Severe corrosion of reinforcing steel in the concrete barriers on several bridges in the Rochester, N.Y., area forced department of transportation engineers to look for cost-effective, long-term solutions for rehabilitating these aging structures. The first project to address this deterioration was a 2000-foot-long twin bridge on Interstate 390.
Officials didn't consider removing and replacing the concrete barriers a viable option, and spot repairs would have questionable life spans. Instead, DOT engineers chose a retrofit with precast, polymer concrete panels.
Such panels are impervious to liquids and salt, and they will eliminate future deterioration due to reinforcing corrosion.
This project required 8100 linear feet of custom-made panels, manufactured in several lengths to match existing construction joints. The 2-inch-thick, 14,000 psi compressive strength panels were placed in front of the existing barrier and secured with bolts through the panel face. Later, crews poured flowable grout between the panels and the concrete barrier.
Each day, Sealand Contractors Corp. successfully installed up to 500 linear feet of Visi-Barrier precast polymer concrete panels manufactured by Transpo Industries Inc., a supplier of transportation-related polymer concrete products.
Russ Guelli of Sealand said the panels allowed them “to correct large variances in the height and alignment of the old barrier structure.” The result not only creates a more pleasing look, but the project also increases nighttime visibility. In addition, the bright white surface of each new panel allows for better visibility during inclement weather.
- Interstate 390 Bridge, Rochester, N.Y.
- Owner: State of New York
- Contractor: Sealand Contractors Corp., Rush, N.Y.
- Product Manufacturer: Transpo Industries Inc., New Rochelle, N.Y.