Abstract
Corrosion-induced damages have occurred on the reinforced-concrete members (i.e., slabs and beams) being located underneath the superstructures of Fujimi quaywall No. 5 at Shimizu port, which is an open-type wharf with vertical piles and has elapsed 20 and several years after construction. To stop corrosion of reinforcing steel in the salt-contaminated members, the application of cathodic protection (galvanic anode system) commenced in December 1989 and was complete in March 1990. In the system, zinc plates were used as galvanic anodes with the conductive paste. The works were undertaken without any disruptions to cargo operations and without any constructional troubles. The protection criterion of 100 mV potential shift has applied to the system; this potential shift is achieved at current levels in the range of 10 to 20 mA/m2 of concrete area. The paper is the first full-scale, nontrial application of cathodic protection to the salt-contaminated concrete structures under marine environments in Japan.
