Measurement of Complex Permittivity of Asphalt Pavement Materials
Publication: Journal of Transportation Engineering
Volume 125, Issue 4
Abstract
To facilitate applications of road penetration radar and other nondestructive testing technologies on roads, an apparatus was developed for the measurement of complex permittivity of construction materials. The system consists of an automatic network analyzer, a sample holder, coaxial cable connections, and data processing software. The sample holder can accommodate either laboratory-prepared or field-drilled asphalt and concrete samples with maximum aggregate sizes up to 19 mm and lengths up to 400 mm. A computer program is used to convert the parameters measured by the automatic network analyzer into the real and imaginary parts of the complex permittivity. The dielectric constants of 43 laboratory-prepared asphalt samples of fairly consistent bulk densities were measured over the frequency domain of 0.1 MHz to 1.5 GHz. The average dielectric constants were 6.0 ± 0.15 for dry specimens and 6.52 ± 0.99 for soaked samples over the frequency range of 8–900 MHz. A linear relationship was observed between the gravimetric moisture content and dielectric constant up to a moisture content of 1%, with dielectric constant increasing by 0.62 for every 1% increase of moisture content. The results indicate that the asphalt content and mix type did not significantly affect the dielectric constants, whereas the moisture content was identified as the predominant factor. The results provide much needed information on the dielectric properties of asphalt pavement materials.
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References
1.
Avalle, C. A. ( 1994). “Broad-band characterization of complex permittivity and permeability of materials.” 〈http://www-dsed.llnl.gov/documents/em/caa94mat.html〉.
2.
Baker-Jarvis, J., Janezic, M. D., Grosvenor, J. H., Jr. and Geyer, R. G. (1993). “Transmission/reflection and short-circuit line methods for measuring permittivity and permeability.” NIST Tech. Note 1355-R, U.S. Department of Commerce.
3.
Carter, C. R., Chung, T., Masliwec, T., and Manning, D. G. ( 1992). “Analysis of radar reflections from asphalt covered bridge deck structures.” Ground penetrating radar, J. Pilon, ed., Geological Survey of Canada, Ottawa, 33–40.
4.
Davis, J. L., Rossiter, J. R., Mesher, D. E., and Dawley, C. B. (1994). “Quantitative measurement of pavement structures using radar.” Proc., 5th Int. Conf. on Ground Penetrating Radar, 319–334.
5.
Dean, J. A. (1992). Lange's handbook of chemistry, 14th Ed., McGraw-Hill, New York.
6.
Engelder, D. S., and Buffler, C. R. (1991). “Measuring dielectric properties of food products at microwave frequencies.” Microwave World, 12(2), 2–11.
7.
Kutrubes, D. L. ( 1986). “Dielectric permittivity measurements of soils saturated with hazardous fluids,” Master thesis, Colorado School of Mines, Boulder, Colo.
8.
Lau, C. L., Scullion, T., and Chan, P. (1992). “Modelling of ground-penetrating radar wave propagation in pavement systems.” Transp. Res. Rec. 1355, Transportation Research Board, Washington, D.C., 99–106.
9.
Maser, K. R., and Rawson, A. (1992). “Network bridge deck surveys using high-speed radar: Case studies of 44 decks.” Transp. Res. Rec. 1347, Transportation Research Board, Washington, D.C., 25–28.
10.
Maser, K. R., and Scullion, T. (1992). “Automated pavement subsurface profiling using radar: Case studies of four experimental sites.” Transp. Res. Rec. 1344, Transportation Research Board, Washington, D.C., 148–154.
11.
Nicolson, A. M., and Ross, G. F. (1970). “Measurement of the intrinsic properties of materials by time domain technique.” IEEE Trans. on Instrumentation and Measurements, 19(4), 377–382.
12.
“Ontario Provincial Standard Specifications for Roads and Municipal Services (OPSS).” (1993). No. 1149, Publications of Ontario Government.
13.
Roddis, W. M. K., Maser, K., and Gisi, A. J. (1992). “Radar pavement thickness evaluations for varying base conditions.” Transp. Res. Rec. 1355, Transportation Research Board, Washington, D.C., 90–98.
14.
Rudge, A. W., Milne, K., Olver, A. D., and Knight, P. (1982). The handbook of antenna design. Peter Peregrenus Ltd.
15.
Shang, J. Q., Rowe, R. K., Umana, J. A., and Scholte, J. W. (1999). “Complex permittivity measurement system for undisturbed/compacted soils.” Geotech. Testing J., 22(2), 159–168.
16.
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. Non-Destructive Testing, 35(12), 696–704.
17.
Subedi, R., and Chatterjee, I. (1993). “Dielectric mixture model for asphalt-aggregate mixtures.” J. Microwave Power and Electromagnetic Energy, 28(2), 68–72.
18.
Umana, J. A. ( 1998). “Measurement of complex permittivity of pavement materials,” MESc thesis, University of Western Ontario, London, Canada.
19.
Vant, M. R., Ramseier, R. O., and Makios, V. (1978). “The complex dielectric constant of sea ice at frequencies in the range 0.1–40 GHz.” J. Appl. Phys., 49(3), 1264–1280.
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Received: Mar 13, 1998
Published online: Jul 1, 1999
Published in print: Jul 1999
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