Abstract
A range of binder test results for Strategic Highway Research Program (SHRP) Materials Reference Library asphalts were used to identify critical low-temperature behavior. Test results were obtained from in-house testing, Minnesota Department of Transportation (Mn/DOT) testing, and previously reported SHRP research reports. Tests used were the Fraass brittle point, bending beam, a dynamic shear rheometer (DSR), and differential scanning calorimetry (DSC) glass transition temperature. A good correlation between the Fraass brittle point and the bending beam rheometer limiting stiffness indicated that the Fraass brittle point represented the behavior of a binder at a stiffness of approximately 200 MPa. Because the traditional method of using the DSR to obtain the glass transition temperature, Tg from the peak of the loss modulus curve did not provide sufficiently specific results, the temperature at which a minimum phase angle was used to define the Tg instead. These results showed a good correlation with the...
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