| 摘要 |
PURPOSE:To make it possible to simplify the fitting of an anode for the electric protection of a reinforced concrete structure by wrapping a powdery or granular backfill compsn. with a water permeable sheet and molding the wrapped compsn. into a sheet shape. CONSTITUTION:A powdery or granular backfill compsn. 2a is obtd. by mixing bentonite, gypsum, sodium sulfate, etc., as principal components with the carbonate, phosphate, chloride, etc., of a metal and a water absorbing polymer is added to the compsn. 2a as required. The compsn. 2a is wrapped with a bag shaped water absorbing sheet 3a, 3b in 5-10mm thickness and quilting 4 is carried out at 50-100mm intervals in the longitudinal and transverse directions to obtain a backfill 1a for electric protection. This backfill 1a is superposed on an anode combined body 8 obtd. by adhering an anode plate 5 to a support plate 6 with a rubber-asphalt sheet 7 for adhesion on both sides and they are integrated. |
