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dc.contributor.author
Mikhailenko, Peter
dc.contributor.author
Piao, Zhengyin
dc.contributor.author
Kakar, Muhammad R.
dc.contributor.author
Athari, Sahand
dc.contributor.author
Bueno, Moises
dc.contributor.author
Poulikakos, Lily D.
dc.date.accessioned
2021-06-07T10:27:20Z
dc.date.available
2021-06-07T02:32:35Z
dc.date.available
2021-06-07T10:27:20Z
dc.date.issued
2021-09
dc.identifier.other
10.1016/j.susmat.2021.e00295
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/488455
dc.identifier.doi
10.3929/ethz-b-000488455
dc.description.abstract
Construction materials research is consistently striving to improve sustainability, in the reduction of virgin materials by use of otherwise landfilled materials of the same purpose. Crumb rubber (CR) from end-of-life tires and polyethylene terephthalate (PET) from post-consumer liquid containers are two of the most commonly circulating forms of waste in the urban environment. This study investigated the replacement of semi-dense asphalt (SDA) sand by untreated mechanically shredded CR and PET, at 2.5 and 5.1% respectively by total mass of aggregates. The mixtures were evaluated by compactability, indirect tensile strength (ITS), fracture energy (FE), water sensitivity by ITS ratio (ITSR%), surface texture and acoustic absorption tests. After compaction, the CR and PET samples experienced an elastic rebound effect, which resulted in the air voids being higher than expected. Also, the PET samples required more compaction energy. The ITS, FE and ITSR% were significantly reduced with CR replacement, while the PET mixture performed similar to the control, especially in FE. The sound absorption was related more to the air voids than the material type, although the absorption coefficients of the SDA was not found to be significant. The CR reduced the texture level of the pavement significantly in comparison to the control, while texture level remained the same for the PET mixture, despite a difference in the porosity. Further studies were performed using a mixture replacing PET by aggregate volume at 5.1%, comparing it to the control SDA in terms of low temperature cracking and permanent deformation at 50 °C. While the compactability of the PET mixture was now similar to that of the control, the resistance to cracking and permanent deformation was lower. Although the PET mixture had some interesting ductility properties, the replacement of sand by CR and PET is not recommended, and the more common use as asphalt mixture modifiers with fairly low addition contents of around 1% is more sound.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Asphalt pavements
en_US
dc.subject
Crumb rubber (CR)
en_US
dc.subject
Polyethylene terephthalate (PET)
en_US
dc.subject
Water sensitivity
en_US
dc.subject
Sound absorption
en_US
dc.subject
Semi-circular bending
en_US
dc.title
Effect of waste PET and CR as sand replacement on the durability and effect of waste PET and CR as sand replacement on the durability and acoustical properties of semi dense asphalt (SDA) mixtures
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
Sustainable Materials and Technologies
ethz.journal.volume
29
en_US
ethz.pages.start
e00295
en_US
ethz.size
12 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Amsterdam
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2021-06-07T02:32:43Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-06-07T10:27:40Z
ethz.rosetta.lastUpdated
2022-03-29T08:28:10Z
ethz.rosetta.versionExported
true
ethz.COinS
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