On the inclusion of high temperature effects in the behaviour of buffer material

Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

Authors

Institutes & Expert groups

Documents & links

Abstract

Bentonite is considered as the sealing/buffer material in the European Nuclear waste disposal concept due to its high swelling capacity. Therefore, the accurate prediction of the behaviour of the buffer material is crucial for the performance assessment. Consequently the modelling of the thermo-hydraulic behaviour of the buffer material is significant. This paper presents a study of thermo-hydraulic behaviour of a highly compacted bentonite subjected to an elevated thermal load and a hydraulic gradient. This is achieved via the application of a numerical model, COMPASS, which implements a coupled thermo/hydro/mechanical approach to model the behaviour of bentonite subjected to a higher temperature. The experimental work considered for the numerical simulation is a thermo-hydraulic experiment conducted on MX-80 bentonite at a temperature of 85°C in the laboratory of Cardiff University. The model is employed to solve a series of transient problems ranging from 1 day to 30 days and numerical results compared against thermal and hydraulic results from experiment. RÉSUMÉ La bentonite

Details

Original languageEnglish
Title of host publicationProceedings of the 62nd Canadian Geotechnical Conference and 10th Joint CGS/IAH-CNC Groundwater conference, GeoHalifax2009
Place of PublicationHalifax, Nova Scotia, Canada
Pages641-645
Volume1
Publication statusPublished - Sep 2009
Event62nd Canadian Geotechnical Conference and 10th Joint CGS/IAH-CNC Groundwater conference, GeoHalifax2009 - The Canadian Geotechnical Society (CGS), the Nova Scotia Section of the Canadian Geotechnical Society and the Canadian National Chapter of the International Association of Hydrogeologists (IAH-CNC), Halifax, Nova Scotia, Canada
Duration: 20 Sep 200924 Sep 2009

Conference

Conference62nd Canadian Geotechnical Conference and 10th Joint CGS/IAH-CNC Groundwater conference, GeoHalifax2009
CountryCanada
CityHalifax, Nova Scotia
Period2009-09-202009-09-24

Keywords

  • High temperature, Bentonite buffer, THM model

ID: 67591