Review of Airborne Chlorides at Seashore in Korea

摘要

For concrete structures immersed in seawater, the concentration of chloride used to estimate thechloride diffusion coefficient can be defined as the seawater chloride concentration. However, forseashore concrete structures which are not coming into direct contact with seawater, establishing theinterface concentration of chloride becomes delicate. In addition, concrete structures are greatlyaffected by salt attack primarily due to airborne chlorides like it can be seen through the corrosionof rebar.This study intends to investigate salt attack by airborne chlorides in terms of the distance from theseashore through measurements conducted at 73 spots and 27 areas during 3 year in the Eastern,Western and Southern coasts of South Korea.Results revealed great regional variations of the salinity in coastal regions with significant seasonaleffects caused by seasonal winds. Moreover, the salinity is seen to diminish as the distance from theseashore increases at a rate corresponding to the function y = ax–b.