The Influence of Aspect Ratio of Steel Fibers on The Mechanical Properties of Concrete

Ali Ghiami Bajgirani¹ Soroush Moghadam² Shahriar Tavousi Tafreshi³ Amirhossein Arbab⁴ Hossein Razeghi⁵

1) Assistant professor, Department of civil engineering, The Institute of Higher Education of Eqbal Lahoori, Mashhad, Iran
2) Lecturer, Department of civil engineering, The Institute of Higher Education of Eqbal Lahoori, Mashhad, Iran
3) Assistant professor, Department of civil engineering, Azad University Central Tehran Branch, Iran
4) B.S. Educated of civil engineering, The Institute of Higher Education of Eqbal Lahoori, Mashhad, Iran
5) M.Sc.Eng. student of structure, The Institute of Higher Education of Eqbal Lahoori, Mashhad, Iran

Publication : 3rd International Conference on Research in Civil Engineering, Architecture and Urban Management and Sustainable Environment(3cauem.com)
Abstract :
Structural behavior of steel fiber reinforced concrete members depends on different parameters such as aspect ratio of fiber, the geometrical shape of fiber and placement of fiber in concrete. This article deals with the effect of aspect ratio of steel fibers on resistance characteristics in fiber reinforced concrete such as concrete workability, compressive strength, tensile strength and resistance against impact by considering that steel fibers length were 3.5, 6.5 and 8 cm at 1% weight of cement. Results indicate that the uses of steel fibers don t have a specific effect on compressive strength of concrete but it has a significant increase in its tensile strength and toughness. Also by increasing the aspect ratio of fiber slump will be decreased. Steel fibers will improve impact resistance, and reduces crack expansion.
Keywords : fiber reinforced concrete steel fibers toughness aspect ratio