Study of High Strength Fibre Reinforced Concrete for M80 Grade by Using Different Types of Steel Fibre

The use of High Strength Concrete (HSC) is on explore. It is has been found that HSC is relatively brittle material. Fibres are added to improve its ductility. Experimental study is carried out to assess mechanical properties of high strength fibre reinforced concrete (HSFRC) of grade M80. In addition to normal materials, silica fume, fly Ash and three types of fibres viz. Hooked end steel, Flat steel fibre and Crimped steel fiber are used. The content of silica fume and fly ash is 5% and 20% respectively by weight of cement. Water to cementitious material ratio was 0.25. Mixes are produced by varying types of fibres and for each type of fibre its volume fraction is varied from 0.5% to 4.0 % with an increment of 0.5% by weight of cementitious materials. 150 specimens of cubes (150×150×150mm), are tested to study the effect type and of fibres on compressive strength and workability of HSFRC. The results indicated significant improvement in mechanical properties of HSFRC.