Introdução do coeficiente de uniformidade para avaliação de revestimentos asfálticos do tipo tratamentos superficiais

Abstract

The surface treatments are the most used type of coa!ng in Brazil in Low Traffic Volume Roads, more specifically the chip seal. AFer field and laboratory inves!ga!ons, it was observed that the main defects of chip seals are aggregate loss (or raveling) and bleed-ing, which can affect its performance and increase considerably the paving costs. In Bra-zil there are s!ll few studies of design and performance of chip seals in the laboratory phase to predict these two defects. Thus, it was inves!gated materials and methodolo-gies employed at North Carolina State University and it was verified that the coefficient called Performance-Based Uniformity Coefficient (PUC) is a parameter associated with the granulometric distribu!on of the aggregate that has poten!al to predict bleeding and raveling of this type of coa!ng. It was concluded that PUC is an excellent parameter to be introduced in chip seal design procedures and that the ranges recommended by DNIT to chip seals should be reviewe