Effects of Protective Methods Against Salt Damage for New Prestressed Concrete Bridge

Abstract

This report documents a survey conducted for the purpose of evaluating the concrete protection effects of chloride attack measures applied to a new prestressed concrete bridge located in a chloride attack environment. The chloride attack measures which consisted of (1) applying a concrete protection lining, and (2) installing waterproofing panels, were performed on different girders of the same bridge, respectively. Then, roughly twelve years after the time of construction, the protection effects of each method were evaluated based on appearance, chloride content and chipping surveys. Both methods were found to have sufficient barrier effects against the ingress of corrosive factors into the concrete from the outside.