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A comparative environmental impact analysis of asphalt mixtures containing Crumb Rubber and Reclaimed Asphalt Pavement using Life Cycle Assessment

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2019
bitstream_7146.pdf (1.358Mb)
Authors
Bressi, Sara
Santos, Joao
Orešković, Marko
Losa, Massimo
Article (Accepted Version)
,
Taylor&Francis
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Abstract
Recently, the reduction of the environmental burdens related to highway infrastructures has been in the spotlight. Within this context, the use of recycled materials in bituminous mixtures for road pavement construction and maintenance has the potential to mitigate the excessive use of non-renewable resources. Nevertheless, the material consumption is only one of the aspects that affects the sustainability of an infrastructure. Other relevant aspects related to environmental issues should be considered. The objective of this work is to evaluate the potential environmental impacts of asphalt mixtures containing crumb rubber (CR) (vulcanised or devulcanised) and reclaimed asphalt pavement (RAP) assuming different Degree of binder Activation (DoA) of the aged binder by means of a life cycle assessment (LCA). The results show that the small amount of CR used for bituminous mixtures application does not justify all the additional consumption of resources and emissions associated with its tr...eatment. These results are explained by the higher environmental impacts stemming from the treatment of the rubber and the higher amount of bitumen employed in the mixture. In turn, for mixtures containing RAP the analysis revealed an improvement in the score of all the environmental indicators considered.

Keywords:
Life cycle assessment / Crumb rubber / devulcanisation / RAP / base course / road sustainable materials
Source:
International Journal of Pavement Engineering, 2019
Publisher:
  • Taylor&Francis
Projects:
  • Utilization of by-products and recycled waste materials in concrete composites in the scope of sustainable construction development in Serbia: investigation and environmental assessment of possible applications (RS-36017)
Note:
  • This is the peer-reviewed version of the article: S. Bressi, J. Santos, M. Orešković, and M. Losa, ‘A comparative environmental impact analysis of asphalt mixtures containing Crumb Rubber and Reclaimed Asphalt Pavement using Life Cycle Assessment’, International Journal of Pavement Engineering, 2019, https://doi.org/10.1080/10298436.2019.1623404

DOI: 10.1080/10298436.2019.1623404

ISSN: 1029-8436

WoS: 000472265100001

Scopus: 2-s2.0-85067648579
[ Google Scholar ]
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URI
http://grafar.grf.bg.ac.rs/handle/123456789/1751
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