On the intrinsic behaviour of decomposed volcanic rocks

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)1311–1322
Journal / PublicationBulletin of Engineering Geology and the Environment
Issue number3
Online published11 Nov 2019
Publication statusPublished - Apr 2020


The intrinsic behaviour of soils is very essential and the mechanical behaviour of reconstituted soils depends mainly on its intrinsic properties. The separate role played by particle shape, particle mineralogy and grading on the mechanical behaviour of soils resulting from weathered igneous rocks have not been extensively studied. The effects of particle shape, particle mineralogy and grading on the mechanics of decomposed volcanics have been systematically investigated through one-dimensional compression and triaxial tests. This was achieved by using samples of different weathering degrees. The results indicate that the influence of particle mineralogy on the one-dimensional compression behaviour is relatively small compared to grading. There is effect of grading on the shearing behaviour, and it is less pronounced than in compression. There is slight effect of grading at a small strain level. Generally, grading has a notable influence on the mechanical behaviour of volcanic saprolites, and it is more important than particle mineralogy for volcanic saprolites.

Research Area(s)

  • Grading, Particle mineralogy, Particle shape, Weathering, Volcanic rocks, MINERAL-COMPOSITION, COMPRESSION, SAND

Bibliographic Note

Full text of this publication does not contain sufficient affiliation information. The Research Unit(s) information for this record is based on the then academic department affiliation of the author(s).