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In the UK Network Rail Environmental Sustainability Strategy 2020-2050,minimal waste and the sustainable use of materials are highlighted as corepriorities. The ambition is to reuse, repurpose or redeploy all resources. Inlow adhesion conditions, sand particles are used to enhance traction throughoutthe network. However, sand is in danger of becoming scarce as many applicationsdemand it. In this study, an alternative adhesion-enhancing particle systemmade of recycled crushed glass is examined in terms of density, size, shapedistribution, mineralogy, mechanical properties, and bulk behaviour to betterunderstand their characteristics in comparison with the typical Great Britishrail sand currently in use and reported in the literature. Their effects ontribological behaviour and surface damage are also investigated using theHigh-Pressure Torsion test in dry, wet, and leaf-contaminated conditions. Bothparticle characterisation and tribological testing show promising results.Recycled glass particles provide an acceptable level of traction with a similarlevel of rail damage as typical rail sand. It is suggested to performfull-scale laboratory and field tests to further confirm this material'ssuitability.

Characterisation and Tribological Testing of Recycled Crushed Glass as an Alternative Rail Sand