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Fibers 2016, 4(1), 6;

Properties of Fiber-Reinforced Mortars Incorporating Nano-Silica

Civil Engineering Department, University of Manitoba, Winnipeg, MB, R3T 5V6, Canada
Lagan Construction, Belfast BT3 9HA, UK
Civil Engineering Department, Queen’s University Belfast, Belfast BT9 5AG, UK
Author to whom correspondence should be addressed.
Academic Editor: Mahmoud Reda Taha
Received: 12 December 2015 / Accepted: 25 January 2016 / Published: 2 February 2016
(This article belongs to the Special Issue Fiber Reinforced Polymers (FRP) for Infrastructure Applications)
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Repair and rehabilitation of deteriorating concrete elements are of significant concern in many infrastructural facilities and remain a challenging task. Concerted research efforts are needed to develop repair materials that are sustainable, durable, and cost-effective. Research data show that fiber-reinforced mortars/concretes have superior performance in terms of volume stability and toughness. In addition, it has been recently reported that nano-silica particles can generally improve the mechanical and durability properties of cement-based systems. Thus, there has been a growing interest in the use of nano-modified fiber-reinforced cementitious composites/mortars (NFRM) in repair and rehabilitation applications of concrete structures. The current study investigates various mechanical and durability properties of nano-modified mortar containing different types of fibers (steel, basalt, and hybrid (basalt and polypropylene)), in terms of compressive and flexural strengths, toughness, drying shrinkage, penetrability, and resistance to salt-frost scaling. The results highlight the overall effectiveness of the NFRM owing to the synergistic effects of nano-silica and fibers. View Full-Text
Keywords: repair; mortar; fibers; nano-silica; strength; toughness; shrinkage; durability repair; mortar; fibers; nano-silica; strength; toughness; shrinkage; durability

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Ghazy, A.; Bassuoni, M.T.; Maguire, E.; O’Loan, M. Properties of Fiber-Reinforced Mortars Incorporating Nano-Silica. Fibers 2016, 4, 6.

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