ASTM D2170/D2170M-18 PDF Download

The ASTM D2170/D2170M-18 standard is titled "Standard Test Method for Kinematic Viscosity of Asphalts." It specifies procedures for determining the kinematic viscosity of liquid asphalts, road oils, and distillation residues of liquid asphalts at 60 °C and liquid asphalt binders at 135 °C. The test method is used to assess the flow behavior and consistency of liquid asphalt, ensuring uniformity of shipments or sources of supply.

The standard emphasizes that the quality of results depends on the competence of the personnel performing the procedure and the calibration and maintenance of the equipment used. While compliance with Specification D3666 is recommended, it's important to note that it alone does not guarantee reliable results. Other factors also influence the accuracy of the test.

The test method can be used at other temperatures and lower kinematic viscosities, but the precision is based on determinations at 60 °C for liquid asphalts, road oils, and 135 °C for asphalt binders within the viscosity range of 30 to 6000 mm²/s. The standard also highlights that modified asphalt binders or conditioned/recovered asphalt binders may exhibit non-Newtonian behavior, which could affect the shear rate determination and invalidate the results obtained using this method.

Additionally, the standard provides a warning regarding the handling of mercury, which is sometimes used in the test. Mercury is considered a hazardous material and users should take appropriate precautions. The standard also includes a note stating that the references to notes and footnotes in the document are for explanatory purposes and should not be considered mandatory requirements.