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TitleA new life for cross-linked plastic waste as aggregates and binder modifier for asphalt mixtures
Author(s)Costa, Liliana Marisa Barros
Peralta, Joana
Oliveira, Joel
Silva, Hugo Manuel Ribeiro Dias da
KeywordsAggregate substitution
Asphalt mixture performance
Binder modification
Cross-linked polyethylene
Mix design
Plastic waste
Issue date2017
JournalApplied Sciences
CitationCosta L., Peralta J., Oliveira J. R. M., Silva H. M. R. D. A New Life for Cross-Linked Plastic Waste as Aggregates and Binder Modifier for Asphalt Mixtures, Applied Sciences, Vol. 7, Issue 603, doi:10.3390/app7060603, 2017
Abstract(s)Every year, millions of tons of plastic waste, with potential to be reused, are wasted in landfills. Based on a literature review and in a local market analysis, cross-linked polyethylene (PEX) waste arose as the material with the greatest potential to be tested for incorporation in asphalt mixtures due to the difficulty in its recycling and the lack of solutions for its reuse. Thus, in the present work, mixtures produced with and without PEX were tested in order to compare their performance, aiming at understanding if this waste could successfully be used as an alternative material for this type of application. Thus, water sensitivity, rutting resistance, stiffness modulus and fatigue cracking resistance tests were carried out on asphalt mixtures with up to 5% PEX. Based on the results obtained, it can be concluded that the incorporation of PEX in asphalt mixtures is a viable solution for paving works, especially when high service temperatures are expected. It also decreases the density of the mixture, which can be attractive to lighten structures. Thus, this technology contributes to give new life to cross-linked polyethylene plastic waste.
Publisher version
AccessOpen access
Appears in Collections:C-TAC - Artigos em Revistas Internacionais

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