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98656 RAPID ELECTROCHEMICAL TREATMENT OF CONCRETE: A SHORT TERM PROCESS CAN GIVE LONG TERM BENEFITS

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Product Number: 51300-98656-SG
ISBN: 98656 1998 CP
Author: D.W. Whitmore
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Much of the deterioration of concrete structures can be attributed to chloride contamination. Rapid electrochemical methods have been developed to remove water soluble chlorides which cause comosion. Electrochemical Chloride Extraction (ECE) removes the cause of the corrosion and leaves the concrete in a passive and stable condkion. ECE has been applied to all types of concrete structures, including bridge decks and substructure elements, parking structures, and other concrete building elements. This paper describes the electrochemicaltreatment methods and presents results from some of the field installations completed in North America to date. Based on an interpretation of the data available, it is hypothesized that shorter duration treatments may be sufficient to provide long term passivity. Keywords Electrochemical Chloride Extraction ECE, Reitiorcing Steel Corrosion, Concrete Restoration.
Much of the deterioration of concrete structures can be attributed to chloride contamination. Rapid electrochemical methods have been developed to remove water soluble chlorides which cause comosion. Electrochemical Chloride Extraction (ECE) removes the cause of the corrosion and leaves the concrete in a passive and stable condkion. ECE has been applied to all types of concrete structures, including bridge decks and substructure elements, parking structures, and other concrete building elements. This paper describes the electrochemicaltreatment methods and presents results from some of the field installations completed in North America to date. Based on an interpretation of the data available, it is hypothesized that shorter duration treatments may be sufficient to provide long term passivity. Keywords Electrochemical Chloride Extraction ECE, Reitiorcing Steel Corrosion, Concrete Restoration.
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Chloride induced corrosion is recognized as a significant disease in the nation's concrete infrastructure. This paper will provide an overview of the various corrosion mitigation techniques available and then focus on two innovative methods of using discrete anodes embedded within the concrete to provide corrosion protection to existing structures.
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