Abstract: “The conventional ballasted rail track system incorporating steel tendon in prestressed concrete sleepers is predominantly used throughout the railway network in the UK. Despite its benefits, the associated demerits and the need to revolutionise rail transportation in the UK necessitated this investigation. The objective was to determine physical and mechanical characteristics of recycled aggregate concrete incorporating synthetic macro fibre and mineral admixtures to develop a low maintenance and corrosion-free prestressed concrete sleepers which is a high strength structural application. These materials were incorporated with varying percentage replacement (i.e. 0%, 25%, 50%, 75% & 100% respectively) of natural coarse aggregate by recycled aggregate, 54mm fortaferro synthetic macro fibre dosage (0.11% and 0.5%), 5% dosage of Microsilica and 0.4% High Range Superplasticiser by weight of cement. A total of 621 concrete samples (cubes, cylinders & prisms) were subjected to workability te”

Keywords: Ballasted rail track system; Synthetic macro fibre; Prestressed concrete sleepers; Compressive strength.