Evolution of particle damage of sand during axial compression via arrested tests

Eduardo Suescun-Florez, Magued Iskander, Stephan Bless

Research output: Contribution to journalArticle

Abstract

A series of axial loading and unloading compression tests was conducted on siliceous and calcareous sand, using a modified oedometer apparatus. Samples were prepared using aspect ratios of 6:1 and 1:1 (diameter:height) and loaded at uniform axial strain rates of 0.01 and 10%/s. Compression was arrested at various strains up to 30%, after which the size distribution of the sand particles was determined using a dynamic particle size analyzer capable of identifying particle shapes and sizes in the 10–3000 µm range. Samples responded slightly stiffer and experienced more crushing in the 1:1 aspect ratio tests. For silica sand, significant reduction in grain size was observed beyond 10% strain, with modest rate dependency observed. Faster breakage and greater rate sensitivity were seen in the softer coral sand, where particle breakage was observed to start at 5% strain. Strain-hardening behavior and hysteresis were observed in the stress–strain behavior and correlated with the size reduction observed in the arrested tests. In addition, it was noticed that smaller particles break more than larger particles. Both sands exhibited fractal particle evolution, i.e., when particles fracture, daughter particles preserve a similar sphericity to that of the parent material.

Original languageEnglish (US)
Pages (from-to)95-112
Number of pages18
JournalActa Geotechnica
Volume15
Issue number1
DOIs
StatePublished - Jan 1 2020

Fingerprint

Axial compression
Sand
compression
damage
sand
Aspect ratio
Silica sand
Crushing
breakage
Unloading
Strain hardening
Fractals
Hysteresis
Strain rate
Compaction
Particle size
soft coral
particle
test
unloading

Keywords

  • 1-D compression
  • Arrested tests
  • Comminution
  • Coral
  • Crushing
  • Siliceous
  • Size analysis
  • Strain controlled
  • Strain rate
  • Uniaxial

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Earth and Planetary Sciences (miscellaneous)

Cite this

Evolution of particle damage of sand during axial compression via arrested tests. / Suescun-Florez, Eduardo; Iskander, Magued; Bless, Stephan.

In: Acta Geotechnica, Vol. 15, No. 1, 01.01.2020, p. 95-112.

Research output: Contribution to journalArticle

Suescun-Florez, Eduardo ; Iskander, Magued ; Bless, Stephan. / Evolution of particle damage of sand during axial compression via arrested tests. In: Acta Geotechnica. 2020 ; Vol. 15, No. 1. pp. 95-112.
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