Comparative Study of Voided Flat Plate Slab and Solid Flat Plate Slab

The slab is very important structure member in building and slab is one of the largest member consuming concrete. When the load acting on the slab is large or clear span between columns is more, the slab thickness is on increasing. It leads to consume more material such as concrete and steel, due to that self-weight of slab is increase. To avoid these disadvantages various studies carried out and researchers suggest voided flat plate slab system to reduce the self-weight of the slab.A voided flat slab system is known as one of the effective slab system, which can reduce self-weight of slab. A voided flat slab has hollow void former made from recycled plastic placed within slab in order to reduce self-weight of slab. The voided flat slab and solid slab are consider with interior span ranging from 6m x 6m to 14m x 14m having thickness from 280mm to 600mm having spherical balls into the slabs from 180mm to 450mm. Self-weight reduction, stiffness reduction factor and solid area for punching shear is derived for different cases of voided flat plate slab.