Critérios para os resultados do ensaio uniaxial de carga repetida de misturas asfálticas em laboratório a partir do desempenho em campo

Abstract

The selection of asphalt mixtures that resist to permanent deformation in the field has encouraged the development of the present research. The main goal is to evaluate the relationship between asphalt mixtures’ rutting resistance obtained in the laboratory (uniaxial repeated load test) with field observations (rutting), seeking the refinement of criteria for the laboratory test results as a function of field traffic. A database of 12 monitored test sections in Brazil was organized and the cluster statistical method was used to indicate 4 Flow Number(FN) categories. It was considered that FNsunder 100 resists only light traffic; FNsabove 100 are indicated for medium traffic; more than 300 for heavy traffic; and above 1,000 for extremely heavy traffic. It is highlighted the im-portance of monitoring test sections in Brazil, which will lead to a continuous verifica-tion and refinement of the criteria proposed in this researc