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POST-DREDGING RESIDUAL SEDIMENT STABILIZATION
Hayes, D.F. and B.I. Starr.
Proceedings of the Western Dredging Association Dredging Summit & Expo '17, Vancouver, British Columbia, Canada, June 26-29, 2017. p 462-472 + 19 slides, 2017

Where residual sediments are contaminated, post-dredging erosion can contribute significant constituent concentrations to the water column. One approach to reduce sediment and contaminant loss is to increase the critical shear stress of the residual sediments through amendments. Sand, bentonite, kaolin and lime, and a matrix of combinations were tested for relative effectiveness at increasing erosional strength of dilute sediments. Comparison of the sediment mixtures was performed using a SedFlume apparatus. Results indicated that bentonite clay provides the greatest resistance to erosion, requires the least mass addition per mass of treated sediment, and represents the most cost-effective admixture.
Paper: https://westerndredging.org/images/2017/proceedings/7a_3.pdf Slides: https://www.westerndredging.org/index.php/information/category/281-session-7a-sediment-remediation?download=1506:7a-3-post-dredging-residual-sediment-stabilization



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