Effect of Surface Shape and Content of Steel Fiber on Mechanical Properties of Concrete

Table 3

Geometry and mechanical characteristics of steel fibers.

	ST-F	HE-F	CO-F
Fiber shape	Straight	Hooked end	Corrugated
Mean length (lf), mm	32.34	32.19	32.27
Mean diameter (df), mm	1.036	0.993	1.215
Aspect ratio (lf/df)	31.21	32.41	26.56
Density (g/cm^3)	7.9	7.9	7.9
Elastic modulus (GPa)	200	200	200
Tensile strength (MPa)	500	380	500