Effect of Embedded Rebar Corrosion on Ultrasonic Wave Propagations

Current protocols on reinforced concrete bridge decks are not sufficient in detecting onset concrete delamination. The objective of this research project is to test multiple specimens of rebar concrete with ultrasonic equipment to determine if this methodology will improve detection of onset delamination. Each of the specimens tested in the experiment had varying levels of corrosion in order to diversify and better understand the behavior of concrete delamination. Data was compiled over a two month span through daily testing, and then it was analyzed using WinUPV Software Analysis. Each day of testing included two scenarios. First, ultrasonic testing occurred with the transmitter and receiver both placed on the steel rebar, while the second type of testing involved a transmitter on the steel rebar and receiver on the concrete specimen. This project was a supplement to Dr. Erdogmus’ project with the Nebraska Department of Roads. Not only did the project stand alone in nature, but its data will also aid through the development of the Nebraska Department of Roads continued work