Punching Shear Performance of Steel Fiber Reinforced Geopolymer Concrete Slabs

Abstract

This article provides performance of two way slabs under punching shear. The two way slabs are cast with dimensions of 600x600x75mm and to cast the slabs geopolymer concrete along with micro (13mm length (small fiber)) and macro steel fibers (50mm length (big fibers)) were used. Total four mixes were taken to the present study and for each mix three slabs were cast. The first mix without fibers, second mix with small fiber, the third mix with big fiber and fourth mix with small and big fibers are taken to the present study. All the slabs were tested under single point concentrated load and load is placed at the center of the slab. From the experimental investigation it is obvious that, the slab with combination of small and big fibers showed superior performance among all and it showed 157.1% higher strength carrying capacity than the slab without fibers.