Structural Behaviour of Ferrocement Slabs Strengthened By Carbon Fibre

Abstract

The slabs are one of the most important members, in our civil structures. The slabs are mainly subjected to deflection at the time of loading. The deflection may be minimized by increasing the reinforcement area within the slab. Nowadays thin slab with long spans is mostly adopted. This can be achieved only by using Ferro cement slabs. The slabs of this kind will be of less thickness. Due to its less thickness, the rate of deflection & corrosion will be high. To avoid this, the CFRP is wounded over the wire mesh followed by the casting. The aim of our project is to increase the strength of Ferro-cement concrete with respect to the addition of CFRP along the longitudinal direction of wire mesh. The durability studies are conducted on each specimen to know the resistance capacity of the CFRP towards external loading in the acid environment. Totally 20 slabs with length 700mm, width 300mm, depth (20mm, 25mm, and 30mm) are cast. Among the 20 slabs, 12 are for deflection parameter test for normal curing and acid curing without CFRP, remaining 8 slabs casted with CFRP of different windings. Then compared test result of above 12 slabs which will attain more strength. From the compared test result found that 25mm thickness attains more strength.25mm thickness slab casted and tested with one and three times wounding of CFRP wire mesh and cured 4 slabs in water and 4 slabs in acid. The Ferro-cement slabs of 25mm thickness with CFRP are found to have good economical and resistance towards external loading.