Microfabric effects in frozen clays in relation to geotechnical parameters
Identifieur interne : 000D53 ( PascalFrancis/Corpus ); précédent : 000D52; suivant : 000D54Microfabric effects in frozen clays in relation to geotechnical parameters
Auteurs : Maria Hohmann-PorebskaSource :
- Applied clay science [ 0169-1317 ] ; 2002.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
The thermodynamic conditions within frozen ground at temperatures just below 0 °C cause continuing translocation of water, ice and the displacement of mineral skeleton. The consideration of a wide range of micro-fabric transformations after freezing provides useful clues to the understanding the mechanism of void channel formation, which leads to increased permeability and changes in the shear resistance of soils. Microstructure observations, frost heave, water intake, permeability and shear strength measurements revealed the dynamic nature of cryogenic alterations. This paper deals with the effects of freeze-thaw on microstructure of clayey soils and soil-bentonite mixtures in relation to changes of the permeability and the shear strength. The SEM analysis was employed to study directly cryogenic alterations within clayey soils particularly close to the shearing plane and after permeability tests. The results show that the modifications of fabric are progressive and occur before their transition to the frozen stage and in the negative temperature range. Aggregates of fabric created by ice lensing are generally stable. A very significant increase of the permeability was observed after freezing and thawing. In this study, the magnitude of changes measured was in the range between two and three orders the original value. The shear strength parameters of unfrozen samples and frozen close to the freezing front do not vary significantly. The temperature effects on the shear strength are mainly reflected in cohesion.
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Format Inist (serveur)
| NO : | PASCAL 02-0235886 INIST |
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| ET : | Microfabric effects in frozen clays in relation to geotechnical parameters |
| AU : | HOHMANN-POREBSKA (Maria); CZURDA (Kurt A.); WAGNER (Jean-Frank) |
| AF : | Department of Applied Geology, Karlsruhe University/7500 Karlsruhe/Allemagne (1 aut.); Department of Applied Geology, University of Karlsruhe, Kaiserstr. 12/76128 Karlsruhe/Allemagne (1 aut.); Geology Department, Faculty VI, University of Trier, Behringstrasse/54286 Trier/Allemagne (2 aut.) |
| DT : | Publication en série; Niveau analytique |
| SO : | Applied clay science; ISSN 0169-1317; Coden ACLSER; Pays-Bas; Da. 2002; Vol. 21; No. 1-2; Pp. 77-87; Bibl. 19 ref. |
| LA : | Anglais |
| EA : | The thermodynamic conditions within frozen ground at temperatures just below 0 °C cause continuing translocation of water, ice and the displacement of mineral skeleton. The consideration of a wide range of micro-fabric transformations after freezing provides useful clues to the understanding the mechanism of void channel formation, which leads to increased permeability and changes in the shear resistance of soils. Microstructure observations, frost heave, water intake, permeability and shear strength measurements revealed the dynamic nature of cryogenic alterations. This paper deals with the effects of freeze-thaw on microstructure of clayey soils and soil-bentonite mixtures in relation to changes of the permeability and the shear strength. The SEM analysis was employed to study directly cryogenic alterations within clayey soils particularly close to the shearing plane and after permeability tests. The results show that the modifications of fabric are progressive and occur before their transition to the frozen stage and in the negative temperature range. Aggregates of fabric created by ice lensing are generally stable. A very significant increase of the permeability was observed after freezing and thawing. In this study, the magnitude of changes measured was in the range between two and three orders the original value. The shear strength parameters of unfrozen samples and frozen close to the freezing front do not vary significantly. The temperature effects on the shear strength are mainly reflected in cohesion. |
| CC : | 226B01; 001E01O01 |
| FD : | Argile; Sol gelé; Thermodynamique; Température; Glace; Déplacement; Fabrique; Transformation; Congélation; Mécanisme; Microscopie électronique; Donnée MEB; Perméabilité; Microstructure; Microfabrique; Résistance cisaillement; Dynamique; Altération |
| FG : | Roche clastique; Roche sédimentaire; Sol |
| ED : | clay; frozen ground; thermodynamics; temperature; ice; displacements; fabric; transformations; freezing; mechanism; electron microscopy; SEM data; permeability; microstructures; shear strength; dynamics; alteration |
| EG : | clastic rocks; sedimentary rocks; soils |
| SD : | Arcilla; Suelo helado; Termodinámica; Temperatura; Hielo; Fábrica; Transformación; Congelación; Microscopía electrónica; Dato MEB; Permeabilidad; Microestructura; Resistencia cizallamiento; Dinámica; Alteración |
| LO : | INIST-20859.354000100846800080 |
| ID : | 02-0235886 |
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Pascal:02-0235886Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Microfabric effects in frozen clays in relation to geotechnical parameters</title><author><name sortKey="Hohmann Porebska, Maria" sort="Hohmann Porebska, Maria" uniqKey="Hohmann Porebska M" first="Maria" last="Hohmann-Porebska">Maria Hohmann-Porebska</name><affiliation><inist:fA14 i1="01"><s1>Department of Applied Geology, Karlsruhe University</s1><s2>7500 Karlsruhe</s2><s3>DEU</s3><sZ>1 aut.</sZ></inist:fA14></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">02-0235886</idno><date when="2002">2002</date><idno type="stanalyst">PASCAL 02-0235886 INIST</idno><idno type="RBID">Pascal:02-0235886</idno><idno type="wicri:Area/PascalFrancis/Corpus">000D53</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Microfabric effects in frozen clays in relation to geotechnical parameters</title><author><name sortKey="Hohmann Porebska, Maria" sort="Hohmann Porebska, Maria" uniqKey="Hohmann Porebska M" first="Maria" last="Hohmann-Porebska">Maria Hohmann-Porebska</name><affiliation><inist:fA14 i1="01"><s1>Department of Applied Geology, Karlsruhe University</s1><s2>7500 Karlsruhe</s2><s3>DEU</s3><sZ>1 aut.</sZ></inist:fA14></affiliation></author></analytic><series><title level="j" type="main">Applied clay science</title><title level="j" type="abbreviated">Appl. clay sci.</title><idno type="ISSN">0169-1317</idno><imprint><date when="2002">2002</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Applied clay science</title><title level="j" type="abbreviated">Appl. clay sci.</title><idno type="ISSN">0169-1317</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>SEM data</term><term>alteration</term><term>clay</term><term>displacements</term><term>dynamics</term><term>electron microscopy</term><term>fabric</term><term>freezing</term><term>frozen ground</term><term>ice</term><term>mechanism</term><term>microstructures</term><term>permeability</term><term>shear strength</term><term>temperature</term><term>thermodynamics</term><term>transformations</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Argile</term><term>Sol gelé</term><term>Thermodynamique</term><term>Température</term><term>Glace</term><term>Déplacement</term><term>Fabrique</term><term>Transformation</term><term>Congélation</term><term>Mécanisme</term><term>Microscopie électronique</term><term>Donnée MEB</term><term>Perméabilité</term><term>Microstructure</term><term>Microfabrique</term><term>Résistance cisaillement</term><term>Dynamique</term><term>Altération</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The thermodynamic conditions within frozen ground at temperatures just below 0 °C cause continuing translocation of water, ice and the displacement of mineral skeleton. The consideration of a wide range of micro-fabric transformations after freezing provides useful clues to the understanding the mechanism of void channel formation, which leads to increased permeability and changes in the shear resistance of soils. Microstructure observations, frost heave, water intake, permeability and shear strength measurements revealed the dynamic nature of cryogenic alterations. This paper deals with the effects of freeze-thaw on microstructure of clayey soils and soil-bentonite mixtures in relation to changes of the permeability and the shear strength. The SEM analysis was employed to study directly cryogenic alterations within clayey soils particularly close to the shearing plane and after permeability tests. The results show that the modifications of fabric are progressive and occur before their transition to the frozen stage and in the negative temperature range. Aggregates of fabric created by ice lensing are generally stable. A very significant increase of the permeability was observed after freezing and thawing. In this study, the magnitude of changes measured was in the range between two and three orders the original value. The shear strength parameters of unfrozen samples and frozen close to the freezing front do not vary significantly. The temperature effects on the shear strength are mainly reflected in cohesion.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0169-1317</s0></fA01><fA02 i1="01"><s0>ACLSER</s0></fA02><fA03 i2="1"><s0>Appl. clay sci.</s0></fA03><fA05><s2>21</s2></fA05><fA06><s2>1-2</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Microfabric effects in frozen clays in relation to geotechnical parameters</s1></fA08><fA09 i1="01" i2="1" l="ENG"><s1>Clay barriers and waste management</s1></fA09><fA11 i1="01" i2="1"><s1>HOHMANN-POREBSKA (Maria)</s1></fA11><fA12 i1="01" i2="1"><s1>CZURDA (Kurt A.)</s1><s9>ed.</s9></fA12><fA12 i1="02" i2="1"><s1>WAGNER (Jean-Frank)</s1><s9>ed.</s9></fA12><fA14 i1="01"><s1>Department of Applied Geology, Karlsruhe University</s1><s2>7500 Karlsruhe</s2><s3>DEU</s3><sZ>1 aut.</sZ></fA14><fA15 i1="01"><s1>Department of Applied Geology, University of Karlsruhe, Kaiserstr. 12</s1><s2>76128 Karlsruhe</s2><s3>DEU</s3><sZ>1 aut.</sZ></fA15><fA15 i1="02"><s1>Geology Department, Faculty VI, University of Trier, Behringstrasse</s1><s2>54286 Trier</s2><s3>DEU</s3><sZ>2 aut.</sZ></fA15><fA20><s1>77-87</s1><s7>3</s7></fA20><fA21><s1>2002</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>20859</s2><s5>354000100846800080</s5></fA43><fA44><s0>0000</s0><s1>© 2002 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>19 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>02-0235886</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Applied clay science</s0></fA64><fA66 i1="01"><s0>NLD</s0></fA66><fC01 i1="01" l="ENG"><s0>The thermodynamic conditions within frozen ground at temperatures just below 0 °C cause continuing translocation of water, ice and the displacement of mineral skeleton. The consideration of a wide range of micro-fabric transformations after freezing provides useful clues to the understanding the mechanism of void channel formation, which leads to increased permeability and changes in the shear resistance of soils. Microstructure observations, frost heave, water intake, permeability and shear strength measurements revealed the dynamic nature of cryogenic alterations. This paper deals with the effects of freeze-thaw on microstructure of clayey soils and soil-bentonite mixtures in relation to changes of the permeability and the shear strength. The SEM analysis was employed to study directly cryogenic alterations within clayey soils particularly close to the shearing plane and after permeability tests. The results show that the modifications of fabric are progressive and occur before their transition to the frozen stage and in the negative temperature range. Aggregates of fabric created by ice lensing are generally stable. A very significant increase of the permeability was observed after freezing and thawing. In this study, the magnitude of changes measured was in the range between two and three orders the original value. The shear strength parameters of unfrozen samples and frozen close to the freezing front do not vary significantly. 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CZURDA (Kurt A.); WAGNER (Jean-Frank)</AU><AF>Department of Applied Geology, Karlsruhe University/7500 Karlsruhe/Allemagne (1 aut.); Department of Applied Geology, University of Karlsruhe, Kaiserstr. 12/76128 Karlsruhe/Allemagne (1 aut.); Geology Department, Faculty VI, University of Trier, Behringstrasse/54286 Trier/Allemagne (2 aut.)</AF><DT>Publication en série; Niveau analytique</DT><SO>Applied clay science; ISSN 0169-1317; Coden ACLSER; Pays-Bas; Da. 2002; Vol. 21; No. 1-2; Pp. 77-87; Bibl. 19 ref.</SO><LA>Anglais</LA><EA>The thermodynamic conditions within frozen ground at temperatures just below 0 °C cause continuing translocation of water, ice and the displacement of mineral skeleton. The consideration of a wide range of micro-fabric transformations after freezing provides useful clues to the understanding the mechanism of void channel formation, which leads to increased permeability and changes in the shear resistance of soils. Microstructure observations, frost heave, water intake, permeability and shear strength measurements revealed the dynamic nature of cryogenic alterations. This paper deals with the effects of freeze-thaw on microstructure of clayey soils and soil-bentonite mixtures in relation to changes of the permeability and the shear strength. The SEM analysis was employed to study directly cryogenic alterations within clayey soils particularly close to the shearing plane and after permeability tests. The results show that the modifications of fabric are progressive and occur before their transition to the frozen stage and in the negative temperature range. Aggregates of fabric created by ice lensing are generally stable. A very significant increase of the permeability was observed after freezing and thawing. In this study, the magnitude of changes measured was in the range between two and three orders the original value. The shear strength parameters of unfrozen samples and frozen close to the freezing front do not vary significantly. The temperature effects on the shear strength are mainly reflected in cohesion.</EA><CC>226B01; 001E01O01</CC><FD>Argile; Sol gelé; Thermodynamique; Température; Glace; Déplacement; Fabrique; Transformation; Congélation; Mécanisme; Microscopie électronique; Donnée MEB; Perméabilité; Microstructure; Microfabrique; Résistance cisaillement; Dynamique; Altération</FD><FG>Roche clastique; Roche sédimentaire; Sol</FG><ED>clay; frozen ground; thermodynamics; temperature; ice; displacements; fabric; transformations; freezing; mechanism; electron microscopy; SEM data; permeability; microstructures; shear strength; dynamics; alteration</ED><EG>clastic rocks; sedimentary rocks; soils</EG><SD>Arcilla; Suelo helado; Termodinámica; Temperatura; Hielo; Fábrica; Transformación; Congelación; Microscopía electrónica; Dato MEB; Permeabilidad; Microestructura; Resistencia cizallamiento; Dinámica; Alteración</SD><LO>INIST-20859.354000100846800080</LO><ID>02-0235886</ID></server></inist></record>Pour manipuler ce document sous Unix (Dilib)
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