Viscosity Grade

Viscosity Grade

Bitumen is classified based on its absolute viscosity at 60 °C or its kinematic viscosity at 135 °C. The standard unit of measurement for dynamic viscosity is the poise, whereas kinematic viscosity is expressed in centi-Stokes. The purity grading of bitumen adheres to the AASHTO M226 and ASTM D3381 standards. For detailed testing procedures and criteria, please refer to Tables 1-1 to 1-6.

Viscosity Grades
viscosity
Table 1-2: Technical Specification of Pure Bitumen Based on Viscosity at 60 °C (AASHTO-M226)
viscosity-3
Table 1-3: Technical Specification of Pure Bitumen Based on Viscosity at 60 °C (AASHTO-M226)
viscosity-4
Table 1-4: Technical Specification of Pure Bitumen Based on Viscosity at 60 °C (AASHTO-M226)
viscosity-5
Table 1-5: Technical Specification of Pure Bitumen Based on Viscosity at 60 °C (AASHTO-M226)
viscosity-6
Table 1-6: Technical Specification of Pure Bitumen Based on Viscosity at 60 °C (AASHTO-M226)

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