This paper investigates the stress-dilatancy relations of fibre-reinforced uncemented and cemented sand at a wide range of confining pressures. A detailed analysis of the effects of particle, bond and fibre damage on the stress-dilatancy behaviour of sand is presented. Results obtained from drained triaxial compression tests carried out on sand with various fibre and cement contents are compared and analysed. The effects of high confining pressure and fibre content on the stress-dilatancy behaviour of a cemented granular material reinforced with polypropylene fibres are discussed. The microstructure of pre-and post-loading triaxial test specimens is also analyzed using Scanning Electron Microscopy (SEM).