Influence of the rheological properties on the steel fibre distribution and orientation in self-compacting concrete

Jasiūnienė, Elena; Cicėnas, Vaidotas; Grigaliūnas, Paulius; Rudžionis, Žymantas; Navickas, Arūnas Aleksandras

doi:10.1617/s11527-018-1231-y

Cited by 20 publications

(8 citation statements)

References 53 publications

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“…The reorientation of fibres is more pronounced in flows with higher velocity and is therefore related to the casting rate and potential energy [12]. Although the time taken for fibres to reorient has been reported to be considered instantaneous on a larger scale [6], this follows an inverse relation relative to the shear rate of cementitious composite flow [11].…”

Section: Experimental Programmementioning

confidence: 99%

“…The efficiency of fibres decreases from 100% when aligned along the direction of tensile stress to 30% when randomly distributed [11]. A random fibre orientation can be beneficial for members acting without a preferential stress field [12]. Therefore, it is important to properly understand and control the factors related to fibre orientation to ensure that the required or even enhancedmaterial and structural performance is obtained for real applications [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Monitoring steel fibre orientation in self-compacting cementitious composite slabs during pouring with dynamic X-ray radiography

Marks

Miletić

Lee

et al. 2021

Cement and Concrete Research

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Section: Experimental Programmementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Monitoring steel fibre orientation in self-compacting cementitious composite slabs during pouring with dynamic X-ray radiography

Marks

Miletić

Lee

et al. 2021

Cement and Concrete Research

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“…From Equation (19), we established that the 28 d-flexural strength of UHPC significantly change with fiber dispersion and orientation coefficients. When the fiber dispersion or orientation coefficients were small, the 28 d-flexural strength of UHPC was small, and vice versa.…”

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

confidence: 99%

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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“…According to research on the effect of steel fibers on the rheology of steel fiber-reinforced concrete, the addition of steel fibers increased the yield stress and plastic viscosity as the amount of steel fiber increased, the aspect ratio of the fiber increased, and the diameter of the fiber increased [ 26 , 27 ]. However, in experimental results of the effect of the rheology of steel fiber-reinforced self-compacting concrete on the direction and distribution of steel fibers, it was found that the lower the viscosity, the more steel fiber segregation occurred [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Changes in Rheological Properties of Mortars with Steel Slags and Steel Fibers by Magnetic Field

Kang¹,

Moon

Kim

2021

Materials

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The effect of a magnetic field on the rheology of mortars with steel slags and fibers was evaluated in this study. The rheology of the mortar measured with and without a magnetic field was compared. The effect of steel fiber addition to normal and steel slag mortars, mix ratio and size of steel fibers, and magnetic field formation position on rheology were evaluated. Steel fiber addition increased the yield stress and viscosity of the normal and steel slag mortars. The increased rheology was almost restored because of the magnetic field applied to the normal mortars. However, the increased rheology of the steel slag mortars with steel fibers was restored only upon the application of the magnetic field, whose position was continuously changed by a power relay. It is deduced that the alignment of the steel fibers by the magnetic field contributes to the rheology reduction of the mortars. However, in the case of steel slag mortar, experimental results demonstrated that steel slag, which is a ferromagnetic material, receives constant force by the magnetic field, which increases the rheology. This is evidenced by the decrease in the rheology of steel slag mortars under a continuously changing magnetic field formation position by power relay.

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Influence of the rheological properties on the steel fibre distribution and orientation in self-compacting concrete

Cited by 20 publications

References 53 publications

Monitoring steel fibre orientation in self-compacting cementitious composite slabs during pouring with dynamic X-ray radiography

Monitoring steel fibre orientation in self-compacting cementitious composite slabs during pouring with dynamic X-ray radiography

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

Changes in Rheological Properties of Mortars with Steel Slags and Steel Fibers by Magnetic Field

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