Joplin Train Depot – Half-Cell Testing

Owner: Oklahoma Dept. of Transportation

System: Anode Protection & Dry Shotcrete

Completed: 2001

Description:

A leaking expansion joint led to chloride corrosion of the reinforcing steel within the pier cap and columns.  This led to spalling within the concrete.  Spalled concrete was removed, the substrate and reinforcing steel was prepped by mechanical means, sacrificial galvanic anodes were installed on the reinforcing steel (2’ OC) and the spalls were repaired via a dry shotcrete process.  Anodes were used to prolong the life of the repair by sacrificing the zinc core due to any further concern with existing corrosion, thus protecting the reinforcing steel.