Abstract
Fatigue in asphalt materials is evaluated in the laboratory through continuous cyclic loading tests, whereas field loading in pavements is intermittent. Further studies on the effect of rest periods (RPs) on asphalt binder stiffness and fatigue life is of paramount importance. This paper investigates three 50/70 penetration grade binders with respect to their stiffness and fatigue properties. Fatigue was tested at 19 °C using three strain amplitudes. Tests with recovery time (5 RPs of 4 h each) were performed. Results show stiffness recovery during rest, however such recovery is not associated with an increase in the number of cycles to failure.
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