Instandsetzung einer Betonbrücke mit Walzträgern nach dem Prinzip des Kathodischen Korrosionsschutzes

Repair of a Concrete-Bridge with Rolled Section Beams applying the Principle of Cathodic Protection

When repairing reinforced concrete structures containing chlorides by conventional methods, it is often necessary to remove the concrete to great depths. This causes high costs and leads to a significant intervention of the structure, combined with a limitation of use whilst repair measures. This is the reason why Cathodic Protection (CP) of reinforcement in concrete is gaining importance as predominantly non-destructive, costeffective repair measure of structures susceptible to or damaged by corrosion. Consecutively the repair measure of the bridge over the Auer Mühlbach in Munich using CP is described. The load bearing system of the bridge of Auer Mühlbach consists of rolled section steel beams, which are protected using discrete anodes. Due to the high ground cover and the high importance to the intra-urban traffic, the application of CP was in particular advantageously as the traffic has not been limited whilst the repair measure.