Abstract Manager

Due to aging, heavy daily usage, weather and deicing-salt induced corrosion, the City decided to undertake a major multi-year multi-phased rehabilitation of the Expressway to keep it operational for the future. The expressway was built in 1950s. Because the Gardiner runs across several areas of the city, including established neighbourhoods, two river mouths and the city’s downtown core, a Strategic Rehabilitation Plan was created by the City to deal with this large, complex and important project. This strategic plan divides the rehabilitation into 6 sections.

In 5 out of the 6 sections, depending on the conditions, either superstructures or the deck will be replaced while Substructure will be rehabilitated and re-used. To minimize disruption to commuters, the substructures were structurally repaired using a galvanic protection that will provide corrosion protection for the next 30 to 40 years without major repairs.

This presentation will first introduce the background of Gardiner Expressway and the strategic sustainable rehabilitation plan, present galvanic protection and discuss its application in the long-term rehabilitation and re-use of substructures.