Accelerated load testing in the laboratory has been done on heavy duty asphalt mixes in Australia and the Middle East. The mixes covered a range of asphalts including Australian and overseas airport mix designs and a wide range of existing and new Australian viscosity and overseas penetration binders, and modified binders. Testing was done using the Model Mobile Load Simulator Mk3 (MMLS) and the Cooper wheel tracking machine used in Australia. The MMLS testing is scale testing and the laboratory rutting can be scaled to actual field rut performance. A fundamental analysis of the rutting performance of some mixes was done with due regard to actual aircraft type and loading, lateral wander, climatic conditions, tyre pressure and layer thicknesses. Results from the field showed a good correlation. The method has application for the design of new heavy duty asphalt mixes intended for high loads in hot climates. (a) For the covering entry of this conference, please see ITRD abstract no. E217099.
Samenvatting