Abstract
| Original language | English |
|---|---|
| Title of host publication | GeoProc 2006: Advances on coupled thermo-hydro-mechanical-chemical processes in geosystems and engineering |
| Place of Publication | Beijing |
| Pages | 75-80 |
| Number of pages | 5 |
| Publication status | Published - 2006 |
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Keywords
- thermo-hydro-mechanical
- radioactive waste
- clay barrier
- temperature
- expansive clay
- buffer
Cite this
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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 proceeding › Chapter
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 -