Cathodic Protection for Life Extension of Existing Reinforced Concrete Bridge Elements (2009) / Chapter Skim
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Pages 14-23
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From page 14... ...
As the coke breeze mix did not have the requisite material properties to serve as the riding surface, an overlay of asphalt was placed on top of the coke breeze. Based on the initial success at the Sly Park Bridge, Caltrans installed seven more asphalt–coke breeze overlay cathodic protection systems during 1974 and 1975.
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From page 15... ...
With the development of the FHWA conductive polymer grout, the number of bridges increased to more than 100 by 1989 (16)
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Unlike the conductive paints, the zinc coating is comparable in color to concrete and requires no decorative overcoat. The second largest application of arc sprayed zinc is the Yaquina Bay Bridge in Oregon (37)
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From page 17... ...
The mixed metal oxide anode was developed in 1985 and has been used on both bridge decks and substructure elements. FIGURE 17 Yaquina Bay Bridge, Newport, Oregon, has the largest arc-sprayed zinc-impressed current cathodic protection system.
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From page 18... ...
, and American Road and Transportation Builders Association (ARTBA) started the Guide Specification for Cathodic Protection of Concrete Bridge Decks in 1989, DP-34 ended.
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From page 19... ...
The difference in the numbers may be accounted for by cathodic protection systems that have been decommissioned, have failed, or the bridge decks have been replaced. For the state of New Jersey, the NBI database has 22 bridges with a deck cathodic protection system; however, the survey response lists no bridges with cathodic protection systems.
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From page 20... ...
State/Province State Code Responded to Survey NBI Reported Total Deck Superstructure Caps Columns Piles Footers Alabama AL No 0 Alaska AK No 2 Arizona AZ Yes 0 1 0 0 0 0 0 0 Arkansas AR Yes 0 0 0 0 0 0 0 0 California CA Yes 6 20 12 1 0 6 1 1 Colorado CO Yes 13 6 6 0 0 1 0 0 Connecticut CT Yes 12 13 12 1 Delaware DE No 1 District of Columbia DC No 0 Florida FL Yes 1 71 3 5 6 10 50 10 Georgia GA No 0 Hawaii HI Yes 0 0 0 0 0 0 0 0 Idaho ID No 2 Illinois IL Yes 25 15 8 3 2 1 1 0 Indiana IN Yes 20 15 15 0 0 0 0 0 Iowa IA Yes 13 6 3 2 0 1 0 0 Kansas KS No 5 Kentucky KY No 0 Louisiana LA No 0 Maine ME No 1 Maryland MD Yes 13 15 14 0 0 1 0 0 Massachusetts MA No 3 Michigan MI No 5 Minnesota MN No 1 Mississippi MS Yes 1 0 0 0 0 0 0 0 Missouri MO Yes 129 167 161 0 0 2 0 0 Montana MT Yes 1 0 0 0 0 0 0 0 Nebraska NE No 8 Nevada NV No 0 New Hampshire NH No 2 TABLE 1 NUMBER OF CATHODIC PROTECTION SYSTEMS IN EACH STATE OR PROVINCE (continued )
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From page 21... ...
TABLE 1 (continued ) New Jersey NJ Yes 22 0 0 0 0 0 0 0 New Mexico NM Yes 1 0 0 0 0 0 0 0 New York NY Yes 2 4 3 0 0 1 0 0 North Carolina NC Yes 0 3 0 0 2 2 1 2 North Dakota ND Yes 0 0 0 0 0 0 0 0 Ohio OH Yes 29 Oklahoma OK Yes 2 0 2 0 5 15 0 0 Oregon OR Yes 8 11 9 11 9 7 0 0 Pennsylvania PA Yes 12 11 11 0 0 1 0 0 Puerto Rico PR No 0 Rhode Island RI No 0 South Carolina SC Yes 0 0 0 0 0 0 0 0 South Dakota SD Yes 3 12 8 0 3 1 0 0 Tennessee TN Yes 7 0 0 0 0 0 0 0 Texas TX Yes 8 1 1 4 5 5 3 2 Utah UT Yes 0 2 2 0 0 0 0 0 Vermont VT Yes 0 1 0 0 1 1 0 0 Virginia VA Yes 6 12 7 0 4 7 1 0 Washington WA Yes 3 3 2 1 0 0 0 0 West Virginia WV No 4 Wisconsin WI No 3 Wyoming WY Yes 1 0 0 0 0 0 0 0 Prince Edward Island, Canada PEI-CA 2 1 1 1 New Brunswick, Canada NB-CA 85 35 10 40 Nova Scotia, Canada NS-CA Ontario, Canada ONT-CA 60 40 10 10 Alberta, Canada AL-CA 50 20 10 10 0 10 0 Totals 375 586 375 47 49 83 107 15 Note: Table based on results of Questions 20 and 21 of the survey and data mined from the NBI Database.
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From page 22... ...
TABLE 2 USE OF CATHODIC PROTECTION ON VARIOUS BRIDGE COMPONENTS TABLE 3 TYPES OF CATHODIC PROTECTION SYSTEMS USED BY RESPONDENTS to have been used on all bridge components by the greatest number of agencies. Arc sprayed zinc was reported as the second most used system.
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From page 23... ...
Some activity is also underway in India. One of the largest reinforced concrete cathodic protection systems to be installed in the Middle East is the titanium mesh anode system installed in Yanubu, Saudi Arabia, in 1987.
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