Estudo da evolução do dano por fadiga em misturas asfálticas

Abstract

The present study investigates the fatigue life test typically performed in Brazil to characterize asphalt mixtures. Damage evolution is interpreted by analyzing a parameter other than the number of load cycles to failure. The controlled diametral compression fatigue test was used, and the tension strainwas measured for every load cycle up until a moment prior to failure. A strain level limit ofapproximately five times the initial strain was obtained from the number of cycles versus tension strain graph for the HMA investigated, for a mixture with rubber-aggregate produced with the dry process and a mixture with rubber-aggregate produced with the wet process,this limit was approximately six times, whereas for mitures with recycled material, this limit was not contant for each stress level.