Estudo comparativo de misturas asfálticas produzidas com diferentes fíleres

Abstract

Roads are still the main means of transport in Brazil, recent studies say that the paved road network in the country is very small, the country's need makes this data gradually changing, requiring a greater efficiency in transportation infrastructure, mainly roads with a higher level of quality. Brazilian pavements are almost entirely, flexible or asphaltic, the purpose of which is to promote traffic safety and withstand the effects of the climate and the flow of vehicles. Therefore, the structure of the floor is essential and must be composed of layers that distribute and support the loads that are submitted. A pavement is constructed from asphalt mixtures that are composed of aggregates and binders, dosed in order to meet certain parameters. The asphalt mixture is influenced by the materials, the preparation process and the properties that make it up. This research aims to contribute to the understanding of the effects that the filer aggregate present in the asphalt mixture, has on an asphalt mixture. To achieve the goal, the proposed research study dosages of two mix designs, one with a powder-stone fillers and one with Portland cement filler. Firstly, the characterization of crushed aggregates and conventional asphalt binder CAP 50/70 was performed, following the procedures and requirements established by the National Department of Infrastructure and Transport (DNIT). The second part of the study was the realization of dosages by the Marshall method. At the end of the study, with the two optimum dosages for each mixture, results were obtained that demonstrated that for this study it would be more feasible to dose mixtures with powdered stone, and more economical, presented better results. It should also be taken into account that further laboratory and field trials and further studies should be carried out.