The development of mechanistic-empirical permanent deformation design models for unbound pavement materials from laboratory and accelerated pavement test data

摘要

Unbound pavement base layers may deform gradually under repeated loading or rapidly in shear failure under a limited number of load applications. A conceptual, empirical permanent deformation model, accommodating both failure mechanisms is formulated. The model is calibrated using static and dynamic triaxial laboratory test results for a crushed stone, waterbound macadam and clinker ash material including the effects of density and saturation. Results from the calibrated laboratory models agree well with full-scale Heavy Vehicle Simulator results.