해 매움재나 채움재 등의 저급한 용도의 순환골재로 재활용되고 있다. 그러나 부족한 구조용 골재 수급문제를 해결하고 자원의 효율적인 활용을 위해서, 천연골재를 대체하여 구조용 골재로 사용될 수 있는 고품질의 순환골재 생산이 절실히 요구되고 있다. 따라서 본 연구에서는 autogenous mill과 가열처리 방법을 이용하여 고품질 순환골재 생산 공정을 개발하였다. 개발된 공정을 이용하여 약 30분간 파분쇄과정을 통해 생산된 순환골재의 품질은 밀도 $2.5\;g/cm^3$이상, 흡수율 3% 이하로 KS F 2573의 1종 굵은 순환골재 품질 기준을 만족하였으며, 이를 바탕으로 고품질의 순환골재 생산을 위한 연속공정을 개발하였다.

Keywords

References

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