Abstract

The research work lays emphasis on the use of glass fibre of two different sizes of 5m and 8mm, to improve the mechanical strength properties of the concrete. Over the decades, there has been a significant increase in the use of fibres in concrete for improving its properties such as the compressive strength, split tensile strength and flexural strength. Among many different types of fibres available today, glass fibre is a recent introduction in the field of concrete technology which has shown considerable improvement in mechanical properties when compared to plainconcrete. Various experimental studies were done to discover the fresh and hardened concrete properties of glass fibre composite concrete using different glass fibre length (10, 12, 16 and 20 mm). Glass fibre length shorter than 10 mm has not been exhaustively investigated to establish its impact on the characteristic strengths of concrete. Plain concrete with addition of glass fibre was used as the control specimen. It was observed during the research work that the workability of the concrete reduced with increase in glass fibre content at varying percentage (0, 0.2, 0.3, 0.4 and 0.5%). The mechanical properties such as the compressive, split tensile and flexural strengths increased with the addition of glass fibre and the optimum glass fibre content of 0.4% has the highest strength at 7, 14 and 28 days curing ages and that glass fibre composite concrete with 5 mm length improves the concrete properties than 8mm glass fibre length