COMPARATIVE STUDY OF PREDICTION PARAMETERS OF THE SALINITY DIFFUSION OF EACH OFFSHORE AREA USING SURVEY DATA OF COASTAL CONCRETE STRUCTURES IN COLD AND SNOWY AREAS

The deterioration of reinforced concrete structures may lead to their destruction. Therefore, it is required to accurately predict the deterioration due to salt damage for maintenance and management. In particular, for the cold and snowy coastal areas suffering from the harsh environment, it is important to evaluate and verify methods using conventional salinity diffusion prediction parameters. For this study, frost damage and sea-ice wear were selected as deterioration phenomena that should be considered together with salt damage for the cold and snowy Hokkaido coast. Moreover, it was confirmed before the study that the calculation of three salinity diffusion prediction parameters is appropriate in general, and it was surmised that a combination indicators with due consideration of the durability in Hokkaido is related to differences from the Mainland of Japan. Furthermore, it is reported that, at a practical level, it is possible to predict the deterioration with almost no issues using the salinity diffusion prediction parameters calculated according to a conventional procedure not depending on the offshore area.