EPJ Web Conf.
Volume 140, 2017Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media
|Number of page(s)||4|
|Published online||30 June 2017|
Sand – rubber mixtures submitted to isotropic loading: a minimal model
1 LUNAM Université, IFSTTAR, MAST, GPEM, F-44340 Bouguenais, France
2 GeM (Institut de recherche en génie civil et mécanique), CNRS UMR 6183, École Centrale de Nantes, F-44321 Nantes, France
3 Department of Civil Engineering, University of Bristol. Bristol, BS8 1TR, UK
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Published online: 30 June 2017
The volume of scrap tyres, an undesired urban waste, is increasing rapidly in every country. Mixing sand and rubber particles as a lightweight backfill is one of the possible alternatives to avoid stockpiling them in the environment. This paper presents a minimal model aiming to capture the evolution of the void ratio of sand-rubber mixtures undergoing an isotropic compression loading. It is based on the idea that, submitted to a pressure, the rubber chips deform and partially fill the porous space of the system, leading to a decrease of the void ratio with increasing pressure. Our simple approach is capable of reproducing experimental data for two types of sand (a rounded one and a sub-angular one) and up to mixtures composed of 50% of rubber.
© The Authors, published by EDP Sciences, 2017
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