Detection of “zero-volume” defects in concrete repair systems using impact-echo method

Adhesion in this system is one of the most important factors that affect reliability and durability repair. According to many standards guidelines, a pull-off test recommended for assessment bond quality repair systems. However, growing interest development non-destructive techniques (NDT) evaluation concrete structures recently noted. A majority NDT methods mentioned EN 1504-10 efficiency are based on propagation stress waves. The impact echo method considered as promising. literature data confirmed “non-zero volume” defects containing air relatively easy detect with impact-echo if they large enough. It more complex “zero-volume” defects, e.g dust or any other antiadhesion material. In work usability detection systems discussed.