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Expansive clays, collapsing sands, unbound pavement materials and unsaturated soil theory

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dc.contributor.authorCameron, D.A.
dc.contributor.conference6th International Conference on Unsaturated Soils; UNSAT 2014 (2 Jul 2014 - 4 Jul 2014 : Sydney, NSW)
dc.contributor.editorKhalili, N.
dc.contributor.editorRussell, A.
dc.contributor.editorKhoshghalb, A.
dc.date.issued2014
dc.description.abstractThe importance of soil suction on the behaviour of unsaturated geomaterials is widely recognized. Unsaturated soil theory relies heavily on Soil Water Characteristic Curves (SWCC), which can be established experimentally. The primary use of an SWCC is to convert moisture content, which is easily determined, to matric suction. Theoretical prediction of volume change of expansive soils remains difficult, however. Expansive clays cause damage to light structures. Movement can be estimated if suction- depth profiles are established and the soil profile is understood. Simple tests for soil reactivity have proven useful for calculating ground movements. The zone of influence of tree root systems on clay soils has been inferred from total suction-depth profiles and subsequently used to prepare guidelines for footing design for drying caused by trees. Suction can be an important bond, helping to hold collapsing sandy soils in a loose state. However, wetting reduces suction and other bonding agents, and so collapse follows, usually with the assistance of external loading. The suction of compacted unbound granular material is quite low relative to clays, yet can be important and has been shown to significantly influence properties important to pavement design. In this paper the author’s general experience with soil suction and SWCCs is related.
dc.identifier.citationUnsaturated Soils : research and applications - proceedings of the 6th International Conference on Unsaturated Soils, UNSAT 2014, 2014 / Khalili, N., Russell, A., Khoshghalb, A. (ed./s), vol.1, pp.63-69
dc.identifier.doi10.1201/b17034-9
dc.identifier.isbn9781138001503
dc.identifier.urihttps://hdl.handle.net/1959.8/158984
dc.language.isoen
dc.publisherCRC Press
dc.publisher.placeUK
dc.rightsCopyright 2014 Taylor & Francis
dc.source.urihttps://doi.org/10.1201/b17034-9
dc.subjectexternal loading
dc.subjectlight structures
dc.subjectsoil-water characteristic curve
dc.subjecttree root systems
dc.subjectunbound granular material
dc.subjectunbound pavement materials
dc.subjectunsaturated soil
dc.subjectzone of influences
dc.titleExpansive clays, collapsing sands, unbound pavement materials and unsaturated soil theory
dc.typeConference paper
pubs.publication-statusPublished
ror.mmsid9915910278501831

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