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Development of High quality Recycled Aggregate Production Process from Waste Concrete for Resource Circulation System  

Kim, Kwan-Ho (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)
Publication Information
Resources Recycling / v.18, no.3, 2009 , pp. 27-35 More about this Journal
Abstract
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.
Keywords
Waste concrete; Gentle breakage; Gravity separation; Liberation; Water absorption;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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