Microstructural interpretation of compression behaviour of Kaolin clay

Bruna Lopes, Alessandro Tarantino, Manoel Porfirio Cordão-Neto

Research output: Contribution to conferencePaper

Abstract

Clay is a very complex material. There is a conceptual lack in the understanding of clay behaviour from a microstructural standpoint. For example, fundamental features of compression behaviour, i.e. plastic and elastic response, are explained from a microstructural standpoint by either referring to granular ‘interactions’, which are evidently not appropriate for clay, or to electro-chemical interactions borrowed from colloidal theories, again not representative of clay behaviour. Hence, in practice there is no conceptual model able to describe the behaviour of clay.

It is clear that the clay structure has an important impact on the clay behaviour; however this topic has only been widely studied for unsaturated soils, where conclusions about the influence of the clay structure can be hidden by the effects of suction.

The paper presents a microstructural study of Kaolin Clay subjected to one-dimensional compression. Microstructure was investigated via the Pore Size Distributions. Reconstituted samples were tested in order to generate different microstructures and have a better understanding of the role of clay microstructure in clay mechanical behaviour.
Original languageEnglish
Publication statusPublished - 2015
EventXVI European Conference on Soil Mechanics and Geotechnical Engineering - Edinburgh, United Kingdom
Duration: 13 Sep 201517 Sep 2015

Conference

ConferenceXVI European Conference on Soil Mechanics and Geotechnical Engineering
CountryUnited Kingdom
CityEdinburgh
Period13/09/1517/09/15

Fingerprint

Kaolin
Clay
Microstructure
Pore size
Compaction
Plastics
Soils

Keywords

  • Kaolin clay
  • microstructural study
  • clay structure
  • one-dimensional compression
  • mechanical behaviour

Cite this

Lopes, B., Tarantino, A., & Porfirio Cordão-Neto , M. (2015). Microstructural interpretation of compression behaviour of Kaolin clay. Paper presented at XVI European Conference on Soil Mechanics and Geotechnical Engineering, Edinburgh, United Kingdom.
Lopes, Bruna ; Tarantino, Alessandro ; Porfirio Cordão-Neto , Manoel. / Microstructural interpretation of compression behaviour of Kaolin clay. Paper presented at XVI European Conference on Soil Mechanics and Geotechnical Engineering, Edinburgh, United Kingdom.
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Lopes, B, Tarantino, A & Porfirio Cordão-Neto , M 2015, 'Microstructural interpretation of compression behaviour of Kaolin clay' Paper presented at XVI European Conference on Soil Mechanics and Geotechnical Engineering, Edinburgh, United Kingdom, 13/09/15 - 17/09/15, .

Microstructural interpretation of compression behaviour of Kaolin clay. / Lopes, Bruna; Tarantino, Alessandro; Porfirio Cordão-Neto , Manoel.

2015. Paper presented at XVI European Conference on Soil Mechanics and Geotechnical Engineering, Edinburgh, United Kingdom.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Microstructural interpretation of compression behaviour of Kaolin clay

AU - Lopes, Bruna

AU - Tarantino, Alessandro

AU - Porfirio Cordão-Neto , Manoel

PY - 2015

Y1 - 2015

N2 - Clay is a very complex material. There is a conceptual lack in the understanding of clay behaviour from a microstructural standpoint. For example, fundamental features of compression behaviour, i.e. plastic and elastic response, are explained from a microstructural standpoint by either referring to granular ‘interactions’, which are evidently not appropriate for clay, or to electro-chemical interactions borrowed from colloidal theories, again not representative of clay behaviour. Hence, in practice there is no conceptual model able to describe the behaviour of clay.It is clear that the clay structure has an important impact on the clay behaviour; however this topic has only been widely studied for unsaturated soils, where conclusions about the influence of the clay structure can be hidden by the effects of suction.The paper presents a microstructural study of Kaolin Clay subjected to one-dimensional compression. Microstructure was investigated via the Pore Size Distributions. Reconstituted samples were tested in order to generate different microstructures and have a better understanding of the role of clay microstructure in clay mechanical behaviour.

AB - Clay is a very complex material. There is a conceptual lack in the understanding of clay behaviour from a microstructural standpoint. For example, fundamental features of compression behaviour, i.e. plastic and elastic response, are explained from a microstructural standpoint by either referring to granular ‘interactions’, which are evidently not appropriate for clay, or to electro-chemical interactions borrowed from colloidal theories, again not representative of clay behaviour. Hence, in practice there is no conceptual model able to describe the behaviour of clay.It is clear that the clay structure has an important impact on the clay behaviour; however this topic has only been widely studied for unsaturated soils, where conclusions about the influence of the clay structure can be hidden by the effects of suction.The paper presents a microstructural study of Kaolin Clay subjected to one-dimensional compression. Microstructure was investigated via the Pore Size Distributions. Reconstituted samples were tested in order to generate different microstructures and have a better understanding of the role of clay microstructure in clay mechanical behaviour.

KW - Kaolin clay

KW - microstructural study

KW - clay structure

KW - one-dimensional compression

KW - mechanical behaviour

M3 - Paper

ER -

Lopes B, Tarantino A, Porfirio Cordão-Neto M. Microstructural interpretation of compression behaviour of Kaolin clay. 2015. Paper presented at XVI European Conference on Soil Mechanics and Geotechnical Engineering, Edinburgh, United Kingdom.