Mechanical Behavior of Asphalt Mixtures Applied in Field in the Southern Brazil

This work aimed to comprehensively verify the behavior against permanent deformation and fatigue in order to obtain an overview of the situation of field mixtures in Rio Grande do Sul, state in south of Brazil. In this way, the study proposes evaluate eleven mixtures used in the field. These mixtures consist of different mineralogical aggregates, different nominal sizes, different granulometric compositions and asphalt binders. The linear viscoelastic characterization (LVE) behavior, the resistance to permanent deformation, and to fatigue was evaluated for establish a global classification against the two main defects in asphalt concrete pavements. The results show differences in LVE behavior. The Flow Number showed that the Polymer Modified Binder (PMB) and TLA modified asphalt have greater resistance to permanent deformation, whereas mixtures with conventional 50/70 penetration binder showing worse results. As for fatigue, mixtures with PMB and rubber asphalt show significantly better results than mixtures with 50/70 binder and TLA modified asphalt.