@article { author = {Hajforoush, M. and Kheyroddin, A. and Rezaifar, O. and Kioumarsi, M.}, title = {The effects of uniform magnetic field on the mechanical and microstructural properties of concrete incorporating steel fibers}, journal = {Scientia Iranica}, volume = {28}, number = {5}, pages = {2557-2567}, year = {2021}, publisher = {Sharif University of Technology}, issn = {1026-3098}, eissn = {2345-3605}, doi = {10.24200/sci.2021.56888.4963}, abstract = {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.}, keywords = {magnetic field,Steel fiber-reinforced concrete,compressive strength,Splitting tensile strength,SEM image}, url = {https://scientiairanica.sharif.edu/article_22350.html}, eprint = {https://scientiairanica.sharif.edu/article_22350_321a16c9bf2d03f650ecea91fe167f08.pdf} }