AN EXPERIMENTAL STUDY ON FLEXURAL BEHAVIOUR OF R C C TWO WAY SLABS
Keywords:
Concrete, Recycled aggregate, Steel reinforcement, Modulus of elasticity, Crack width, Deflection, Strain.Abstract
Concrete is the most commonly used material in various types of constructions. The demand of aggregate and
cement used in concrete is increasing worldwide every year due to rapid industrialization and urban development. The
excessive utilization of aggregate for concrete production leads to excessive exploitation of natural aggregate and
environmental degradation from quarrying activities. This has resulted in renewed interest in Recycled Aggregate (RA)
as a viable source of concrete ingredient. Study carries casting and testing of two way slab specimens by using natural
coarse aggregate and 50% replacement with recycled aggregate. The concrete grade considered for study is M25. In the
experimental study the concrete mix has been designed as per the guidelines given in IS: 10262-2009 published by
Bureau of Indian Standards. In slab specimens, the steel reinforcement varies from 0.3%, 0.4%, 0.5% in both the cases
(natural and recycled) by using 6mm and 8mm diameter rebars. The size of two way slab is 600mm × 800mm × 90mm.
The value of modulus of elasticity (E) is evaluated from the load vs. deflection curve of slab specimens. The modulus of
elasticity of concrete is a very important parameter reflecting the ability of concrete to deform elastically. Deflections
and crack widths are the parameters that gives us warning that the structure is about to fail so that there will be time to
counter act. The aim of study is to verify the influence of steel reinforcement on the modulus of elasticity of reinforced
concrete members.
