ABSTRACT
Table 3 lists the tested structures and Fig.11 shows the typical anode configurations used in the tests. At a part of area to be protected on each structure, the potential of the rebar and the flowing current were set to be easily monitored and measured at a specified interval. (The measurement for structure D is in progress.)
Structures Construction date
Application date of CP
Area subjected to CP (surface area of concrete)
Results
Figs. 12 and 13 show anode current densities varying and rebar polarization varying with the passage of time (months), respectively. Just like the test piece, all structures were provided with a satisfactory protective current with a rebar polarization of -100 mV or more, and thus, they are estimated to have been subjected to effective cathodic protection. (Measurements were made in relation to the Hg/HgO reference electrode embedded along the rebar.) The varying anode current with different seasons may be attributed to different climates and other varying environmental conditions.
