As the use of de-icer on expressway is increased, scaling resistance on pavement surfaces due to freezing-thawing is decreased. In this study, scaling test methods and specifications for concrete is investigated to evaluate freezing-thawing resistance of concrete.

Marine bridges are deteriorated due to the exposure under marine environment. The structure deterioration occurred by corrosion of steel in concrete is mainly relevant to chloride in seawater. The cathodic protection technique is an unique measurement to stop the corrosion of steel. In this study, the detail maintenance strategy of cathodic protection system in KEC's experience is introduced.