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This paper aims to investigate cracking propagation and asphalt mixtures failure. Cracking is considered one of the major distresses mechanisms affecting the serviceability and quality of flexible pavement structures. This study evaluated cracking resistance, as well as the principle of cracking propagation in hot mix asphalt with three different types of asphalt binders. The experiment was carried out by means of both static semi-circular bending test (EEFAS) and dynamic (EDFAS).  Therefore, this research investigated three asphalt concrete mixes, designed by the Superpave method: one with conventional neat binder (CAP), one polymer modified (AMP) and a third asphalt-rubber binder mix (AB), namely mixes A, B and C. The results indicated higher stiffness of the AMP mixture, which also presented greater fatigue life. Conversely, the specimens with CAP and AB demonstrated more ductility, with less microcracks propagation speed.

Utilização do ensaio de flexão sobre amostra semicircular para avaliação da propagação do trincamento em misturas com diferentes ligantes