Non-Destructive Identification of Defects in Power Support Structure Foundations by Means of Acoustic Techniques

Abstract:

Prefabricated power support structure foundations are made in prefabrication plants where concrete is laid in layers in moulds. The quality of the prefabricated units depends mainly on proper concrete mixture compaction, which is usually effected by means of immersion vibrators. It happens that when the vibrator is withdrawn too quickly, defects, in the form of, e.g., air voids and zones of insufficiently vibrated concrete, appear. Modern non-destructive acoustic techniques, which in recent years have been increasingly commonly used in the construction industry, are highly suitable for testing concrete elements, particularly prefabricated concrete units. The non-destructive impact-echo technique is particularly useful for determining defect location depth and for locating defective areas.

• Periodical: Key Engineering Materials (Volume 606)
• Pages: 95-98
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.606.95
• Online since: March 2014
• Authors: Lukasz Sadowski*
• Keywords: Acoustic Methods, Concrete, Impact-Echo Technique, Non-Destructive Tests, Power Support Structures, Prefabricated Foundations

References

[1] B. Goszczyńska, Analysis of the process of crack initiation and evolution in concrete with acoustic emission testing, Archives of Civil and Mechanical Engineering. 14-1 (2014) 134-143.

DOI: 10.1016/j.acme.2013.06.002

[2] M. Sansalone, W. Streett, Impact-echo: Nondestructive Evaluation of Concrete and Masonry, Bullbrier Press, Ithaca, (1997).

[3] B. Goszczyńska, G. Świt, W. Trąmpczyński, A. Krampikowska, J. Tworzewska, P. Tworzewski, Experimental validation of concrete crack identification and location with acoustic emission method, Archives of Civil and Mechanical Engineering. 12-1 (2012).

DOI: 10.1016/j.acme.2012.03.004

[4] A. Klepka, W. Staszewski, B. Jenal, M. Szwedo, J. Iwaniec, T. Uhl, Nonlinear acoustics for fatigue crack detection–experimental investigations of vibro-acoustic wave modulations, Structural Health Monitoring. 11-2 (2012) 197-211.

DOI: 10.1177/1475921711414236

[5] K. Schabowicz, Methodology for non-destructive identification of thickness of unilaterally accessible concrete elements by means of state-of-the-art acoustic techniques, Journal of Civil Engineering and Management. 19-3 (2013): 325-334.

DOI: 10.3846/13923730.2012.757562

[6] J. Hoła, L. Sadowski, K. Schabowicz, Non-destructive identification of delaminations in concrete floor toppings with acoustic methods, Automation in Construction. 20-7 (2011) 799-807.

DOI: 10.1016/j.autcon.2011.02.002

[7] L. Sadowski, Non-destructive evaluation of the pull-off adhesion of concrete floor layers using RBF neural network. Journal of Civil Engineering and Management. 19-4 (2013) 550-560.

DOI: 10.3846/13923730.2013.790838

[8] A. Ali Shaha, Y. Ribakov, Non-destructive measurements of crack assessment and defect detection in concrete structures, Materials & Design. 29-1 (2008) 61–69.

DOI: 10.1016/j.matdes.2006.12.002

[9] C. Hsiao, C. Cheng, T. Liou, Y. Juang, Detecting flaws in concrete blocks using the impact-echo method, NDT&E International. 41 (2008) 98–107.

DOI: 10.1016/j.ndteint.2007.08.008

[10] Standard test method for measuring the P-wave speed and the thickness of concrete plates using the impact-echo method, American Society for Testing and Materials, (1998).

DOI: 10.1520/c1383-04r10