1. Former Graduate Research Assistant, Dept. of Construction Management and Industrial Engineering, Louisiana State Univ., 3218 Patrick F. Taylor, Baton Rouge, LA 70803.
2. Assistant Professor, Dept. of Construction Management and Industrial Engineering, Louisiana State Univ., 3218 Patrick F. Taylor, Baton Rouge, LA 70803 (corresponding author).
3. Concrete Research Engineer, Louisiana Transportation Research Center, 4101 Gourrier Ave., Baton Rouge, LA 70808.
4. Dept. of Civil and Environmental Engineering, Louisiana State Univ., 3418H Patrick F. Taylor, Baton Rouge, LA 70803.
5. Assistant Professor, Dept. of Civil and Architectural Engineering, Texas A&M Univ. -Kingsville, MSC 194. 700 University Blvd., Kingsville, TX 78363.