Publications

The temperature sensitivity (K factor) of the ball penetration test is an important parameter in estimating the embedment allowance of the overlaying seal design. A series of ball penetration tests were performed in the laboratory to investigate the…

An Austroads national workshop on stone mastic asphalt (SMA) was held to resolve differences in requirements for SMA in different parts of Australasia. Delegates decided that two mix types were required to cover the desired range of properties.…

This report reviewed various approaches to produce warm mix asphalt (WMA) and their laboratory and field assessments. Reviewed technologies are the foamed mix based products (Aspha-Min, WAM-Foam and LEA), organic additive products (Sasobit,…

A road trial consisting of five different asphalt sections was placed in Brisbane to examine the relationship between rutting in-service and the laboratory wheel tracking test. The trial was placed at the Brisbane City Council quarry at Mount Coot-…

This report provides a general overview of polyphosphoric acid modified binder. A modification mechanism between the acid and binder was proposed. The addition of acid was found to change the chemical compositions of the binder noticeably. The…

This report presents a laboratory assessment of a warm mix produced using an organic additive (Sasobit wax). Three different types of mixes (control, Sasobit dry and Sasobit pre-blend) were produced at various mixing and compaction temperatures…

This report reviews the tools that monitor, measure and evaluate the performance of the road network, for both arterials and freeways. The interest in measurement and evaluation tools for the overall network is mainly driven by the need to operate…

Background information is given on the durability test procedure and the road trial program which validated the test. The durability test result gives an indication of the long term rate of hardening of a bitumen in field service. Durability results…

This Austroads project was initiated to enable road authorities to develop a better understanding of how various traffic management tools and proposed operational changes to the road network affected the performance of the entire road network, with…

Integrated tools can be a toolbox of technologies and procedures which combine both hard engineering methods such as the use of shoulders and lane access controls as well as dynamic traffic management tools such as ramp meters, incident detection,…