1. Ph.D. Candidate, Dept. of Civil Engineering, King Saud Univ., P.O. Box 800, Riyadh, Kingdom of Saudi Arabia 11421.
2. Associate Professor, Center of Excellence for Concrete Research and Testing, Dept. of Civil Engineering, King Saud Univ., P.O. Box 800, Riyadh, Kingdom of Saudi Arabia 11421 (corresponding author).
3. Professor, Dept. of Civil Engineering, King Saud Univ., P.O. Box 800, Riyadh, Kingdom of Saudi Arabia 11421.