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Title |
Evaluation of Required Electromagnetic Force for Steel Fiber Alignment Based on Rheological Properties
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Authors |
문도영(Do Young Moon) ; 이강진(Kang Jin Lee) |
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DOI |
https://doi.org/10.4334/JKCI.2026.38.1.103 |
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Keywords |
강섬유; 레올로지 특성; 전자기장; 정렬 steel fiber; rheological property; magnetic field; alignment |
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Abstract |
This study investigates the rheological behavior of steel fiber reinforced mortar (SFRM) under electromagnetic fields (EMF) and evaluates the magnetic force required for fiber alignment. Rheological tests were conducted on normal mortar and SFRM with and without EMF application. Normal mortar exhibited linear Bingham behavior regardless of EMF, whereas SFRM showed pronounced non-linear stick?flow behavior under EMF. This behavior is attributed to magnetic-field-induced fiber orientation, which obstructs flow and increases viscous resistance. An effective viscosity was defined based on the median value of the viscosity distribution under EMF, and the required magnetic flux density for fiber alignment was evaluated accordingly. The results indicate that the magnetic force required for fiber alignment increases by approximately 1.6?1.9 times compared to the reference state without a magnetic field. These findings indicate that changes in rheological behavior should be carefully considered in the design of steel fiber alignment control techniques using magnetic fields.
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