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http://dx.doi.org/10.7843/kgs.2008.24.1.51

Effect of Fines Content on the Cyclic Shear Characteristics of Sand-clay Mixtures  

Kim, Uk-Gie (Dept. of Civil Engrg., Yamaguchi Univ.)
Hyodo, Masayuki (Dept. of Civil Engrg., Yamaguchi Univ.)
Ahn, Tae-Bong (Dept. of Civil Engrg., Woosong Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.24, no.1, 2008 , pp. 51-59 More about this Journal
Abstract
In this study, cyclic shear characterics of sand-clay mixtures were analyzed. In order to perform cyclic triaxial tests on sand clay mixtures, natural clays with activity and silica sand were mixed variously to reproduce soils with wide range of grain size compositions. Test specimens with various fines contents were prepared by the moisture compaction and pre-consolidation methods, while paying attention to the void ratio expressed in terms of the sand structure and clay structures, and undrained cyclic shear tests were performed. In the test results, cyclic shear strength decreased with increasing of sand granular void ratio below 20% of fine contents. When the granular void ratio of the test specimen exceeded the maximum void ratio of the silica sand, the clay matrix dominated the soil structure, and soil structures were not influenced by compaction energy. It was observed that, the matrix structure of the coarse particles has great effect on the undrained cyclic shear strength characteristics for sand-clay mixtures, and therefore, it is more appropriate to pay more attention to the density of the sand structure, rather than to the fines content.
Keywords
Cyclic shear strength; Fines content; Granular void ratio; Monotonic shear strength; Sand-clay mixture;
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Times Cited By KSCI : 1  (Citation Analysis)
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