Relating fragmentation, plastic work and critical state in crushable rock clasts

Wei Hu, Zhen Yu Yin, Gianvito Scaringi, Christophe Dano, Pierre Yves Hicher

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)

Abstract

Grain breakage during compression and shearing is one important mechanism responsible for irrecoverable changes of the mechanical properties of granular materials. Here we present results of triaxial tests on limestone fragments under some monotonic and cyclic stress paths and we investigate the relationships between the progression of grain breakage, the plastic work and the evolution of the critical state line. Using the plastic work concept, we propose a method for determining grain shape and grain breakage indices, and we show how grain breakage influences the critical stress state, and hence the mechanical behaviour. The validity of the relationships is then verified on different granular assemblies (granite fragments and quartz sands), although further tests remain necessary to validate them under more generic stress paths.

Original languageEnglish
Pages (from-to)326-336
Number of pages11
JournalEngineering Geology
Volume246
DOIs
Publication statusPublished - 28 Nov 2018

Keywords

  • critical state
  • fragmentation
  • particle crushing
  • plastic work
  • relative breakage

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geology

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