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Investigation of increased hydraulic conductivity of silty till subjected to freeze–thaw cycles
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-1365-8552
2013 (English)In: no STP 1568, 33-46 p., STP156820120139Article in journal (Refereed) Published
Abstract [en]

The hydraulic conductivity of silty till increases when the till is subjected to freeze–thaw cycles. A dramatic increase normally occurs after the first freeze–thaw cycle, and the magnitude generally depends on the initial or molding water content. Freezing of silty till causes aggregations of clods and the formation of macrostructure. The initial or molding water content determines the number of freeze–thaw cycles required to complete the agglomeration of clods and the formation of stable macrostructures, which in turn controls the hydraulic conductivity of compacted specimens frozen and thawed in the laboratory. The findings of this study show that for specimens compacted wet of the optimum water content, a significant increase in the hydraulic conductivity was measured after the first freeze–thaw cycle. When specimens were compacted at the optimum water content, a number of freeze–thaw cycles were required in order to obtain the corresponding significant increase in the hydraulic conductivity.

Place, publisher, year, edition, pages
2013. no STP 1568, 33-46 p., STP156820120139
Keyword [en]
hydraulic conductivity, Freeze–Thaw, Silty Till, macrostructure, dry cover, clods, microstructure, Till, Clay, Mining, hydraulic conductivity, Freeze–Thaw, clay, till, wastes, Till, Freeze–Thaw, hydraulic conductivity, Permeability, land cover, Civil engineering and architecture - Geoengineering and mining engineering, Civil engineering and architecture - Architecture and architectural conservation and restoration, Materials science - Construction materials
Keyword [sv]
Samhällsbyggnadsteknik och arkitektur - Geoteknik och gruvteknik, Samhällsbyggnadsteknik och arkitektur - Arkitektur och bebyggelsevård, Teknisk materialvetenskap - Konstruktionsmaterial
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-37049DOI: 10.1520/STP156820120139Local ID: aec2f308-25f2-4697-b00f-d45be81aed7bOAI: oai:DiVA.org:ltu-37049DiVA: diva2:1010547
Conference
Symposium on Mechanical Properties of Frozen Soils : 31/01/2013 - 31/01/2013
Note

Godkänd; 2013; 20121204 (makusa)

; Konferensartikel i tidskriftAvailable from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-10-19Bibliographically approved

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Publisher's full texthttp://www.astm.org/10.1520/STP20120139http://www.astm.org/DIGITAL_LIBRARY/STP/stp_toclist_year.htm

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CiteExportLink to record
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