<title>Impact-echo and impulse response stress-wave methods: advantages and limitations for the evaluation of highway pavement concrete overlays</title>

Non-destructive identification of pull-off adhesion between concrete layers

“…In particular the following are determined: -arithmetical mean height Sa, -root mean square height Sq, -surface bearing index Sbi. Table 2 Synthetic description of acoustic impulse response method [51][52][53].…”

“…The methodology uses parameters estimated on the concrete substrate layer surface by the latest 3D laser scanning method [37][38][39][40][41][42][43][44][45][46][47][48][49][50] and parameters estimated on the floor surface by the impulse response and impact-echo methods [51][52][53][54][55][56][57][58][59] and ANN.…”

Automated control of cellulose fibre cement boards with a non-contact ultrasound scanner

“…Also Garbacz [5] proposed to use the pull-off method to produce a delamination map on the surface of layered concrete elements, including floors with an overlaid repair layer. Davis [6] and Hertlein and Davis [7] recommended the state-of-the-art impulse response method in searching for delamination in concrete floors. Ottosen et al [8], Garbacz [5] and Sansalone [9] proposed to use the nondestructive impact-echo method for this purpose.…”

Methodology of Nondestructive Identification of Defective Concrete Zones in Unilaterally Accessible Massive Members

“…In Garbacz and Piotrowski (2010), Krause et al (2005) and Taffe, Wiggenhauser (2006) it is proposed to use the impactecho method for this purpose. In Davis (2003), Davis et al (1996) Hertlein, Davis (1998) and Ottosen et al (2004) the nondestructive impulse response method is recommended for locating defects in concrete In the literature, one cannot find any study dealing with the identification and location of defects in the form of excessively porous concrete in unilaterally accessible massive concrete members, for which purpose, at least two of the above nondestructive acoustic methods, for example, the impulse response method and the ultrasonic tomography method, would be used sim ultaneously. Although the authors Kurz et al (2012) and Huston et al (2011) came up with an idea of the integrated use of the methods, the experiments they conducted were not directly connected with the location of zones of excessively porous concrete.…”