Article (Scientific journals)
Detection of “zero-volume” defects in concrete repair systems using impact-echo method
Harassek, Piotr; Garbacz, Andzej; Courard, Luc
2023In Theory and Building Practice, 2 (2)
Peer reviewed


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Keywords :
impact echo; repair; evaluation; defects; frequency; wavelet
Abstract :
[en] Adhesion in this system is one of the most important factors that affect the reliability and durability of repair. According to the many standards and guidelines, a pull-off test is recommended for assessment of a bond quality in repair systems. However, a growing interest in development of non-destructive techniques (NDT) for evaluation of concrete structures is recently noted. A majority of NDT methods mentioned in EN 1504-10 for repair efficiency assessment are based on propagation of stress waves. The impact echo method is considered as a one of the promising. The literature data confirmed that the “non-zero volume” defects containing air are relatively easy to detect with impact-echo method if they are large enough. It is more complex to detect “zero-volume” defects, e.g dust or any other antiadhesion material. In this work usability of impact-echo for detection of “zero-volume” defects in repair systems is discussed.
Disciplines :
Civil engineering
Author, co-author :
Harassek, Piotr
Garbacz, Andzej;  Warsaw University of Technology
Courard, Luc  ;  Université de Liège - ULiège > Département ArGEnCo > Matériaux de construction non métalliques du génie civil
Language :
Title :
Detection of “zero-volume” defects in concrete repair systems using impact-echo method
Publication date :
Journal title :
Theory and Building Practice
Publisher :
Institute of Civil Engineering and Building Systems (CEBS) - Lviv Polytechnic National University, Lviv, Ukraine
Volume :
Issue :
Peer reviewed :
Peer reviewed
Funders :
WBI - Wallonia-Brussels International [BE]
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