Abstract
In this study, both the amount of airborne chlorine and the chloride ingress into concrete were measured for the bridge on the coast in the Sea of Japan. From the results, it has been found that the amount of airborne chlorine has a good correlation with the calculated energy value of waves at the bridge, and that the surface chloride content (Co) indicating the degree of saline environment can be determined based on both the distance from the seashore and the height of structure. Also, it is clarified that the diffusion coefficient for chloride ions (Dc) is not a constant value for the concrete with the same water to cement ratio, which varies depending on the value of Co. Furthermore, the method estimating the chloride ingress into concrete in the bridge was proposed.
