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Materials 2017, 10(3), 278;

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

School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
Department of Safety Engineering, Pukyong National University, Pusan 48513, Korea
Authors to whom correspondence should be addressed.
Academic Editor: Nele De Belie
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)
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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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