Non-destructive testing (NDT) of a segmental concrete bridge scheduled for demolition, with a focus on condition assessment and corrosion detection of internal tendons : [summary].

PDFTech ReportBDV29-977-05Nondestructive testsAcoustic emission testsInductanceConcrete bridgesUnited StatesFloridaFlorida. Dept. of Transportation. Research CenterAzizinamini, AtorodFlorida International UniversityFlorida. Dept. of Transportation. Research CenterFlorida. Dept. of Transportation. Maintenance OfficeFlorida. Dept. of Transportation. State Materials OfficeSardinas, AlbertoLasa, IvanUS Transportation CollectionIn this project, Florida International University researchers used segments from a demolished concrete segmental bridge with internal tendons to study damage to post-stressed tendons and to test the effectiveness of various methods of non-destructive testing (NDT) for detecting damaged tendons.Tendon damage was investigated by examination of segments removed from an interstate highway off-ramp, in laboratory tests of mockups, and in computer simulations. Six detection technologies were studied, some onsite and some in the laboratory: impulse response, infrared thermography, magnetic flux leakage, acoustic emission, interferometric phase radar, and inductance measurement.Improved methods of inspecting concrete structures for damage to tensioning cables can help to detect damage earlier, prevent more serious damage, and lead to a better understanding of the processes that damage tendons and better construction methods