00156023

Component

http://onlinepubs.trb.org...s/trr/1976/604/604-006.pdf

http://scholar.google.com...lson&publication_year=1976

Many concrete bridge decks are being damaged by surface spalling or internal delaminations caused by corrosion of the reinforcing steel. Cathodic protection can be applied to bridge decks to stop this type of damage. Cathodic protection was applied to three bridge decks in Ontario: two slab decks on AASHTO beams and a voided, posttensioned structure. Each deck was equipped with resistance probes, which showed that the corrosion of the reinforcing steel was stopped when cathodic protection was applied. The bridges were studied to determine the minimum potential required and the most advantageous electrode configuration and spacing for adequate protection. The technique for measuring the polarized potential on the steel was studied, and probes buried in the conductive layer were found to be more effective than half-cell measurements. Data for all three bridges are presented. The protection on the first two of these bridges has been operated successfully for 1 year, and that on the third bridge has been operated successfully for 9 months.

Publication of this paper sponsored by Committee on Corrosion. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01411458

pp 38-47

1976

Transportation Research Record

030902577X

Digital/other

Figures (15) ; References (23) ; Tables (4)

Bridge decks; Cathodic protection; Concrete; Corrosion; Corrosion resistance; Delamination; Electrodes; Polarization; Probes (Measuring devices); Reinforcing steel; Spalling

Ontario, Canada

Ontario, Canada

Geotechnology; Highways; Materials

TRIS, TRB

Aug 31 1977 12:00AM

• DESIGN AND CONSTRUCTION OF CONVENTIONAL BRIDGE DECKS THAT ARE RESISTANT TO SPALLING
• ELECTROCHEMICAL REMOVAL OF CHLORIDES FROM CONCRETE BRIDGE DECKS
• FUNDAMENTALS OF CORROSION
• LABORATORY CORROSION TESTS OF GALVANIZED STEEL IN CONCRETE
• PIPE CORROSION AND PROTECTIVE COATINGS
• USE OF CHARACTERISTIC CURVES IN THE DESIGN OF ELASTOMERIC PAVEMENT SEALS