Fatigue Life Analysis of Asphalt Mixture Coupling with Loading Intermittent Time

Repeated loading will produce cumulative damage to asphalt concrete, becauseof the visco-elastic property of asphalt concrete, a certain degree of self-healing may occurred in case the loads being taken away.( the healing effect is more obvious under higher temperature or pressure),this process can be indicated through adding the intermittent time factor to fatigue test of asphalt concrete.This study adds intermittent time factor to asphalt concrete fatigue testing through universal testing machine deeply analyzing the effect of intermittent time, confirming that 0.5 secondintermittent time is a key time point tofatigue process,fatigue rate under 15 degrees Cis slower than that under 20 degrees C,and introducing the effect factor to the fatigue equation.