High Conductivity Anode Encapsulation Grout for Sustained Anode Performance in Steel Reinforced Concrete Repairs

摘要

Embedded sacrificial zinc anodes have emerged as a promising means of enhancing the durability of repairs to corrosion-deteriorated concrete structures. Sacrificial zinc anodes are encased in grout materials that are formulated with the intent of maintaining the zinc anode in an electrochemically active state. These grouts typically contain salts or humectants comprised of high pH media. Research has shown these grout additives to be capable of activating the zinc anode only on a limited, short-term basis. This paper discusses laboratory testing of a highly conductive proprietary grout material that has demonstrated capability to maintain long-term an electrochemically active state for both encapsulated zinc point anodes for localized repairs, and also in laminated surface-applied panels for large scale protection in either wet or dry zones.