Fiber-reinforced Concrete with Mineral Fibers and Nanosilica

Larisa, Urkhanova; Solbon, Lkhasaranov; Сергей, Б Васильев

doi:10.1016/j.proeng.2017.04.537

Cited by 32 publications

(18 citation statements)

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“…Common technological solutions to mitigate poor behavior under tensile load and suddenness of the failure include the introduction of reinforcing steel bars or alternatively various kinds of fibers. Most reinforcement fibers are made of minerals, glass, polymer, steel or carbon [1][2][3][4][5]. Fiber reinforcement does not necessarily lead to improvement of tensile strength, as the fibers' mechanical properties might be unsuitable; they may be below the critical fiber length or the bond between fiber and matrix might not be strong enough to support full transition of loads from one material to another, which has a significant impact on the macroscopic response [6].…”

Section: Introductionmentioning

confidence: 99%

Influence of fiber alignment on pseudoductility and microcracking in a cementitious carbon fiber composite material

et al. 2021

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This research examines the effect of fiber alignment on the performance of an exceptionally tough 3D-printable short carbon fiber reinforced cementitious composite material, the flexural strength of which can exceed 100 N/mm2. The material shows pseudoductility caused by strain-hardening and microcracking. An extrusion-based manufacturing process allows accurate control over the spatial alignment of the fibers’ orientation, since extrusion through a tight nozzle leads to nearly unidirectional alignment of the fibers with respect to the directional movement of the nozzle. Specimens were investigated using mechanical tests (flexural and tensile load), augmented by non-destructive methods such as X-ray 3D computed tomography and acoustic emission analysis to gain insight into the microstructure. Additionally, digital image correlation is used to visualize the microcracking process. X-ray CT confirms that about 70% of fibers show less than 10° deviation from the extrusion direction. Systematic variations of the fiber alignment with respect to the direction of tensile load show that carbon fibers enhance the flexural strength of the test specimens as long as their alignment angle does not deviate by more than 20° from the direction of the acting tensile stress. Acoustic emission analysis is capable of evaluating the spatiotemporal degradation behavior during loading and shows consistent results with the microstructural damage observed in CT scans. The strong connection of fiber alignment and flexural strength ties into a change from ductile to brittle failure caused by degradation on a microstructural level, as seen by complementary results acquired from the aforementioned methods of investigation.

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Section: Introductionmentioning

confidence: 99%

Influence of fiber alignment on pseudoductility and microcracking in a cementitious carbon fiber composite material

et al. 2021

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“…In recent years, the application of fiber reinforced composite (FRC) in structures has intensely promoted due to its surpassing material properties compared with conventional materials, such as its high first-crack strength, [15] high compressive and tensile strength, [16,17] high fracture toughness, [18,19] excellent energy absorption capacity, [19] and great impact resistance. [20][21][22] A wide range of fiber types including carbon fibers, [23] glass fibers, [24] metallic fibers, [25] natural fibers, [26] and polymeric fibers such as Polypropylene (PP), Polyethylene (PE), and Polyethylene terephthalate (PET) [27,28] have been utilized to bridge the cracks and to restrain the crack propagation under tensile loading, contributing to greatly improved mechanical performance [29][30][31][32][33] and environmental durability.…”

Section: Introductionmentioning

confidence: 99%

Effect of polypropylene and polyvinyl alcohol fibers on characteristics and microstructure of polymer composite

Ataabadi

Mirzaei²,

Sedaghatdoost

2021

Polymer Composites

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This study aims to assess the mechanical properties of polymer composite (PC) reinforced by introducing two types of synthetic fibers including polypropylene (PP) and polyvinyl alcohol (PVA). The optimum amount of resin was evaluated through mechanical tests. Then, selected fibers were added to the optimum mix in three fractions (0.5%, 1%, and 1.5%) by the weight of the binder. Various properties of PC which are density, compressive strength, flexural strength, modulus of elastic, and water absorption were appraised for all mix combinations after different curing times (1, 3, 7, and 28 days) beside scanning electron microscopy analysis for microstructure observation. Experimental outcomes revealed that by rising the PP fiber content, the mechanical strengths of fiber-reinforced polymer composite (FRPC) were ameliorated, where compressive and flexural strength grew 58.14% and 78.31%, respectively, at the highest fiber ratio (1.5%) compared with the plain PC. On the other hand, PC reinforced by PVA fibers represented an inverse behavior that by ascending the fiber fraction, reduction in the properties of FRPC observed.

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“…Unfortunately, the corrosion of steel fiber under chloride ion attack will seriously affect the performance of the interface area, resulting in the reduction of the performance of steel fiber reinforced concrete. Therefore, the corrosion protection of steel fiber reinforced concrete should not be ignored [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Resistance of Concrete Reinforced by Zinc Phosphate Pretreated Steel Fiber in the Presence of Chloride Ions

Zhao

Qi²,

Yang

2020

Materials

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This paper aims to provide new insight into a method to improve the chloride ion corrosion resistance of steel fiber reinforced concrete. The steel fiber was pretreated by zinc phosphate before the preparation of the fiber reinforced concrete. Interfacial bond strength, micro-hardness and micro-morphology properties were respectively analyzed in the steel fiber reinforced concrete before and after the chloride corrosion cycle test. The results show that the chloride ion corrosion resistance of the steel fiber was enhanced by zinc phosphate treatment. Compared to plain steel fiber reinforced concrete under chloride ion corrosion, the interfacial bond strength of the concrete prepared by steel fiber with phosphating treatment increased by 15.4%. The thickness of the interface layer between the pretreated steel fiber and cement matrix was reduced by 50%. The micro-hardness of the weakest point in the interface area increased by 54.2%. The micro-morphology of the interface area was almost unchanged before and after the corrosion. The steel fiber reinforced concrete modified by zinc phosphate can not only maintain the stability of the microstructure when corroded by chloride ion but also presents good bearing capacity.

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Fiber-reinforced Concrete with Mineral Fibers and Nanosilica

Cited by 32 publications

References 0 publications

Influence of fiber alignment on pseudoductility and microcracking in a cementitious carbon fiber composite material

Influence of fiber alignment on pseudoductility and microcracking in a cementitious carbon fiber composite material

Effect of polypropylene and polyvinyl alcohol fibers on characteristics and microstructure of polymer composite

Corrosion Resistance of Concrete Reinforced by Zinc Phosphate Pretreated Steel Fiber in the Presence of Chloride Ions

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