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http://dx.doi.org/10.7843/kgs.2007.23.5.143

Effect of Stress Level on Strength Parameters of Cemented Sand  

Lee, Moon-Joo (Dept. of Civil and Environmental Engrg., Korea Univ.)
Choi, Sung-Kun (Dept. of Civil and Environmental Engrg., Korea Univ.)
Choo, Hyun-Wook (Dept. of Civil and Environmental Engrg., Korea Univ.)
Cho, Yong-Soon (Dept. of Civil and Environmental Engrg., Korea Univ.)
Lee, Woo-Jin (Dept. of Civil and Environmental Engrg., Korea Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.23, no.5, 2007 , pp. 143-151 More about this Journal
Abstract
The factors affecting the geotechnical properties of cemented sands are known to be relative density, cementation level, stress level, and particle characteristics such as particle size, shape and surface conditions. It has been widely accepted that the friction angle of cemented sands is not affected by cementation while the cohesion of cemented sands was significantly influenced by cementation. The cementation that is a critical component of the strength of cemented sands will be broken with increasing confining pressure and great caution is required in evaluating the cohesion of cemented specimens due to their fragilities. In this study, a series of drained shear tests were performed with specimens at various cementation levels and confining stresses to evaluate the strength parameters of cemented sands. From the experiments, it was concluded that the cohesion intercept of cemented sand experiences three distinctive zone(cementation control zone, transition zone, and stress control zone), as the cementation level and the confining stress varies. In addition, for accurate evaluation of the strength parameters, the level of confining stress triggering the breakage of cementation bond should be determined. In this study, the relationship between the maximum confining stresses capable of maintaining the cementation bond intact and unconfined compression strength of the cemented sand was established.
Keywords
Cementation; Cementation level; Cohesion; Drained triaxial test; Friction angle; Stress level;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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