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1352. Stabilization of dredged marine sediment using biopolymerYaser Ghafoori, Parisa Samadi, Pooria Ghadir, Stanislav Lenart, Sabina Dolenec, Hamed Khodadadi Tirkolae, 2025, published scientific conference contribution Abstract: The frequent dredging of sediments from port areas often leads to the rapid accumulation of excess material, potentially resulting in landfill challenges. Dredged marine sediments typically exhibit high water content, a significant proportion of fine-grained soil, limited bearing capacity, substantial settlement tendencies, and low shear strength. Addressing these issues is imperative for construction projects on such soil types. Recent trends in soil stabilization have witnessed the rising popularity of sustainable bio-binders, particularly biopolymers, owing to their environmentally friendly attributes and extensive use in various geoenvironmental applications. This study investigates the utilization of four different types of biopolymers for the stabilization of marine dredged sediment sourced from the Port of Koper, Slovenia. The research investigates the influence of biopolymer incorporation on the geotechnical properties of biopolymer-treated sediment through Atterberg limits and cone falling tests. In addition, samples were analyzed by scanning electron microscopy (SEM) to elucidate the interaction between biopolymer and the sediment. The findings demonstrate a significant enhancement of undrained shear strength with the addition of biopolymers to the sediment. The formation of hydrogel within the soil pores not only increases the sediment consistency but also positively affects the soil's shear strength.
Keywords: marine sediment, biopolymer, stabilization, consistency, undrained shear strength
Published in DiRROS: 11.08.2025; Views: 333; Downloads: 186
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1353. Influence of surface preparation and surface topography on tensile shear strength of polyurethane adhesively bonded beech wood single-lap joints : a finite element method approachLuka Naumovski, Martin Capuder, Jakub Michal Sandak, Boris Azinović, 2025, original scientific article Abstract: In this study, the mechanical properties of bonded single-lap joints are analysed by tensile lap shear tests on beech wood. A one-component polyurethane adhesive was used, and three different methods of surface preparation were applied: planing, sanding along the grain, and sanding perpendicular to the grain. Prior to bonding, the wooden lamellae underwent laser scanning to obtain surface profiles, which were then analysed for surface roughness. Scanned surface topographies with their features were integrated into the finite element analysis (FEA) software COMSOL Multiphysics to simulate the lap shear bonding area for different surface profiles and roughness. The FEA model implements linear material models, which represent the adherend and thin adhesive layer, combined with a modified local cohesive zone model for the adhesive bond interfacial forces. The experimental tests were conducted in a dry environment, where a higher surface roughness achieved by sanding correlated with a higher tensile shear strength. This increased surface roughness was attributed to the enhanced mechanical interlocking mechanism. This finding aligns with the FE analysis, which showed that increased surface roughness, micropillars and indentations, led to variations in stress concentration and distribution compared to a smooth surface bond.
Keywords: beech wood, mechanical interlocking, surface modification, polyurethane, finite element modeling
Published in DiRROS: 11.08.2025; Views: 374; Downloads: 173
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1354. Kapecitabin pri zdravljenju bolnikov z rakom : bolnikov dnevnikJanja Ocvirk, Martina Reberšek, Marko Boc, Jernej Benedik, Zvezdana Hlebanja, Neva Volk, Tanja Mesti, 2023, dictionary, encyclopaedia, lexicon, manual, atlas, map Keywords: citostatiki, kapecitabin, bolniki
Published in DiRROS: 08.08.2025; Views: 449; Downloads: 121
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1356. Liposomski irinotekan za zdravljenje napredovalega raka trebušne slinavkeJanja Ocvirk, Martina Reberšek, Tanja Mesti, Neva Volk, Marko Boc, Marija Ignjatović, Nežka Hribernik, 2023, dictionary, encyclopaedia, lexicon, manual, atlas, map Keywords: rak trebušne slinavke, kemoterapija, onkološko zdravljenje
Published in DiRROS: 08.08.2025; Views: 468; Downloads: 110
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1357. Trifluridin/tipiracil za zdravljenje razširjenega raka debelega črevesa in danke in raka želodca : dnevnik za bolnikaJanja Ocvirk, Martina Reberšek, Tanja Mesti, Neva Volk, Marko Boc, Marija Ignjatović, Nežka Hribernik, 2023, dictionary, encyclopaedia, lexicon, manual, atlas, map Keywords: rak debelega črevesa, rak danke, razširjeni rak, kemoterapija, bolniki, navodila
Published in DiRROS: 08.08.2025; Views: 380; Downloads: 116
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1358. Olaparib za zdravljenje raka jajčnikovErik Škof, Breda Škrbinc, Brigita Gregorič, 2023, dictionary, encyclopaedia, lexicon, manual, atlas, map Keywords: rak jajčnikov, zaviralci PARP, olaparib, gen dovzetnosti za pojav raka dojk, BRCA
Published in DiRROS: 08.08.2025; Views: 425; Downloads: 113
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1359. Zdravljenje z radijevim kloridom : informacije za bolnikaBoštjan Šeruga, 2023, dictionary, encyclopaedia, lexicon, manual, atlas, map Keywords: rak prostate, radijev klorid, terapevtska uporaba, zdravljenje, neželeni učinki
Published in DiRROS: 08.08.2025; Views: 430; Downloads: 109
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