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Materials 2014, 7(1), 508-526; doi:10.3390/ma7010508

Mechanical Characterization of High-Performance Steel-Fiber Reinforced Cement Composites with Self-Healing Effect

1
Department of Civil and Environmental Engineering, Sejong University, 98 Gunja-Dong, Gwangjin-Gu, Seoul 143-747, Korea
2
Innovative Construction Materials Engineering, Institute of Industrial Science, The University of Tokyo, 153-8505, Japan
*
Author to whom correspondence should be addressed.
Received: 10 December 2013 / Revised: 2 January 2014 / Accepted: 7 January 2014 / Published: 20 January 2014
(This article belongs to the Special Issue Self-healing Concrete)
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Abstract

The crack self-healing behavior of high-performance steel-fiber reinforced cement composites (HPSFRCs) was investigated. High-strength deformed steel fibers were employed in a high strength mortar with very fine silica sand to decreasing the crack width by generating higher interfacial bond strength. The width of micro-cracks, strongly affected by the type of fiber and sand, clearly produced the effects on the self-healing behavior. The use of fine silica sand in HPSFRCs with high strength deformed steel fibers successfully led to rapid healing owing to very fine cracks with width less than 20 µm. The use of very fine silica sand instead of normal sand produced 17%–19% higher tensile strength and 51%–58% smaller width of micro-cracks. View Full-Text
Keywords: self-healing; fiber reinforcement; bond strength; composite; crack detection self-healing; fiber reinforcement; bond strength; composite; crack detection
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Kim, D.J.; Kang, S.H.; Ahn, T.-H. Mechanical Characterization of High-Performance Steel-Fiber Reinforced Cement Composites with Self-Healing Effect. Materials 2014, 7, 508-526.

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