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http://dx.doi.org/10.7843/kgs.2012.28.9.97

Influences of Confining Pressure and Fines Content on Compressibility Characteristics of Sand  

Kim, Uk-Gie (Geotechnical Engineering Research Division, KITC)
Zhuang, Li (Dept. of Civil Engineering, Korea Univ.)
Kim, Ju-Hyun (railroad department, Dowha Engineering)
Publication Information
Journal of the Korean Geotechnical Society / v.28, no.9, 2012 , pp. 97-106 More about this Journal
Abstract
In order to investigate mechanics of mixtures composed of sand and non-plastic silt, various specimens, with sand dominating the soil structure, and with varying fines content, fines content varying were produced. Isotropic consolidation tests were performed using high pressure triaxial test apparatus within high pressure levels where sand grain crushing happened. Experimental results showed that compressive curve of sand after yielding contracts to the NCL due to breakage of sand grains. Moreover, with the increase of fines content, coarse grains are surrounded by fines to form cushion effect, which made the breakage of coarse grains become difficult. Therefore, the maximum inclination of compressive curve became flatter and yield stress increased.
Keywords
High pressure triaxial test; Sand-fines mixture; Fines content; Compression index; Crushing strength;
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