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The micro-mechanical behaviour of artificially cemented sand particles under compression and shear

Wang, W; Nardelli, V; Coop, MR; (2017) The micro-mechanical behaviour of artificially cemented sand particles under compression and shear. Geotechnique Letters , 7 (3) pp. 1-7. 10.1680/jgele.16.00166. Green open access

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Abstract

The mechanical behaviour of cemented sands at macro-scale has been widely studied in the past, while there is still a lack of laboratory test data for the micro-mechanical response. Therefore, a series of uniaxial compression and tangential shear tests on artificially cemented sand particles have been conducted using a microscope to observe their behaviour. First, the consistency of cemented particles with different cementing agents is discussed. Three breakage modes are proposed according to the images taken using a microscope camera. A new parameter named ‘local roundness at contact’ is introduced to emphasise the effect of contact morphology on sample strength. Moreover, the effect of bond thickness on the mechanical response of cemented particles has been investigated. Finally, the shear strength parameters of artificially cemented sand samples have been determined for two different sample diameters.

Type: Article
Title: The micro-mechanical behaviour of artificially cemented sand particles under compression and shear
Open access status: An open access version is available from UCL Discovery
DOI: 10.1680/jgele.16.00166
Publisher version: https://doi.org/10.1680/jgele.16.00166
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Laboratory tests, particle-scale behaviour, sands
UCL classification: UCL
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/1556456
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