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International Journal of Concrete Structures and Materials
Fig. 12 | International Journal of Concrete Structures and Materials

Fig. 12

From: Use of Higher-Harmonic and Intermodulation Generation of Ultrasonic Waves to Detecting Cracks due to Steel Corrosion in Reinforced Cement Mortar

Fig. 12

Evolution of the parameters Bn and Bpn, normalized to their initial values (t = 0), during the tests of the three reinforced cement mortar specimens (transducer emitter excited with 180 V). The dotted horizontal line represents the arbitrary threshold considered as indicative of a critical increase of the non-linear elastic features, see text for details.

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