UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

The effects of weathering on the physical and mechanical properties of igneous and metamorphic saprolites

Rocchi, I; Coop, MR; Maccarini, M; (2017) The effects of weathering on the physical and mechanical properties of igneous and metamorphic saprolites. Engineering Geology , 231 pp. 56-67. 10.1016/j.enggeo.2017.10.003. Green open access

[img]
Preview
Text
manuscript-final submission.pdf - Accepted version

Download (1MB) | Preview

Abstract

The present paper presents three extensive datasets of laboratory testing on weathered geomaterials, which are emblematic of soil types widely found worldwide. The overall dataset includes soils originating from igneous and metamorphic rocks, either coarse or fine grained and having either felsic or mafic minerals. In particular, the data are interpreted to highlight the effects that weathering has on the physical and mechanical properties of these natural geomaterials comparing them with published data with the aim to provide a general framework of interpretation that takes into account this geological process and links soil mechanics to engineering geology. Generally, weathering induces a reduction in the grain size, both due to physical actions (e.g. opening of grain contacts) and to the chemical decomposition of minerals resulting in the formation of clay minerals. As weathering proceeds and the soil becomes finer, the in situ specific volume and the location of the normal compression and critical state lines move upwards in the volumetric plane. On the other hand, the clay minerals cause its angle of shearing resistance to reduce. When analysing the behaviour of the intact soil, in all cases positive effects of structure, albeit small compared to some sedimentary soils, were observed and these reduced as a consequence of weathering.

Type: Article
Title: The effects of weathering on the physical and mechanical properties of igneous and metamorphic saprolites
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.enggeo.2017.10.003
Publisher version: https://doi.org/10.1016/j.enggeo.2017.10.003
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Residual soils; Saprolite; Structure; Weathering
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10024557
Downloads since deposit
97Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item