Investigation of engineering properties of steel fiber reinforced concrete exposed to homogeneous magnetic field

Hajforoush, Mohammad; Kheyroddin, Ali; Rezaifar, Omid

doi:10.1016/j.conbuildmat.2020.119064

Cited by 30 publications

(13 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As illustrated in Fig. 4, the Pre-M specimens were exposed to UMF for 2 minutes as recommended by Hajforoush et al [39]. While the UMF was applied to Post-M samples during the test until collapse.…”

Section: Design and Tests Methodsmentioning

confidence: 99%

“…According to previous studies, mechanical properties of fresh concrete could be increased by direct applying of a magnetic field [33][34][35][36][37][38][39][40]. In an study by Soto-Bernal et al [33], it is reported that the compressive strength of cement pastes exposed to weak magnetic fields enhanced up to 13%.…”

Section: Introductionmentioning

confidence: 92%

“…Furthermore, the experimental investigation conducted by Rezaifar et al [38] clarified that the compression behavior of hardened RC columns under magnetic field is improved by 11%. Hajforoush et al [39], in an experimental campaign, studied the mechanical properties of concrete containing steel fibers under a homogeneous magnetic field treatment. However, their study has not investigated the microstructure properties of concrete specimens exposed to the magnetic field using microscopic images.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The effects of uniform magnetic field on the mechanical and microstructural properties of concrete incorporating steel fibers

et al. 2021

Self Cite

View full text Add to dashboard Cite

This study investigated the effects of applying a uniform magnetic field (UMF) of flux density 500 mili Tesla (mT) to fresh and hardened concrete specimens with steel fibers at volume ratios of 1 and 1.5% on mechanical and microstructural properties. To attain these objectives, compressive and splitting tensile strengths tests were carried out on the specimens with steel fiber-reinforced concrete (SFRC) at 28 days. Furthermore, the microstructure of SFRC, subjected to the UMF, was assessed via scanning electron microscopy (SEM) images. An electromagnetic instrument, capable of generating a density of 500 mT, was used to produce UMF. Finally, a model equation was proposed to predict the splitting tensile strength of SFRC subjected to the UMF as a function of its compressive strength. The application of UMF to SFRC specimens incorporating 1.5% steel fibers revealed an increase in both compressive and splitting tensile strengths up to about 18.2% and 9.5%, respectively. The SEM analysis indicated that the UMF enhanced the cement hydration process, which is responsible for the higher mechanical strength development of SFRC compared to the control specimen.

show abstract

Section: Design and Tests Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The effects of uniform magnetic field on the mechanical and microstructural properties of concrete incorporating steel fibers

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Since 2015, researchers have attempted to use a magnetic field to align the direction of steel fibers mixed in concrete and mortar [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ]. This method corresponds to the most active research attempt to artificially align the direction of steel fibers in concrete.…”

Section: Introductionmentioning

confidence: 99%

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

Kang¹,

Moon

Kim

2021

Materials

View full text Add to dashboard Cite

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.

show abstract

“…In the case of steel fibres, magnetic field orientation can be used. Such orientation has been explored in several studies [ 19 , 20 , 21 , 22 , 23 ]. These studies described the basic principles and theoretical application, but several aspects of the fibre orientation process are still being researched.…”

Section: Introductionmentioning

confidence: 99%

Simulations of the Behaviour of Steel Ferromagnetic Fibres Commonly Used in Concrete in a Magnetic Field

et al. 2021

View full text Add to dashboard Cite

The efficiency of fibre reinforcement in concrete can be drastically increased by orienting the fibres using a magnetic field. This orientation occurs immediately after pouring fresh concrete when the fibres can still move. The technique is most relevant for manufacturing prefabricated elements such as beams or columns. However, the parameters of such a field are not immediately apparent, as they depend on the specific fibre reaction to the magnetic field. In this study, a numerical model was created in ANSYS Maxwell to examine the mechanical torque acting on fibres placed in a magnetic field with varying parameters. The model consists of a single fibre placed between two Helmholtz coils. The simulations were verified with an experimental setup as well as theoretical relationships. Ten different fibre types, both straight and hook-ended, were examined. The developed model can be successfully used to study the behaviour of fibres in a magnetic field. The fibre size plays the most important role together with the magnetic saturation of the fibre material. Multiple fibres show significant interactions.

show abstract

Investigation of engineering properties of steel fiber reinforced concrete exposed to homogeneous magnetic field

Cited by 30 publications

References 36 publications

The effects of uniform magnetic field on the mechanical and microstructural properties of concrete incorporating steel fibers

The effects of uniform magnetic field on the mechanical and microstructural properties of concrete incorporating steel fibers

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

Simulations of the Behaviour of Steel Ferromagnetic Fibres Commonly Used in Concrete in a Magnetic Field

Contact Info

Product

Resources

About