Viscosity based specifications refer to the
dynamic viscosity of bitumen at 60°C. India
and Australia are the two main countries that
use viscosity based specifications as shown
below:
Australian Viscosity Specification
The fundamental properties of Australian
specifications are:
• Viscosity at 60°C and 135°C
• Density at 15°C
• Viscosity at 60°C post RTFOT
