TECHNICAL REPORT 0-6925-1 TxDOT PROJECT NUMBER 0-6925 Improving the Performance-Graded Asphalt Binder Specification: Final Report Ramez Hajj Angelo Filonzi Amit Bhasin, Ph.D., P.E. November 2018; Published May 2019 http://library.ctr.utexas.edu/ctr-publications/0-6925-1.pdf