Mechanism of thawing

Document identifier: oai:DiVA.org:ltu-77774
Access full text here:10.1080/23311916.2020.1716438
Keyword: Engineering and Technology, Civil Engineering, Geotechnical Engineering, Teknik och teknologier, Samhällsbyggnadsteknik, Geoteknik, Freezing, Thawing, Image analysis, Frost actions, Laboratory freezing-thawing tests, Thaw settlement, Soil Mechanics
Publication year: 2020
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Abstract:

Freezing–thawing phenomena have been studied at laboratory scale for decades with various techniques and test setups. In this study, a freezing–thawing laboratory apparatus was supplemented with a camera in order to get a better understanding of ice formation during the freezing period and ice melting during the thawing period. The results from three thawing tests with identical samples but different boundary conditions are presented here. Water intends to migrate upward even when the entire frozen part has been thawed. That would cause excess pore water pressure and softening of the soil after the thawing period as well. Upward water migration after the thawing period is due to changes in thawed soil properties such as permeability and fine particle redistribution. The rate at which thawing takes place is a very important factor for thawing conditions. Moreover, freezing condition, i.e. access to water, has a high impact on thawing soil. If the volume of ice lenses is sufficient, frozen soil would fluidize during thawing.

Authors

Amin Zeinali

Luleå tekniska universitet; Geoteknologi
Other publications >>

Tommy Edeskär

Luleå tekniska universitet; Geoteknologi
Other publications >>

Jan Laue

Luleå tekniska universitet; Geoteknologi
Other publications >>

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        identifier: oai:DiVA.org:ltu-77774
        datestamp: 2021-04-19T12:42:32Z
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                version: 3.7
            recordInfo: 
                recordContentSource: ltu
                recordCreationDate: 2020-02-19
            identifier: 
                http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-77774
                10.1080/23311916.2020.1716438
                2-s2.0-85079431230
            titleInfo: 
                @attributes: 
                    lang: eng
                title: Mechanism of thawing
            abstract: 
Freezing–thawing phenomena have been studied at laboratory scale for decades with various techniques and test setups. In this study a freezing–thawing laboratory apparatus was supplemented with a camera in order to get a better understanding of ice formation during the freezing period and ice melting during the thawing period. The results from three thawing tests with identical samples but different boundary conditions are presented here. Water intends to migrate upward even when the entire frozen part has been thawed. That would cause excess pore water pressure and softening of the soil after the thawing period as well. Upward water migration after the thawing period is due to changes in thawed soil properties such as permeability and fine particle redistribution. The rate at which thawing takes place is a very important factor for thawing conditions. Moreover freezing condition i.e. access to water has a high impact on thawing soil. If the volume of ice lenses is sufficient frozen soil would fluidize during thawing.

            subject: 
                    @attributes: 
                        lang: eng
                        authority: uka.se
                    topic: 
                        Engineering and Technology
                        Civil Engineering
                        Geotechnical Engineering
                    @attributes: 
                        lang: swe
                        authority: uka.se
                    topic: 
                        Teknik och teknologier
                        Samhällsbyggnadsteknik
                        Geoteknik
                    @attributes: 
                        lang: eng
                    topic: freezing
                    @attributes: 
                        lang: eng
                    topic: thawing
                    @attributes: 
                        lang: eng
                    topic: image analysis
                    @attributes: 
                        lang: eng
                    topic: frost actions
                    @attributes: 
                        lang: eng
                    topic: laboratory freezing-thawing tests
                    @attributes: 
                        lang: eng
                    topic: thaw settlement
                    @attributes: 
                        lang: swe
                        authority: ltu
                    topic: Geoteknik
                    genre: Research subject
                    @attributes: 
                        lang: eng
                        authority: ltu
                    topic: Soil Mechanics
                    genre: Research subject
            language: 
                languageTerm: eng
            genre: 
                publication/journal-article
                ref
            note: 
                Published
                3
                
Validerad;2020;Nivå 2;2020-02-19 (johcin)

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                        Geoteknologi
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            originInfo: 
                dateIssued: 2020
                publisher: Taylor & Francis
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                titleInfo: 
                    title: Cogent Engineering
                identifier: 2331-1916
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                                type: volume
                            number: 7
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