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dc.contributor.authorHasan, Umair
dc.contributor.authorWhyte, Andrew
dc.contributor.authorAl Jassmi, H.
dc.identifier.citationHasan, U. and Whyte, A. and Al Jassmi, H. 2020. Life cycle assessment of roadworks in United Arab Emirates: Recycled construction waste, reclaimed asphalt pavement, warm-mix asphalt and blast furnace slag use against traditional approach. Journal of Cleaner Production. 257: Article No. 120531.

© 2020 Elsevier Ltd Life cycle assessment methodology was applied in this study to calculate environmental impacts of a 3.5-km-long dual carriageway asphalt highway section case study in Abu Dhabi across following life cycle stages: material extraction and production, material and equipment transport, construction, maintenance and rehabilitation; assuming a 30 years lifetime. Environmental impact assessment for air emissions and energy consumption generated by complete roadworks, namely: earthworks; pavement courses; concrete works for traffic barriers, kerbs, parapets, traffic signs, and light systems. A comprehensive analysis of environmental impact reduction was performed using recycled construction waste; reclaimed asphalt pavement; warm-mix asphalt with synthetic zeolite additives; and, slag as alternate material and production options. Actual field data for the road section using virgin materials and traditional asphalt production mix for pavement works and Portland cement concrete for the complete concrete works were used as the baseline case. Routine maintenance and periodic rehabilitation by milling and repaving wearing course (<4.5 cm depth) every 5 years was also analysed from an environmental impact reduction perspective. Environmental assessment considered all indicators from ReCiPe midpoint method. Results show that earthworks account for a significant portion (26% of CO2eq.) of the environmental impacts for complete roadworks. The life cycle impact results of hot-mix asphalt and warm-mix asphalt were almost equal due to addition of synthetic zeolites. Results showed significant environmental impact reduction across all indicators, after coupling all alternate options as: 34% in CO2eq.; 48% in energy consumption; 24.4% in NOxeq.; 21.53% in PM2.5eq.; 21.2% in acidification; and, 10.4% in land use. Monte Carlo simulations confirm these results and the sensitivity of environmental benefits to the allocation methodology was also investigated, which showed that the results were only marginally sensitive to the allocation approach. This study noted higher environmental benefits than reported in roadworks literature due to alternate material and asphalt production options.

dc.publisherELSEVIER SCI LTD
dc.subjectScience & Technology
dc.subjectLife Sciences & Biomedicine
dc.subjectGreen & Sustainable Science & Technology
dc.subjectEngineering, Environmental
dc.subjectEnvironmental Sciences
dc.subjectScience & Technology - Other Topics
dc.subjectEnvironmental Sciences & Ecology
dc.subjectRoad sustainability
dc.subjectAsphalt pavements
dc.subjectLife cycle assessment
dc.subjectRecycled materials
dc.subjectWarm-mix asphalt
dc.titleLife cycle assessment of roadworks in United Arab Emirates: Recycled construction waste, reclaimed asphalt pavement, warm-mix asphalt and blast furnace slag use against traditional approach
dc.typeJournal Article
dcterms.source.titleJournal of Cleaner Production
curtin.departmentSchool of Civil and Mechanical Engineering
curtin.accessStatusOpen access
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidWhyte, Andrew [0000-0002-7020-0951]
curtin.identifier.article-numberARTN 120531
curtin.contributor.scopusauthoridWhyte, Andrew [12794669900]

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