The recently constructed Centre for Pavement and Transportation Technology (CPATT) test track, located at the University of Waterloo provides a readily accessible, safe, and relatively uniform location for determining the seasonal variations of the modulus of resilience (Mr) in the unbound layers. The road consists of five different asphalt mix test sections, each approximately 140 m in length constructed over dense graded granular base and a predominantly clay subgrade. In the Fall of 2003, CPATT in collaboration with ARA began a non-destructive deflection testing program to complete pavement load/deflection testing and data analysis of the test track at regular intervals. The primary objective of this work is to compile a database of seasonal variations to the Mr of the unbound layers, which could subsequently be used in the ME PDG calibration. This paper outlines the testing program used to collect the pavement load/deflection data and presents the test results collected to-date. For the covering abstract of this conference see ITRD number E211426.
Abstract