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Development of Recycled Aggregate Producing Circuit Using Autogenous mill  

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)
Publication Information
Resources Recycling / v.16, no.5, 2007 , pp. 25-30 More about this Journal
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.
Keywords
Recycled aggregate; Autogenous mill; Waste concrete; Heat treatment;
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