Austroads: Transport Research and Trends

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Maximising the Use of Sustainable Rehabilitation Treatments

March 10, 2022

This webinar, presented by Dr Negin Zhalehjoo, Andrew Papacostas and Dr Didier Bodin, focuses on the outcomes of an Austroads research project “Laboratory Fatigue Characterisation of Foamed Bitumen Stabilised (FBS) Materials”. The objective of this project was to develop a laboratory fatigue relationship to predict the performance of FBS materials to be used for future pavement design of FBS materials. Extensive laboratory experiments were undertaken during the project, including indirect tensile testing and flexural testing on laboratory prepared and cured FBS specimens.

The webinar covers the following key topics:

  • A summary of the testing program and procedures to measure and analyse the fatigue life of FBS specimens.
  • The results of indirect tensile testing and flexural testing to determine the modulus, strength, and fatigue characteristics of FBS materials.
  • The development of a new laboratory fatigue relationship for FBS materials as well as the discussion on the potential link between the fatigue performance of the FBS mixes and the mix properties.
  • The comparison between the fatigue life predictions from the Shell asphalt laboratory fatigue relationship against the predictions using the developed presumptive fatigue relationship in this project.