The Washington State Department of Transportation will be conducting experimental field testing of several selected polymer concrete thin (1/4 inch) overlays over a ten-year period. The polymer concrete material is manufactured by private industry firms and installed on selected bridge decks under standard WSDOT construction contracts. Approximately 21 bridges will be involved in the experiment; eight of these are included in federal participating projects as experimental features.
The polymer concrete thin overlays were applied to the decks of the Naches River Bridge 82/115S and the Yakima River Bridge 82/114S under Contract No. 3131, SR 90 and SR 82, Cle Elum Interchange to Terrace Heights. Both bridges are steel truss bridges located on SR 82 just outside Yakima, Washington.
Both the epoxy overlay and the methyl methacrylate overlays were versatile products to apply under difficult traffic control conditions. Starting and stopping the various pours to accommodate opening and closing of lanes for traffic proved satisfactory. To the extent possible, work was performed at night when traffic was light. All three lanes were then opened to traffic in the early morning to accommodate peak traffic conditions.