During asphalt mixture service life, its structural and physical capabilities deteriorate progressively. A modal analysis using impact hammer excitation technique is put forward to measure the damping factor instead of the commonly destructive test described in the standards. Concerning to this modal approach, an aging procedure is presented to obtain and compare the vibration attenuation capacity variation of the mixtures considering aging deterioration. In this research, this new procedure has been applied to asphalt concrete and stone mastic asphalt mixtures with different amounts of polyethylene terephthalete. It has been validated using results from four-point bending test. Finally, the results confirmed that asphalt mixtures with 0–2% of polyethylene terephthalete present better vibration attenuation capacity than mixtures without it, even when aging appeared.
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