Flexural behaviour of reinforced Concrete t beams by using of Polypropylene fibres

Abstract

Concrete is said to be the second most consumed material, next to water. In developing countries like India, there is a growing demand for civil infrastructural facilities like roads, bridges and multistory buildings. The property of concrete predominantly determines the strength and durability properties of the structure as a whole. Since concrete is weak in resisting tensile stresses and in order to prevent formation of number of micro cracks, fibres are used. The fibres provide local tensile strength and improve the cracking behavior of concrete. There are different types of fibres available in the market based on natural fibres and synthetic fibres. Steel fibres and polypropylene fibres have found an extensive place in practical applications. Conventional reinforced concrete buildings consist of load-bearing brick masonry walls and reinforced concrete floors. In framed reinforced concrete structure, the beams together with the slab act together as T-beam. The width of flange of the T-beam is determined based on formulas stipulated by different codes of practice. In order to determine the actual behavior of T-beams, experimental studies are required. In this thesis, experimental and numerical studies are carried out to determine the mechanical properties of concrete consisting of different types of fibres. Two different types of fibres such as steel fibres and polypropylene fibres are considered in this study. Different percentages of fibres are considered. The percentages considered ranges of 0.5-2.0%. For casting of specimens, M35 grade concrete is considered newline