ABSTRACT
ABSTRACT: Water existing in the asphalt concrete has become the main factor which significantly influences the mechanical properties and service life of the asphalt pavement. A multiphase composite material model is developed for the viscoelastic saturated asphalt concrete, and elastic modulus, secant modulus and effective complex modulus are derived applying viscoelastic theory and micromechanics methods under the Burgers model of the asphalt concrete. The effect of porewater pressure on the porosity and the effective modulus are studied under Sine function and pulse wave traffic loads. The excess pore-water pressure of asphalt pavement is suggested as a major reason of water damage in pavement.
