The feasibility of recycled micro polyethylene terephthalate (PET) replacing natural sand in hot-mix asphalt

Ferreira, José Wilson dos Santos; Marroquin, John Fredy Ricardo; Felix, Jorlandio Francisco; Farias, Marcio Muniz; Casagrande, Michéle Dal Toé

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Campo DC	Valor	Idioma
dc.contributor.author	Ferreira, José Wilson dos Santos	-
dc.contributor.author	Marroquin, John Fredy Ricardo	-
dc.contributor.author	Felix, Jorlandio Francisco	-
dc.contributor.author	Farias, Marcio Muniz	-
dc.contributor.author	Casagrande, Michéle Dal Toé	-
dc.date.accessioned	2022-08-10T12:04:19Z	-
dc.date.available	2022-08-10T12:04:19Z	-
dc.date.issued	2022	-
dc.identifier.citation	FERREIRA, José Wilson dos Santos et al. The feasibility of recycled micro polyethylene terephthalate (PET) replacing natural sand in hot-mix asphalt. Construction and Building Materials, v. 330, 127276, 2 maio 2022. DOI: https://doi.org/10.1016/j.conbuildmat.2022.127276.	pt_BR
dc.identifier.uri	https://repositorio.unb.br/handle/10482/44475	-
dc.language.iso	Inglês	pt_BR
dc.publisher	Elsevier Ltd.	pt_BR
dc.rights	Acesso Restrito	pt_BR
dc.title	The feasibility of recycled micro polyethylene terephthalate (PET) replacing natural sand in hot-mix asphalt	pt_BR
dc.type	Artigo	pt_BR
dc.subject.keyword	Plástico reciclado	pt_BR
dc.subject.keyword	Asfalto - concreto	pt_BR
dc.subject.keyword	Microplástico	pt_BR
dc.subject.keyword	Sustentabilidade	pt_BR
dc.identifier.doi	https://doi.org/10.1016/j.conbuildmat.2022.127276	pt_BR
dc.relation.publisherversion	https://www.sciencedirect.com/science/article/pii/S0950061822009564?via%3Dihub	pt_BR
dc.description.abstract1	Microplastic pollution is contaminating the human food chain worldwide. At the same time, construction excessively exploits natural sand, requiring the incorporation of alternative materials to achieve sustainable development. From this scenario, the study evaluates the potential of recycled micro-PET replacing natural sand on hot-mix asphalt (HMA) mechanical behavior by weight and volume. The materials’ characterization occurred via XDR, XRF, TGA/DTG, FTIR, SEM, and AFM tests. The Superpave mix design, X-ray micro-tomography (μ-CT), indirect tensile strength (ITS), resilient modulus (RM), and moisture damage tests were performed in conventional and PET-incorporated mixtures, considering 2% (in wt.), 4% (in wt.), and 8% (in wt. and vol.) substitutions. The 8% PET replacing sand by volume showed no significant change in the mixture’s optimum asphalt content (OAC) due to the binder absorption equivalence between the materials’ surfaces. For the same binder content, the increase in PET content in weight decreased the binder film thickness and increased the volume of voids, visualized as non-permeable micropores in μ-CT. Although adding and incrementing PET reduced the mixtures’ ITS and RM values, its most significant contribution was enhancing the resistance to moisture damage, especially for regions where the pavement deterioration process is associated with an intensive rainfall regime, thus demonstrating this application’s practical feasibility in concrete asphalt paving.	pt_BR
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