Damage detection techniques for concrete applications.

PDFTech ReportCHPP Report-UMN#1-2016Concrete constructionConcrete pavementsNondestructive testsUltrasonic testsUnited StatesMichigan State University. Center for Highway Pavement PreservationKhazanovich, LevFreeseman, KatelynSalles, LucioAsadollahi, AzizMichigan State University. Center for Highway Pavement PreservationUnited States. Dept. of Transportation. Research and Innovative Technology AdministrationUS Transportation CollectionNew technological advances in nondestructive testing technology have created the opportunity to better utilize ultrasonic waves to aid in damage detection applications for concrete. This research utilizes an ultrasonic array device for nondestructive damage detection purposes. The ultrasonic shear velocity array system used for this research is particularly advantageous because it can obtain measurements on virtually any concrete specimen, from columns and beams to concrete pavements, and provides a wealth of data from a single measurement. Novel signal interpretation methods were developed for several important concrete applications.Detection of load-induced damage in a full-scale reinforced concrete column, as well as standard life-cycle damage in concrete pavements caused by freeze thaw or alkali-silica reaction degradation were considered. In addition, cracking in continuously reinforced concrete pavements was considered. These investigations culminated in the development of successful and efficient quantitative damage detection methods