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Life Cycle Assessment of Innovative Asphalt Mixtures Made with Crumb Rubber for Impact-Absorbing Pavements
University of Innsbruck, Austria.
RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.ORCID iD: 0000-0003-1565-1554
University of Bologna, Italy.
University of Innsbruck, Austria.
2022 (English)In: Sustainability, E-ISSN 2071-1050, Vol. 14, no 22, article id 14798Article in journal (Refereed) Published
Abstract [en]

This study applies the life cycle assessment methodology to evaluate the environmental impacts of shock-absorbing pavements fabricated with recycled materials (crumb rubber and a colored pigment called ferrotone), employing the “cradle-to-grave” approach, in which the impacts of all life cycle phases (from materials’ acquisition to the end-of-life of the pavement) are included. The analysis compares the impacts of standard and innovative asphalt materials, considering cold and hot production processes. In addition, three different lifespans are simulated for the pavement structures: the reference service life until the first intervention is considered to be 5 years, and the following scenarios consider that the alternative asphalt materials may last 20% less (4 years) or 20% longer (6 years) than the reference service life. The analysis uses non-renewable cumulative energy demand (nr-CED) and global warming potential (GWP) as main indicators to determine the environmental impacts over a 45-year analysis period. The results show that adopting the “dry process” (consisting of adding the rubber as a partial substitution for aggregates) increases the overall impacts due to the need for higher contents of binder. However, if the alternative pavement structures last 20% longer than the reference, they would generate lower impacts in terms of nr-CED and GWP. © 2022 by the authors.

Place, publisher, year, edition, pages
MDPI , 2022. Vol. 14, no 22, article id 14798
Keywords [en]
asphalt mixtures, crumb rubber, life cycle assessment, sustainability, urban pavements
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:ri:diva-61376DOI: 10.3390/su142214798Scopus ID: 2-s2.0-85142723569OAI: oai:DiVA.org:ri-61376DiVA, id: diva2:1717543
Note

Funding details: Horizon 2020 Framework Programme, H2020; Funding details: H2020 Marie Skłodowska-Curie Actions, MSCA, 765057; Funding details: European Commission, EC; Funding text 1: This project has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No. 765057.; Funding text 2: The authors appreciate the support given by the European Union by funding the SAFERUP! Project, an innovative training network devoted to develop safe, accessible, and urban pavements.

Available from: 2022-12-08 Created: 2022-12-08 Last updated: 2023-11-01Bibliographically approved

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Makoundou, Christina

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