Abstract
For about 10 years since the mid-1960s, a number of concrete structures were constructed with sea sands from which salt was not sufficiently removed. To establish an appropriate method to maintain these structures, the authors first investigated the results of previous researches to re-evaluated the rebar corrosion rate due to initially-induced chlorides, and then carried out a 5-year exposure test by using a comparatively large-scale specimen. Base on the test and study results, the authors created a formula to calculate the rebar corrosion rate in consideration of cover depth, initially-induced chloride content and water-cement ratio.
