CUED Publications database

Stress-path effects on the grading of an artificial material with crushable grains

Casini, F and Leu, J and Low, B and Wanninger, F and Zimmermann, A and Zwicker, P and Springman, SM and Viggiani, GMB (2013) Stress-path effects on the grading of an artificial material with crushable grains. In: UNSPECIFIED pp. 207-210..

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Granular materials forming natural slopes, embankments, foundations, pavement structures, and rail track structures are subjected to static and dynamic loads, which may cause particle breakage to occur. Results are presented of an experimental investigation into the mechanical response of an artificial granular material, consisting of crushed expanded clay pellets, commercially known under the brand name LECA (Light Expanded Clay Aggregate) to various stress path tests. The material was reconstituted, with a maximum particle size of 2 mm, to obtain grading curves with the same mean diameter d50, and different coefficients of uniformity, U (= 3.5, 7, 14, 28) or the same U and a different d50 (= 0.5, 1 mm). The constant volume friction angle and the minimum and maximum densities corresponding to each grading were determined before stress path testing in one dimensional and triaxial compression at different stress levels. Changes in the LECA grading after the stress path tests were described using two parameters defined respectively as the mean diameter and coefficient of uniformity of the final distribution over the value of the initial distributions, both of which were assumed to be consistent with self-similar grading with varying fractal dimension.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Uncontrolled Keywords: artificial material grain crushing grain size distribution breakage stress path testing
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 05 Oct 2017 01:42
Last Modified: 18 Aug 2020 12:35