Equivalent elastic crack model was used for estimation of the fracture progression (described via the effective crack length increment) at those loading stages. The three-point bending test configuration was utilised to drive the crack propagation process through several loading-unloading cycles, between which, the electrical resistivity and ultrasonic measurements over the fractured region were performed. These two physical characteristics may be employed as a quality indicator of the concrete cover within the procedures of the assessment of the structural durability. The paper is focused on the investigation of the effect of tensile failure propagation on the change in values of electrical resistivity and ultrasound pulse passing time within the central section of beam bend specimens made of normal concrete.
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