1. Assistant Professor, Dept. of Structural Engineering, Magnel Laboratory for Concrete Research, Ghent Univ., Technologiepark-Zwijnaarde 904, B-9052 Ghent, Belgium.
2. Professor, Dept. of Civil and Environmental Engineering, Univ. of Alabama in Huntsville, Huntsville, AL 35899.
3. Professor and Director, Magnel Laboratory for Concrete Research, Ghent Univ., Technologiepark-Zwijnaarde 904, B-9052 Ghent, Belgium.