Abstract
AbstractIn this paper an energy-based approach has been proposed based on the principals of nonlinear viscoelastic fracture mechanics to determine the thermal fatigue life of asphalt mixes for the short-term aging condition at a constant temperature. The approach, presented in this paper for only one aging condition at one temperature, is considered in another paper as the basis for the development of a comprehensive model (TFCMODEL) by which the thermal fatigue life of various asphalt mixes may be predicted analytically for varying aging conditions and temperatures. To this end, a modified uniaxial test setup was designed to account for the effects of the bonding/friction condition between asphalt and base layers, and nonuniform distribution of stresses/strains within the asphalt layer depth. To characterize the thermal fatigue behavior of asphalt mixes, uniaxial thermal fatigue tests were carried out on the beam specimens at two aggregate gradations, two binder contents, two air void contents, one aging...
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