The replacement of natural aggregates with recycled aggregates is hampered by the industry’s perception that recycled aggregates are highly variable in quality and that the cost and time-lag to ensure the quality of recycled aggregates for high-end applications is prohibitive. There is a need to cost-effectively measure the quality of recycled aggregates and make this information available online to ensure that it meets the industry’s requirements. There- fore, innovative recycling technologies that can efficiently identify different contaminant materials play a vital role in upcycling End-of-Life (EoL) concrete and implementing a circular economy.
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Francesco Di Maio, Cheng Chang, Ali Vahidi, Abraham T. Gebremariam and Peter Rem, Resource & Recycling, Department of Engineering Structures, Faculty of Civil Engineering and Geosciences, Delft University of Technology, The Netherlands