Investigation of field corrosion performance and bond/development length of galvanized reinforcing steel : [tech transfer summary].

PDFBriefIHRB Project TR-666InTrans Project 13-481Reinforced concrete bridgesReinforcing steelBond strength (Materials)CorrosionReinforcing barsGalvanizingEpoxy coatingsLaboratory testsIowaIowa State University. Institute for TransportationPhares, Brent M.Keierleber, BrianIowa State University. Bridge Engineering CenterIowa. Highway Research BoardUnited States. Federal Highway AdministrationUS Transportation CollectionIn reinforced concrete systems, ensuring that a good bond between theconcrete and the embedded reinforcing steel is critical to long-term structuralperformance. Without good bond between the two, the system simply cannotbehave as intended.The bond strength of reinforcing bars is a complex interaction between localizeddeformations, chemical adhesion, and other factors. Coating of reinforcing bars,although sometimes debated, has been commonly found to be an effective way todelay the initiation of corrosion in reinforced concrete systems.For many years, the standard practice has been to coat reinforcing steel withan epoxy coating, which provides a barrier between the steel and the corrosiveelements of water, air, and chloride ion