To Study the Mechanical and Thermal Behaviour of Hollow Core Slab

Abstract

In this paper, thermal insulation is provided through the roof. Properties of the porous roof are examined thermally and mechanically. The development of slab with the hollow cylindrical shafts in such a manner that they entrap the air and act as an insulation material. The thickness of the slab will be greater than the conventional. This will, in turn, increase the quantity of concrete and cost also. But will reduce the operational cost of the building as thermal insulation once installed doesn’t require maintenance. However, the challenge is to develop this design without effecting the structural behavior and load-bearing capacity of slabs. In methodology, analysis of slab was done on the basis of mechanical properties and thermal properties. In mechanical properties, we studied about compressive strength, tensile strength and when exposed to fire. In thermal properties, average thermal variation in temperature of slab was studied, heat loss coefficient or U-value of slab and heat efficiency of slab under different climatic conditions. Various equations were studied and applied like total heat loss coefficient and heat efficiency. As a result, 6° drop in temperature was recorded in a hollow core slab. U-value of hollow core slab was 11% more efficient than the conventional slab. Also, heat loss efficiency was twice in case of hollow core slab. It was concluded that hollow core slab can be used effectively for insulation purpose in hot and humid regions.