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View larger AASHTO T 313-12 (R2016)
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AASHTO T 313-12 (R2016) 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, 2012
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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 (creep compliance values in the range of 50 nPa-1 to 1 nPa-1) and can be used with unaged material or with material aged using T240 (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 beams of asphalt binder that deflect more than 4mm, or less than 0.08 mm, when tested in accorance with this method.