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One of the many attributes of 3D printing is the ability to produce particles with independent control of morphology and material properties, parameters that are inexorably entwined in naturally occurring geomaterials. In this paper we describe the 3D printing of surrogate granular materials, show examples of the particles produced and present results showing their ability to capture real soil behaviour. Three approaches are demonstrated for the three dimensional generation of model grains. Thedoi:10.1680/jgeot.15.p.034 fatcat:227qefxxlbc7pojzkq7i27dmqy