Microwave nondestructive evaluation (NDE) techniques applied to mortar have proven successful in the past for detecting mixture constitutes, salt ingress, loading and cure state monitoring. In this paper, a similar microwave NDE technique is used to evaluate reflection properties of concrete for cyclical exposure to salt ingress and loading at S-(2.6-3.95 GHz) and X-(8.2-12.4GHz) microwave frequency bands. Four identical cubic specimens were prepared: one soaked in distilled water, one soaked in a 3%-salt solution, one soaked in a 3%-salt solution and loaded and finally one that was neither soaked nor loaded. Using both magnitude and phase of microwave reflection coefficient, it is shown that the cubes can be distinguished from one another using this technique.
J. T. Case et al., "Microwave Reflection Properties of Concrete Exposed Periodically to Chloride Solution of 3% Salinity and Compression Force," Proceedings of the 20th IEEE Instrumentation and Measurement Technology Conference (2003, Vail, CO), vol. 2, pp. 963-967, Institute of Electrical and Electronics Engineers (IEEE), May 2003.
The definitive version is available at http://dx.doi.org/10.1109/IMTC.2003.1207895
20th IEEE Information and Measurement Technology Conference (2003: May 20-22, Vail, CO)
Electrical and Computer Engineering
Keywords and Phrases
Electromagnetic Wave Reflection; Microwaves; Nondestructive Examination; Reinforced Concrete; Sodium Chloride; Computation Theory; Concrete Testing; Concretes; Distributed Computer Systems; Frequency Bands; Laboratories; Microwave Measurement; Moisture; Mortar; Reflection; Distilled Water; Salinity Measurement; Chloride Solutions; Compression Force; Microwave Bands; Microwave Reflection Properties; Microwave Theory And Techniques; Non-Destructive Evaluation Techniques; Peer-to-Peer Computing; Reflection Properties
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