The Washington State Department of Transportation is conducting an experimental field evaluation of selected polymer concrete thin (1/4 inch) overlays. The polymer concrete material is manufactured by private industry firms and installed on selected bridge decks under standard WSDOT construction contracts. Approximately 24 bridges will be involved in the experiment; eight of these are included in federal participating construction projects as experimental features.
Two polymer concrete thin overlays, Dural Flexolith and Sika Pronto 19, were applied to the decks of SR 5 OC Bridge 900/12W and SR 5 OC Bridge 900/13W, respectively, under contract no. 3189, SR 5 Weigh Station to Corson Ramp Resurfacing. Both bridges are concrete box girder bridges located on SR 900 just south of Seattle.