Fatigue Life Analysis of Asphalt Mixture Coupling with Loading Intermittent Time

Abstract:

Repeated loading will produce cumulative damage to asphalt concrete, because of 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 second intermittent time is a key time point to fatigue process ,fatigue rate under 15 °C is slower than that under 20 °C,and introducing the effect factor to the fatigue equation.

• Periodical: Applied Mechanics and Materials (Volumes 204-208)
• Pages: 3852-3858
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.204-208.3852
• Online since: October 2012
• Authors: Li Qiang Luan, Xiao Ge Tian
• Keywords: Asphalt Mixture (AC), Fatigue Equation, Fatigue Life, Intermittent Time

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