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http://dx.doi.org/10.7843/kgs.2022.38.8.7

Evaluation of the Mechanical Characteristics of Frozen Sand, Considering Temperature and Confining Pressure Effects, in a Cryogenic Triaxial Compression Test  

Park, Sangyeong (Dept. of Civil, Environmental and Architectural Engrg., Korea Univ.)
Jung, Sanghoon (Plant Civil and Structural Team, Hyundai Engrg.)
Hwang, Chaemin (Dept. of Civil, Environmental and Architectural Engrg., Korea Univ.)
Choi, Hangseok (Dept. of Civil, Environmental and Architectural Engrg., Korea Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.38, no.8, 2022 , pp. 7-15 More about this Journal
Abstract
Most studies have conducted cryogenic triaxial compression tests with frozen specimens prepared in a separate mold by one-directional freezing. This method has the potential to generate residual stress in a frozen specimen and cannot be adopted to simulate the application of the artificial ground freezing method in the field. Therefore, in this study, novel equipment and procedure for the cryogenic triaxial compression test were proposed to overcome the limitations of existing test methods. Therefore, the mechanical characteristics of frozen sand, considering the effect of temperature and confining pressure, were evaluated. As the freezing temperature decreased, the brittleness of frozen sand increased, and the strength increased due to a decrease in the unfrozen water content and an increase in the ice strength. A higher confining pressure resulted in an increase in interparticle friction and the pressure melting phenomenon, which caused strength reduction. Thus, it was found that the mechanical behaviors of frozen sand were simultaneously affected by both temperature and confining pressure.
Keywords
Cryogenic triaxial compression test; Frozen sand; Ground freezing; Pressure melting; Unfrozen water;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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