Chapter 22: Protection

The protection of bridge structures is central to the operation of any transport infrastructure and bridge owners seek protection methods that represent an efficient use of the available funds while maintaining adequate serviceability. Investigations of deteriorated structures suggest that problems arise from design errors, errors in the materials specification or construction method employed and poor workmanship or quality control. As a consequence, protection methods should be an integral part of the initial design and materials selection, reflected in the quality of construction employed, and linked to planned inspection. Given the importance of water management, good design should incorporate modifications that reduce the risk of unexpected deterioration while facilitating maintenance processes. At the same time, the bridge engineer can select from a number of active and passive methods for protecting bridge structures, including enclosures, coating systems, cathodic protection and the use of corrosion inhibitors.