ASTM D8667-26

1.1 This test method covers the determination of parameters calculated from the measurement of modulus (G*) and phase angle (d) of asphalt binders when tested in dynamic (oscillatory) shear using parallel plate geometry in accordance with Test Method D7175. These parameters are considered important to the design of roofing binders, but will also be applicable to other paving and industrial applications that require a greater knowledge of rheological parameters relating to performance.

1.2 The values stated in SI units are to be regarded as the standard.

1.3 A precision and bias statement for this test method has not been completed at this time. Therefore, this test method should not be used for acceptance or rejection of a material for purchasing purposes.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

5.1 This test method provides a means of using rheological measurements for characterizing the hardness and relaxation properties of an asphalt binder in the high-stiffness region.