AN EXPERIMENTAL STUDY ON BEHAVIOUR OF CONCRETE BY PARTIAL REPLACEMENT OF CEMENT USING GGBS IN ADDITION WITH HYBRID FIBRE

Abstract

An experimental study on behaviour of concrete by partial replacement of cement using GGBS in addition
with hybrid fibres to enhance the engineering properties such as compressive strength, splitting tensile strength and
flexural strength of normal concrete (NC) and Hybrid Fibre Reinforced Concrete (HFRC) with partial replacement of
GGBS in cement have been obtained from standard tests and compared. Alkali resistive Glass fibre (GF) and
polypropylene fibre (PF) were utilized as chemically inorganic strength inhibitors. Glass fibres are acquired from
molten glass of a specific composition. The replacement of cement with Ground granulated blast furnace slag (GGBS)
in hybrid fibre reinforced concrete decreases ecological contamination and improves the mechanical properties of
concrete. In this study different percentages (0%, 0.2%, 0.4%, 0.6%, 0.8% and 1.00%) of glass and polypropylene
fibres collectively act as a hybrid fibre with different percentages of GGBS (0%, 10%, 20%, 30%, 40% and 50%) are
used to know their effect on the hybrid fibre reinforced concrete. Samples cast for testing are cubes, cylinders and
prisms. It is observed that at 1.4% (0.6% polypropylene and 0.8% glass fibres) addition of fibres and up to 20%
substitution of GGBS as the binder can improve the properties of concrete. Using of hybrid fibres and GGBS
improved all the three mechanical properties of concrete like compressive strength, split tensile strength and flexural
strength of concrete.