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A Comparative Study on the Quality of Recycled Aggregate for Concrete by Crushing Method

파쇄 방법에 따른 콘크리트용 순환골재의 품질 비교 연구

  • 최원영 (한국건설기술연구원 건축도시연구소) ;
  • 이세현 (한국건설기술연구원 건축도시연구소) ;
  • 김성환 (한성피씨건설)
  • Received : 2017.01.10
  • Accepted : 2017.06.06
  • Published : 2017.06.30

Abstract

In this study, the quality of recycled aggregate for concrete was investigated as the number of recycled aggregate crushing cycles, grinder and crusher, peeling and crushing. First, the quality of density, absorption ratio and solid content was improved as the separation distance decreased and the number of crushing increased, depending on the number of crushing of recycled aggregate and the distance between mantle and cone cave. The quality of density, absorption ratio and solid content was improved as the wire mesh used in striking plate and the number of hammers increased, depending on the type of striking plate and the number of hammers.

본 연구에서는 콘크리트용 순환골재 고품질화 생산 방안으로 순환골재 파쇄횟수, 파 분쇄기와 박리 및 마쇄기 접목에 따른 순환골재의 품질을 검토하였다. 먼저 순환골재의 파쇄횟수 및 맨틀과 콘케이브 이격거리에 따라서 이격거리가 좁을수록, 파쇄횟수가 증가할수록 밀도, 흡수율 및 실적률의 품질이 향상되는 것으로 나타났다. 한편, 타격판 종류와 해머 개수에 따라서는 와이어매쉬를 타격판으로하고, 해머 개수가 증가할수록 밀도, 흡수율 및 실적률의 품질이 향상되는 것으로 나타나 해머크러셔와 콘크러셔의 적절한 조합을 통한 콘크리트용 순환골재의 품질향상이 가능할 것으로 판단된다.

Keywords

References

  1. Kim, J.M. (2008). Optimum abrasing condition for recycled fine aggregate produced by low speed wet abraser using sulfur, Journal of Korea Concrete Institute, 20(5), 557-563 [in Korean]. https://doi.org/10.4334/JKCI.2008.20.5.557
  2. Kim, Y.S., Jun, S.C., Lee, S.H. (2004). "A study on analysis of production and facility status of recycled aggregates, Proceedings of Materials & Construction, Construction Management," Architectural Institute of Korea, Seoul, KOREA 25(1), 97-100.
  3. Lee, D.H. (2006). Recycling and Technology Development Trend of Waste Concrete, Recycling Technology Trend of Byproduct of Construction Industry, KOREA Land & Housing Corporation, Seoul.
  4. Lee, W.K. (2015). Effect of the amount of attached mortar of recycled aggregates on the properties of concrete, Journal of the Korea Recycled Construction Resources Institute, 3(2), 132-139 [in Korean]. https://doi.org/10.14190/JRCR.2015.3.2.132
  5. Ministry of Environment. (2008). Status of Waste Generation and Disposal Nationwide, Policy Briefing of Ministry of Environment, Sejong.
  6. Ministry of Environment. (2017). Construction Waste Recycling Promotion Act, Policy Briefing of Ministry of Environment, Sejong.
  7. Ministry of Land, Infrastructure and Transport. (2014). Amendment of Recycling Aggregate Quality Certification Processing, Policy Briefing of Ministry of Land, Infrastructure and Transport, Sejong.
  8. P. Kumar Metha. (2006). Properties and Materials, Concrete Microstructure, 29-32.