Long-Term Performance of Polymer Concrete for Bridge Decks

Thin polymer overlays (TPOs) consist of a polymer binder and aggregates with a thickness not exceeding 25 mm (1 in.). They have provided long-lasting wearing surfaces for bridge decks with many advantages, including adding very little dead load; very fast cure times; shallow depths that eliminate the need for raising approach slabs; ability to transition from overlaid lane to non-overlaid lane during construction; low permeability; and good frictional resistance. This study found that TPOs have become an accepted construction method for deck preservation, restoring surface friction and extending the lives of decks. When constructed properly on sound decks, TPOs should provide a service life of 20 or 25 years. Information was gathered through literature review, a survey of all state transportation agencies, and selected interviews.