This report presents details of a Warm Mix Asphalt (WMA) Evaluation Protocol. The Protocol guides the evaluation of specific WMA technologies and processes such as additives, surfactants and foamed bitumen, and sets out the conduct of appropriate…
This report presents the results of the laboratory testing program conducted in support of the validation trial of warm mix asphalt (WMA) and hotmix asphalt (HMA) conducted in Melbourne, Australia, between 2010 and 2012. Although the intention was…
The 2011 Austroads Guide to Pavement Technology Part 5: Pavement Evaluation and Treatment Design includes an interim procedure for the thickness design of foamed bitumen stabilised (FBS) pavements. This project aimed to validate the interim…
This is the third annual report on the activities of Austroads member authorities in implementing the Austroads mix design procedure. Each road agency provided information for the report summarising their position with regard to the move to adopting…
Stone mastic asphalt (SMA) is a superior asphalt mix with proven performance. As a consequence of the aggregate skeleton, SMA has an open surface. The experience of some road agency and industry members indicates that the open surface of the SMA…
Stone Mastic Asphalt is coarser in gradation than dense graded asphalt and in emphasising the coarseness of the mix it tends to become difficult to compact in the laboratory. Five compaction methods were investigated to determine how these affected…
The report examines three aspects of stone mastic asphalt mix design. Gradation curves from Europe, US and Australia were reviewed and it was noted that with few exceptions they were relatively similar. The tolerances imposed on the mix designs were…
The primary focus of this study was to assess the stiffening effect of different filler types while using different bituminous binders. The significant influence of filler in the mastic of asphalt mixtures is well known and the effect is more…
This report presents a review of field trials of WMA technologies conducted in various countries in the world, with the emphasis on performance differences between WMA and conventional HMA and the identification of field performance data that could…
This report describes the planning and conduct of a validation trial of three warm mix asphalt surfacings (chemical additive, polymer additive, foaming) and a hotmix asphalt ‘control’ surfacing at a site in Melbourne, Australia. Issues addressed…
