Imaging of voids in concrete by impact-echo and ultrasonic-echo methods [Betondaki boşlukların darbe-eko ve ultrasonik-eko yöntemleri ile görüntülenmesi]
Küçük Resim Yok
Tarih
2018
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Gazi Universitesi Muhendislik-Mimarlik
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Impact-echo (IE) and ultrasonic-echo (UE) are widely used elastic wave methods to determine voids in concrete and have successful applications in the field. However, because in most cases it is difficult to interpret the results, researchers have been studying on to develop imaging algorithms. In this study, SIBIE (Stack Imaging of Spectral Amplitudes Based on IE) and SAFT (Synthetic Aperture Focusing Technique) algorithms were used in order to evaluate voids within concrete blocks. For this purpose, concrete blocks containing post-tensioning ducts that include voids were produced and IE and UE tests were carried out to locate the voids. Moreover, apart from the other studies in literature, effect of thickness of the metal ducts on phase change of the ultrasonic signal was determined. As a result of the study, along with successful void visualization, material characterization by means of acoustic impedance characteristics of air and steel was made. © 2018 Gazi Universitesi Muhendislik-Mimarlik. All rights reserved.
Açıklama
Anahtar Kelimeler
Elastic wave, Impact-echo, Ultrasonic-echo, Void detection
Kaynak
Journal of the Faculty of Engineering and Architecture of Gazi University
WoS Q Değeri
Scopus Q Değeri
Q2
Cilt
33
Sayı
1
