1. Graduate Research Assistant, Dept. of Construction Management, Louisiana State Univ., 214B Old Forestry Bldg., Baton Rouge, LA 70803.
2. Contractors Educational Trust Fund Distinguished Professor, Dept. of Construction Management, Louisiana State Univ., 3504 Patrick Taylor Hall, Baton Rouge, LA 70803 (corresponding author).
3. Concrete Research Manager, Louisiana Transportation and Research Center, 4101 Gourrier Ave., Baton Rouge, LA 70808.
4. Professor and Graduate Program Coordinator, Dept. of Civil and Environmental Engineering, Louisiana State Univ., 3504 Patrick Taylor Hall, Baton Rouge, LA 70803.