ASTM D2171 & IP319
The ASTM D2171, IP 222, ISO 12596, and AASHTOT 202 test methods cover procedures for the determination of viscosity of asphalt binder (bitumen) by vacuum capillary viscometers at 60°C [140°F]. It is applicable to materials having viscosities in the range from 0.0036 to over 20 000 Pa · s [0.036 to over 200 000 P].