2025 Volume 78 Issue 1 Pages 254-262
Exogenous chloride attack due to airborne chloride is one of the main degradation factors for reinforced concrete structures located in coastal areas. The amount of airborne chloride adhered to the structure is affected by wind and rain. Therefore, it is known that the amount of airborne chloride adhered to each structural component is different. In this study, airborne chloride on the pillars of reinforced concrete structures in a coastal area was therefore measured. In addition, tests using water-sensitive paper were carried out to assess the rain exposure of each pillar. Furthermore, wind analysis was carried out considering the topography around the structures. The results of the wind analysis obtained were used to analyse the rain exposure and airborne chloride particles. The validity of the analyses in this study was then assessed by comparing the results of the analyses with the results of the exposure tests. The influence of the analysis model, the minimum mesh size of the wind velocity field in the analysis and the number of airborne chloride particles on the analysis values was also investigated. The results showed that the analysed values approximately captured the trend of the measured values by taking rainfall into account. The number of airborne chloride particles had little impact on the analysis results, and the smallest mesh size in the wind analysis affected the errors in the analysis results.
