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- W3110046649 endingPage "105921" @default.
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- W3110046649 abstract "The change of soil macropores, especially fissures, due to freeze-thaw (F-T) has important implications for soil engineering properties such as hydraulic conductivity and compressibility. This paper describes a quantitative study of the soil macropore changes due to F-T by using three-dimensional (3D) X-ray Computed Tomography (CT). Saturated lean clay specimens were subjected to unidirectional F-T under different water-supply conditions for acquiring 3D X-ray CT images before and after F-T. The CT imagery data were filtered and processed for obtaining parameters such as transverse-sectional macro-porosity, macropore size, transverse-sectional fissure porosity, and longitudinal-sectional fissure orientation frequency distribution. It was found that F-T alters the transverse-sectional macro-porosity and macropore size significantly, the changes are different across the specimen height. Moreover, the changes in the transverse-sectional fissure porosity and longitudinal-sectional fissure orientation frequency distribution vary along with the specimen height. More horizontal fissures form in the unfrozen zone or near the freezing front, depending on water-supply conditions. Pore water pressure data confirm that, besides water migration, soil particles also migrate from the unfrozen zone to the freezing front during freezing with water-supply due to piping. The macropore structural changes help understand the F-T impact on soil engineering properties such as hydraulic permeability and compressibility." @default.
- W3110046649 created "2020-12-07" @default.
- W3110046649 creator A5021186844 @default.
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- W3110046649 date "2021-01-01" @default.
- W3110046649 modified "2023-10-10" @default.
- W3110046649 title "Freeze-thaw impact on macropore structure of clay by 3D X-ray computed tomography" @default.
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- W3110046649 doi "https://doi.org/10.1016/j.enggeo.2020.105921" @default.
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