Influence of steel fiber on compressive properties of ultra-high performance fiber-reinforced concrete

Yang, Jian; Chen, Baochun; Nuti, Camillo

doi:10.1016/j.conbuildmat.2021.124104

Cited by 66 publications

(12 citation statements)

References 39 publications

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“…Short vibration intervals alleviated the aggregation of steel fibers in UHPC mixtures, enlarging the fiber dispersion coefficient and contributing to uniform fiber distribution. Thus, there is an increase in the concrete elastic modulus, consistent with that in [29]. The microcrack bridging ability of steel fiber and compressive strength is also improved, consistent with that in [30].…”

Section: Effects Of Fiber Distribution Characteristics On Compressive...supporting

confidence: 78%

Effects of vibrating compaction time on fiber and aggregate distribution and strength of ultra-high performance concrete

Liu

Wang

et al. 2023

Preprint

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In this study, we investigated the settling velocity and distribution between steel fiber and aggregate during vibrating compaction of ultra-high performance concrete (UHPC) mixtures. In addition, we explored the effect of fiber distribution characteristics on the UHPC strength. Based on Stokes’ theorem and considering the vibration effect, a method for calculating the settling velocity of steel fiber and aggregate in UHPC mixtures during vibrating compaction was proposed. The fiber/aggregate dispersion coefficient based on the proposed method decreased gradually with time. The experimentally obtained fiber dispersion coefficient first increased and then decreased, with the maximum value appearing at 5 s. In contrast, the fiber orientation coefficient gradually increased with time. Moreover, following vibration excitations at different times, the fiber dispersion coefficient increased and the fiber orientation coefficient decreased as the yield stress and plastic viscosity of the UHPC mixtures increased. In the vibration range of 0–15 s, the compressive and flexural strength of UHPC first increased and then decreased, with the maximum values appearing at 5 and 10 s, respectively. The compressive strength was affected by the fiber dispersion coefficient, whereas the flexural strength was affected by the fiber dispersion and orientation coefficients. Furthermore, the relational expression between compressive/flexural strengths of UHPC and fiber dispersion and orientation coefficients were presented.

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Section: Effects Of Fiber Distribution Characteristics On Compressive...supporting

confidence: 78%

Effects of vibrating compaction time on fiber and aggregate distribution and strength of ultra-high performance concrete

Liu

Wang

et al. 2023

Preprint

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“…Numerous authors conclude that the addition of fibers, as well as an increase in their content, do not necessarily improve the compressive strength of concrete [19][20][21]. This is explained by the balance between two opposing effects: on the one hand, the positive effect of the bridging forces generated by the fibers, which reduces the occurrence and growth of cracks and on the other hand, the negative effect of the reduction of fluidity that they induce, increasing porosity.…”

Section: Compressive Strengthmentioning

confidence: 99%

Mechanical behavior of high-strength steel fiber-reinforced concrete

Mena-Alonso,

C. González,

Mínguez

et al. 2024

Fiber-Reinforced Composites - Recent Advances, New Perspectives and Applications

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Steel fiber-reinforced concrete (SFRC) is a composite material, consisting of conventional concrete with the addition of short, randomly distributed steel fibers. Fibers modify the mechanical behavior of concrete, improving some of its properties: they increase its ductility, enhance its residual tensile strength, and under certain conditions, increase its ultimate flexural strength. All these advantages make this material competitive with conventional reinforced concrete. However, the psychological barriers of the construction sector and the technical challenges that remain to be solved are slowing down the consolidation of this building material. One of these challenges is the improvement of the understanding of fatigue, which not only affects SFRC, but concrete in general. In this regard, work to date suggests that fibers, given certain circumstances, increase the fatigue life of concrete. This would result in SFRC being very effective in structures where fatigue is a critical action, such as wind turbine concrete towers.

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“…In general, steel fbres are recognized for their good bridging efect, better tensile properties, proven impact resistance, and arresting of crack propagation characteristics [38][39][40], and so they can be utilized to enhance the durability characteristics as they help in reducing propagation of cracks. Te diverse mechanical properties of concrete prepared with NS individually and combined with NS and MWCNTs, for various amounts of nanomaterials, diferent curing periods, and incorporation of steel fbres, were discussed by Sumathi et al in their study [41][42][43], and the authors in their research using steel fbres indicated that incorporation of 1% improved the mechanical and structural properties of high-strength concrete.…”

Section: Use Of Steel Fibres Along With Mwcntmentioning

confidence: 99%

Mechanical, Durability, and Microstructure Investigations on High-Strength Concrete Incorporating Nanosilica, Multi-Walled Carbon Nanotubes, and Steel Fibres

Sumathi

Elavarasi

Karthikeyan

et al. 2023

Advances in Materials Science and Engineering

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In present research, the strength properties, impact resistance, and durability characteristics of high-strength concrete blended with nanosilica (NS) and reinforced with multi-walled carbon nanotubes (MWCNTs) are discussed. The proportion consists of nanosilica added in a constant addition of 1% and MWCNT added in a varied dosage of 0.025%, 0.05%, 0.1%, 0.15%, and 0.2% by weight of the cement. A total of 11 mixes were made including the control mix having no MWCNT. The other 10 mixes were categorized into two classes with one class having steel fibres incorporated as 1% of the total volume of the concrete along with the other ingredients such as 1% NS and different proportions of MWCNT. The other class was made without steel fibres retaining only the NS and different MWCNT proportions. Besides the standard compression and tension tests, to determine the energy absorbing capacity of the mix specimens, impact test was also performed. The strength tests were carried out for 3, 7, and 28-day curing. Also, durability tests were carried out with sorptivity, porosity, and mass loss of the specimens when exposed to aggressive HCL and H2SO4 acid. To validate the experiment results, microstructure studies such as scanning electron microscopy (SEM) were also conducted on the samples. Among all mixes, 28-day compressive strength (CS) of 0.2% MWCNT with 1% NS and 1% steel fibre mix was found to increase by 22% compared to control concrete.

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Influence of steel fiber on compressive properties of ultra-high performance fiber-reinforced concrete

Cited by 66 publications

References 39 publications

Effects of vibrating compaction time on fiber and aggregate distribution and strength of ultra-high performance concrete

Effects of vibrating compaction time on fiber and aggregate distribution and strength of ultra-high performance concrete

Mechanical behavior of high-strength steel fiber-reinforced concrete

Mechanical, Durability, and Microstructure Investigations on High-Strength Concrete Incorporating Nanosilica, Multi-Walled Carbon Nanotubes, and Steel Fibres

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