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

Description: 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.

  • Date Published: February, 1995
  • Publication Number: WA-RD 374.1
  • Last Modified: November 11, 2007
  • Authors: DeWayne L. Wilson, Edward H. Henley.
  • Originator: Washington (State). Bridge and Structures Office.
  • # of Pages: 100 p., 2,442 KB (PDF)
  • Subject: Benefits, Bridge decks, Epoxides, Evaluation and assessment, Methyl methacrylate, Overlays (Pavements), Polymers.
  • Keywords: Thin overlay, polymer concrete, bridge deck repairs.
  • Related Publications:


This abstract was last modified April 29, 2008