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Performance of Recycled Aggregate Concrete after Washing Treatment of Aggregates

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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)

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.

Suggested Citation

  • Dimitrios Triantafyllou & Ash Ahmed & John Kamau, 2017. "Performance of Recycled Aggregate Concrete after Washing Treatment of Aggregates," European Journal of Engineering and Technology Research, European Open Science, vol. 2(9), pages 49-53, September.
    • Handle: RePEc:epw:ejeng0:v:2:y:2017:i:9:id:60468
    DOI: 10.24018/ejeng.2017.2.9.468
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