A cost-effective recycled aggregates classification procedure for construction and demolition waste evaluation

https://doi.org/10.1016/j.conbuildmat.2022.126642Get rights and content
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A classification for mixed recycled aggregates is proposed to improve higher-value uses.

The Aggregate Potential (Physical) (AP(P)) is defined as an indicator of recycled aggregate quality.

Simple treatment procedures are checked with this AP(P) for potential improvements of quality.

A more cost-effective manufacturing process can be developed with this classification procedure.


Current procedures for characterization of recycled aggregates from construction and demolition waste can be time-consuming and costly, and hinder a greater breadth of re-use application. A multi-level Aggregate Potential (Physical) (AP(P)) scale is presented as a simple and cost-effective procedure for this characterization. To validate the AP(P), a group of mixed recycled aggregate samples were tested for composition, density, fines content, water absorption and freeze–thaw resistance. The results identify different quality ratings with potential uses, and simple treatments for higher value purposes. This procedure is purported to improve recycled aggregate manufacturing and secondary material markets, therefore contributing to a more circular economy.


Recycled aggregates
Construction and demolition waste
Circular economy
Aggregate classification

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Present address: University of Salford, Maxwell Building, The Crescent, Salford, M5 4WT (UK).


Present address: Melin Consultants Ltd, The Beacon, Llanelli Gate Business Park, Llanelli, SA14 8LQ (UK).