Influence of freezing temperature on hydraulic conductivity of silty clay
Journal Article
·
· Journal of Geotechnical and Geoenvironmental Engineering
The low hydraulic conductivity of compacted clays combined with their availability and relatively low cost make them potential materials to use in cover systems above landfills for environmental protection. Hydraulic conductivity of thawed consolidated slurries of a silty clay from Lachute, Quebec, Canada, subjected to closed-system freezing at different temperatures ranging from {minus}2 to {minus}12 C were determined from constant-head permeability tests. The permeability index defined as the slope of the relation between log {kappa} and void ratio was found to increase with decreasing temperature. It was also established that the ultimate permeability index was related to the temperature at which no further change in unfrozen water content occurs. For the silty clay studied, the permeability index increased from 1.4 for the unfrozen soil prior to freezing to a maximum value of 8 at a temperature of {minus}12 C.
- Research Organization:
- Univ. Laval, Sainte-Foy, PQ (CA)
- OSTI ID:
- 20014571
- Journal Information:
- Journal of Geotechnical and Geoenvironmental Engineering, Journal Name: Journal of Geotechnical and Geoenvironmental Engineering Journal Issue: 2 Vol. 126; ISSN 1090-0241; ISSN JGGEFK
- Country of Publication:
- United States
- Language:
- English
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