Shakedown analysis of unbound road pavements - an experimental point of view

摘要

Shakedown behaviour of road pavements is investigated under laboratory controlled conditions using the Sydney University Pavement Testing Facility. The Pavement Test Facility was upgraded to provide improved data acquisition, storage and analysis for the experiment. Three different unbound pavement configurations sealed with bitumen emulsion seal have been tested so far. Observed results are consistent with the pavement shakedown. Wheel loads lower than the shakedown load generated low permanent deformations for a larger number of load cycles in comparison with high permanent deformations for a lower number of load cycles for wheel loads higher than the shakedown load.