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Article: Experimental study of soil microfabrics induced by anisotropic stresses of confined swelling and shrinking

TitleExperimental study of soil microfabrics induced by anisotropic stresses of confined swelling and shrinking
Authors
Issue Date1986
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/geoderma
Citation
Geoderma, 1986, v. 37 n. 2, p. 91-112 How to Cite?
AbstractThis experimental study examines the micromorphological changes resulting from confined swelling and shrinking of aggregated samples. Two factors, namely bulk density (two levels) and sample composition (five levels) were considered. Thin sections were cut and the microfabrics studied in detail both qualitatively and quantitatively. A broad range of significant and systematic microfabric changes were observed. With an increase in the activity and content of the clay fraction, the void volume (especially those >30 μm) decreased drastically whereas the shape changed from compound packing voids to occluded planar voids and vughs. Aggregates were flattened at contacts, became more angular and showed evidence of fusion into compound units. Related distribution patterns were altered from dominantly matrigranic to matrigranoidic, fragmoidic and porphyric with scattered vughs. There was a gradual closing of voids and a concomitant coalescence of aggregates. Plasmic fabrics showed mainly an increase in long (> 10 μm) and narrow (<5 μm) but sharply defined plasma separations. High bulk density resulted in a more vigorous and conspicuous expression of fabric unit deformation and movement. The pedological implications are discussed in relation to the dynamic properties of clay-water interactions, stress-strain regime of swelling soils, and the concept of plastic deformation of soils according to the Mohr-Coulomb theory of failure. © 1986.
Persistent Identifierhttp://hdl.handle.net/10722/157752
ISSN
2015 Impact Factor: 2.855
2015 SCImago Journal Rankings: 1.524

 

DC FieldValueLanguage
dc.contributor.authorJim, CYen_US
dc.date.accessioned2012-08-08T08:55:34Z-
dc.date.available2012-08-08T08:55:34Z-
dc.date.issued1986en_US
dc.identifier.citationGeoderma, 1986, v. 37 n. 2, p. 91-112en_US
dc.identifier.issn0016-7061en_US
dc.identifier.urihttp://hdl.handle.net/10722/157752-
dc.description.abstractThis experimental study examines the micromorphological changes resulting from confined swelling and shrinking of aggregated samples. Two factors, namely bulk density (two levels) and sample composition (five levels) were considered. Thin sections were cut and the microfabrics studied in detail both qualitatively and quantitatively. A broad range of significant and systematic microfabric changes were observed. With an increase in the activity and content of the clay fraction, the void volume (especially those >30 μm) decreased drastically whereas the shape changed from compound packing voids to occluded planar voids and vughs. Aggregates were flattened at contacts, became more angular and showed evidence of fusion into compound units. Related distribution patterns were altered from dominantly matrigranic to matrigranoidic, fragmoidic and porphyric with scattered vughs. There was a gradual closing of voids and a concomitant coalescence of aggregates. Plasmic fabrics showed mainly an increase in long (> 10 μm) and narrow (<5 μm) but sharply defined plasma separations. High bulk density resulted in a more vigorous and conspicuous expression of fabric unit deformation and movement. The pedological implications are discussed in relation to the dynamic properties of clay-water interactions, stress-strain regime of swelling soils, and the concept of plastic deformation of soils according to the Mohr-Coulomb theory of failure. © 1986.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/geodermaen_US
dc.relation.ispartofGeodermaen_US
dc.titleExperimental study of soil microfabrics induced by anisotropic stresses of confined swelling and shrinkingen_US
dc.typeArticleen_US
dc.identifier.emailJim, CY:hragjcy@hkucc.hku.hken_US
dc.identifier.authorityJim, CY=rp00549en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0022905119en_US
dc.identifier.volume37en_US
dc.identifier.issue2en_US
dc.identifier.spage91en_US
dc.identifier.epage112en_US
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridJim, CY=7006143750en_US

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