1. Concrete Scientist, Verifi LLC, 62 Whittemore Ave., Cambridge, MA 02140; formerly, Student, Dept. of Civil, Construction and Environmental Engineering, Iowa State Univ., Town Engineering Building, Ames, IA 50011 (corresponding author).
2. Associate Director, National Concrete Pavement Technology Center, Iowa State Univ., 2711 South Loop Dr., Suite 4700, Ames, IA 50010.
3. Associate Professor, Dept. of Civil, Construction and Environmental Engineering, Iowa State Univ., Town Engineering Building, Ames, IA 50011.
4. Research Assistant Professor, Dept. of Civil, Construction and Environmental Engineering, Iowa State Univ., Town Engineering Building, Ames, IA 50011.