1. Graduate Student, Dept. of Civil and Environmental Engineering, Washington State Univ., Spokane St., Sloan Hall, Pullman, WA 99164-2910.
2. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Washington State Univ., Spokane St., Sloan Hall, Pullman, WA 99164-2910.
3. Associate Professor, Dept. of Civil and Environmental Engineering, Washington State Univ., P.O. Box 642910, Spokane St., Sloan Hall 41, Pullman, WA 99164-2910 (corresponding author).
4. Eastern Region Materials Engineer, Washington State Dept. of Transportation, 2714 N Mayfair St., Spokane, WA 99207.
5. Assistant Region Materials Engineer, Eastern Region, Washington State Dept. of Transportation, 2714 N Mayfair St., Spokane, WA 99207.
6. Professor and Chair, Dept. of Civil and Environmental Engineering, Washington State Univ., Spokane St., Sloan Hall, Pullman, WA 99164-2910.