United States Department of Transportation
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Case Study: Utilization of Cathodic Protection to Extend the Service Life of Reinforced Concrete Bridges – An Overview of the Installation and Maintenance of the Cathodic Protection Systems Protecting the Howard Frankland and Crescent Beach Bridges
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2021-11-01
[PDF-2.60 MB]
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Abstract:Many steel reinforced concrete bridges must endure exposure to corrosive materials such as deicing salts and salt water. Unmitigated, these materials accelerate corrosion and significantly reduce the service life of bridges. While corrosion-resistant materials can be chosen during the design phase, addressing corrosion in existing structures can be more of a challenge. Some transportation departments have successfully implemented cathodic protection (CP) systems to alleviate corrosion issues with existing bridges. This case study provides an in-depth analysis of the construction, maintenance, and associated costs of the CP systems used to protect the substructures of the Howard Frankland Bridge (Tampa, FL), which is exposed to the Gulf of Mexico, and the Crescent Beach Bridge (Crescent Beach, FL), which is exposed to the Atlantic Ocean. Both bridges exhibited significant substructure corrosion in the 1980s and were fitted with CP systems. Today, more than thirty years later, both bridges remain in full-load service.
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