PUNCHING SHEAR BEHAVIOR OF REACTIVE POWDER CONCRETE SLABS WITH DIFFERENT SHAPE

Civil

Abstract

This research presents an experimental study of punching shear strength of reactive powder concrete (RPC) square and trapezoidal flat slabs. Reactive powder concrete is an ultra-high strength and high ductility composite materials in form of a super plasticized cement mixture with silica fume and steel fibers.
Six reduced scale reinforced concrete slab specimens divided into two groups (square and trapezoidal slabs) were casted and tested in this study.
Each group consists of three specimens which are identical in size and shape but contains different percentages of steel fibers (0, 0.5 and 1) % of total volume.
Results indicated that, punching shear strength increases by about (62.5 and 100) % in square slabs and is about (8.3 and 41.7) % in trapezoidal slabs containing 0.5% and 1% of steel fibers respectively.