Abstract
The progress of the chloride induced deterioration in the superstructure of an open-type wharf is not homogeneous. The chloride ion penetration in a slab of the superstructure of an open-type wharf is also not homogeneous. It is important to reveal the influence factors on heterogeneous distribution of chloride ion penetration in order to discuss where is the critical inspection points or areas in an open-type wharf.
The aim of this study is to reveal the factors underlying heterogeneous chloride ion penetration into concrete. The chloride ion contents of two slabs obtained from an open-type wharf that was about 30 years old were measured. The average chloride ion contents of each measurement depth from the surface of concrete in two slabs differed greatly. From the distributions of chloride ion content in each measurement depth in two slabs, it was found that the chloride ion contents at the land side of each slab was relatively higher than that at the middle and sea-side of the slabs.
In conclusion, it was found that the distribution of the chloride ion penetration was affected by factors including the location of the slab, the environmental conditions such as the sea level, and the other structural members surrounding the slab.
