Search results for "Collapsible Sand"

showing 3 items of 3 documents

The open metastable structure of a collapsible sand: fabric and bonding

2015

This paper deals with the compositional and textural characteristics determining open metastable structures in the pleistocenic sand outcropping in the Agrigento district (Sicily). The aim of the study was to individuate the bonding types occurring between grains that could generate matric suction phenomena. The composition and microfabric were characterised by means of granulometry, porosimetry, permeability, optical and ESEM-EDS microscopy, thermogravimetry and XR diffractometry, electric conductivity, and ionic chromatography. The data thus acquired show that the skeleton of the sand is constituted mostly by bioclasts and microfossils, calcite and quartz monocrystalline grains. Moreover,…

0211 other engineering and technologiesMineralogyMicrostructure and porosity02 engineering and technologySilt010502 geochemistry & geophysics01 natural scienceschemistry.chemical_compoundPorosityQuartz021101 geological & geomatics engineering0105 earth and related environmental sciencesCalciteSettore ICAR/07 - GeotecnicaCapillary condensationFabric and bondingGeologyPorosimetryGeotechnical Engineering and Engineering GeologyCementation (geology)Unsaturated collapsible sandSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiPetrographical and chemical analysichemistryGranulometryMatric suctionSettore GEO/05 - Geologia ApplicataGeologyBulletin of Engineering Geology and the Environment
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Collapsible intact soil stabilisation using non-aqueous polymeric vehicle

2020

Abstract This paper presents the results of an experimental study that had the goal of understanding the effects of treatment with polyethylene glycol (PEG)/nanolime mixtures on collapsible soil behaviour. In a previous study, the use of pure PEG offered a good improvement in the stability of collapsible soil, but the stabilisation effect only lasted for a limited time. To investigate the stabilisation potential of PEG/nanolime systems for collapsible sand, different mixtures were prepared at increasing nanolime weight ratios. The suitability of the stabilised soil was examined on the basis of collapsibility, oedometer, shear, and water vapour permeability tests, and through optical microsc…

Materials scienceCollapsible Sands Stabilisation Compressibility Shear strength PEG NanolimeScanning electron microscope0211 other engineering and technologies02 engineering and technologyPolyethylene glycol010502 geochemistry & geophysics01 natural scienceslaw.inventionchemistry.chemical_compoundOptical microscopelawPEG ratioComposite material021101 geological & geomatics engineering0105 earth and related environmental sciencesCollapsible SandAqueous solutionSettore ICAR/07 - GeotecnicaCompressibilityGeologyGeotechnical Engineering and Engineering GeologyOedometer testPEGSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialichemistryShear strengthSoil waterCompressibilityStabilisationSettore GEO/05 - Geologia ApplicataNanolime
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Evaluation of cliff recession in the Valle dei Templi in Agrigento (Sicily)

2015

Abstract The sacral complex of the Valle dei Templi in Agrigento, added in the UNESCO Heritage Site List, stands over the crest of a rigid calcarenite cuesta, which overlies a layer of partially saturated (S = 6–12%) carbonate sand. In turn, the sand stratum lies on a thick stratum of clays. The environment is highly prone to landslides as highlighted by several previous studies that identify the undermining of slopes and the discontinuity pattern, occurred in the late Neotectonic phase, as causes of cliff failure. For wider and less exposed areas, where the undermining local instabilities can be present because of the specific morphology of the site, a recent research has proposed a new in…

geographygeography.geographical_feature_categorySettore ICAR/07 - GeotecnicaArchaeological siteRemote sensing monitoringGeologyLandslideSuctionGeotechnical Engineering and Engineering GeologyCalcareniteCuestaCollapsible sandDiscontinuity (geotechnical engineering)RockfallArchaeological site Collapsible sandSuctionRemote sensing monitoringCliffGeotechnical engineeringDirect shear testRock mass classificationArchaeological site; Collapsible sand; Remote sensing monitoring; Suction; Geotechnical Engineering and Engineering Geology; GeologySettore GEO/05 - Geologia ApplicataGeologyEngineering Geology
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