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The micromechanical behaviour of a biogenic carbonate sand

Nardelli, V; Coop, MR; (2016) The micromechanical behaviour of a biogenic carbonate sand. In: Gottardi, G and Tonni, L, (eds.) (Proceedings) 6th Italian Conference of Researchers in Geotechnical Engineering (CNRIG) - Geotechnical Engineering in Multidisciplinary Research - From Microscale to Regional Scale. (pp. pp. 39-44). Elsevier Science BV Green open access

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Abstract

An experimental investigation of the micromechanical behaviour of a biogenic carbonate sand from the Philippines was conducted. Mechanical parameters of sands at the micro-scale are required in order to simulate the particle interactions in numerical analyses carried out using the Discrete Element Method (DEM). The tests were performed on particles obtained from the sedimentation of coral fragments and they were carried out by means of a custom-made inter-particle loading apparatus that enabled the investigation of both the normal and tangential loading behaviour at the particle contacts. The normal loading tests showed a reversible behaviour after the first loading, while the tangential loading behaviour of this sand appears to be dependent on the vertical confinement and mainly reversible for small displacement cycles. Also, the inter-particle friction coefficients at larger displacements are substantially higher than those calculated for other sands using the same experimental procedures.

Type: Proceedings paper
Title: The micromechanical behaviour of a biogenic carbonate sand
Event: 6th Italian Conference of Researchers in Geotechnical Engineering (CNRIG) - Geotechnical Engineering in Multidisciplinary Research - From Microscale to Regional Scale
Location: Bologna, ITALY
Dates: 22 September 2016 - 23 September 2016
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.proeng.2016.08.402
Language: English
Additional information: © 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Keywords: Science & Technology, Technology, Engineering, Geological, Engineering, Carbonate Sand, Micromechanics, Contact Behaviour, Friction, Stiffness, Interparticle Friction, Particle Characteristics
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1528772
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