Strength and behaviour of Fly Ash based Steel Fibre Reinforced Concrete Composite

This experimental investigation is to study the effects of replacement of cement (by weight) with five percentage of fly ash and the effects of addition of steel fiber composite. A control mixture of proportions 1:1:49:1.79 with w/c of 0.45 was designed. Cement was replaced with five percentages (10%, 15%, 20%, 25% & 30%) of Class C fly ash. Four percentages of steel fibers (0.15%, 0.30%, 0.45% & 0.60%) having 20 mm length were used. This study reports the feasibility of use of steel fibres and their effect due to variation in fibre length, fibre content on structural properties such as cube compressive strength, cylinder compressive strength, split tensile strength, modulus of rupture and modulus of elasticity of this composite. Tests were conducted on beams with optimum fibre parameters, and the results compared with those of identical Reinforced Concrete beam.