When Carl Walker Engineers, Kalamazoo, Michigan, was asked to evaluate the spalled parking garage of the Mutual Insurance Co., Providence, Rhode Island, it considered five rehabilitation options. The chosen repair method had to offer a long service life and minimal maintenance. Cathodic protection was decided upon as the best option. Not only would it provide 25-plus years of service, but it would do so at a lower present value of life-cycle cost than the other four options.
Cathodic protection is increasingly being used to arrest corrosion in concrete. More than 150 bridges and 60 parking garages in the United States use cathodic protection. The titanium-based mesh cathodic protection system used in this system is maintained and serviced by the manufacturer under a 5-year warranty and service agreement. A remote monitoring and control system using "reference" cells embedded in the concrete slab transmits information by computer and modem to the manufacturer's office. This allows engineers to regularly measure the system's performance without being onsite.