Standard Method of Test for Determining the Flexural Creep Stiffness of Asphalt Binder Using the Bending Beam Rheometer (BBR)
This test method covers the determination of the flexural creep stiffness or compliance of asphalt binders by means of a bending beam rheometer. It is applicable to material having a stiffness value from 20 MPa to 1 GPa and can be used with unaged material or with material conditioned according to T 240 (RTFOT) or R 28 (PAV), or both. The test apparatus is designed for testing within the temperature range from –36° to 0°C. Test results are not valid for specimens of asphalt binder that deflect more than 4 mm, or less than 0.08 mm, when tested in accordance with this method.
