Introdução do coeficiente de uniformidade para avaliação de revestimentos asfálticos do tipo tratamentos superficiais
DOI:
https://doi.org/10.14295/transportes.v26i1.1371Keywords:
Tratamento superficial por penetração, Defeitos, Perda de agregado, Coeficiente de uniformidade.Abstract
The surface treatments are the most used type of coating in Brazil in Low Traffic Volume Roads, more specifically the chip seal. After field and laboratory investigations, it was observed that the main defects of chip seals are aggregate loss (or raveling) and bleeding, which can affect its performance and increase considerably the paving costs. In Brazil there are still few studies of design and performance of chip seals in the laboratory phase to predict these two defects. Thus, it was investigated materials and methodologies 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 distribution of the aggregate that has potential to predict bleeding and raveling of this type of coating. 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 reviewed.Downloads
References
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