Thin Polymer Bridge Deck Overlays: WSDOT's Ten Year Evaluation

This report summarizes the Washington State Department of Transportation's (WSDOT's) 10 years of experience with "epoxy" and "methyl methacrylate" (MMA) thin polymer bridge deck overlays. WSDOT uses a modified concrete as its primary type of bridge deck overlay, but in some cases a bridge's physical characteristics, such as lightweight design or narrow roadway width, will not allow using a modified concrete overlay. Thin polymer overlays provide an alternative. Thin polymer overlays offer more rapid construction, curing in 4 to 8 hours compared to 42 hours for a modified concrete overlay. Thin polymer overlays are lightweight (due to their 3/8 in. thickness, approximately 5 lb/SF versus 19 lb/SF for a modified concrete overlay) and are generally less labor intensive and require less specialized equipment than a modified concrete overlay.
Publication Date: 
Tuesday, January 31, 1995
Publication Number: 
WA-RD 374.1
Last modified: 
10/12/2016 - 15:41
DeWayne L. Wilson, Edward H. Henley.
Washington (State). Bridge and Structures Office.
Number of Pages: 
Benefits, Bridge decks, Epoxides, Evaluation and assessment, Methyl methacrylate, Overlays (Pavements), Polymers.