Compressibility and swelling of an overconsolidated highly plastic Paleogene clay

Research output: Contribution to conferencePaperResearchpeer-review

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Abstract

High plasticity clays of Paleogene origin are frequently met in northern Europe, typically overconsolidated as a result of overburden pressure during the ice age. Moreover, the advancing and melting of the glaciers has affected their macro-structure, and clays are found pre sheared in some zones, while deeper layers are intact. Compressibility and swelling dominate the mechanical behavior, with con-siderable impacts in the design of modern infrastructure. This study focuses on the Paleogene Røsnæs Clay found between southern Denmark and northern Germany, which is characterized by high plasticity attributed to the smectite mineral content (20 – 50 %). Incremental loading one-dimensional compression tests were carried out on undisturbed Folded and Intact Røsnæs Clay using different salinity levels of the water in the oedometric cell and comparing the behavior with that of reconstituted samples having similar mineralogical composition to assess the influence of structure. Furthermore, the stress dependency of stiffness and creep rate was analyzed during unloading-reloading cycles achieving progressively higher stress levels.
Original languageEnglish
Publication date2018
Number of pages9
Publication statusPublished - 2018
Eventmicro to MACRO Mathematical Modelling in Soil Mechanics 2018 - University Mediterranea of Reggio Calabria, Reggio Calabria, Italy
Duration: 29 May 20181 Jun 2018

Conference

Conferencemicro to MACRO Mathematical Modelling in Soil Mechanics 2018
LocationUniversity Mediterranea of Reggio Calabria
CountryItaly
CityReggio Calabria
Period29/05/201801/06/2018

Keywords

  • Swelling sensitivity
  • Pore water composition
  • Salinity
  • Deionized water
  • High plasticity clay
  • Secondary compression index

Cite this

Rocchi, I., Di Remigio, G., Grønbech, G. L., & Zania, V. (2018). Compressibility and swelling of an overconsolidated highly plastic Paleogene clay. Paper presented at micro to MACRO Mathematical Modelling in Soil Mechanics 2018, Reggio Calabria, Italy.
Rocchi, Irene ; Di Remigio, Giorgia ; Grønbech, Gitte Lyng ; Zania, Varvara. / Compressibility and swelling of an overconsolidated highly plastic Paleogene clay. Paper presented at micro to MACRO Mathematical Modelling in Soil Mechanics 2018, Reggio Calabria, Italy.9 p.
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title = "Compressibility and swelling of an overconsolidated highly plastic Paleogene clay",
abstract = "High plasticity clays of Paleogene origin are frequently met in northern Europe, typically overconsolidated as a result of overburden pressure during the ice age. Moreover, the advancing and melting of the glaciers has affected their macro-structure, and clays are found pre sheared in some zones, while deeper layers are intact. Compressibility and swelling dominate the mechanical behavior, with con-siderable impacts in the design of modern infrastructure. This study focuses on the Paleogene R{\o}sn{\ae}s Clay found between southern Denmark and northern Germany, which is characterized by high plasticity attributed to the smectite mineral content (20 – 50 {\%}). Incremental loading one-dimensional compression tests were carried out on undisturbed Folded and Intact R{\o}sn{\ae}s Clay using different salinity levels of the water in the oedometric cell and comparing the behavior with that of reconstituted samples having similar mineralogical composition to assess the influence of structure. Furthermore, the stress dependency of stiffness and creep rate was analyzed during unloading-reloading cycles achieving progressively higher stress levels.",
keywords = "Swelling sensitivity, Pore water composition, Salinity, Deionized water, High plasticity clay, Secondary compression index",
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Rocchi, I, Di Remigio, G, Grønbech, GL & Zania, V 2018, 'Compressibility and swelling of an overconsolidated highly plastic Paleogene clay' Paper presented at micro to MACRO Mathematical Modelling in Soil Mechanics 2018, Reggio Calabria, Italy, 29/05/2018 - 01/06/2018, .

Compressibility and swelling of an overconsolidated highly plastic Paleogene clay. / Rocchi, Irene; Di Remigio, Giorgia; Grønbech, Gitte Lyng; Zania, Varvara.

2018. Paper presented at micro to MACRO Mathematical Modelling in Soil Mechanics 2018, Reggio Calabria, Italy.

Research output: Contribution to conferencePaperResearchpeer-review

TY - CONF

T1 - Compressibility and swelling of an overconsolidated highly plastic Paleogene clay

AU - Rocchi, Irene

AU - Di Remigio, Giorgia

AU - Grønbech, Gitte Lyng

AU - Zania, Varvara

PY - 2018

Y1 - 2018

N2 - High plasticity clays of Paleogene origin are frequently met in northern Europe, typically overconsolidated as a result of overburden pressure during the ice age. Moreover, the advancing and melting of the glaciers has affected their macro-structure, and clays are found pre sheared in some zones, while deeper layers are intact. Compressibility and swelling dominate the mechanical behavior, with con-siderable impacts in the design of modern infrastructure. This study focuses on the Paleogene Røsnæs Clay found between southern Denmark and northern Germany, which is characterized by high plasticity attributed to the smectite mineral content (20 – 50 %). Incremental loading one-dimensional compression tests were carried out on undisturbed Folded and Intact Røsnæs Clay using different salinity levels of the water in the oedometric cell and comparing the behavior with that of reconstituted samples having similar mineralogical composition to assess the influence of structure. Furthermore, the stress dependency of stiffness and creep rate was analyzed during unloading-reloading cycles achieving progressively higher stress levels.

AB - High plasticity clays of Paleogene origin are frequently met in northern Europe, typically overconsolidated as a result of overburden pressure during the ice age. Moreover, the advancing and melting of the glaciers has affected their macro-structure, and clays are found pre sheared in some zones, while deeper layers are intact. Compressibility and swelling dominate the mechanical behavior, with con-siderable impacts in the design of modern infrastructure. This study focuses on the Paleogene Røsnæs Clay found between southern Denmark and northern Germany, which is characterized by high plasticity attributed to the smectite mineral content (20 – 50 %). Incremental loading one-dimensional compression tests were carried out on undisturbed Folded and Intact Røsnæs Clay using different salinity levels of the water in the oedometric cell and comparing the behavior with that of reconstituted samples having similar mineralogical composition to assess the influence of structure. Furthermore, the stress dependency of stiffness and creep rate was analyzed during unloading-reloading cycles achieving progressively higher stress levels.

KW - Swelling sensitivity

KW - Pore water composition

KW - Salinity

KW - Deionized water

KW - High plasticity clay

KW - Secondary compression index

M3 - Paper

ER -

Rocchi I, Di Remigio G, Grønbech GL, Zania V. Compressibility and swelling of an overconsolidated highly plastic Paleogene clay. 2018. Paper presented at micro to MACRO Mathematical Modelling in Soil Mechanics 2018, Reggio Calabria, Italy.