1. Assistant Professor, Dept. of Civil and Environmental Engineering, Louisiana State Univ. and Southern Univ., Baton Rouge, LA 70803.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Texas at Arlington, Arlington, TX 76019.
3. Assistant Professor, Dept. of Civil Engineering, Louisiana Tech Univ., Ruston, LA 71272.
4. Professor, Dept. of Civil and Environmental Engineering, Louisiana State Univ. and Southern Univ., Baton Rouge, LA 70803.
5. Materials Research Administrator, Louisiana Transportation Research Center, Baton Rouge, LA 70803.