Experimental measurements and water transfer models for the drying of argillite

Cariou, Sophie; Skoczylas, Frédéric; Dormieux, Luc

doi:10.1016/j.ijrmms.2012.05.014

Cited by 12 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can also cause a loss of sealing properties of host rocks dedicated to nuclear waste storage once the underground cavities are excavated. Consequently, a large number of soils and rocks are also studied under drying conditions: kaolin clay (Ketelaars et al 1995), sandstone (Rousset-Tournier et al 2003), clayey formations (Musielak and Banaszak 2007;Cariou et al 2012) etc.…”

Section: Diversity Of Studied Materials Under Drying Conditionsmentioning

confidence: 99%

On Water Transfer and Hydraulic Connection Layer During the Convective Drying of Rigid Porous Material

et al. 2014

View full text Add to dashboard Cite

The convective drying of a natural porous material, limestone, is investigated in this study, with both experimental and numerical approaches. The first experimental campaign, which focuses on the influence of samples' slenderness, suggests the presence of a hydraulic connection layer between the porous water and the external environment, in spite of the very fine pore structure of the material. This hydraulic transfer enables the fast water evaporation at the beginning of the drying test, when external conditions drive the kinetics. Furthermore, the results show that this layer does not exceed 30 mm deep from the external surface, given the drying conditions of the test. A second experimental campaign aims to analyse, by mean of an X-ray tomography tool, the internal water content during the drying. It confirms that water transfer takes place within the limestone in two distinct stages. The first stage being faster than the second one with a homogeneous desaturation along the sample, it is consistent with the hypothesis of the hydraulic connection layer. Finally, the finite element modelling makes possible to identify the main mechanisms of water transfer, namely liquid convection and vapour diffusion. Keywords

show abstract

Section: Diversity Of Studied Materials Under Drying Conditionsmentioning

confidence: 99%

On Water Transfer and Hydraulic Connection Layer During the Convective Drying of Rigid Porous Material

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Several studies (ANDRA 2005(ANDRA , 2012Escoffier et al 2005;Pham 2006; Davy et al 2007;Distinguin & Lavanchy 2007;Boulin et al 2008;Zhang et al 2010;Skoczylas 2011;Cariou et al 2012;M'Jahad 2012) have been conducted by ANDRA and the scientific community to investigate the behaviour of COx argillite under varied thermal, hydric, mechanical and chemical conditions, corresponding to deep underground storage conditions, in terms of water retention properties (Pham 2006;Distinguin & Lavanchy 2007;Cariou et al 2012) and gas transport ability (Escoffier et al 2005;Davy et al 2007;Boulin et al 2008), as well as the possible coupling between water retention and gas permeability (Zhang et al 2010). However, very few studies have simultaneously investigated the pore-size distribution, water retention, and relative gas permeability and gas migration properties of damaged COx argillite that are afforded in this study.…”

mentioning

confidence: 99%

Characterization of transport and water retention properties of damaged Callovo-Oxfordian claystone

M’Jahad

Davy

Skoczylas

et al. 2016

Self Cite

View full text Add to dashboard Cite

International audienceIn the context of the underground storage of radioactive waste, the aim of this experimental study is to characterize the effect of damage on transport and water retention properties of Callovo-Oxfordian (COx) argillite. The originality of the study is to simultaneously investigate the pore-size distribution, water retention, the dry, effective and relative gas permeability, and the gas breakthrough pressure (GBP) of damaged COx argillite. These different properties are all relevant to characterizing the fluid transport ability of COx argillite.Results show that the damage has a significant impact on the properties of the COx argillite. It induces a decrease in its water retention capacity and GBP, and it increases its gas permeability and apparent porosity available to water owing to the creation of micro-cracks.Another objective is to show which of these properties is the most suitable to detect early damage states in COx argillite, with a potential use being to identify them in situ. GBP appears to be the best ‘detector’ of damage because of its sensitivity to damage even under high confinement pressures. Gas permeability could be a good indicator of damage, as it increases significantly (one or several orders of magnitude) after the damage. Finally, the water permeability curve is a poor indicator of COx argillite damage

show abstract

Modeling the Long‐term Stability of Multi‐barrier Systems for Nuclear Waste Disposal in Geological Clay Formations

Claret

Marty

Tournassat

2018

Reactive Transport Modeling

View full text Add to dashboard Cite

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

show abstract

Experimental measurements and water transfer models for the drying of argillite

Cited by 12 publications

References 25 publications

On Water Transfer and Hydraulic Connection Layer During the Convective Drying of Rigid Porous Material

On Water Transfer and Hydraulic Connection Layer During the Convective Drying of Rigid Porous Material

Characterization of transport and water retention properties of damaged Callovo-Oxfordian claystone

Modeling the Long‐term Stability of Multi‐barrier Systems for Nuclear Waste Disposal in Geological Clay Formations

Contact Info

Product

Resources

About