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This letter presents the development of ultrasonic coda wave interferometryto locate and image microcracks created within consolidated granular media,polymer concrete. Results show that microcracks can be detected through codawaves when the polymer concrete is submitted to a linear resonance. Inaddition, the multiple scattering revealed to be dependent on the plane inwhich the resonance is excited. In that sense, Acoustic emission measurementswere performed under flexural resonances generated in (XY) and (XZ) planes toverify the existence of a possible structural anisotropy related tomicrocracks. Recorded acoustic signatures revealed important differences in thefrequency contents, depending on the considered plane, with a consequent wealthon the involved mechanisms during the microcracks vibrations.

Detection and imaging of microcracking in complex media using coda wave interferometry (CWI) under linear resonance conditions