Experimental Evaluation of Strength Properties of Steel Fibre Reinforced Concrete

As concrete is weak in tension, addition of extraneous materials has become an obvious choice to enhance the tensile strength properties of concrete. Steel fibres are added to enhance the strength properties of control mix. Change in either aspect ratio or geometric shape of the fibre has significant influence on the strength properties of fibre reinforced concrete. An experimental investigation was conducted to understand the influence of hooked end steel fibres on compressive, split and flexural strength properties of M30 grade concrete mix with fibre dosages of 0.50%, 1.00%, 1.25% and 1.50% of volume of concrete for the ages of 7, 28 and 90 days. It was found that though steel fibres did not influence the compressive strength to a great extent, it did influence split and flexural strength properties substantially. Increase in fibre dosage increased the compressive strength. Increase to an extent of 30% was found in split and flexural strength properties. Additionally, linear regression analysis was carried out among strength properties and R- squared value was found to be between 0.81 and 0.98.