• Title/Summary/Keyword: 콘크리트 폐기물

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Development of High quality Recycled Aggregate Production Process from Waste Concrete for Resource Circulation System (자원순환형(資源循環型) 사회(社會) 구축(構築)을 위한 고품질(高品質) 순환골재(循環骨材) 생산(生産) 공정(工程) 개발(開發) 연구(硏究))

  • Kim, Kwan-Ho;Cho, Hee-Chan;Ahn, Ji-Whan
    • Resources Recycling
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    • v.18 no.3
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    • pp.27-35
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    • 2009

  • To solve resource exhaustion and waste management problems caused by mass consumption, there are many efforts to change from resource consumption system to recycling system. Specially, interests about management of construction waste have increased, but efficient recycling system of waste concrete is not established yet. In this study, high quality recycled aggregate processing circuit was developed to recycle waste concrete. From the waste concrete which is a hydrated compound with coarse aggregate, fine aggregate, and cement material, high quality recycled coarse aggregate for concrete making was produced by autogenous milling and heat pretreatment method. After then, refinement process was performed to separate fine aggregate and cement material from waste concrete fines by sink float separation and hindered-settling separation. As a result, high quality recycled aggregate was produced from waste concrete by developed processing circuit.

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The Dismantling and Disposal Strategy of a Biological Shield for Minimization of Radioactive Concrete Waste During Decommissioning of a Nuclear Power Plant (원전 해체 방사성 콘크리트 폐기물 최소화를 위한 생물학적 차폐체 제거 및 처분 전략)

  • Cheon, Cheol-Seung;Kim, Chang-Lak
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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    • v.15 no.4
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    • pp.355-367
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    • 2017

  • The decommissioning of Kori unit 1, which was permanently shut down in June of 2017, will be the first instance of the dismantling of a commercial nuclear power plant in Korea. The disposal of waste during the dismantling process accounts for a large part of the total decommissioning cost. Therefore, structures consisting of activated and contaminated concrete must be economically and safely dismantled by establishing a proper dismantling strategy. This study focuses on optimized dismantling and disposal scenarios pertaining to a biological shield. Several dismantling cases, regulations and technologies related to waste treatment as these practices pertain to nuclear power plants are analyzed. To minimize the amount of waste from the biological shield dismantling process, an optimized dismantling scenario is presented and disposal alternatives for dismantled concrete waste are proposed.

  • https://doi.org/10.7733/jnfcwt.2017.15.4.355 인용 PDF KSCI