Accuracy of Ground-Penetrating Radar for Concrete Pavement Thickness Measurement
Publication: Journal of Performance of Constructed Facilities
Volume 24, Issue 6
Abstract
Core extraction is the most common method for measuring concrete layer thickness in pavement construction. Although this method provides a very accurate thickness measurement, it is destructive, time-consuming, and does not provide adequate representation of the concrete layer thickness variability. Ground-penetrating radar (GPR) is a nondestructive evaluation technique that has been successfully used in several transportation applications, such as subsurface exploration and condition assessment. The main objective of this research is to investigate the accuracy and cost-effectiveness of using GPR in thickness measurement of concrete pavement for quality assurance purposes. A high-resolution 1.6-MHz ground-coupled antenna was used to perform grid scans and measure concrete thickness for several laboratory and field experiments. Results indicated that the use of metal objects underneath the concrete layer to improve bottom surface reflectivity was necessary for a reliable thickness measurement. Also, the use of calibration cores to determine the actual dielectric properties of the concrete was essential for accurate thickness calculation. An average accuracy of 98.5% was achieved when steel plates were used underneath the concrete layer and two cores were extracted for calibration. The effect of concrete age on GPR thickness measurement accuracy was also investigated.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
This project was sponsored by the Nebraska Department of Roads (NDOR) and the University of Nebraska-Lincoln. The support of the technical advisory committee (TAC) members is gratefully acknowledged. They spent a lot of time and effort in coordinating this project, discussing its technical direction, and inspiring the university researchers. Acknowledgment also goes to the undergraduate and graduate students who participated in the different phases of the project.
References
Al-Qadi, I. L., and Lahour, S. (2004). “Ground-penetrating radar: State of the practice for pavement assessment.” Mater. Eval., 42(7), 759–763.
ASTM. (2006a). “Standard test method for determining the thickness of bound pavement layers using short-pulse radar.” D4748-06, West Conshohocken, Pa.
ASTM. (2006b). “Standard test method for measuring thickness of concrete elements using drilled concrete cores.” C174/C174M-06, West Conshohocken, Pa.
Kurtz, J., Choubane, B., and Fernando, E. (2001). “Improved roadway subsurface thickness measurement and anomaly identification with ground-penetrating radar.” Rep. No. BC-354-6, Florida DOT, Tallahassee, Fla.
Loulizi, A., Al-Qadi, I. L., and Lahouar, S. (2003). “Optimization of ground-penetrating radar data to predict layer thickness in flexible pavements.” J. Transp. Eng., 129(1), 93–99.
Maierhofer, C. (2003). “Nondestructive evaluation of concrete infrastructure with ground-penetrating radar.” J. Mater. Civ. Eng., 15(3), 287–297.
Maser, K. R. (1996). “Condition assessment of transportation infrastructure using ground-penetrating radar.” J. Infrastruct. Syst., 2(2), 94–101.
Meyer, K., Erdogmus, E., Morcous, G., and Naughtin, M. (2008). “Use of ground-penetrating radar for accurate concrete thickness measurements.” Proc., 2008 Architectural Engineering Conf., Architectural Engineering Institute (AEI), Denver.
Olhoeft, G., and Smith, S. (2000). “Automatic processing and modeling of GPR data for pavement thickness and properties.” Proc., 8th Int. Conf. on Ground-Penetrating Radar, SPIE, Bellingham, Wash.
Scuillion, T., Lau, C. L., and Chen, Y. (1994). “Implementation of Texas ground-penetrating radar system.” Rep. No. 1233-1, Texas Transportation Institute, College Station, Tex.
Willett, D. A., Mahboub, K. C., and Rister, B. (2006). “Accuracy of ground-penetrating radar for pavement-layer thickness analysis.” J. Transp. Eng., 132(1), 96–103.
Information & Authors
Information
Published In
Copyright
© 2010 ASCE.
History
Received: Jan 30, 2009
Accepted: Jan 21, 2010
Published online: Nov 15, 2010
Published in print: Dec 2010
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.