Influência das propriedades de forma da fração graúda do agregado no controle da deformação permanente de misturas asfálticas densas

Rutting is a common type of distress in asphalt pavements. This is more evident for warm regions and heavy traffic.  The locking of the aggregate skeleton associated with the binder content contributes to increasing the stability of the asphalt mixture. The objective of the Bailey method, evaluated secondarily in this study, is to ensure aggregate interlock and good aggregate packing, giving resistance to permanent deformation. The purpose of this study was to evaluate the influence of the type and the shape properties of the aggregates (coarse fraction) in the control of the permanent deformation of dense asphalt mixtures. The asphalt binder used in this study was a neat binder classified by penetration (50/70 PEN). The aggregates used are: (i) one from granitic source and (ii) one gravel (crushed and not crushed). It was found that LCPC wheel tracking test results pointed out that the asphalt mix resistance to rutting depends on the aggregate source, especially its shape.