A practical approach to grain shape quantification |
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| Authors: | Melissa R Cox Muniram Budhu |
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| Institution: | 1. Dipartimento di Scienze dell''Ambiente e del Territorio e di Scienze della Terra, Università degli Studi Milano-Bicocca, Piazza della Scienza 4, 20126 Milano, Italy;2. Laboratorio de Petrología Aplicada, Departamento de Ciencias de la Tierra y del Medio Ambiente, Campus Sant Vicent del Raspeig, AP 99, 03080 Alicante, Spain;1. Department of Architecture and Civil Engineering, City University of Hong Kong, Kowloon, Hong Kong;2. Department of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan, China;1. Graduate Student, School of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Republic of Korea;2. Research Fellow, Korea Institute of Civil Engineering and Building Technology, Goyang 10223, Republic of Korea;3. Professor, School of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Republic of Korea;4. Associate Professor, School of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Republic of Korea;1. Universitat Politécnica de Catalunya (UPC), Department of Civil and Environmental Engineering, Barcelona, Spain;2. Université Grenoble Alpes, CNRS, Grenoble INP, Laboratoire 3SR, Grenoble, France |
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| Abstract: | Grain shape is a key factor affecting the mechanical properties of granular materials. However, grain shape quantification techniques to distinguish one granular material from another have not reached a stage of development for inclusion in modeling the behavior of granular materials. Part of the problem is the equipment of choice for grain shape measurement is the scanning electron microscopes. This is a relatively expensive and complex device. In this paper, we investigate a practical approach using light microscopy to quantify grain shape and to identify the key shape parameters that can distinguish grains. A light microscope was found to produce grain images with sufficient quality for the purpose of observing the grain shape profile. Several grain shape parameters were determined for eight different sands. We found Circularity, Roundness, Compactness, Sphericity, Aspect Ratio and ModRatio to be the key shape parameters that differentiate these sand grains. |
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