Pavement

In Australia and New Zealand, bituminous binders used in road construction are tested prior to use to ensure they will perform satisfactorily during road construction and maintenance. Australian Standards Committee CH-025 ‘Bitumen and related products for roadmaking’ is responsible for the revision of 4 national specification documents and 26 associated test methods which are used to characterise bituminous materials used in road construction. Some of these Australian Standards have not been updated for more than 20 years.

The webinar provides an overview of an Austroads project which provided expert technical input into the revision of three Australian Standard test methods (AS 2341.4, AS 2341.15 and AS 2341.27) and three national specification documents (AS 2008, AS 2157, AS 1160) during the period between September 2022 and August 2024. It also includes the results of a laboratory study which investigated whether consistency at 25 °C tests (AS 2341.25) could be replaced by rotational viscosity at 25 °C tests (AS 2341.4) in the bituminous emulsion specification (AS 1160).

The webinar covers the following topics:

• The process used to update an Australian Standard
• The main changes to the three test methods and proposed changes to the three national specification documents
• The results of laboratory studies which determined whether consistency at 25 °C tests could be replaced by rotational viscosity at 25 °C tests in the bituminous emulsion specification.

This webinar is presented by Dr Robert Urquhart.