Experimental investigation on glass fibre concrete with partial replacement of cement by fly ash

Abstract

Fly ash has been used as a mineral admixture in cement and concrete. Using it provides several advantages, such as improved strength and workability properties, and environmental benefits related to the disposal of waste materials and to reduced carbon dioxide emissions. Alkali Resistant glass fibres are used as additional reinforcement of concrete. Glass fibres acted as good crack arrester and increases split and flexural strength not increase in compressive strength. M30 grade of concrete is used for this study. The main objective of this work is to study the suitability of the fly ash as a mineral admixture for cement replacement and additional reinforcement of glass fibres in concrete. Fly ash as partial replacement of cement and glass fibres are used as additional reinforcement, which satisfies the various structural properties of concrete like compressive, split and flexural strength. From the entire study it is concluded that mix M3 (10%FA+0.15%GF) is the best combination among all mixes, which gives maximum, tensile strength, (10% FA + 0.15% GF) shows better flexure strength and mix M3 (5% FA + 0.10% GF) is shows good compressive strength at 28 days over normal concrete. There is no increased compressive strength at 7 days and split tensile strength in fly ash mixes.