The effect of magnetic field on the properties of concrete containing steel fiber and magnetite aggregate

Articles in Press

Document Type : Research Paper

Authors

1 Postdoctoral Researcher in Structural Eng., Faculty of Engineering, University of Guilan, Rasht, Iran

2 Professor in Structural Eng., Faculty of Engineering, University of Guilan, Rasht, Iran

3 Ph.D. Student in Structural Eng., Faculty of Engineering, University of Guilan, Rasht, Iran

10.22124/jcr.2025.28689.1674

Abstract

The aim of the present paper was to evaluate the effect of applying a magnetic field of 0.5 Tesla directly to fresh concrete specimens with a steel fiber volume fraction of 1% and magnetite aggregates (50% and 100% by volume of conventional coarse aggregate) on the mechanical and microstructural properties of the concrete. For this purpose, compressive and flexural strengths tests were carried out on the concrete specimens at an age of 28-day. In addition, microstructure of concrete exposed to magnetic field was assessed via scanning electron microscopy (SEM) images. Following this, the distribution of steel fibers in concrete subjected to magnetic field was recognized by X-ray images. The results showed that the applying magnetic field to concrete specimens with 50% magnetite aggregate increased their compressive and flexural strengths up to 10.7% and 17.7%, respectively. The SEM analysis demonstrated that the structure of C-S-H gel in concrete exposed to magnetic field becomes denser and less porous. Furthermore, the X-ray images confirmed the uniformity of steel fiber distribution in the direction of magnetic flux, applied to concrete specimens.

Keywords

Main Subjects

Concrete Research

Articles in Press, Accepted Manuscript
Available Online from 06 January 2025

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