![]() ![]() ![]() Zahn Cup Method: Measures by observing the time it takes the volume of liquid to empty the cup though a small hole in the bottom of a container/cups. It applies to materials with viscosities in the range of 0. Falling Sphere Viscometer: Measures the viscosity by dropping a sphere of a specific weight & density and measures the time it takes the sphere to reach designated junctures. This test method covers the procedures for determining the apparent viscosity of the bituminous binder by capillary viscometers under vacuum at 60☌. The results of this test method can be used to calculate the viscosity when the density of the test material at the test temperature is known or can be determined.ĪSTM D2171 – Viscosity at 60☌ characterizes flow behavior (dynamic) and can be used for specification requirements for cutback asphalt and bituminous binders. This test method covers the procedures for determining the kinematic viscosity of liquid bitumens, road oils and distillation residues all at 60☌ and liquid bituminous binders at 135☌ in the range of 6 to 100,000 mm²/s. Specifications are generally at temperatures of 60 and 135☌. The method is used to determine the consistency of liquid bitumen as a determining factor in establishing consistency in shipments or sources of supply. ASTM D21710 – Kinematic viscosity characterizes flow behavior.
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