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Normalisation techniques for slowly-converging soils

Todisco, MC; Coop, MR; (2016) Normalisation techniques for slowly-converging soils. Procedia Engineering , 158 pp. 110-115. 10.1016/j.proeng.2016.08.414. Green open access

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Abstract

The existence of a unique normal compression, NCL, and critical state line, CSL, for clean sands and clays in the state plane, v-lnp’, is generally assumed. Recently, some soils of either complex grading or mixed mineralogy did not exhibit this convergent type of behaviour in the state plane at typical stress and strain levels. This investigation proposes different normalisation techniques for non-convergent soil mixtures consisting of fractally-graded single mineral sands, either quartz or calcium carbonate, with very large amounts of non-plastic fines. For the mixtures, the typical normalisation techniques do not work because a straight NCL, parallel to the CSL, could be defined only in the region of very low specific volumes and extremely high stress levels. Similarly, a normalisation based on an equivalent pressure p’e,CSL taken on a unique straight CSL could not be applied because of the existence of curved and multiple CSLs.

Type: Article
Title: Normalisation techniques for slowly-converging soils
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.2016.08.414
Publisher version: http://doi.org/10.1016/j.proeng.2016.08.414
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/). Peer-review under the responsibility of the organizing and scientific committees of CNRIG2016 doi: 10.1016/j.proeng.2016.08.414
Keywords: Science & Technology, Technology, Engineering, Geological, Engineering, transitional soils, state boundary surface, fractally-graded sands, TRANSITIONAL BEHAVIOR, SANDS, COMPRESSION, FINES, STATE
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/1528698
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