Modelling coupled behaviour of a clay barrier at high temperatures

M. Sanchez, A. Gens, L.D.N. Guimarães, S. Olivella, W. Xu (Editor), X. Tan (Editor), S. Yang (Editor)

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The design of repositories for the isolation of radioactive waste generally contemplates the use of expansive clays as a buffer material. In field conditions the clay barrier will be hydrated under confined conditions and will also undergo processes of heating, up to maximum of 100 ° C ( this is according to the Spanish concept for the isolation of high level radioactive waste). Based on experimental data, models have been developed to explain and reproduce the observed thermo-hydro-mechanical (THM) behaviour of expansive clays. However, unplanned overheating in a large scale test has provided the opportunity to analyze the clay barrier under conditions quite different from the design ones. A THM formulation and constitutive model have been used to describe and reproduce the main aspects of the observed response of the clay barrier. The analysis provides a unique opportunity to test our current understanding of compacted expansive clay behaviour at temperatures not previously reached.
LanguageEnglish
Title of host publicationGeoProc 2006: Advances on coupled thermo-hydro-mechanical-chemical processes in geosystems and engineering
Place of PublicationBeijing
Pages75-80
Number of pages5
Publication statusPublished - 2006

Fingerprint

clays
radioactive wastes
isolation
buffers
formulations
heating
temperature

Keywords

  • thermo-hydro-mechanical
  • radioactive waste
  • clay barrier
  • temperature
  • expansive clay
  • buffer

Cite this

Sanchez, M., Gens, A., Guimarães, L. D. N., Olivella, S., Xu, W. (Ed.), Tan, X. (Ed.), & Yang, S. (Ed.) (2006). Modelling coupled behaviour of a clay barrier at high temperatures. In GeoProc 2006: Advances on coupled thermo-hydro-mechanical-chemical processes in geosystems and engineering (pp. 75-80). Beijing.
Sanchez, M. ; Gens, A. ; Guimarães, L.D.N. ; Olivella, S. ; Xu, W. (Editor) ; Tan, X. (Editor) ; Yang, S. (Editor). / Modelling coupled behaviour of a clay barrier at high temperatures. GeoProc 2006: Advances on coupled thermo-hydro-mechanical-chemical processes in geosystems and engineering. Beijing, 2006. pp. 75-80
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abstract = "The design of repositories for the isolation of radioactive waste generally contemplates the use of expansive clays as a buffer material. In field conditions the clay barrier will be hydrated under confined conditions and will also undergo processes of heating, up to maximum of 100 ° C ( this is according to the Spanish concept for the isolation of high level radioactive waste). Based on experimental data, models have been developed to explain and reproduce the observed thermo-hydro-mechanical (THM) behaviour of expansive clays. However, unplanned overheating in a large scale test has provided the opportunity to analyze the clay barrier under conditions quite different from the design ones. A THM formulation and constitutive model have been used to describe and reproduce the main aspects of the observed response of the clay barrier. The analysis provides a unique opportunity to test our current understanding of compacted expansive clay behaviour at temperatures not previously reached.",
keywords = "thermo-hydro-mechanical, radioactive waste, clay barrier, temperature, expansive clay, buffer",
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Sanchez, M, Gens, A, Guimarães, LDN, Olivella, S, Xu, W (ed.), Tan, X (ed.) & Yang, S (ed.) 2006, Modelling coupled behaviour of a clay barrier at high temperatures. in GeoProc 2006: Advances on coupled thermo-hydro-mechanical-chemical processes in geosystems and engineering. Beijing, pp. 75-80.

Modelling coupled behaviour of a clay barrier at high temperatures. / Sanchez, M.; Gens, A.; Guimarães, L.D.N.; Olivella, S.; Xu, W. (Editor); Tan, X. (Editor); Yang, S. (Editor).

GeoProc 2006: Advances on coupled thermo-hydro-mechanical-chemical processes in geosystems and engineering. Beijing, 2006. p. 75-80.

Research output: Chapter in Book/Report/Conference proceedingChapter

TY - CHAP

T1 - Modelling coupled behaviour of a clay barrier at high temperatures

AU - Sanchez, M.

AU - Gens, A.

AU - Guimarães, L.D.N.

AU - Olivella, S.

A2 - Xu, W.

A2 - Tan, X.

A2 - Yang, S.

PY - 2006

Y1 - 2006

N2 - The design of repositories for the isolation of radioactive waste generally contemplates the use of expansive clays as a buffer material. In field conditions the clay barrier will be hydrated under confined conditions and will also undergo processes of heating, up to maximum of 100 ° C ( this is according to the Spanish concept for the isolation of high level radioactive waste). Based on experimental data, models have been developed to explain and reproduce the observed thermo-hydro-mechanical (THM) behaviour of expansive clays. However, unplanned overheating in a large scale test has provided the opportunity to analyze the clay barrier under conditions quite different from the design ones. A THM formulation and constitutive model have been used to describe and reproduce the main aspects of the observed response of the clay barrier. The analysis provides a unique opportunity to test our current understanding of compacted expansive clay behaviour at temperatures not previously reached.

AB - The design of repositories for the isolation of radioactive waste generally contemplates the use of expansive clays as a buffer material. In field conditions the clay barrier will be hydrated under confined conditions and will also undergo processes of heating, up to maximum of 100 ° C ( this is according to the Spanish concept for the isolation of high level radioactive waste). Based on experimental data, models have been developed to explain and reproduce the observed thermo-hydro-mechanical (THM) behaviour of expansive clays. However, unplanned overheating in a large scale test has provided the opportunity to analyze the clay barrier under conditions quite different from the design ones. A THM formulation and constitutive model have been used to describe and reproduce the main aspects of the observed response of the clay barrier. The analysis provides a unique opportunity to test our current understanding of compacted expansive clay behaviour at temperatures not previously reached.

KW - thermo-hydro-mechanical

KW - radioactive waste

KW - clay barrier

KW - temperature

KW - expansive clay

KW - buffer

M3 - Chapter

SN - 9787030187505

SP - 75

EP - 80

BT - GeoProc 2006: Advances on coupled thermo-hydro-mechanical-chemical processes in geosystems and engineering

CY - Beijing

ER -

Sanchez M, Gens A, Guimarães LDN, Olivella S, Xu W, (ed.), Tan X, (ed.) et al. Modelling coupled behaviour of a clay barrier at high temperatures. In GeoProc 2006: Advances on coupled thermo-hydro-mechanical-chemical processes in geosystems and engineering. Beijing. 2006. p. 75-80