The research conducted in this paper focused on developing the master curves for Brisbane City Councils asphalt mix B771. An investigation into the laboratory compaction methodology for sample preparation and modulus testing and the associated impacts on the master curve were undertaken. Four common laboratory compacting devices used in Australia were assessed, under a range of temperatures and frequency to produce master curves representing the resulting asphalts performance characteristics for the compaction methodology. The mixture selected, B771, is produced at the Brisbane City Councils, Eagle Farm plant and consists of 15% Reclaimed Asphalt Product (RAP) as an aggregate substitute within the mix. Encountered variances during modulus testing, did not affect the predictive capabilities of the master curves, as all the compaction methods produced master curves, which behaved relatively similar at the intermediate temperatures of 20-30°C. This allowed the pavements average in-service modulus |E*| to be predicted as approximately 6700MPa for a typical Sunshine Coast road condition of 30°C and vehicle traffic of 45km/hr. The catalogue provides a better understanding of B771s characteristics and compliance capabilities with the new mechanistic pavement design.
16th Australian Asphalt Pavement Association (AAPA) International Flexible Pavements Conference: Innovation Driving Value, Gold Coast, Australia 13-16 September 2015