DC FieldValueLanguage
dc.contributorDepartment of Civil and Environmental Engineering-
dc.creatorNg, CWWen_US
dc.creatorOwusu, STen_US
dc.creatorZhou, Cen_US
dc.creatorChiu, ACFen_US
dc.date.accessioned2021-04-09T08:50:08Z-
dc.date.available2021-04-09T08:50:08Z-
dc.identifier.issn0013-7952en_US
dc.identifier.urihttp://hdl.handle.net/10397/89505-
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectLateritic soilen_US
dc.subjectSesquioxides contenten_US
dc.subjectUnsaturated soilen_US
dc.subjectWater retention curveen_US
dc.titleEffects of sesquioxide content on stress-dependent water retention behaviour of weathered soilsen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.spage1en_US
dc.identifier.epage13en_US
dc.identifier.volume266en_US
dc.identifier.doi10.1016/j.enggeo.2019.105455en_US
dcterms.abstractLateritic soils generally have high content of iron and aluminium oxides (i.e., content of sesquioxides), which are found able to enhance soil aggregation and therefore to alter pore size distributions. So far, however, there is no study on the influence of sesquioxides on the stress-dependent soil water retention curves (SDSWRCs) of unsaturated soils. In this study, SDSWRCs of compacted lateritic clay (LAT) were measured at various stress levels using a modified stress-controllable pressure plate apparatus. The results were compared with the SDSWRCs of two other weathered soils, including sandy silt (i.e., CDV) and a gravely sand (i.e., CDG). These three soils have different sesquioxide contents (i.e., 38% for LAT, 27% for CDV and 19% for CDG). Moreover, scanning electron microscopy (SEM) tests were carried out to analyse the microstructures of these three soils. At a given stress, it was found that the LAT had the lowest water retention ability among the three soils, even though it had the most clay particles. This is mainly because most clay particles in the LAT formed aggregates due to its high sesquioxide content, altering the pore size distribution. Consequently, the LAT specimen had many large-size inter-aggregate pores, as revealed by the SEM images. Furthermore, the influence of stress on the water retention ability of the LAT seems negligible in the stress range considered (0–120 kPa). On the contrary, the water retention ability of CDV and CDG increases with an increase in net stress, likely attributed to a reduction in average pore size under compression.-
dcterms.accessRightsembargoed access-
dcterms.bibliographicCitationEngineering geology, 5 Mar. 2020, v. 266, 105455, p. 1-13, https://doi.org/10.1016/j.enggeo.2019.105455en_US
dcterms.isPartOfEngineering geologyen_US
dcterms.issued2020-03-05-
dc.identifier.scopus2-s2.0-85076512927-
dc.identifier.eissn1872-6917en_US
dc.identifier.artn105455en_US
dc.description.validate202104 bcvc-
dc.description.oaNot applicable-
dc.identifier.FolderNumbera0692-n11-
dc.identifier.SubFormID971-
dc.description.fundingSourceRGC-
dc.description.fundingText16204817, AoE/E-603/18, T22-603/15N-
dc.description.pubStatusEarly release-
dc.date.embargo2022.03.05en_US
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