International Science Index


Evaluation of the Accuracy of Time of Arrival Source Location Algorithm of Acoustic Emission in Concrete-Mortar Structure


Acoustic Emission (AE) is one of the most effective non-destructive tests that can be used to detect the defect process as it is occurring. AE techniques can be used to monitor a wide range of structures and materials such as metals, non-metals and combinations of these when load is applied. The current work investigates the effectiveness and accuracy of TOA method in AE tests involving reinforced composite concrete-mortar structures. A series of experimental tests were performed using the Hsu-Neilson (H-N) source to study 2-D location accuracy using this method on concrete-mortar (400×400 mm) specimens. Four AE sensors (R3I – resonant frequency 30 kHz) were mounted to the mortar surface and six sources were performed at each point of preselected locations on the upper surface of the mortar. Results show that the TOA method can be used effectively to locate signals on composite concrete/mortar specimen and has high accuracy.

[1] R. K. Miller, and E. V. K. Hill, Non-destructive Testing Handbook, vol. 6, Acoustic Emission Testing, USA, 2005.
[2] R. Miller, R. Hill, and P.O. Moore, Nondestructive Testing Handbook, 3rd Ed. Vol. 6, Acoustic Emission Testing, American Society for Nondestructive Testing. Inc., USA, 2005.
[3] H. Elfergani, K. Holford, and R. Pullin. "Monitoring Corrosion Activity of Steel Reinforcement Using Acoustic Emission", 2nd International Conference on Geological and Civil Engineering, IPCBEE vol. 80, 2015.
[4] ASTM E610. Standard Definition of Terms Relating to Acoustic Emission, American Society for Testing and Materials, 1982.
[5] M. Baxter, Damage assessment by Acoustic Emission (AE) during landing gear fatigue testing, Cardiff School of Engineering, Cardiff University, 2007.
[6] N. M. Bunnori, Acoustic Emission Techniques for the Damage Assessment of Reinforced Concrete Structures, Cardiff School Engineering, Cardiff University, 2008.
[7] C. J. Hellier, Handbook of Non-destructive Evaluation, McGraw-Hill, USA, 2001.‎
[8] M. Eaton, Acoustic Emission (AE) monitoring of buckling ‎and failure in carbon fibre composite structures, Cardiff School of Engineering, Cardiff University, 2007.
[9] K.M. Holford, "Acoustic Emission-Basic Principles and Future Directions", Strain, Vol.36, no.2, 2000.
[10] P. Beck, Quantitative damage assessment of concrete structures using acoustic emission, Cardiff School of Engineering, University of Wales, Cardiff, 2004.
[11] D. Giannoulakis, Acoustic Emission Technology for Detection of Minor Damage in RC Structures, Cardiff School of Engineering, Cardiff University, 2008.
[12] R. Pullin, Structural Integrity Monitoring of Steel Bridges Using Acoustic Emission Techniques, Cardiff School of Engineering, Cardiff University, 2001.
[13] A. A. Pollock, "Classical Wave Theory in Practical AE Testing", Progress in Acoustic Emission III, the Japanese of NDI, 1986.
[14] J. A. Baron, and S.P. Ying, Acoustic Emission Source Location, Nondestructive Testing Handbook, American Society for Non-destructive Testing, Columbus, OH,5,6, pp 136-154, 1987.
[15] R.K. Miller, and P. Mclntire, Acoustic Emission Testing. NDT Handbook, 2nd ed, Vol. 5, American Society for Nondestructive Testing, pp. 151, 1987.
[16] H. Elfergani, R. Pullin, and K. Holford. "Damage assessment of corrosion in prestressed concrete by acoustic emission", Construction & Building Materials Journal, Vol.40 pp. 925–933, 2013.
[17] ASTM C876-91. Standard Test Method for Half-Cell Potentials of Uncoated Reinforcing Steel in Concrete, American Society for Testing and Materials, 1999.