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…

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…

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…

The objective of this report is to provide data relating the laboratory repeated load triaxial test (RLT) results to field performance and to develop procedures for incorporation of RLT test results into performance-based specifications and…

This report presents the summary of project activities conducted in 2005/06. A number of suitable sealed granular pavement sites were identified across Australia for inclusion in the LTPP study. Interim WE models were developed. An improved revised…

The report describes the testing associated with the production of a database of the physical properties of selected Australian bitumens manufactured between 1956 and 2004. The properties are tabulated in an Appendix. In a series of graphs different…