Determination of Bridge Deck Subsurface Anomalies by Infrared Thermography and211 Ground Penetrating Radar; Polk-Quincy Viaduct I-70, Topecka, Kansas

摘要

The purpose of this study was to evaluate the use of infrared (IR) theromgraphy211u001eand ground penetrating radar (GPR) to find subsurface anomalies, delaminations 211u001eand de-bonding, on asphalt concrete overlaid concrete bridge decks. An infrared 211u001ethermographic and ground penetrating radar evaluation was conducted on the I-70 211u001ePolk-Quincy viaduct in 1993. The results were compared to other studies conducted 211u001eto check for subsurface anomalies. These included a 1989 Geology bridge deck 211u001eevaluation, completed before the membrane and overlay were in place, a 1992 211u001emembrane-pavement system electrical resistivity study, and a 1996 Research 211u001eevalaution to check for de-bonding. The last two studies were completed after the 211u001easphalt concrete overlay was in place. There were differences between the results 211u001eof the IR/GPR study and those conducted using the more traditional methods.