Modelling the swelling of a bentonite pellet using a triple porosity model

In this work, the scope of a macroscopic triple porosity (mega-, macro- and micro-porosity) model is assessed by analysing its application in simulating the hydration and free swelling of single bentonite pellets. Flow is assumed to be concentrated in the megapores existing between the bentonite gra...

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Detalhes bibliográficos
Autores: Navarro Gamir, Vicente, Tengblad García, Erik anders, Torres Serra, Joel, Asensio Sánchez, Laura
Formato: artículo
Fecha de publicación:2025
País:España
Recursos:Universidad de Castilla-La Mancha
Repositorio:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/46798
Acesso em linha:https://doi.org/10.1016/j.enggeo.2025.108395
https://hdl.handle.net/10578/46798
Access Level:acceso abierto
Palavra-chave:Bentonite pellet
Macroscopic approach
Megaporosity flow
Megaporosity rearrangement
Triple porosity model
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spelling Modelling the swelling of a bentonite pellet using a triple porosity modelNavarro Gamir, VicenteTengblad García, Erik andersTorres Serra, JoelAsensio Sánchez, LauraBentonite pelletMacroscopic approachMegaporosity flowMegaporosity rearrangementTriple porosity modelIn this work, the scope of a macroscopic triple porosity (mega-, macro- and micro-porosity) model is assessed by analysing its application in simulating the hydration and free swelling of single bentonite pellets. Flow is assumed to be concentrated in the megapores existing between the bentonite grains. Therefore, its application to the analysis of single pellets is very demanding, as the volume of these megapores is initially very small. However, the good results show the consistency of the formulation used to describe the flow, as this formulation accurately reproduces the hydration of the pellets. Swelling is also satisfactorily reproduced with a new mechanical formulation that addresses the rearrangement in megaporosity that the microstructure can cause under conditions of reduced confinement. Furthermore, this new formulation enables the model to provide a macroscopic description of the evolution of megapores that is consistent with results obtained through microscopic experimental techniques when analysing the cracking process experienced by the pellets. This result is especially notable because not only has it not been obtained previously by other macroscopic models, but it also provides significant confidence in the new proposed mechanical formulation, which retains simplicity by introducing a single additional parameter.Elsevier202620262025info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://doi.org/10.1016/j.enggeo.2025.108395https://hdl.handle.net/10578/46798reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésPID2022-141429OB-I00info:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/467982026-05-27T07:36:41Z
dc.title.none.fl_str_mv Modelling the swelling of a bentonite pellet using a triple porosity model
title Modelling the swelling of a bentonite pellet using a triple porosity model
spellingShingle Modelling the swelling of a bentonite pellet using a triple porosity model
Navarro Gamir, Vicente
Bentonite pellet
Macroscopic approach
Megaporosity flow
Megaporosity rearrangement
Triple porosity model
title_short Modelling the swelling of a bentonite pellet using a triple porosity model
title_full Modelling the swelling of a bentonite pellet using a triple porosity model
title_fullStr Modelling the swelling of a bentonite pellet using a triple porosity model
title_full_unstemmed Modelling the swelling of a bentonite pellet using a triple porosity model
title_sort Modelling the swelling of a bentonite pellet using a triple porosity model
dc.creator.none.fl_str_mv Navarro Gamir, Vicente
Tengblad García, Erik anders
Torres Serra, Joel
Asensio Sánchez, Laura
author Navarro Gamir, Vicente
author_facet Navarro Gamir, Vicente
Tengblad García, Erik anders
Torres Serra, Joel
Asensio Sánchez, Laura
author_role author
author2 Tengblad García, Erik anders
Torres Serra, Joel
Asensio Sánchez, Laura
author2_role author
author
author
dc.subject.none.fl_str_mv Bentonite pellet
Macroscopic approach
Megaporosity flow
Megaporosity rearrangement
Triple porosity model
topic Bentonite pellet
Macroscopic approach
Megaporosity flow
Megaporosity rearrangement
Triple porosity model
description In this work, the scope of a macroscopic triple porosity (mega-, macro- and micro-porosity) model is assessed by analysing its application in simulating the hydration and free swelling of single bentonite pellets. Flow is assumed to be concentrated in the megapores existing between the bentonite grains. Therefore, its application to the analysis of single pellets is very demanding, as the volume of these megapores is initially very small. However, the good results show the consistency of the formulation used to describe the flow, as this formulation accurately reproduces the hydration of the pellets. Swelling is also satisfactorily reproduced with a new mechanical formulation that addresses the rearrangement in megaporosity that the microstructure can cause under conditions of reduced confinement. Furthermore, this new formulation enables the model to provide a macroscopic description of the evolution of megapores that is consistent with results obtained through microscopic experimental techniques when analysing the cracking process experienced by the pellets. This result is especially notable because not only has it not been obtained previously by other macroscopic models, but it also provides significant confidence in the new proposed mechanical formulation, which retains simplicity by introducing a single additional parameter.
publishDate 2025
dc.date.none.fl_str_mv 2025
2026
2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://doi.org/10.1016/j.enggeo.2025.108395
https://hdl.handle.net/10578/46798
url https://doi.org/10.1016/j.enggeo.2025.108395
https://hdl.handle.net/10578/46798
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv PID2022-141429OB-I00
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RUIdeRA. Repositorio Institucional de la UCLM
instname:Universidad de Castilla-La Mancha
instname_str Universidad de Castilla-La Mancha
reponame_str RUIdeRA. Repositorio Institucional de la UCLM
collection RUIdeRA. Repositorio Institucional de la UCLM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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