1. The Univ. of Texas at Austin, Wisconsin Dept. of Transportation, Madison, Wisconsin, Madison, WI, 53707-7910;
2. Currently at: Transportation and Public Works Department, City of Fort Worth, 5000 Martin Luther King Jr Fwy, Fort Worth TX 76119, US e-mail: zelab2001@yahoo.com
3. 301 E Dean Keeton Stop C1761, ECJ Building, The Univ. of Texas at Austin, Austin, TX 78712 (Corresponding Author), US e-mail: nazmus.sakib.ce@gmail.com
4. 301 E Dean Keeton Stop C1761, ECJ Building, The Univ. of Texas at Austin, Austin, TX 78712, US e-mail: a-bhasin@mail.utexas.edu
5. Asphalt and Chemical Branch, Texas Dept. of Transportation, Asphalt and Chemical Branch, Austin, TX, 78701-2483, US e-mail: Jerry.Peterson@txdot.gov