Sacrificial anodes in concrete patch repair

Details Sacrificial anodes in concrete patch repair Sacrificial anodes in concrete patch repair

2008-10-19

2010-06-08

Del Sole, Joseph S (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Repairing or restoring consumer used articles for reuse

Inorganic material containing articles

C264S036200, C205S734000

Reexamination Certificate

active

07731875

ABSTRACT:
High performance proprietary cementitious concretes or mortars developed for use as patch repair materials for corrosion damaged concrete often have high resistivities that inhibit the performance of sacrificial anodes located within the patch repair areas. A method of repair is disclosed which comprises removing the corrosion damaged concrete to form a cavity to receive a concrete repair material and forming within this cavity a smaller distinct cavity for assembling a sacrificial anode assembly and placing within this second cavity a pliable viscous ionically conductive backfill and a sacrificial anode and an activating agent to form a sacrificial anode assembly and connecting the anode to the steel and covering the anode and the backfill in the second cavity with a repair material to restore the profile of the concrete structure. In this arrangement a high resistivity repair material promotes the flow of protection current to steel in adjacent contaminated concrete that is at risk of corrosion.

REFERENCES:
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Davison, N., et al., “Principles and applications of galvanic repair . . . ”, in Proceedings of the 7th Int. Conf. on Concrete in Hot and Aggressive Env., 2003, vol. 2, 747.
ACI Committee E 706, Installation of Embedded Galvanic Anodes, ACI Repair Application Procedure 8, American Concrete Institute 2005.
Fosroc Galvashield CC datasheet.
Fosroc Glavashield XP datasheet.
Vector/Sika Galvashield CC datasheet.
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Page and Sergi, Journal of Materials in Civil Engineering, vol. 12 No. 1, pp. 8-15, 2000.

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