Flexural behaviour of fibre reinforced concrete beams with different mix ratio of fibres

Abstract

newlineThe performance of conventional concrete is enriched by the addition of fibres in concrete The brittleness in concrete is reduced and the acceptable ductility of concrete is ensured by the addition of fibres in concrete In this paper the strength of concrete cubes cylinders and beams cast using M25 grade concrete and reinforced with steel and polypropylene fibres are presented Also hybrid fibres with crimped steel and polypropylene were used in concrete matrix to study its improvements in strength properties of steel polypropylene and hybrid steel crimped polypropylene and fibres of various proportion ie 025 05 075 1 and 05 025 of steel and 025 polypropylene 075 05 of steel and 025 polypropylene 025 of steel and 05 polypropylene and 1 of various combinations of hybrid fibres for 714 and 28 days respectively The synthetic fibres are used in concrete matrix and it is to improve post cracking response of the concrete to improve energy absorption capacity ductility and to provide crack resistance and crack control This type of concrete is introduced and it is brought in as a solution to develop concrete with enhanced flexural and tensile strength In this paper it has been analyzed and has been presented by the researcher a comparison between the conventional concrete to fibre reinforced concrete which is also suitable to provide a crack free structure Additionally it was studied that hybridization of several types of fibre proved more effectiveness in the concrete By the utilization of two or more types of fibre is commonly known as hybridization of fibres