Cathodic Protection of U.S. 15 Over Lycoming Creek at Hepburnville, Pennsylvania.Cathodic Deck Protection and Latex Modified Concrete Overlay on Steel I-Beam Bridge

摘要

The report describes the condition of the reinforced concrete deck at the time ofits rehabilitation, documents the rehabilitation specifications and the actual construction, and details the monitoring procedures that will be used to verify the functional adequacy of the cathodic protection. The cathodic protection system was applied to the patched and scarified bridge deck. The deck was then blast cleaned and a 1-1/2 inch thick latex modified concrete wearing surface placed. The constant current cathodic protection system consisted of approximately 9,700 sq ft of Raychem Ferex 100 anode, a prefabricated conductive polymer mesh. The four (4) zone impressed current system is powered by a multiple output rectifier and monitored with silver/silver chloride reference electrodes and re-bar probes. Traffic was maintained on one lane while the adjacent lane was under construction.