1. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Louisiana State Univ.
2. Irma Louise Rush Stewart Distinguished Professor, Dept. of Civil and Environmental Engineering, Director, Engineering Materials Characterization Research Facility, Louisiana Transportation Research Center, Louisiana State Univ., 4101 Gourrier Ave., Baton Rouge, LA 70808 (corresponding author).
3. Assistant Professor, Dept. of Civil and Environmental Engineering, Louisiana State Univ.