In order to investigate the mechanical behavior of epoxy asphalt mixture under cyclic traffic loading,cylindrical samples of the epoxy asphalt mixture were subjected to cyclic loading-unloading tests under varying confining pressures.The accumulation and dissipation of energy were observed in the energy evolutions.It turns out that the epoxy asphalt mixture exhibits elastic-plastic property in the first few cycles,and then the elastic property would be strengthened gradually in the cyclic loading tests.Applying a moderate confining pressure would significantly reduce the dissipated energy.The proportion of dissipated energy is about 25% from the unconfined test,and less than 15% from the confined test.As a result,more’energy would be required if to produce equal permanent deformation under higher confining pressures.Therefore,a moderate increase in the confining pressure would be helpful in restraining permanent deformation,such as rutting.
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