An innovative technique used on box beam bridge structures included in the Rapid Bridge Replacement Project, is the application of a polyester polymer concrete (PPC) overlay. The overlay material is designed to protect bridge decks from the infiltration of deicing salts and reduce long-term maintenance costs.
The overlay material can only be applied after the concrete has cured for at least 30 days, temperatures are consistently above 40 degrees and dry weather is forecasted. It is PWKP’s goal to open these structures to traffic as quickly as possible, as a result, motorists may notice a slight bump on the bridge until the overlay is applied.
These bridges are completely safe to the traveling public without the overlay. In order to alert drivers of the bump, warning signs will be placed near the bridge sites. Drivers are encouraged to stay alert of the signage near these bridge sites. When crews apply the overlay, one-half of the bridge will be closed and flaggers will assist in guiding alternating, bi-directional traffic.
In order to keep the public informed of when an overlay will be applied to a structure that may affect you, a schedule of PPC overlay operations is below. In the event of unfavorable weather, this schedule may change. Any such changes will be posted here.
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