Hybrid-fibre-reinforced concrete containing multi-wall carbon nanotubes

Sadeghi, Alireza Mohammadjafari; Esmaeili, Jamshid

doi:10.1680/jstbu.18.00180

Cited by 6 publications

(3 citation statements)

References 36 publications

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“…Some, recommended microfiber contents of 1.5% 12 while others suggested contents of 0.5% 11 . The ratio of macro to micro steel fiber content in the hybrid steel fiber reinforced RPC is selected 1 to 1 according to previous studies 31,33,36 . Due to the high impact of microfibers on the flow of fresh concrete and to compare the effects of fiber types and contents on the workability and mechanical properties of RPC, 0.5 and 1.5% fiber volume fractions were selected in this study.…”

Section: Experimental Studymentioning

confidence: 99%

“…In all cases, dry mixing methods were suggested for dispersing non-steel microfibers. Given the positive results reported in previous research on the optimum effect of hybrid fibers on the properties of concrete, [29][30][31][32][33][34][35][36] it is also necessary to investigate the effect of hybrid fibers on the mechanical properties of RPC.…”

Section: Introductionmentioning

confidence: 99%

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Experimental study on the effect of macro and microfibers on the mechanical properties of reactive powder concrete

Mizani

Sadeghi

Afshin

2020

Structural Concrete

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Due to the outstanding mechanical properties of the reactive powder concrete (RPC), it has attracted a great deal of attention. In which, incorporating fibers can improve its behavior and properties. The main objectives of this study were to consider different mixing methods and the effect of fiber content and type on the mechanical properties of RPC. The best mix proportion was selected for the final tests among 13 initial mix designs based on the 7‐day compressive strength and flow value of the fresh concrete. Different macro and microfibers (including steel, polyvinyl alcohol, glass, carbon, and basalt fibers) with volume fractions of 0.5% and 1.5% were added to the final RPC mix by two different mixing methods, and mechanical properties such as compressive, tensile, and flexural strengths and energy absorption capability were investigated. Based on the results of experiments, the addition of 1.5% hybrid (macro and micro) steel fibers had the most positive effect on increasing the mechanical properties of RPC compared to other fibers. The hybrid fibers increased the compressive, tensile, and flexural strengths and flexural toughness of the specimens by 42.5%, 26.9%, 87.6%, and 396%, respectively. According to the results, the addition of 0.5% fibers to RPC did not significantly enhance the mechanical properties of the concrete.

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Section: Experimental Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental study on the effect of macro and microfibers on the mechanical properties of reactive powder concrete

Mizani

Sadeghi

Afshin

2020

Structural Concrete

Self Cite

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show abstract

“…In order to achieve a level of performance that is superior to that of FRC, hybrid fibre, a relatively new innovation, involves the mixing two or more kinds of fibres in concrete [ 19 , 20 , 21 , 22 ]. With the use of hybrid fibres, the characteristics of concrete can be improved in both fresh and hardened conditions [ 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Behaviour of Hybrid Fibre-Reinforced Ternary Blend Geopolymer Concrete Beam-Column Joints under Reverse Cyclic Loading

et al. 2022

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Beam–column joints are extremely vulnerable to lateral and vertical loads in reinforced concrete (RC) structures. This insufficiency in joint performance can lead to the failure of the whole structure in the event of unforeseen seismic and wind loads. This experimental work was conducted to study the behaviour of ternary blend geopolymer concrete (TGPC) beam-column joints with the addition of hybrid fibres, viz., steel and polypropylene fibres, under reverse cyclic loads. Nine RC beam-column joints were prepared and tested under reverse cyclic loading to recreate the conditions during an earthquake. M55 grade TGPC was designed and used in this present study. The primary parameters studied in this experimental investigation were the volume fractions of steel fibres (0.5% and 1.0%) and polypropylene fibres, viz., 0.1 to 0.25%, with an increment of 0.05%. In this study, the properties of hybrid fibre-reinforced ternary blend geopolymer concrete (HTGPC) beam-column joints, such as their ductility, energy absorption capacity, initial crack load and peak load carrying capacity, were investigated. The test results imply that the hybridisation of fibres effectively enhances the joint performance of TGPC. Also, an effort was made to compare the shear strength of HTGPC beam-column connections with existing equations from the literature. As the available models did not match the actual test results, a method was performed to obtain the shear strength of HTGPC beam-column connections. The developed equation was found to compare convincingly with the experimental test results.

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Effectiveness of using nanoparticles in green composites: A scientometric analysis of fresh, mechanical, durability, and microstructural features

Raza,

Ahmed,

Khan

et al. 2023

Construction and Building Materials

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Hybrid-fibre-reinforced concrete containing multi-wall carbon nanotubes

Cited by 6 publications

References 36 publications

Experimental study on the effect of macro and microfibers on the mechanical properties of reactive powder concrete

Experimental study on the effect of macro and microfibers on the mechanical properties of reactive powder concrete

Behaviour of Hybrid Fibre-Reinforced Ternary Blend Geopolymer Concrete Beam-Column Joints under Reverse Cyclic Loading

Effectiveness of using nanoparticles in green composites: A scientometric analysis of fresh, mechanical, durability, and microstructural features

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