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Materials 2018, 11(1), 170; https://doi.org/10.3390/ma11010170

Orientation of Steel Fibers in Magnetically Driven Concrete and Mortar

1
School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China
2
Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China
3
Faculty of Mechanical Engineering & Mechanics, Ningbo University, Ningbo 315211, China
4
Shaoxing Electric Power Bureau, Shaoxing 312000, China
*
Author to whom correspondence should be addressed.
Received: 13 December 2017 / Revised: 4 January 2018 / Accepted: 16 January 2018 / Published: 22 January 2018
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Abstract

The orientation of steel fibers in magnetically driven concrete and magnetically driven mortar was experimentally studied in this paper using a magnetic method. In the magnetically driven concrete, a steel slag was used to replace the coarse aggregate. In the magnetically driven mortar, steel slag and iron sand were used to replace the fine aggregate. A device was established to provide the magnetic force. The magnetic force was used to rotate the steel fibers. In addition, the magnetic force was also used to vibrate the concrete and mortar. The effect of magnetic force on the orientation of steel fibers was examined by comparing the direction of fibers before and after vibration. The effect of magnetically driven concrete and mortar on the orientation of steel fibers was also examined by comparing specimens to normal concrete and mortar. It is shown that the fibers could rotate about 90° in magnetically driven concrete. It is also shown that the number of fibers rotated in magnetically driven mortar was much more than in mortar vibrated using a shaking table. A splitting test was performed on concrete specimens to investigate the effect of fiber orientation. In addition, a flexural test was also performed on mortar test specimens. It is shown that the orientation of the steel fibers in magnetically driven concrete and mortar affects the strength of the concrete and mortar specimens. View Full-Text
Keywords: concrete; magnetic force; mortar; orientation; steel fiber concrete; magnetic force; mortar; orientation; steel fiber
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Xue, W.; Chen, J.; Xie, F.; Feng, B. Orientation of Steel Fibers in Magnetically Driven Concrete and Mortar. Materials 2018, 11, 170.

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