where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -
NDT.net Issue - 2010-10 - Articles
NDT.net Issue: 2010-10
Publication: e-Journal of Nondestructive Testing (NDT) ISSN 1435-4934 (NDT.net Journal)
ARTICLE

Use of Ultrasound to Estimate Depth of Surface Opening Cracks in Concrete Structures

Roberto C. A. Pinto4, Arthur Medeiros, Ivo J. Padaratz3, Patrícia B. Andrade
Civil Engineering Department; Federal University of Santa Catarina (UFSC)19, Florianópolis, Brazil

Abstract: This study discusses the use of the ultrasound with the time-of-flight diffraction technique to estimate the depth of surface opening cracks. This technique is a very useful tool for practical applications. It is inexpensive, simple and easy to perform, giving a rapid indication of the extension of cracking. BS 1881:Part 203 presents some mathematical expressions to estimate the depth of surface opening cracks. These expressions are based on two time-of-flight measurements performed using the indirect mode of transmission. However, BS 1881:Part 203 indicates that when such a mode of transmission is used, it is required at least four measurements to be able to estimate the ultrasound pulse velocity (UPV). Due to this apparent incoherence, two graphically-based methods were developed, allowing for the use of several time-of-flight readings. All of these aforementioned methods were applied to estimate the depth of surface opening cracks of artificially cracked samples produced in the laboratory. The results indicated that the new developed methods can estimate vertical cracks with an error of 10%; a smaller value compared to the error of 15% obtained for the BS 1881 method.

Keywords: Ultrasonic Testing (UT) (4107), civil engineering (1026), concrete (521), crack depth (48), time of flight (37),
*Keywords are freely formed keywords from the authors and thus you may Search also for similar terms.

View:  


Feedback: ()

Share:
More from "Roberto C. A. Pinto" (3)
2014-12 Use of Ultrasonic Tomography in the Evaluation of Timber Structures
2011-12 Use of impact-echo in concrete plates with small thicknesses and different kind of cure
2011-08 The Use of Impact-Echo in Concrete Plates with Very Small Thicknesses
... All 3 Details >
More from "Ivo J. Padaratz" (2)
2011-12 Use of impact-echo in concrete plates with small thicknesses and different kind of cure
2011-08 The Use of Impact-Echo in Concrete Plates with Very Small Thicknesses
... All 2 Details >
More from "Federal University of Santa Catarina (UFSC)" (5 of 18)
2017-03CT applied as a reference technique for evaluating active lock-in thermography in characterizing CFRP impact damage test samples
2017-02Comparison of surface-based and image-based quality metrics for the analysis of dimensional computed tomography data
2016-02Experimental Investigation of the Influence Factors on the Structural Resolution for Dimensional Measurements with CT Systems
2015-05Evaluation of frescoes detachments by partial least square thermography
2015-05Comparative study of Thermographic Signal Reconstruction and Partial Least Squares Thermography for detection and evaluation of subsurface defects
... All 18 Details >
Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window