Cathodic Protection for Life Extension of Existing Reinforced Concrete Bridge Elements (2009) / Chapter Skim
Currently Skimming:
Pages 42-44
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 42... ...
Only 10 slotted bridge deck systems have asphalt overlay; all others have a concrete overlay. The cathodic protection systems on the bridge decks prevent corrosion of the embedded reinforcement and its electric field also forces the chloride ions to migrate away from the reinforcement toward the positive anode material, thereby reducing the chloride ion content in the deck concrete.
|
From page 43... ...
Although the conductive paints may have a shorter service life, especially when exposed to the elements, it is fairly inexpensive to reapply the paint and extend the remaining service life. GALVANIC CATHODIC PROTECTION SYSTEM There is a tendency for many agencies to use the galvanic cathodic protection systems because they do not need the level of monitoring and maintenance that impressed current cathodic protection systems require.
|
From page 44... ...
The Seven Mile Bridge has epoxy-coated rebar and the cathodic protection system was installed to provide protection to the epoxy-coated rebar. Over the last five years, Ontario has increasingly used arc sprayed zinc and the aluminum–zinc–indium alloy as cathodic protection anodes on piers, girders, and caps and their monitoring data indicate good performance to date.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.