NKK's R&D for Minimum-maintenance of Bridges

摘要

The activities which NKK has challenged since 1997 for the purpose of minimizing the life cycle cost of bridges are reviewed. The hybrid anticorrosion concept making use of the new weathering steel for coastal use, and "CUPTEN COATM", rust stabilizing surface treatment for weathering steel, is proposed, and the fundamental studies such as numerical simulation of windborne salt and so on are discussed. In addition, the outlines of Phase 1 and Phase 2 model bridges which were constructed inside NKK for execution and long term field corrosion tests are explained.