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Fibre-reinforcing is an efficient method to improve the mechanical properties of a wide range of materials including soils. A drawback of currently used fibres, given by methods of production, is their uniform cross-section, planar shape and a smooth surface in most cases having an adverse effect on the pull-out capacity of fibres. The proposed paper presents an initial experience with the fabrication of fibres and testing of cohesionless soils improved in this way. The commercially available 3D printer was used a...