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http://dx.doi.org/10.7843/kgs.2021.37.12.47

Assessment of the Correlation between Segregation Potential and Hydraulic Conductivity with Fines Fraction  

Jin, Hyunwoo (Dept. of Future & Smart Construction Research, Korea Institute of Civil Engrg. and Building Technology)
Kim, Incheol (Dept. of Civil and Environmental Engrg., College of Engrg., Univ. of Nebraska-Lincoln)
Eun, Jongwan (Dept. of Civil and Environmental Engrg., College of Engrg., Univ. of Nebraska-Lincoln)
Ryu, Byung Hyun (Dept. of Future & Smart Construction Research, Korea Institute of Civil Engrg. and Building Technology)
Lee, Jangguen (Dept. of Future & Smart Construction Research, Korea Institute of Civil Engrg. and Building Technology)
Publication Information
Journal of the Korean Geotechnical Society / v.37, no.12, 2021 , pp. 47-56 More about this Journal
Abstract
The cryosuction (negative pore pressure) in freezing soils causes groundwater migration from the frozen fringe to freezing front for ice lens formation. Frost heave and heaving pressure by ice lens cause damage to ground infrastructure. In order to prevent damage by the frost heave, various frost susceptibility criteria have been proposed. The SP (Segregation Potential) is the most widely used classification criterion for frost susceptibility in cold regions. The expansion of the ice lens by the migration of the groundwater is a key role in frost heave mechanism, and thus it is necessary to evaluate the hydraulic conductivity. In this paper, soil mixtures of coarse-fines (sand-silt) were prepared in various weight fractions and used for frost heave and column permeability test. For each case, the SP and the hydraulic conductivity were derived and correlations were analyzed. As a results, the transition threshold of the SP and the hydraulic conductivity were shown at 20% and 50% of the silt weight fraction, respectively. Although there are difference between these transition thresholds, these two coefficients show a specific correlation. In the future, additional study should be conducted for detailed analysis of the threshold transition values between SP and hydraulic conductivity.
Keywords
Correlation; Frost heave; Frost susceptibility; Hydraulic conductivity; Segregation potential; Transition threshold;
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