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Mechanical Characterization of High-Performance Steel-Fiber Reinforced Cement Composites with Self-Healing Effect
Materials 2014, 7(3), 2141-2154; doi:10.3390/ma7032141
Article

Self-Healing Capability of Fiber-Reinforced Cementitious Composites for Recovery of Watertightness and Mechanical Properties

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Received: 30 November 2013; in revised form: 28 February 2014 / Accepted: 10 March 2014 / Published: 13 March 2014
(This article belongs to the Special Issue Self-healing Concrete)
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Abstract: Various types of fiber reinforced cementitious composites (FRCCs) were experimentally studied to evaluate their self-healing capabilities regarding their watertightness and mechanical properties. Cracks were induced in the FRCC specimens during a tensile loading test, and the specimens were then immersed in static water for self-healing. By water permeability and reloading tests, it was determined that the FRCCs containing synthetic fiber and cracks of width within a certain range (<0.1 mm) exhibited good self-healing capabilities regarding their watertightness. Particularly, the high polarity of the synthetic fiber (polyvinyl alcohol (PVA)) series and hybrid fiber reinforcing (polyethylene (PE) and steel code (SC)) series showed high recovery ratio. Moreover, these series also showed high potential of self-healing of mechanical properties. It was confirmed that recovery of mechanical property could be obtained only in case when crack width was sufficiently narrow, both the visible surface cracks and the very fine cracks around the bridging of the SC fibers. Recovery of the bond strength by filling of the very fine cracks around the bridging fibers enhanced the recovery of the mechanical property.
Keywords: self-healing; fiber reinforced cementitious composite (FRCC); watertightness; mechanical property; synthetic fiber; steel fiber; bond strength; pull-out test self-healing; fiber reinforced cementitious composite (FRCC); watertightness; mechanical property; synthetic fiber; steel fiber; bond strength; pull-out test
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.

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MDPI and ACS Style

Nishiwaki, T.; Kwon, S.; Homma, D.; Yamada, M.; Mihashi, H. Self-Healing Capability of Fiber-Reinforced Cementitious Composites for Recovery of Watertightness and Mechanical Properties. Materials 2014, 7, 2141-2154.

AMA Style

Nishiwaki T, Kwon S, Homma D, Yamada M, Mihashi H. Self-Healing Capability of Fiber-Reinforced Cementitious Composites for Recovery of Watertightness and Mechanical Properties. Materials. 2014; 7(3):2141-2154.

Chicago/Turabian Style

Nishiwaki, Tomoya; Kwon, Sukmin; Homma, Daisuke; Yamada, Makoto; Mihashi, Hirozo. 2014. "Self-Healing Capability of Fiber-Reinforced Cementitious Composites for Recovery of Watertightness and Mechanical Properties." Materials 7, no. 3: 2141-2154.


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