20.500.12556/DiRROS-24691 Toward the sustainable stabilization of dredged sediment using biopolymers a mechanical performance study 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. dredged sediment biopolymer stabilization mechanical characterization izkopani sediment biopolimer stabilizacija mehanska karakterizacija true false true Elsevier Angleški jezik Slovenski jezik © 2025 The Author(s) Neznano 2025-12-12 13:27:29 2026-01-13 10:24:18 2026-01-14 03:53:33 0000-00-00 00:00:00 2025 0 0 str. 1-13 [article no.] 108233 Vol. 28 Dec. 2025 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 2025-11-17 624 2590-1230 10.1016/j.rineng.2025.108233 259327491 https://doi.org/10.1016/j.rineng.2025.108233 0 ee8864f9-d755-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=36869 RAZ_Ghafoori_Yaser_2025.pdf RAZ_Ghafoori_Yaser_2025.pdf 1 2D37185473D83825CD9D2E495FBD26FA 29e41ac54488516dd7e0ac541a0cd2fa7af369e9f6a04fe6b9935cb2b3569c60 8c77f5e7-f061-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=37942 Zavod za gradbeništvo Slovenije 0 0 0