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Non-invasive characterisation of particle morphology of natural sands

This paper presents a novel quantitative description of the morphology of sand particles in 3D. The distribution of particle sizes and the grain shapes are fundamental characteristics of a soil. Image processing algorithms were developed and validated to extract measurements from high resolution micro-CT images of intact and reconstituted sand specimens during deformation. The results highlight the limitations of the traditional techniques such as sieving or laser diffraction to measure the operational grading of some intact sands, due to their invasive nature. This paper contributes new concepts for data interpretation and suggests a change for common practices.