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Paper   IPM / CMNL / 16881
Condensed Matter National Laboratory
  Title:   Decompaction of wet granular materials under freeze-thaw cycling
1.  Maryam Pakpour
2.  Nicolas Vandewalle
3.  Geoffroy Lumay
  Status:   Published
  Journal: Phys. Rev. E
  No.:  012901
  Vol.:  99
  Year:  2019
  Supported by:  IPM
The packing fraction dynamics of a wet granular material submitted to freeze-thaw cycling is investigated experimentally. The dynamics is strongly influenced by the liquid volume fraction? in the considered range of 0.03< ?< 0.32. This range of liquid contents covers different regimes of wetness from the creation of the capillary network until the formation of large clusters and finally close to the saturated case. For the liquid contents ?? 0.15, the pile experiences a decompaction until a particular value of the packing fraction 0.56 corresponding to a random loose packing configuration for monosized spheres. Moreover, the decompaction starts after a cycling number that decreases exponentially with the liquid content. Finally, we show that the packing dynamics can be well modeled on the basis of a Landau potential with an asymmetric double-well structure. The onset of decompaction represents the tendency of the ?

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