| In 20th century, a large number of highway bridge concrete decks in U.S. suffered from corrosion due to deicing salt, but those in Japan suffered from fatigue due to cyclic loading of heavy trucks. Lately, significant corrosion of concrete decks due to deicing salt have been reported in Japan, giving rise to further concerns about combined deterioration from fatigue and corrosion in existing bridge decks designed according to old specifications. This paper provides chloride profiles in concrete decks surfaced with asphalt mixtures, which is one of reasons concerning a significant difference in deterioration between both countries. Additionally, with regard to mechanisms of fatigue deterioration of concrete decks, a current result obtained from the truck wheel traveling tests is presented. |
