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The feasibility of recycled micro polyethylene terephthalate (PET) replacing natural sand in hot-mix asphalt by José Wilson dos Santos Ferreira; John Fredy Ricardo Marroquin; Jorlandio Francisco Felix; Marcio Muniz Farias; Michéle Dal Toé Casagrande is a scholarly article available to read on EtoBox.

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

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 an

Author

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

Publisher

Elsevier BV

Published

2022

Language

EN