Hidenori Hamada is Professor of Kyushu University, Japan, since 2009. His has previously worked as a Senior Research Engineer, Head of Materials Division, and a member of Port and Airport Research Institute, Yokosuka, Japan. His research topics include durability of RC and PC structures under marine conditions, life extension technology of severely deteriorated RC and PC structures, and eco-friendly concrete material development such as seawater utilization in concrete production. Nobuaki Otsuki is Professor Emeritus of Tokyo Institute of Technology, Japan. He has worked as a Senior Research Engineer and Head of Materials Division at Port and Airport Research Institute, Yokosuka, Japan. His research include are durability of RC and PC structures under marine conditions, life extension technology of severely deteriorated RC and PC structures, and eco-friendly concrete material development such as seawater utilization in concrete production Takahiro Nishida is Senior Researcher of the Japanese National Institute of Maritime, Port and Aviation Technology, and Port and Airport Research Institute, Japan. He has worked for several research institutes, including port and airport, electric power industry, and highway. He has taught construction material at Tokyo Institute of Technology and Kyoto University. His research interests include durability and maintenance of civil engineering structures.
