Research Article

Performance of Recycled Aggregate Concrete after Washing Treatment of Aggregates

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
* Corresponding author
John Kamau
Civil Engineering Group. Leeds Beckett University, Leeds
DOI icon 10.24018/ejeng.2017.2.9.468

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Submitted 2017-09-12
Published 2017-09-30

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Table of Contents

Article Main Content

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

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