Slaking and deformation behaviour

M. Kikumoto, A. D. Putra, T. Fukuda

Abstract

Slaking is a mechanical–hydraulic process in which geomaterials disintegrate or crumble when subjected to wetting and drying cycles; mudstone is particularly susceptible to this process. This paper explores the slaking behaviour of geomaterials derived from several kinds of mudstone and the mechanical consequences using a comprehensive set of experimental data obtained through accelerated slaking tests and newly developed one-dimensional compression slaking tests. These data confirm that slaking in crushed mudstone is accompanied by a variation in the particle size distribution during wetting and drying cycles, and a variation in grading results in an irreversible change in mechanical characteristics, such as the reference packing density. Significant compression is also found to occur without any change in effective confining stress. The results of X-ray fluorescence analysis, X-ray diffraction analysis and scanning electron microscopy are also used to elucidate the effects of mineralogy and particle texture on the slaking characteristics of crushed mudstone. Finally, it is also mentioned that constitutive modelling can take slaking into consideration by describing the evolution of an appropriate grading index due to slaking, and then linking this to reference packing density.

Original languageEnglish
Pages (from-to)771-785
Number of pages15
JournalGeotechnique
Volume66
Issue number9
DOIs
StatePublished - 2016 Sep 1

Fingerprint

slaking
mudstone
wetting
compression
X-ray fluorescence
mineralogy
texture
scanning electron microscopy
X-ray diffraction
particle size
hydraulics
modeling

Keywords

  • Compressibility
  • Laboratory tests
  • Microscopy
  • Mineralogy
  • Particle crushing/crushability
  • Soft rocks

ASJC Scopus subject areas

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

Cite this

Kikumoto, M., Putra, A. D., & Fukuda, T. (2016). Slaking and deformation behaviour. Geotechnique, 66(9), 771-785. DOI: 10.1680/jgeot.15.P.285

Slaking and deformation behaviour. / Kikumoto, M.; Putra, A. D.; Fukuda, T.

In: Geotechnique, Vol. 66, No. 9, 01.09.2016, p. 771-785.

Research output: Contribution to journalArticle

Kikumoto, M, Putra, AD & Fukuda, T 2016, 'Slaking and deformation behaviour' Geotechnique, vol 66, no. 9, pp. 771-785. DOI: 10.1680/jgeot.15.P.285
Kikumoto M, Putra AD, Fukuda T. Slaking and deformation behaviour. Geotechnique. 2016 Sep 1;66(9):771-785. Available from, DOI: 10.1680/jgeot.15.P.285

Kikumoto, M.; Putra, A. D.; Fukuda, T. / Slaking and deformation behaviour.

In: Geotechnique, Vol. 66, No. 9, 01.09.2016, p. 771-785.

Research output: Contribution to journalArticle

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