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Principles and Applications of Ultrasonic-Based Nondestructive Methods for Self-Healing in Cementitious Materials

1
School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
2
Department of Safety Engineering, Pukyong National University, Pusan 48513, Korea
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Authors to whom correspondence should be addressed.
Academic Editor: Nele De Belie
Materials 2017, 10(3), 278; https://doi.org/10.3390/ma10030278
Received: 13 January 2017 / Revised: 22 February 2017 / Accepted: 8 March 2017 / Published: 10 March 2017
(This article belongs to the Special Issue Self-Healing Concrete)
Recently, self-healing technologies have emerged as a promising approach to extend the service life of social infrastructure in the field of concrete construction. However, current evaluations of the self-healing technologies developed for cementitious materials are mostly limited to lab-scale experiments to inspect changes in surface crack width (by optical microscopy) and permeability. Furthermore, there is a universal lack of unified test methods to assess the effectiveness of self-healing technologies. Particularly, with respect to the self-healing of concrete applied in actual construction, nondestructive test methods are required to avoid interrupting the use of the structures under evaluation. This paper presents a review of all existing research on the principles of ultrasonic test methods and case studies pertaining to self-healing concrete. The main objective of the study is to examine the applicability and limitation of various ultrasonic test methods in assessing the self-healing performance. Finally, future directions on the development of reliable assessment methods for self-healing cementitious materials are suggested. View Full-Text
Keywords: self-healing concrete; performance evaluation; nondestructive test; ultrasound self-healing concrete; performance evaluation; nondestructive test; ultrasound
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Ahn, E.; Kim, H.; Sim, S.-H.; Shin, S.W.; Shin, M. Principles and Applications of Ultrasonic-Based Nondestructive Methods for Self-Healing in Cementitious Materials. Materials 2017, 10, 278.

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