Utilização de material proveniente de fresagem na composição de camadas de base e sub-base de pavimentos flexíveis.

Abstract

The pavement restoration services generate a large amount of reclaimed asphalt pavement, material with high constructive potential, coming from natural resources with increasingly reduced availability. This material can be recycled for use as a pavement material, for example, in the granulometric stabilization of pavement layers, a service in which mineral aggregates of similar performance to that offered by reclaimed asphalt pavement are used, however, it is often wasted, not having an ecologically correct final destination. This research evaluates the effectiveness of the use of reclaimed asphalt pavement in the stabilization of soils for composition of base and subbase layers of flexible pavements. For this, physical and mechanical characterization of the soil used in the research was carried out, and a mixture of 45% of this soil and 55% of of reclaimed asphalt pavement were determined, through the stabilization of the granulometry of the materials, aiming to frame the mixture in one of the bands granulometrically specified by DNIT for granulometrically stabilized bases (DNIT ES 141/2010). The addition of reclaimed asphalt pavement to the soil provided an increase of the mechanical properties, in terms of resilient modulus. Thus, the addition of reclaimed asphalt pavement, studied in this research, proved to be effective in the stabilization of the studied soil.