Properties of Fiber-Reinforced Mortars Incorporating Nano-Silica

Ghazy, Ahmed; Bassuoni, M. T.; Maguire, Eugene; O’Loan, Mark

doi:10.3390/fib4010006

Cited by 31 publications

(42 citation statements)

References 40 publications

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“…However, concrete also has disadvantages such as a low tensile strength, poor toughness, and high brittleness, which adversely affect the safety, applicability, and durability of the concrete structure [2]. Many studies have shown that the mechanical properties and durability of concrete can be effectively improved by incorporating fibers into it, thus obtaining fiber-reinforced concrete for high strength, toughness, and durability [3,4].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Mechanical Properties and Fractal Dimension of Pore Structure of Basalt–Polypropylene Fiber-Reinforced Concrete

et al. 2019

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This study investigates the effects of basalt–polypropylene fibers on the compressive strength and splitting tensile strength of concrete and calculates the fractal dimension of the pore structure of concrete by using a fractal model based on the optical method. Test results reveal that hybrid fibers can improve the compressive strength and splitting tensile strength of concrete, and the synergistic effect of the hybrid fibers is strongest when the contents of basalt fiber (BF) and polypropylene fiber (PF) are 0.05% each, and that the maximum increments in compressive strength and splitting tensile strength are 5.06% and 9.56%, respectively. The effect of hybrid fibers on splitting tensile strength is greater than on compressive strength. However, hybrid fibers have adverse effects on mechanical properties when the fiber content is too high. The pore structure of basalt–polypropylene fiber-reinforced concrete (BPFRC) exhibits obvious fractal characteristics, and the fractal dimension is calculated to be in the range of 2.297–2.482. The fractal dimension has a strong correlation with the air content and spacing factor: the air content decreases significantly whereas the spacing factor increases with increasing fractal dimension. In addition, the fractal dimension also has a strong positive correlation with compressive strength and splitting tensile strength. Therefore, the fractal dimension of the pore structure can be used to evaluate the microscopic pore structure of concrete and can also reflect the influence of the complexity of the pore structure on the macroscopic mechanical properties of concrete.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Mechanical Properties and Fractal Dimension of Pore Structure of Basalt–Polypropylene Fiber-Reinforced Concrete

et al. 2019

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“…Li, 2003;Li et al, 2010;Lepech and Li, 2010;Zhu, 2013). More recently, FRCC has been developed using high performance cementitious matrices incorporating nanosilica particles (Ghazy et al 2016a, Mahmoud et al 2017 for various infrastructure applications.…”

Section: Introductionmentioning

confidence: 99%

Nano-modified cementitious composites with high volume supplementary cementitious materials incorporating basalt fiber pellets

Azzam¹,

Bassuoni²,

Shalaby³

2019

Sustainable Construction Materials and Technologies (SCMT)

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In this study, high performance nano-modified cementitious composites were developed. These composites incorporate 50% fly ash or slag (industrial by-products) replacement of the cement component, 6% nano-silica sol and a new type of basalt fiber strands encapsulated by polymeric resins termed as basalt fiber pellets. The fresh and mechanical properties were investigated for the developed composites with different dosages of basalt pellets (2.5%, 4.5% and 6.9% by volume). Generally, the slag based composites showed improved performance compared to the fly ash based composites. Although the compressive strength of the specimens was reduced with increasing the dosage of pellets, the flexural performance of the composites was significantly enhanced in terms of post-cracking behavior, residual strength and toughness. Composites comprising 4.5% and 6.9% pellets exhibited deflectionhardening behavior. Hence, they have a promising potential for many infrastructure applications.

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“…The deflection ductility of a brittle matrix (such as cement mortar) is improved with the addition of discontinuous fibres [17] and its flexural ductile behavior gives early warning signs aiding in the prevention of sudden, unexpected, and catastrophic failures of the structural elements in question [18]. Deflection ductility of a structural element (slab, beam) is determined by experiments employing simple flexural tests [17][18] based on mid-span deflection [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…Deflection ductility of a structural element (slab, beam) is determined by experiments employing simple flexural tests [17][18] based on mid-span deflection [19][20][21]. Previous studies [1], [5], [10][11][12], [22][23] have shown that deflection ductility behavior is characterized by the ability to sustain higher levels of loading after the first cracking while undergoing a large deformation [17]. The deflection ductility at the first crack and the ultimate load bearable in cement-based composites depends upon element thickness, type of reinforcement (mesh and/ or fibres), and the volume fraction (percentage) of mesh and fibres [1], [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Deflection Ductility of Slabs Made of Hybrid Mesh-And-Fibre-Reinforced Cementbased Composite

Sakthivel

2017

Archives of Civil Engineering

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Steel Mesh-Reinforced Cementitious Composites (SMRCC) (traditionally known as ferrocement) have been in existence for few decades, but have some limitations set on element thickness and number of reinforcing mesh layers and the resulting deflection ductility. Therefore, the author has made an attempt to explore whether deflection ductility will improve in mesh-reinforced cementitious composites (25 mm thick) if discontinuous fibres are added to slab elements. were analyzed. From the flexural load-deflection curves it has been observed that HMFRCBC slabs demonstrate higher flexural load-carrying capacity and deflection ductility when compared to SMRCC slabs. This study shows that higher the polyolefin fibre volume fraction (PO-FVf) from 0.5 to 2.5% (with a 0.5% interval) in HMFRCBC slabs, the higher the flexural deflection ductility. The Deflection Ductility Index (DDI) of HMFRCBC (with 5 layers of mesh and PO-FVf=2.5%) is 4.5 times that of SMRCC. This study recommends that HMFRCBC can be used as an innovative construction material due to its higher flexural ductility characteristics.

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Properties of Fiber-Reinforced Mortars Incorporating Nano-Silica

Cited by 31 publications

References 40 publications

Experimental Study on Mechanical Properties and Fractal Dimension of Pore Structure of Basalt–Polypropylene Fiber-Reinforced Concrete

Experimental Study on Mechanical Properties and Fractal Dimension of Pore Structure of Basalt–Polypropylene Fiber-Reinforced Concrete

Nano-modified cementitious composites with high volume supplementary cementitious materials incorporating basalt fiber pellets

Deflection Ductility of Slabs Made of Hybrid Mesh-And-Fibre-Reinforced Cementbased Composite

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