CUED Publications database

Breakage of an artificial crushable material under loading

Casini, F and Viggiani, GMB and Springman, SM (2013) Breakage of an artificial crushable material under loading. Granular Matter, 15. pp. 661-673. ISSN 1434-5021

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The mechanical behaviour of granular materials depends on their grading. Crushing of particles under compression or shear modifies the grain size distribution, with a tendency for the percentage of fine material to increase. It follows that the frictional properties of the material and the critical states are modified as a consequence of the changes in grain size distribution and the available range of packing densities. This paper illustrates an extended experimental investigation of the evolution of the grading of an artificial granular material, consisting of crushed expanded clay pellets under different loading conditions. The changes of grading of the material after isotropic, one-dimensional and constant mean effective stress triaxial compression were described using a single parameter based on the ratio of the areas under the current and an ultimate cumulative particle size distribution, which were both assumed to be consistent with self similar grading with varying fractal dimension. Relative breakage was related to the total work input for unit of volume. For poorly graded samples, the observed maximum rate of breakage is practically independent of initial uniformity. Further experiments at higher confining stress are required to investigate the mechanics of breakage of better graded samples. © 2013 Springer-Verlag Berlin Heidelberg.

Item Type: Article
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 02 Oct 2017 20:25
Last Modified: 29 Oct 2020 03:41
DOI: 10.1007/s10035-013-0432-x