New challenges in experimental unsaturated soil mechanics. Experimental upscaling of an engineered gas-permeable seal
An example of upscaling phenomena with experimental techniques is presented and discussed within an engineered seal concept for a future deep geological repository for low and intermediate radioactive waste mainly produced by the energy/medicine/industry sectors. The seal will undergo a longterm sat...
| Autores: | , , |
|---|---|
| Tipo de documento: | artigo |
| Data de publicação: | 2023 |
| País: | España |
| Recursos: | Universitat Politècnica de Catalunya (UPC) |
| Repositório: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglês |
| OAI Identifier: | oai:upcommons.upc.edu:2117/404511 |
| Acesso em linha: | https://hdl.handle.net/2117/404511 https://dx.doi.org/10.1051/e3sconf/202338205001 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Soil mechanics Unsaturated soils Experimental investigation Gas -- Transportation Mecànica dels sòls Gas -- Transport Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls |
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New challenges in experimental unsaturated soil mechanics. Experimental upscaling of an engineered gas-permeable sealRomero Morales, Enrique Edgar|||0000-0002-4105-8941Lloret Morancho, Antonio|||0000-0001-7991-8487Alvarado Díaz, Clara ElenaSoil mechanicsUnsaturated soilsExperimental investigationGas -- TransportationMecànica dels sòlsGas -- TransportÀrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòlsAn example of upscaling phenomena with experimental techniques is presented and discussed within an engineered seal concept for a future deep geological repository for low and intermediate radioactive waste mainly produced by the energy/medicine/industry sectors. The seal will undergo a longterm saturation stage and subsequent gas transport through such a barrier. Consequently, gas entrapment and generation processes (dominated by the degradation of organic substances and metals) are expected to occur in the emplacement caverns along the pollutant waste storage. The case concerns a compacted 80/20 (dry mass) sand/bentonite S/B mixture with a complex microstructure that significantly evolves on hydration affecting the gas transport properties. This type of seal limits the gas pressure by increasing its gas transport capacity (gas-permeable seal). The large-scale and demonstration experiment GAST (Nagra’s GTS, Switzerland) focuses on the S/B response to saturation and the gas transport capacity in the later gas invasion phase. A series of laboratory experiments running parallel to the in situ test and bridging different scales (from bentonite inter-sand filling microstructural tests and point tests to dm-scale mock-ups) are discussed within the saturation, gas breakthrough pressure and gas dissipation process of the gas-permeable seal context.The authors acknowledge the financial support of ‘National Cooperative for the Disposal of Radioactive Waste’ Nagra (Switzerland) through a competitive research project (GAST – Laboratory investigation of two-phase transport in sandbentonite mixtures, ref 18311, 2019-2022) with the ‘International Centre for Numerical Methods in Engineering’ CIMNE (Spain). Furthermore, the authors acknowledge the fruitful discussions with Prof. Eduardo Alonso, Prof. Sebastia Olivella, Dr Juliana Knobelsdorf, Dr Laura Gonzalez-Blanco, Dr Nuria Pinyol, Dr Bill Lanyon, Dr Thomas Spillmann, Dr Andreas Reinicke, and the technical design/construction of the two mock-up prototypes by MSc Mercedes Sondon. The help of Dr Arisleidy Mesa-Alcantara, MSc Luis Miguel Garcia and MSc Cesarina Quezada in the laboratory tests is greatly acknowledged.Peer ReviewedEDP Sciences20232023-01-0120242024-03-14journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/404511https://dx.doi.org/10.1051/e3sconf/202338205001reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/4045112026-05-27T15:37:01Z |
| dc.title.none.fl_str_mv |
New challenges in experimental unsaturated soil mechanics. Experimental upscaling of an engineered gas-permeable seal |
| title |
New challenges in experimental unsaturated soil mechanics. Experimental upscaling of an engineered gas-permeable seal |
| spellingShingle |
New challenges in experimental unsaturated soil mechanics. Experimental upscaling of an engineered gas-permeable seal Romero Morales, Enrique Edgar|||0000-0002-4105-8941 Soil mechanics Unsaturated soils Experimental investigation Gas -- Transportation Mecànica dels sòls Gas -- Transport Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls |
| title_short |
New challenges in experimental unsaturated soil mechanics. Experimental upscaling of an engineered gas-permeable seal |
| title_full |
New challenges in experimental unsaturated soil mechanics. Experimental upscaling of an engineered gas-permeable seal |
| title_fullStr |
New challenges in experimental unsaturated soil mechanics. Experimental upscaling of an engineered gas-permeable seal |
| title_full_unstemmed |
New challenges in experimental unsaturated soil mechanics. Experimental upscaling of an engineered gas-permeable seal |
| title_sort |
New challenges in experimental unsaturated soil mechanics. Experimental upscaling of an engineered gas-permeable seal |
| dc.creator.none.fl_str_mv |
Romero Morales, Enrique Edgar|||0000-0002-4105-8941 Lloret Morancho, Antonio|||0000-0001-7991-8487 Alvarado Díaz, Clara Elena |
| author |
Romero Morales, Enrique Edgar|||0000-0002-4105-8941 |
| author_facet |
Romero Morales, Enrique Edgar|||0000-0002-4105-8941 Lloret Morancho, Antonio|||0000-0001-7991-8487 Alvarado Díaz, Clara Elena |
| author_role |
author |
| author2 |
Lloret Morancho, Antonio|||0000-0001-7991-8487 Alvarado Díaz, Clara Elena |
| author2_role |
author author |
| dc.subject.none.fl_str_mv |
Soil mechanics Unsaturated soils Experimental investigation Gas -- Transportation Mecànica dels sòls Gas -- Transport Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls |
| topic |
Soil mechanics Unsaturated soils Experimental investigation Gas -- Transportation Mecànica dels sòls Gas -- Transport Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls |
| description |
An example of upscaling phenomena with experimental techniques is presented and discussed within an engineered seal concept for a future deep geological repository for low and intermediate radioactive waste mainly produced by the energy/medicine/industry sectors. The seal will undergo a longterm saturation stage and subsequent gas transport through such a barrier. Consequently, gas entrapment and generation processes (dominated by the degradation of organic substances and metals) are expected to occur in the emplacement caverns along the pollutant waste storage. The case concerns a compacted 80/20 (dry mass) sand/bentonite S/B mixture with a complex microstructure that significantly evolves on hydration affecting the gas transport properties. This type of seal limits the gas pressure by increasing its gas transport capacity (gas-permeable seal). The large-scale and demonstration experiment GAST (Nagra’s GTS, Switzerland) focuses on the S/B response to saturation and the gas transport capacity in the later gas invasion phase. A series of laboratory experiments running parallel to the in situ test and bridging different scales (from bentonite inter-sand filling microstructural tests and point tests to dm-scale mock-ups) are discussed within the saturation, gas breakthrough pressure and gas dissipation process of the gas-permeable seal context. |
| publishDate |
2023 |
| dc.date.none.fl_str_mv |
2023 2023-01-01 2024 2024-03-14 |
| dc.type.none.fl_str_mv |
journal article http://purl.org/coar/resource_type/c_6501 VoR http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2117/404511 https://dx.doi.org/10.1051/e3sconf/202338205001 |
| url |
https://hdl.handle.net/2117/404511 https://dx.doi.org/10.1051/e3sconf/202338205001 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.rights.none.fl_str_mv |
open access http://purl.org/coar/access_right/c_abf2 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
| dc.rights.openaire.fl_str_mv |
info:eu-repo/semantics/openAccess |
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open access http://purl.org/coar/access_right/c_abf2 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
application/pdf |
| dc.publisher.none.fl_str_mv |
EDP Sciences |
| publisher.none.fl_str_mv |
EDP Sciences |
| dc.source.none.fl_str_mv |
reponame:UPCommons. Portal del coneixement obert de la UPC instname:Universitat Politècnica de Catalunya (UPC) |
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Universitat Politècnica de Catalunya (UPC) |
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UPCommons. Portal del coneixement obert de la UPC |
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UPCommons. Portal del coneixement obert de la UPC |
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