Research notes : thin polymer overlays on bridge decks.
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2007-11-01
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Alternative Title:Thin polymer overlays on bridge decks.
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Abstract:Winters in Oregon are hard on our bridges. Vehicles with studded tires gouge the pavement and abrade the deck surface. This abrasion often leads to reduced skid resistance. As the bridge deck ages, cracks often develop. Deicing chemicals used in winter can penetrate the cracks, reach steel reinforcement and cause corrosion. If corrosion advances and compromises the structure, the entire bridge may need to be replaced.
There are treatment options for pavement that can both increase skid resistance and seal bridge decks. ODOT is currently evaluating eight polymer concrete overlay products designed for these purposes. The overlay consists of a polymer (plastic) resin that is applied to the bridge deck in a liquid form. Aggregate is then broadcast on the resin, and the resin is allowed to cure. Often more than one layer/lift is constructed.
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