ABSTRACT
This study presents a new method to determine linear viscoelastic properties of asphalt concrete from HWD tests. The forward approach involves Spectral Element Method (SEM) to compute multi-layered pavement response under impact loading, including approximated viscoelastic behaviour for bituminous materials and dynamic effects. The optimisation is addressed in the frequency domain, taking advantage of the numerical efficiency of the SEM. This backcalculation method has been applied to several HWD tests on the flexible pavement of the STAC’s test facility for several temperatures in the bituminous course.
