STUDY OF THE FEASIBILITY OF USING POLYETHYLENE TEREPHTHALATE (PET) WASTE AS PART OF THE FINE AGGREGATE IN STONE MATRIX ASPHALT (SMA) MIXTURES

Authors

DOI:

https://doi.org/10.20873/2025_jul_18498

Abstract

Stone Matrix Asphalt (SMA) mixtures, known for their good performance in heavy traffic pavements, present a viable alternative for road pavements experiencing increasing traffic volumes. However, these mixtures use large amounts of fine aggregates to fill the voids left by coarse aggregates. Therefore, one option for replacing part of the fine aggregate is to use polyethylene terephthalate (PET) waste, which also serves as a recycling alternative. Thus, this research aimed to study the mechanical behavior of SMA type asphalt mixtures with partial substitution of fine aggregate with PET. The asphalt mixtures conformed to the 19.0 mm specification of the AASHTO MP8-02 standard, consisting of CAP 50/70 binder, crushed stones 1 and 0, stone dust, and PET waste. Cylindrical test specimens were molded at the design binder content using the Marshall method, and then tested for resilience modulus and tensile strength parameters. The test results showed that the tensile strength values were similar for both mixtures, while for the resilience modulus, the mixtures with PET showed values 36% lower than the standard mixtures.

Published

2025-07-17

How to Cite

Albino Botelho, F., & Sereni Ildefonso, J. (2025). STUDY OF THE FEASIBILITY OF USING POLYETHYLENE TEREPHTHALATE (PET) WASTE AS PART OF THE FINE AGGREGATE IN STONE MATRIX ASPHALT (SMA) MIXTURES. DESAFIOS - Revista Interdisciplinar Da Universidade Federal Do Tocantins, 12(4), 1–20. https://doi.org/10.20873/2025_jul_18498