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dc.creatorStanić, Filip
dc.creatorCui, Yu-Jun
dc.creatorDelage, Pierre
dc.creatorDe Laure, Emmanuel
dc.creatorVersini, Pierre-Antoine
dc.creatorSchertzer, Daniel
dc.creatorTchiguirinskaia, Ioulia
dc.date.accessioned2024-01-08T09:10:38Z
dc.date.available2024-01-08T09:10:38Z
dc.date.issued2019
dc.identifier.issn0149-6115
dc.identifier.urihttps://grafar.grf.bg.ac.rs/handle/123456789/3368
dc.description.abstractThe determination of the water retention curve (WRC) and hydraulic conductivity function (HCF) of a specific volcanic coarse granular material used as a substrate for urban green roofs in Europe was carried out on a newly developed specific device in which low suctions, typical of coarse granular materials, were controlled. Smaller suctions (up to 32 kPa) were imposed by using a hanging column system, and larger suctions (between 32 and 50 kPa) were imposed by using the axis translation technique in the same cell. The changes in suction during the tests were monitored by using a high accuracy differential pressure transducer. They were also used to determine the HCF by means of both Kunze and Kirkham’s and Gardner’s methods. The former technique was used at low suctions (<4 kPa) to account for the impedance effects due to the high air entry value ceramic porous disk and the latter was used between 4 and 50 kPa. Good comparability was observed in the data from both methods, demonstrating the good perfor- mance of the device. The mathematical expressions of the WRC of van Genuchten and Brooks and Corey were used, and a good fitting with our experimental data was obtained. Conversely, the HCFs derived from these expressions appeared to lead to a significant underestimation, con- firming the need of an operational and simple device for the experimental determination of the HCF. Also, this material proved to be an appropriate material for green urban infrastructures, because of its lightweight, satisfactory water retention capability and hydraulic conductivity.sr
dc.language.isoensr
dc.publisherASTM Compasssr
dc.publisherASTM International (American Society For Testing and Materials)sr
dc.rightsopenAccesssr
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourceGeotechnical Testing Journal (GTJ)sr
dc.subjectgreen-roof materialsr
dc.subjectwater retentionsr
dc.subjecthydraulic conductivitysr
dc.subjecthanging columnsr
dc.subjectaxis translationsr
dc.subjectGardner’s methodsr
dc.subjectKunze and Kirkham’s methodsr
dc.titleA Device for the Simultaneous Determination of the Water Retention Properties and the Hydraulic Conductivity Function of an Unsaturated Coarse Material; Application to a Green-Roof Volcanic Substratesr
dc.typearticlesr
dc.rights.licenseBY-NC-NDsr
dc.citation.issue3
dc.citation.rankM23
dc.citation.volume43
dc.identifier.doi10.1520/GTJ20170443
dc.identifier.fulltexthttp://grafar.grf.bg.ac.rs/bitstream/id/12587/bitstream_12587.pdf
dc.type.versionpublishedVersionsr


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