Flexural Behaviour Of Solo And Hybrid Fibre Concrete-A Comparative Study

Fibres are added to the concrete not only to increase tensile strength but also to control the crack and to change the behavior of cracked material by bridging across the cracks. Reinforcement of concrete with a single type of fibre may improve the desired properties to a limited level. On the other hand hybrid fibres with two or more that are rationally combined may produce better benefits. This paper is aimed at investigating the effect of hybrid fibres on the ductility of reinforced concrete beams. Three fibres namely hooked end steel fibre; Polyster recron fibre and coir fibre are used in this study with different aspect ratio. In addition comparisons are also made between solo fibre reinforced concrete, hybrid fibre reinforced concrete and controlled reinforced concrete. The parameters of investigation include compressive strength, flexural strength, ultimate load carrying capacity, stiffness, and ductility. A total of 7 beams and 42 cubes are casted to study the above parameters. The specimens incorporated 1% of fibre content. Compressive strength test result shows that the addition of fibres decrease the compressive strength. The experimental result shows that the ductility behavior of steel fibre reinforced beam and Hybrid fibre reinforced beam is high compared to controlled concrete.