AASHTO T 313-08


Standard Method of Test for Determining the Flexural Creep Stiffness of Asphalt Binder Using the Bending Beam Rheometer (BBR)
standard by American Association of State and Highway Transportation Officials, 08/01/2008

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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 flexural stiffness value from 20 MPa to 1 GPa and can be used with unaged material or with material aged using T 240 (RTFOT) and/or R 28 (PAV). The test apparatus is designed for testing within the temperature range from -36 to 0°C.

Test results are not valid for beams of asphalt binder that deflect more than 4 mm, or less than 0.08 mm, when tested in accordance with this method.

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