20.500.12556/DKUM-70820 Determination of the fabric alteration of marine clays Določitev teksturnih sprememb v morski glini This paper presents details of investigations that were conducted to determine the fabric (i.e., the arrangement of soil grains and pores) of undisturbed marine clay samples that were retrieved from 5 m to 65 m below the seabed. Impedance Spectroscopy (IS), which is a non-destructive and non-invasive technique, was employed to determine the electrical conductivities of the marine clay samples in their longitudinal and transverse planes of sedimentation. These results were employed to define the extent of the fabric anisotropy in terms of an anisotropy coefficient, Ae, as a function of depth. In addition, Scanning Electron Microscopy (SEM) and Mercury Intrusion Porosimetry (MIP) were employed to study the fabric and pore-size distribution of these samples, respectively. Based on these investigations it has been observed that Ae increases with sampling depth, which is indicative of the alteration from flocculated fabric, at shallower depths, to the dispersed fabric, at deeper depths. The study highlights the importance and usefulness of the anisotropy coefficient, Ae, for determining the alteration in the fabric of marine clays, due to self-weight consolidation. V članku so opisane preiskave, izvedene za določitev teksture (t.j. razporejenosti zrn zemljine in por) intaktnih vzorcev morske gline, pridobljene z globin od 5 m do 65 m pod morskim dnom. Za določanje električne prevodnosti vzorcev morske gline v vzdolžnih in prečnih smereh sedimentacije je bila uporabljena impedančna spektroskopija, ki je neškodljiva in neinvazivna tehnika. Stopnje anizotropije v teksturi zemljin so izražene z anizotropnim koeficientom Ae kot funkcije globine. Za preučevanje teksture oziroma porazdelitve velikosti por teh vzorcev sta bila uporabljena vrstični elektronski mikroskop in živosrebrna porozimetrija. Rezultati raziskav so pokazali, da se Ae z globino poveča zaradi spremenjene razporejenosti zrn. V manjših globinah so zrna kosmičena in naključno orientirana, v večjih globinah pa razpršena in paralelno usmerjena. Študija poudarja pomembnost in uporabnost anizotropnega koeficienta Ae za določanje sprememb v teksturi morske gline zaradi zgostitve pod lastno težo. marine clays anisotropy laboratory tests sedimenti morska glina tekstura anizotropija laboratorijski testi true false true Angleški jezik Slovenski jezik Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru Znanstveno delo 2018-06-14 11:54:06 2018-06-14 11:54:59 2022-08-01 19:52:02 2019-07-11 18:20:55 2014 0 0 str. 21-33 št. 2 Letn. 11 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1854-0171 551.35:624.13 215987712 281009408 1854-0171 URN:SI:UM:DK:ASE1PBH0 Acta_geotechnica_Slovenica_2014_Gumaste_Determination_of_the_fabric_alteration_of_marine_clays.pdf Acta_geotechnica_Slovenica_2014_Gumaste_Determination_of_the_fabric_alteration_of_marine_clays.pdf 1 5493F14EB2D1A1992720E58C52C17AC6 0d3d313c94339efd103482aa1951e1aae28c042e77233a61235892237e296c78 08cebbc7-7c10-11eb-bb7a-00155d0001ca 20.500.12556/dkum/4834cc0f-cbd8-43c4-9dc1-cce54b267dcf https://dk.um.si/Dokument.php?lang=slv&id=125682 http://fgserver3.fg.um.si/journal-ags/2014-2/article-2.asp 1 https://dk.um.si/Dokument.php?lang=slv&id=125683 Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Acta geotechnica Slovenica 0 0 0