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08308 Modeling of Polarization by Point Anodes for Prevention of Reinforcing Steel Corrosion

Product Number: 51300-08308-SG
ISBN: 08308 2008 CP
Author: Margareth Dugarte, A.A. Sagüés, and Rodney G. Powers
Publication Date: 2008
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$20.00
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This paper addresses the first phase in developing a numerical model for polarization distribution prediction of the rebar-anode system in reinforced concrete slabs with residual chloride contamination, where sacrificial point anodes were embedded in the concrete patch repair area. The modeling approach was developed to characterize the performance of this system under two application scenarios: one with part of the rebar assembly in the active condition and the other with an all-passive assembly. The model results and experimental findings in > 2 year old concrete slabs are compared. Results could be used to determine the anode operating potentials that may be achieved with specific anode placement spacing for highway applications. Experimental polarization curves provide additional information for future modeling improvement.
This paper addresses the first phase in developing a numerical model for polarization distribution prediction of the rebar-anode system in reinforced concrete slabs with residual chloride contamination, where sacrificial point anodes were embedded in the concrete patch repair area. The modeling approach was developed to characterize the performance of this system under two application scenarios: one with part of the rebar assembly in the active condition and the other with an all-passive assembly. The model results and experimental findings in > 2 year old concrete slabs are compared. Results could be used to determine the anode operating potentials that may be achieved with specific anode placement spacing for highway applications. Experimental polarization curves provide additional information for future modeling improvement.
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