Bridge Deck Patching Materials

011098902008Final ReportPDFTech ReportFHWA-PA-2007-023-510401-10PTI 2008-13510401, Work Order No. 10Bridge decksConcreteCorrosion protectionDurabilityPatchingPatching mortarHighwaysMaintenance and PreservationMaterialsI32: ConcreteI61: Equipment and Maintenance MethodsPennsylvaniaUnited StatesFederal Highway AdministrationSchokker, Andrea J.Cervo, Nicolas M.Pennsylvania. Dept. of Transportation. Bureau of Planning and ResearchThomas D. Larson Pennsylvania Transportation InstituteUnited States. Federal Highway AdministrationUS Transportation CollectionWith the aging of bridges in Pennsylvania, an increasing concern is the deterioration of concrete bridge decks over time, and subsequently, the best way to repair them. Complete deck replacement, although often the best for the bridge, is far from the most economical solution. Therefore, a number of rapid-setting concrete patching materials have been used by the Pennsylvania Department of Transportation (PennDOT) to repair areas of deterioration along the deck. Unfortunately, some of these materials have proven to be ineffective in the long term due to durability issues from vibration and heavy traffic volume. Therefore, there is a need to research, test, and evaluate the various patching materials on the market to determine their effectiveness in variable conditions. The variables include the area of the patch, depth of the patch, and environment (corrosive agents and traffic load). The objectives of this project were to determine the most suitable quick-setting patching material for patches of varying area and depth; determine the corrosion protection provided by the patch to the underlying reinforcement and verify that the patch does not increase corrosion rates in bars contained in the base material; and develop a recommended testing protocol for evaluation of patching materials.78