Experimental Investigation on the Impact of Micro-Steel Fibers on the Flat Slabs' Punching Shear Resistance

This research examined the effects of micro-straight steel fiber percentage and column form on punching shear SFRC slabs. Fibers made micro with a diameter 0.2 mm length 13mm an aspect ratio equal to 65 were used. The content varied between 0.5%, 1%, 1.5% by volume. Four different types concrete mixes adopted tested. Experimental results showed that when fibers in increased, its compressive strength, flexural splitting tensile direct strength improved. investigation applied monotonic load eight cast slabs (two each conventional square circular sections equivalent area while other six concrete. dimensions slab (920 x 920 80 ) mm. Each specimen had essential, edge-based support round sections. It has been demonstrated endured relatively higher ultimate than segments dosage was 0.5% or 1.0%. Still, at 1.5%, segment approached heterogeneous behavior can be attributed random unequal distribution throughout material. There only fractures visible face slab. New emerged center as increased.