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Proceedings Paper

Embedded modulating dipole scattering for near-field microwave inspection of concrete: preliminary investigations
Author(s): Alain Joisel; Karl J. Bois; Aaron D. Benally; Jean-Charles Bolomey; Reza Zoughi
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Paper Abstract

Nondestructive evaluation of concrete structures is an important practical issue in the construction industry. Evaluation encompasses many issues including concrete constituent property, compressive strength and chloride contamination determination to name a few. To this end, a combination of modulated scattering technique and near-field microwave nondestructive evaluation technique, is used to determine its potential for evaluating dielectric properties of a hardened mortar specimen. This technique utilizes a small resonant PIN diode-loaded dipole scatterer embedded inside the mortar while using an open-ended rectangular waveguide probe operating at 7 GHz to detect this dipole which is modulated at low frequencies. The results of this preliminary experiment, and its future ramifications for nondestructive concrete inspection structures are provided in this paper.

Paper Details

Date Published: 15 October 1999
PDF: 7 pages
Proc. SPIE 3752, Subsurface Sensors and Applications, (15 October 1999); doi: 10.1117/12.365700
Show Author Affiliations
Alain Joisel, Supelec (France)
Karl J. Bois, Colorado State Univ. (United States)
Aaron D. Benally, Colorado State Univ. (United States)
Jean-Charles Bolomey, Supelec (France)
Reza Zoughi, Colorado State Univ. (United States)


Published in SPIE Proceedings Vol. 3752:
Subsurface Sensors and Applications
Cam Nguyen, Editor(s)

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