Characterization of ductility of field-aged petroleum asphalt

摘要

This study evaluated the ductility properties of sixty-nine different types of asphalt extracted from the field projects using dynamic shear rheometer (DSR) monotonic and oscillation test. These extracted asphalts were subjected to field aging. The ductility of asphalt mixture was also characterized by indirect tensile test. It was found that test temperature had effect on property measurement. Failure strain measured at 5 degrees C from monotonic test correlated well with DSR function measured from oscillation test. Both higher failure strain and lower DSR function indicated a better ductility of asphalt, and were also indicative of ductility of asphalt mixture. Failure strain would be potentially used to separate polymer-modified asphalt from non-polymer-modified asphalt.