Study on Flexural and Shear Behaviour of Hybrid Fibre Reinforced Self-Compacting Concrete Containing Silica Fume and M-Sand

Self-Compacting Concrete (SCC) is a high performance concrete that does not require any vibration for placing and compaction. It is able to flow under its own weight and achieves full compaction. Addition of fibres improves the residual load bearing capacity of concrete and this improvement is influenced by the type, content and orientation of the fibres. The use of fibres may extend the possible fields of application of self compacting concrete. Nowadays, the availability of natural river sand is limited due to high cost and scarcity. At present Msand is the most commonly used fine aggregate. In this thesis, the SCC is made with 25% replacement of cement with silica fume, polypropylene fibre (0%, 0.1%,0.2% to the total volume of concrete), steel fibre (0%, 0.75%, 1.5% to the total volume of concrete) and M-sand (manufactured sand) as fine aggregate. The main focus of this study is on investigating flexural and shear strength behaviour of this hybrid fibre reinforced self compacting concrete containing silica fume and M-sand. Keywords-Hybrid fibre, Steel fibre, Polypropylene fibre, Silica fume