1. Department of Civil Engineering and Environmental Sciences, Korea Military Academy, P.O. Box 77-3, 574 Hwarang-ro Nowon-gu, Seoul, South Korea 01805.
2. Engineering School of Sustainable Infrastructure and Environment, University of Florida, 365 Weil Hall P.O. Box 116580 Gainesville, Fla. 32611, USA.
3. Florida Department of Transportation, State Materials Office, 5007 NE 39th Avenue, Gainesville, Fla. 32609, USA.