The A Study on Influence of GGBFS on Micro and Macro Polypropylene Fibre Reinforced Concrete

Polypropylene fibres are the new form of chemical fibres. Addition of polypropylene fibres decreases the unit weightof concrete and increases its strength. In this paper the behaviors of the normal concrete and concrete with different types of fibres such as macro-polypropylene and micro-polypropylene fibres have been studied. These fibres were added to the concrete at 0.5%, 1%, 2% and 4% with respect to the volume of concrete. Replacement of cement by a pozzolanic material, by-product from steel manufacturing industries known as Ground Granulated Blast Furnace Slag (GGBFS). The present study is to evaluate the mechanical properties of GGBFS as partial cement replacement in micro and macro polypropylene fibre reinforced concrete. Cement replaced with 40% GGBFS with 1% micro polypropylene fibre and 2% macro polypropylene fibre shows higher compressive strength. Bond strength of various mixes was determined by using pullout test