2024 Volume 65 Issue 3 Pages 162-169
The effect of water and carbonation on the corrosion of reinforcing bars in concrete was investigated by field surveys on members with different levels of supplied water. In addition, a design method to suppress corrosion of reinforcing bars due to water penetration was verified by comparing the cover depth where spalling of concrete occurred and the design cover depth determined by taking carbonation into account. Even if the un-carbonation depth (= cover depth―carbonation depth) is less than 10 mm, when water is not supplied, the probability of spalling is lower and the corrosion rate of reinforcing bars is slower, so it is important to consider the effect of supplied water on corrosion of reinforcing bars. It was also confirmed that the design method based on corrosion of reinforcing bars due to water penetration is applicable.
