Abstract
This paper reports on damage evaluation of concrete subjected to freeze-thaw cycles using ultrasonic images. The use of automated ultrasonic inspection systems supplies velocity and attenuation maps, providing the spatial variations in velocity and attenuation in concrete specimens with high resolution. Assessment of damage in concrete specimens is conducted defining several parameters extracted from the ultrasonic images obtained before and after the freeze-thaw cycles. These parameters are related to surface scaling and internal cracking. Experimental trials were carried out using different concrete specimens with and without air-entraining agents. Comparisons between the parameters obtained from the ultrasonic images and the failure criterion defined by the standard ASTM C666/C666M-03 are performed. As a result, this work shows the feasibility of using ultrasonic images as an effective tool for evaluating freeze-thaw damage in concrete.
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References
UNE-CEN/TS 12390–9 (2008).
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Acknowledgements
The Spanish Science and Innovation Ministry and the Spanish Ministry of Public Works supported this research under grant numbers BIA 2009-14395-C04-01 and FOM 01/2007, respectively. M. Molero was supported by the department of education of the Community of Madrid, the European Social Fund, and The Mexican National Council for Science and Technology (CONACYT). S. Aparicio was supported by the postdoctoral JAE-Doc program of CSIC.
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Molero, M., Al-Assadi, G., Aparicio, S., Casati, M.J., Hernández, M.G. (2013). Damage Assessment by Ultrasonic Images in Concrete Subjected to Freeze-Thaw Cycles. In: Güneş, O., Akkaya, Y. (eds) Nondestructive Testing of Materials and Structures. RILEM Bookseries, vol 6. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-0723-8_32
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DOI: https://doi.org/10.1007/978-94-007-0723-8_32
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