1996 Volume 7 Issue 2 Pages 9-17
In the galvanic cathodic protection of atomospherically exposed reinforced concrete structures, the backfill has been used between concrete surface and zinc anode sheets. The backfill has electrical conductivity and water reserving capacity, so that it can maintains electrical contact and suppress anodic polarization. This system has been successfully used in several structures in warm region of Japan. However, there is few data in cold region. A series of tests has been conducted including freeze and thaw test, exposure test of RC and PC beams, and application test for brige beam at seaside in Hokkaido. The current decreased markedly in cold season, but enough polarization was obtained owing to the increase of cathodic polarization resistance. These test results revealed that this system works effectively in cold environment.
