DefinePK

Abstract

Fibre Reinforced Polymers (FRP’s) are made known into a vast field of civil engineering functions. FRP is defined as a material which is composite made of polymer matrix reinforced with fibres. Their ability involves strengthening and rehabilitation of structures. The use of FRP as an external confinement on cylindrical columns and on different wrapping patterns helps us to determine the structural behaviour and variation in confinement strength of structures. There are so many existing researches in artificial fibres for confinement of structures and this paper concentrates on wrapping of structures with Natural FRPs because of its superior endurance and environmental friendly directories. In this paper, 39 cylindrical specimens of diameter 150mm and height 300mm are cast with m40 grade of concrete in which 9 specimens are unwrapped and remaining 30 specimens are wrapped with FRPs. The wrapping pattern includes different types such as one layer full wrap, two layer full wrap, centre wrap, partial wrap and two layer wrap. Axial compressive load is applied on all specimens and their strength is compared to find an effective one. Two types of Natural fibres such as Flax and Hemp are used for confinement in which 15 specimens are wrapped with flax and remaining 15 specimens are wrapped with hemp. The percentage gain of confinement strength of wrapped specimens are compared with different patterns of wrapping and among with different fibres and also with unwrapped specimens.