Environmental and economic life cycle assessment of recycled aggregates concrete in the United Arab Emirates

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

This paper studies the potential environmental and economic impact of replacing natural aggregates (NA) with recycled aggregates (RA) in the production of different sustainable concrete mixes in the United Arab Emirates (UAE). A life cycle assessment (LCA) was carried out according to the methodology proposed by the international standards of the series ISO 14040. The performance of concrete mixes having a similar design compressive strength was evaluated. Results showed that the inclusion of steel fibers (SF) led to an increase in the global warming potential (GWP), whereas mixes with cement replacement by fly ash, slag, or microsilica recorded a reduction in GWP. Furthermore, SF‐reinforced mixes created with 100% RA were at least three times more expensive than the NA‐based control mix, while the cost of those with cement replacement by min-eral additives was generally similar to that of the control. Material transportation was found to be a main contributor to the environmental and economic impacts, only second to cement, and its con-tribution increased with longer distances and steel fiber incorporation and decreased with RA re-placement. To integrate these individual measures and select optimum mixes for various applica-tions, multifunctional performance indices were developed. Research findings highlight the possi-bility to fully replace NA with RA (100%) while maintaining the performance and improving the economic and environmental impacts of concrete produced in the UAE.

Original languageEnglish
Article number10348
JournalSustainability (Switzerland)
Volume13
Issue number18
DOIs
Publication statusPublished - Sep 2021

Keywords

  • Economic impact
  • Environmental impact
  • Life cycle assessment
  • Multifunctional performance indices
  • Recycled aggregate

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Renewable Energy, Sustainability and the Environment
  • Environmental Science (miscellaneous)
  • Energy Engineering and Power Technology
  • Management, Monitoring, Policy and Law

Fingerprint

Dive into the research topics of 'Environmental and economic life cycle assessment of recycled aggregates concrete in the United Arab Emirates'. Together they form a unique fingerprint.

Cite this