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Appl. Sci. 2019, 9(8), 1537; https://doi.org/10.3390/app9081537

Curable Area Substantiation of Self-Healing in Concrete Using Neutral Axis

1
Department of Civil and Environmental Engineering, Chonnam National University, Yeosu, Chonnam-do 59626, Korea
2
Department of Civil Engineering, Pusan National University, Busan 46241, Korea
*
Author to whom correspondence should be addressed.
Received: 4 March 2019 / Revised: 21 March 2019 / Accepted: 11 April 2019 / Published: 13 April 2019
(This article belongs to the Special Issue Fatigue and Fracture of Non-metallic Materials and Structures)
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Abstract

The self-healing nature of concrete has been proved in many studies using various methods. However, the underlying mechanisms and the distinct area of self-healing have not been identified in detail. This study focuses on the limits of the area of self-healing. A bending specimen with a notch is used herein, and its flexural strength and stiffness before and after healing are compared and used for self-healing assessment. In addition, the neutral axis of the specimen was measured using successive strain gauges attached to the crack propagation part. Although the strength and stiffness of the concrete recovered after self-healing, the change in the location of the neutral axis before and after healing was insignificant, which indicates that physical recovery did not occur for once-opened crack areas. View Full-Text
Keywords: neutral axis; self-healing; successive strain gauge; flexural test neutral axis; self-healing; successive strain gauge; flexural test
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Kang, C.; Kim, T. Curable Area Substantiation of Self-Healing in Concrete Using Neutral Axis. Appl. Sci. 2019, 9, 1537.

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