An extensive laboratory study was undertaken to support the Queensland Accelerated Loading Facility (ALF) asphalt deformation trial. The work focussed on three main areas: (a) determination of whether the dynamic creep test indicated the rut resistance of asphalt mixes under traffic, (b) the establishement of relationships between laboratory binder properties and the rut resistance of polymer modified binder (PMB) asphalts, and (c) the collection of information to assist in the development and implementation of a new Australian asphalt mix design procedure. There were indications that the dynamic creep test suffered from a number of serious deficiencies which might be related to the lack of confinement of specimens during testing. A possible alternative means of prediciting asphalt deformation in the field wheel tracking which correlated well with ALF deformation results. (A)
Abstract