Test Protocol to Evaluate the Effectiveness of Embedded Sacrificial Anodes in Reinforced Concrete

摘要

Reinforced concrete subjected to chloride exposures can have severe corrosion occurring in discreet locations. A typical repair involves removing the distressed concrete, replacing reinforcing bar if necessary and filling the hole with a cementitious repair material that is often concrete. Steel in the repair location often becomes a cathode to the surrounding steel resulting in corrosion of the bars in the concrete near the patch. One means to mitigate the acceleration of corrosion in the areas near the patch is to embed sacrificial anodes into the patch. These anodes provide corrosion control to the steel near the patch as well as to the steel in the patch. This paper describes a new test protocol that can ascertain the effectiveness of embedded sacrificial anodes in mitigating corrosion on steel outside of the repair patch.