1. Professor, Dept. of Regional Infrastructures Engineering, Kangwon National Univ., Chun Cheon 200-701, Korea.
2. Senior Researcher, Center for Advanced Mineral Aggregate Composites, Kangwon National Univ., Chun Cheon 200-701, Korea.
3. Professor, Dept. of Civil Engineering, Clemson Univ., Clemson, SC 29634-0911.