Estudos das prioridades físicas e mecânicas de misturas asfálticas recicladas com materiais fresados: estudo de caso - BR-230.

Abstract

The recycling of a pavement aims at to restitute the original physical and mechanical properties of the Reclaimed Asphalt Pavement and, if possible, to improve them. Amongst the properties stands out the breaking resistance by static shipment the fatigue resistance by repeated chargement and the resistance to the action of bad weathers and action of waters. At the same time, the recycling technique "in situ" in hot mix asphalt makes possible the use of Reclaimed Asphalt Pavement preventing, the inadequate disposal diminishing the ambiental impact The objective of this work was to study the physical and mechanical behavior of asphalt mixtures containing Reclaimed Asphalt Pavement, considering its utilization for the layers of binder and/or riding surface, as a way to establish the adequate content of Reclaimed Asphalt Pavement to make part of the composition of asphalt. The inherent activities to the experimental phase had been divided in two stages: studies of the physical properties of the materials that composed the mixture, and studies of the mechanical properties of the asphalt mixtures standard and recycled. Test of Granulometria, Extration of Asphalt Marshall, Indirect Tensile strenght for Diametrical Compression, Lottman Modified and of Module of Resilience had been carried through. Considering the limitations of this study of case, specific for the materials and adopted ratios, it can be inferred that the recycled mixtures more adjusted to be used as layer of rolling for flexible pavement had been the ones that had in its composition 10% and 30% of Reclaimed Asphalt Pavement and 3% of filler (lime)." These had presented compatible physical and mechanical properties with the requirements praised for the DNIT and the AASHTO.