EVALUATION OF NORCURE PROCESS FOR ELECTOCHEMICAL CHLORIDE REMOVAL FROM STEEL-REINFORCED CONCRETE BRIDGE COMPONENTS

The NORCURE TM process was developed in Norway for the removal of chloride from reinforced concrete bridge decks. This study applied the NORCURE chloride removal electrolyte and process to two steel reinforced concrete slabs, evaluated the effect of the removal process on the slabs, and compared the results to other slabs. The study included a field demonstration on a substructure in Burlington, Ontario, and evaluated technical data including data gathered before treatment, during energization, and after treatment. The study results helped establish the impact of the process on chloride removal rate, rebar bond strength, and concrete properties. This report analyses the rate and total amount of chloride removed, the corrosive state of the steel before and after the process, the effects on the concrete, and other aspects of the installations.