Coaxial Transmission Lines: Development of Test Procedures for Concrete
Publication: Journal of Materials in Civil Engineering
Volume 13, Issue 3
Abstract
The use of ground-penetrating radar as a nondestructive investigative technique has gained increasing acceptance both in the United States and in Europe for assessing the structural integrity of concrete structures. However, without an accurate knowledge of the electrical properties of concrete at radar frequencies, it is difficult to quantitatively assess the results of a ground-penetrating radar survey. This paper reports the simultaneous, but independent, developments of two coaxial transmission line systems at Virginia Tech and The University of Liverpool. Both are designed to measure the relative permittivity and conductivity of concrete over a range of frequencies from 100 MHz to 1 GHz. This paper discusses the development of the two transmission lines, and a comparison of the two methods of measurement and interpretation of results.
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References
1.
Bungey, J. H., and Millard, S. G. ( 1993). “Radar inspection of structures.” Proc., Inst. Civ. Engrs., Struct., and Build., Vol. 99, 173–186.
2.
Bungey, J. H., Millard, S. G., and Shaw, M. R. ( 1997). “Radar assessment of posttensioned concrete.” Proc., 7th Int. Conf. on Struct. Faults and Repair '97, Vol. 1, Engineering Tecnics Press, Edinburgh, Scotland, 331–340.
3.
Clemena, G. C. ( 1991). “Short pulse radar methods.” Chapter 6, CRC handbook on nondestructive testing of concrete, M. V. Malhotra and N. J. Carino, eds., CRC, Boca Raton, Fla.
4.
Daniels, D. J. ( 1996). “Surface penetrating radar.” Electronics and Communication Engrg., 165–182.
5.
Halabe, U. B., Chen, H.-L., Bhandarkar, V., and Sami, Z. ( 1997). “Detection of sub-surface anomalies in concrete bridge decks using ground-penetrating radar.” ACI Mat. J., 94(5), 396–408.
6.
Loulizi, A., Al-Qadi, I. L., and Diefenderfer, B. D. ( 1999). “Dielectric characterization of concrete from 100 MHz to 1 GHz using a coaxial transmission line.” Proc., 8th Int. Conf. on Struct. Faults and Repair.
7.
Maser, K. R. ( 1991). “Bridge deck condition survey.” Proc., 70th TRB Annu. Meeting, Transportation Research Board, Washington, D.C.
8.
Molyneaux, T. C. K., Millard, S. G., Bungey, J. H., and Zhou, J. Q. ( 1995). “Radar assessment of structural concrete using neural networks.” NDT Int., 28(5), 281–288.
9.
Nicolson, A. M., and Ross, G. F. ( 1970). “Measurements of the intrinsic properties of materials by time-domain techniques.” IEEE Trans. on Instrumentation and Measurement, IM-19(4), 263–268.
10.
Al-Qadi, I. L., and Riad, S. M. ( 1996). “Electromagnetic and ultrasonic characterization of portland cement concrete: Development of measurement techniques.” Final Rep., Via Dept. of Civ. Engrg., Virginia Tech, Blacksburg, Va.
11.
Al-Qadi, I. L., Riad, S. M., Mostafa, R., and Su, W. ( 1997). “Design and evaluation of a coaxial transmission line fixture to characterize portland cement concrete.” Build. Constr. Mat. J., 11(3), 163–173.
12.
Al-Qadi, I. L., Su, W., Riad, S. M., Mostafa, R., and Hazim, O. ( 1994). “Coaxial fixture development to characterize portland cement concrete.” Proc., Symp. on Time Domain Reflectometery in Envir., Infrastructure, and Mining Applications, K. M. O'Connor, et al., eds., 443–452.
13.
Shaw, M. R. ( 1998). “The permittivity and conductivity of concretes at ground-penetrating radar frequencies.” Adv. in Cement Res., 10(4), 187–194.
14.
Shaw, M. R., Millard, S. G., Houlden, M. A., Austin, B. A., and Bungey, J. H. ( 1993). “A large diameter transmission line for the measurement of the relative permittivity of construction materials.” British J. Nondestructive Testing, 35(12), 696–704.
15.
Wensink, W. A. ( 1993). “Dielectric properties of wet soils in the frequency range 1–3,000 MHz.” Geophys. Prospecting, 41, 671–696.
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Received: Aug 10, 1999
Published online: Jun 1, 2001
Published in print: Jun 2001
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