**5. Future Research**

Effect of micro-silica on the interfacial zones of fibers should be studied using scanning electron microscopy. Moreover, combined effect of MS and SF on different strength classes of concrete should also be investigated and compared. Effect of different MS contents on the freeze-thaw and corrosion resistance of SFRC can also be studied.

**Author Contributions:** Conceptualization, B.A. and B.H.; methodology, B.A. and B.H.; software, B.A. and B.H.; validation, R.K. and B.H.; formal analysis, B.A., R.K., B.H., R.A., A.R., A.M., R.M. and H.A.; investigation, B.A., B.H.; resources, B.A., R.K., B.H., R.A., A.R., A.M., R.M. and H.A.; data curation, B.A.; writing—original draft preparation, B.A. and B.H.; writing—review and editing, R.K., B.H., R.A., A.R., A.M., R.M., B.H., M.F.U.-H. and H.A.; visualization, R.K., B.H., R.A., A.R., A.M., R.M., M.F.U.-H. and H.A.; supervision, R.K.; project administration, B.A., and R.K.; funding acquisition, R.A. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by Deanship of scientific research, Prince Sattam bin Abdulaziz University, grant number No. 2020/01/16810.

**Acknowledgments:** This publication was supported by Deanship of scientific research, Prince Sattam bin Abdulaziz University under research project No. 2020/01/16810.

**Conflicts of Interest:** The authors declare no conflict of interest.
