Analyzing two different data processing strategies for monitoring concrete structures using ultrasonic pulse velocity
Abstract
The increasing number of early deterioration symptoms found in relatively new concrete structures provides a strong argument for the development and validation of techniques to monitor the condition state of concrete elements and provide data to estimate the potential service life. The use of NDT monitoring techniques is an important way to prevent and control the deterioration of concrete structures without damaging the material. Ultrasonic Pulse Velocity (UPV) measurements seem to be a quite effective way to perform quality control, since this reliable and flexible test method allows an in-depth analysis of the material’s condition. Using UPV data it is possible to check the concrete uniformity, accompany the deterioration, detect internal flaws and voids and, by means of a comparison with reference specimens, even estimate the compressive strength. The results indicate that surface mapping seems to be a better way to
analyze and visualize UPV results.
Keywords: concrete; ultrasonic methods; surface mapping; statistical analysis
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References
ANNUAL BOOK OF ASTM STANDARDS, ASTM E 114-95 (1995), Standard Practice for Ultrasonic Pulse-Echo Straight-Beam Examination by the Contact Method, Vol. 03.03 Nondestructive Testing, (West Conshohocken, USA: ASTM): 920 p., p. 12-15.
ASNT (2012). Introduction to Nondestructive Testing. The American Society for Nondestructive Testing. http://www.asnt.org/.
Buyle-bodin F., Ammouche A., Garciaz J. (2003), Contribution of coupling non-destructive methods for the diagnosis of concrete structures. in: International Symposium Non-Destructive Testing in Civil Engineering. http://www.ndt.net, Berlin: (Germany).
Lorenzi A., Silva Filho L. C. P, Campagnolo J. L., Strieder A. J., Caetano L. F. (2004), Using Non-Destructive Testing for Monitoring Concrete Elements of Sizable Structural Members, in: Proc. Structural Materials Technology (SMT): NDE/NDT for Highways and Bridges. Buffalo: (USA). CD-ROM.
Lorenzi A., Caetano L. F., Silva Filho L. C. P. (2003), Redes Neurais Artificiais para Avaliação dos Resultados de Ensaios Ultrassônicos em Concreto. in Proc. Congresso Latino-americano de Patologia das Construções. Mérida: (México). CD-ROM.
Lorenzi A., Caetano L. F., Silva Filho L. C. P. (2005), Using Ultrasonic Pulse Velocity for Monitoring Concrete Structures. in: Proc. The Third U.S.-Japan Symposium on Advancing Applications and Capabilities. Maui: (USA). CD-ROM.
Lorenzi A., Silva Filho L. C. P., Campagnolo J. L. (2004), Using a Back-Propagation Algorithm to Create a Neural Network for Interpreting Ultrasonic Readings of Concrete. in: Proc. 16º World Conference on Nondestructive Testing,. Montreal: (Canada). CD-ROM.
Meneghetti L. C., Padaratz I. J., Steil R. O. (1999), Use of Ultrasound to Evaluate Concrete Strength in the Early Ages. in International Symposium on Nondestructive Testing Contribution to the Infrastructure Safety Systems in the 21st Century. Torres: (Brazil).
Naik T. R., Malhotra (1991), V. M., The ultrasonic pulse velocity method, in: Malhotra V. M., Carino N. (Editor), Handbook on Nondestructive Testing of Concrete, (Boca Raton, Florida, USA): CRC Press, 1991, 343 p.
Nesvijski E. G. (2003), Dry Point Contact Transducers: Design for New Applications, The eJournal of Nondestructive Testing, vol. 9, n. 9,. http://www.ndt.net, Berlin: (Germany).
Nesvijski E. G. (2001), On Raleigh Equation and Accuracy of its Real Roots Calculations. Journal of Thermoplastic Composite Materials: vol. 14, n. 5.
Nesvijski E. G., Nesvijski T. C., Lorenzi A. (2000), Differential Approach to Ultrasonic Testing of Strength and Homogeneity of Concrete. in International Conference on NDT in Civil Engineering. Tokyo: (Japan).
Nogueira C. L. (2002), Análise Ultra-Sônica da Distribuição dos Agregados no Concreto através de Wavelets, in Proc. XXI Congresso Nacional de Ensaios não Destrutivos. Salvador: (Brazil).
Popovics S. (1998), Strength and Related Properties of Concrete - A Quantitative Approach, (New York, USA: John Wiley and Sons), 535p.
Popovics S. (1999), Educational and Research Problems of NDE of Concrete Structures. in International Symposium on Nondestructive Testing Contribution to the Infrastructure Safety Systems in the 21st Century. Torres: (Brazil).
Qasrawi H. (2002), Concrete Strength by Combinated Nondestructive Methods – Simple and Reliably Predicted, Cement and Concrete Research 30: pp. 739-746.
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