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Query: "author" (Pooria Ghadir) .

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1.
Toward the sustainable stabilization of dredged sediment using biopolymers : a mechanical performance study
Yaser Ghafoori, Pooria Ghadir, Sabina Dolenec, Stanislav Lenart, 2025, original scientific article

Abstract: Each year, over one billion cubic meters of sediments are dredged from ports and inland water bodies to maintain navigability and ensure infrastructure safety, creating significant landfill and environmental challenges. Dredged sediments are typically characterized by high moisture content, low bearing capacity, and limited shear strength. Their sustainable reuse requires effective stabilization and remediation strategies. Recent advancements in soil stabilization have increasingly focused on sustainable bio-binders, particularly biopolymers, due to their ecofriendly properties. This study evaluates the effectiveness of four biopolymers, namely calcium alginate (AL), chitosan (CH), xanthan gum (XA), and guar gum (GG) as sustainable bio-binders for improving dredged sediments from the Port of Koper, Slovenia. Mechanical testing demonstrated that 1 wt% XA, AL, and CH increased unconfined compressive strength by 40 %, 29 %, and 10 %, respectively. Direct shear tests revealed that AL and XA increased cohesion by 52 % and 104 %, respectively, while reducing the friction angle by 4◦ In contrast, CH and GG enhanced both cohesion (by 81 % and 37 %, respectively) and the friction angle (by 1◦ in each case). Consolidation characteristics were also improved, with reduced settlement under normal load. Microstructural analysis identified the formation of biopolymer matrices including fibrous networks, gel films, and particle clusters that explain the mechanical improvements. The findings confirm that biopolymer stabilization is a viable technique to convert dredged marine sediments into engineered materials, minimizing landfill disposal, and supporting the transition to more sustainable construction practices.
Keywords: dredged sediment, biopolymer, stabilization, mechanical characterization
Published in DiRROS: 13.01.2026; Views: 326; Downloads: 190
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2.
Stabilization of dredged marine sediment using biopolymer
Yaser 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: 593; Downloads: 340
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