Measurement of mortar permittivity during setting using a coplanar waveguide
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A sensor based on a coplanar waveguide structure was designed to perform non-destructive tests for material characterization in which the measurement can be done only on one side of the sample. The measurements were compared with the impedance of a capacitor filled with the same material. The permittivity and insertion loss of the sensor showed valuable information about the setting process of a mortar slab during the first 28 days of the hardening process, and a good correlation between both measurements was obtained, so the proposed setup can be useful for structural surveillance and moisture detection in civil structures.
CitationJuan, P.; Torrents, J. Measurement of mortar permittivity during setting using a coplanar waveguide. "Measurement science and technology", Març 2010, vol. 21, núm. 4, p. 1-6.