STUDY ON THE BEHAVIOUR OF GLASS FIBRE REINFORCED CONCRETE

Abstract

It is a well known fact that the tensile strength of concrete is very less in comparison to its compressive strength. Addition of fibre improves the tensile strength of concrete and improves various other properties and is called Fibre Reinforced Concrete. Different types of fibres are available which are added in concrete such as Steel fibre, Carbon fibre, Aramid, asbestos, natural fibres etc. Among various types of fibres used in preparation of Fibre Reinforced concrete, Glass fibre comes under the category of metallic and inorganic type.In this thesis, experimental investigation was carried out to study the effect of glass fibre on concrete. About 30 cubes, 30 beans, 30 cylinders were casted and cured at varying fibre content of 0%, 0.5%, 1.0%, 1.5%, & 2.0%. Various Destructive test such as Compressive strength test, Flexural Strength test, Split cylinder test andnon destructive test such as Rebound hammer test and Ultrasonic pulse velocity test were carried out on the specimen with varying fibre content. Compressive strength, flexural strength, split tensile strength all were found to increase with increase in fibre content. Maximum strength was gained at a fibre content of 1.5%. Rebound hammer test and Ultrasonic pulse velocity test were conducted to check for the effect of fibre content on test results. Results obtained from rebound hammer were compared to actual cube compressive strength and was found to be in correlation with the destructive test. The concrete quality was assessed using Ultrasonic pulse velocity test. UPV readings showed that the concrete casted were mostly found in good quality.