Filtracijske lastnosti morskega mulja z in brez kemijskih dodatkov : magistrsko delo

Mikuletič, Tim (author), Petkovšek, Ana (mentor), Smolar, Jasna (comentor)

Za zagotavljanje varne in konkurenčne plovbe je potrebno stalno vzdrževanje in poglabljanje morskih in kopenskih plovnih poti. Pri tem nastajajo velike količine sedimentov, katerih lastnosti so odvisne od značaja geološkega okolja in antropogenih vplivov. Z okoljskega vidika so izkopani sedimenti lahko onesnaženi tako zaradi pristaniške dejavnosti kot zaradi vplivov industrije, rudarstva in neurejene komunalne infrastrukture v širšem zaledju. V mehanskem smislu je značilnost izkopanih sedimentov visoka vsebnost vode in zaradi tega zelo omejene možnosti rabe v gradbeništvu. V magistrskem delu smo najprej pregledali regulativo, ki se dotika ravnanja z vodnimi sedimenti in opise prakse ravnanja v nekateri velikih evropskih lukah, med njimi tudi v Luki Koper. V Luki Koper se sedimenti po izkopu transportirajo na kopno, kjer se v namensko zgrajenih lagunah sušijo in konsolidirajo 3-5 let. Postopek je časovno in prostorsko potraten, zato smo v nalogi raziskali, ali je možno z uporabo kemijskih dodatkov ter ožemanjem pospešiti sedimentacijo in konsolidacijo. Osnovnemu materialu smo dodajali štiri različne kemijske dodatke in opazovali spremembe lastnosti materialov. Raziskovalni del je temeljil na standardnih preiskavah in alternativnih preiskavah, kot sta npr.: preskus sedimentacije v valjih in preskus filtracije skozi kolač (vakuumske filtracije).

• Language: Slovenian
• Keywords: morski sediment, apno, železov klorid, filtrabilnost, ravnanje s sedimenti, vlažnost, suha gostota, gradbeništvo, magistrska dela, geotehnika
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Place of publishing: Ljubljana
• Publisher: [T. Mikuletič]
• Year: 2020
• Number of pages: XIV, 70 str., [7] str. pril.
• PID: 20.500.12556/RUL-114238
• UDC: 551.35:624.131.526(497.4)(043.3)
• COBISS.SI-ID: 15537667
• Publication date in RUL: 20.02.2020

MIKULETIČ, Tim, 2020, Filtracijske lastnosti morskega mulja z in brez kemijskih dodatkov : magistrsko delo [online]. Master’s thesis. Ljubljana : T. Mikuletič. [Accessed 26 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=114238

Secondary language

• Language: English
• Title: Filtration properties of dredged marine sediment with or without chemical additives : master thesis

Abstract

Continuous dredging and maintenance of maritime and inland waterways are required to ensure safe and competitive navigation. This produces large amounts of sediment, the properties of which depend on the nature of the geological environment of hinterland and anthropogenic impacts. From an environmental point of view, excavated sediments can be polluted by port activity and by the impacts of industry, mining and unregulated communal infrastructure - sewage in the influental hinterland. Potential use of excavated sediments in built environment is limited due to high water content. This thesis focuses on the legislation for water sediments management and on its current practice in the major European ports, including Port of Koper. In the Port of Koper, dredged sediment is presently pumped as slurry into temporary lagoons where the sedimentation and consolidation processes start. Even after few years of resting, dredged sediment in lagoons remain in liquid consistency. Consequently, these large areas are unsuitable for the development of port infrastructure. Due to this, one of the objectives in this thesis was to assess the influence of chemical additives on the slurry sedimentation and consolidation. Also the influence of chemical additives on filterability of slurry and filter cake resistance were investigated. Standard and advanced (alternative) laboratory tests were carried out to determine behaviors of dredged sediment slurry with the addition of four different chemical additives.

• Keywords: dredged marine sediment, lime, ferric chloride, filterability, sediment management, water content, dry density civil engineering, masters thesis, geotechnics