Ahn Eunjong, Kim Hyunjun, Sim Sung-Han, Shin Sung Woo, Shin Myoungsu
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.
Materials (Basel). 2017 Mar 10;10(3):278. doi: 10.3390/ma10030278.
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.
近年来，自修复技术已成为延长混凝土建筑领域社会基础设施使用寿命的一种有前景的方法。然而，目前对为胶凝材料开发的自修复技术的评估大多局限于实验室规模的实验，以检查表面裂缝宽度的变化（通过光学显微镜）和渗透性。此外，普遍缺乏统一的测试方法来评估自修复技术的有效性。特别是对于实际施工中应用的混凝土自修复，需要无损测试方法以避免中断正在评估的结构的使用。本文综述了关于超声测试方法原理的所有现有研究以及与自修复混凝土相关的案例研究。该研究的主要目的是检验各种超声测试方法在评估自修复性能方面的适用性和局限性。最后，提出了关于自修复胶凝材料可靠评估方法发展的未来方向。
