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Hydraulic conductivity and unfrozen water content of air‐free frozen silt
Author(s) -
Black P. B.,
Miller R. D.
Publication year - 1990
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr026i002p00323
Subject(s) - permeameter , hydraulic conductivity , silt , geotechnical engineering , materials science , conductivity , water content , dilatometer , environmental science , soil science , soil water , geology , composite material , chemistry , paleontology , thermal expansion
Unfrozen water content and hydraulic conductivity data were obtained for an air‐free frozen Alaskan silt using a new form of an ice sandwich dilatometer/permeameter that was designed to allow control of effective stress in the granular matrix through appropriate adjustments of pressure in liquid surrounding a specimen confined as in a triaxial test apparatus. Experimental complications included rejuvenation of conductivity during prolonged periods of equilibrium (no flow) after each temperature step immediately followed by very slow but continuing decay, as if without limit. When a formula of the Brooks and Corey type was fitted to unfrozen water content data, hydraulic conductivities inferred from the formula parameter, through the model of Mualem, provided an acceptable description of observed conductivity values, as measured immediately after the equilibrium period.