Performance of Recycled Aggregate Concrete after Washing Treatment of Aggregates

Dimitrios Triantafyllou, Ash Ahmed and John Kamau
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Dimitrios Triantafyllou: Civil Engineering Group. Leeds Beckett University
Ash Ahmed: Senior Lecturer in Materials Science School of the Built Environment & Engineering Leeds Beckett University Civic Quarter Northern Terrace Leeds LS2 8AG
John Kamau: Civil Engineering Group. Leeds Beckett University, Leeds

European Journal of Engineering and Technology Research, 2017, vol. 2, issue 9, 49-53

Abstract: Retrieval and reuse of crushed concrete aggregates (CCA) in the concrete industry is a common practice that has gained popularity due to environmental concerns that identify the saturation of landfill areas as a harmful and costly by-product of construction, and has therefore become a necessity for a sustainable, more well-coordinated effort towards improving concrete preparation. This research examines a natural method of CCA-washing that aims to effectively segregate contaminants from healthy material by allowing CCAs to sit outdoors for a period of time thus being subjected to several rain-washing cycles. Eleven mixes were prepared, a control mix with 100% natural/virgin concrete aggregates (NCA/VCA) and ten mixes with CCA content varying between 10-100% replacement. Findings showed that even up to 100% substitution a remarkable reduction of only 15% in compressive strength was observed, with no significant change or effect on the consistency; thus conferring potentially significant sustainability implications.

Keywords: Recycled Concrete Aggregate; Crushed Concrete Aggregate; Sustainable Concrete; Construction & Demolition Waste (search for similar items in EconPapers)
Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:epw:ejeng0:v:2:y:2017:i:9:id:60468

DOI: 10.24018/ejeng.2017.2.9.468

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