CUED Publications database

Grading evolution of an artificial granular material from medium to high stress under one-dimensional compression

Casini, F and Guida, G and Bartoli, M and Viggiani, GMB (2017) Grading evolution of an artificial granular material from medium to high stress under one-dimensional compression. Rivista Italiana di Geotecnica, 51. pp. 69-80. ISSN 0557-1405

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Abstract

This contribution presents the results of an experimental investigation of the mechanical behaviour of granular materials with crushable grains under one-dimensional compression at medium to high stress. The material used for the experimental work is a Light Expanded Clay Aggregate (LECA) whose grains break at relatively low stress. Reconstituted samples were prepared with different initial grain size distributions and their evolution observed under one-dimensional compression. The grain size distributions before and after testing were used to calibrate a bimodal model obtained from the superposition of two Weibull functions. The observed evolution of the micro and macro diameters on loading are linked to the characteristics of the one-dimensional compressibility curve obtained under displacement controlled conditions, such as its shape and two characteristic stress values, namely the pre-consolidation stress and the stress corresponding to the point of inflection.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 20 Feb 2018 01:17
Last Modified: 18 Aug 2020 12:43
DOI: doi:10.19199/2017.4.0557-1405.69