Investigating the Swelling Pressure of Compacted Crushed-Callovo-Oxfordian Claystone - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physics and Chemistry of The Earth Année : 2011

Investigating the Swelling Pressure of Compacted Crushed-Callovo-Oxfordian Claystone

(1) , (2) , (2) , (2) , (3) , (4)
1
2
3
4
Chaosheng Tang
  • Fonction : Auteur
  • PersonId : 911655
Anh Minh A.M. Tang
Yu-Jun Cui
  • Fonction : Auteur correspondant
  • PersonId : 2792
  • IdHAL : yu-jun-cui

Connectez-vous pour contacter l'auteur
Pierre Delage
Christian Schroeder
  • Fonction : Auteur
Emmanuel de Laure
  • Fonction : Auteur
  • PersonId : 846050

Résumé

This paper presents an experimental study on the swelling pressure of heavily compacted crushed Callovo-Oxfordian (Cox) claystone at a dry unit mass d = 2.0 Mg/m3 using four different methods: constant-volume, swell-reload, zero-swell and adjusted constant-volume method. Results show that the swelling pressure varies in the range of 1-5 MPa and depends significantly on the test method. From the constant-volume tests, it is observed that the swelling behaviour during wetting is a function of the suction and depends on both the hydration paths and wetting conditions (e.g. vapour-wetting or liquid-wetting). The swelling pressure decreases significantly with saturation time. To identify the microstructure changes of specimens before and after wetting, mercury intrusion porosimetry (MIP) and scanning electron microscopy (SEM) tests were performed. It is observed that, after wetting, the large inter-aggregate pores observed in the as-compacted specimen are no longer apparent; the whole pattern is characterized by a general swell of hydrated clay particles, rendering the soil more homogeneous. Results from MIP indicated that wetting caused a significant reduction of the entrance diameter of the dominant inter-aggregate pores from 2.1 to 0.5 m whereas intra-aggregate pores were not significantly influenced.
Fichier principal
Vignette du fichier
Tang_et_al-JPCE2011_HAL.pdf (1.61 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00655750 , version 1 (02-01-2012)

Identifiants

Citer

Chaosheng Tang, Anh Minh A.M. Tang, Yu-Jun Cui, Pierre Delage, Christian Schroeder, et al.. Investigating the Swelling Pressure of Compacted Crushed-Callovo-Oxfordian Claystone. Physics and Chemistry of The Earth, 2011, 36 (17-18), pp.1857-1866. ⟨10.1016/j.pce.2011.10.001⟩. ⟨hal-00655750⟩
229 Consultations
1413 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More