Structure and porosity of smectitic mudrocks as affected by experimental wetting-drying cycles and freezing-thawing cycles

Auteur(s) et Affiliation(s)



Description :
The erosion rates in the Vallcebre basin (Pyrenees) are controlled predominantly by the physical weathering rate of bare regolith, i.e. mudrocks. To obtain information on the influence of thermic and moisture regimes on the weathering dynamics, laboratory experiments were carried out to investigate how freezing-thawing or wetting-drying cycles, under controlled conditions, affect structure and porosity. Data from wetting-drying cycles showed that changes in water content alone did not produce deep structural modifications. A mechanism of alteration of soil sructure during freezing-thawing cycles is proposed.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 1996, vol. 27, n°. 3-4, p. 149-165, Collation : Illustration, Références bibliographiques : 34 ref.

Date :
1996

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena