Dosagem de um pré-misturado a frio utilizando material asfáltico fresado.

Abstract

It is known that many highways in brazilian soil find themselves in poor conditions, needing maintenance and in some cases, even restoration, and yet, they don’t reach the expected performance. Through this scenario, those operations exploit resources directly and in many ways, they end up harming the environment. Facing these problems, the goal of this research is to analyze the feasibility of recycling the reclamed aggregate from the asphalt’s milling process, byproduct that is, in most cases, discarded in non authorized areas. This study aims, through laboratory tests, to elaborate one cold bituminous mixture with reclamed milled aggregate, for uses as superficial layer and maintenance of the pavement, in low and very low traffic lanes. In this research, for the achievement of the asphalt emulsion content percentage, were moulded 3 samples for each preliminary percentage (5%, 6%, 7%, 8%, and 9%), totalizing 15 samples. Therefore, was studied their volumetric parameters, which are the bulk density, the theoretical maximum density and the void volume. After that, was tested the Marshall stability and flow test, on those preliminary samples, in order to characterize them mechanically. With the results, was then determined the emulsion content percentage, which was 7%. This percentage was obtained through the aritmetic mean of the preliminar percentages which obtained the Best results. Lastly, were moulded 3 samples with this new percentage, for its mechanical characterization through resilience modulus test and tensile strenght test.