Damage analysis four-point bending fatigue tests on stone matrix asphalt using dissipated energy approaches

Abstract

Four-point bending tests under strain-controlled mode were conducted on a stone matrix asphalt. Fatigue properties were evaluated by comparing indexes and fatigue curves at different frequencies, temperatures, and strain levels. The results show the effects of temperature and strain level are more significant than that of frequency. The fatigue life is much longer under the conditions of high temperature or low strain level than those under other conditions. Stiffness ratio curve can be fitted well by the Weibull equations. The damage model expressed as a power exponential function for dissipated energy provides a reliable method for evaluating fatigue damage.