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A laboratory test study on effect of freeze–thaw cycles on strength and hydraulic conductivity of stabilized dredged sediments
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0003-3078-1883
Strategic services & Sustainable Development at Ecoloop, Luleå tekniska universitet, SCC/Ramböll, Ecoloop, Stockholm.
Statens Geotekniska Institut, Linköping, Luleå tekniska universitet.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-1365-8552
2016 (English)In: Canadian geotechnical journal (Print), ISSN 0008-3674, E-ISSN 1208-6010, Vol. 53, no 6, p. 1038-1045Article in journal (Refereed) Published
Abstract [en]

Dredged sediments with initial water content between 200% and 400% were treated with single and composite binders. Samples were subjected to open and semi-closed freeze-thaw (f-t) cycles to investigate the impact of f-t cycling on hydraulic conductivity (HC) and unconfined compressive strength (UCS). A grace period (GP) for thaw consolidation is included to assess healing potential of the affected stabilized mass. The findings of this study show that the impact of f-t cycles depend on initially achieved UCS and HC values prior to the f-t cycling and time of testing after f-t cycles. The HC of specimens with initially UCS value of 87 kPa increased with number of f-t cycles. The UCS values decreased in the range of 50%-80% when specimens were tested directly after the thaw period and values decreased in the range of 14%-60% when specimens were tested at the end of GP. The HC of specimens with initial UCS value of 299 kPa remained almost the same. These samples experienced permanent loss in the UCS values, irrespective of time of testing. Detrimental effects of the freezing action on the UCS were greater under semi-closed than open freezing conditions.

Place, publisher, year, edition, pages
2016. Vol. 53, no 6, p. 1038-1045
Keywords [en]
stabilization, solidification, freeze-thawing, dredging, unconfined compressive strength, thaw weakening, thaw consolidation, binders, cement, Fly ash, slag, stabilization-solidification, hydraulic conductivity, Freeze–Thaw cycling, Freeze–Thaw
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-13165DOI: 10.1139/cgj-2015-0295ISI: 000377307700012Scopus ID: 2-s2.0-84969922993Local ID: c5a33f46-7f39-49ed-986c-08daa4055413OAI: oai:DiVA.org:ltu-13165DiVA, id: diva2:986117
Note

Validerad; 2016; Nivå 2; 20151001 (makusa)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2019-05-06Bibliographically approved

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Makusa, GregoryKnutsson, Sven

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