A Case Study of Three Methods Used in Detecting Bridge Deck Deterioration Associated with Spalling

Report No: 73-R4

Published in 1973

About the report:

The three most widely used current methods for detecting deterioration of concrete bridge decks associated with spalling were compared with a visual inspection of the reinforcing steel and to each other in order to determine the degree of agreement among the methods. The three methods are known as the Chain Drag Method, Measurement of Corrosion Potentials, and the Hammer Method. On a bridge scheduled for deck replacement, each of the methods was used to designate the areas of deck to be removed and the results were compared with the findings of a visual inspection of the rebar. It was concluded that the three techniques were practical and effective. However, in order to ensure that a high percentage of deteriorated areas are located, two of the detection methods should be used and the areas indicated by both methods should be removed.

Disclaimer Statement:The contents of this report reflect the views of the author(s), who is responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Any inclusion of manufacturer names, trade names, or trademarks is for identification purposes only and is not to be considered an endorsement.


Other Authors

Charles E. Smith

Last updated: February 7, 2024

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