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http://dx.doi.org/10.14481/jkges.2011.12.8.2

Undrained Shear Behavior of Sandy Soil Mixtures  

Kim, Ukgie (Korea Institute of Construction Technology)
Ahn, Taebong (Department of Civil & Railroad Engineering, Woosong University)
Publication Information
Journal of the Korean GEO-environmental Society / v.12, no.8, 2011 , pp. 13-24 More about this Journal
Abstract
In the part of geotechnical engineering, soils are classified as either the coarse grained soil or the fine-grained soil following the fine content($F_c$=50%) according to the granularity, and appropriate design codes are used respectively to represent their mechanical behaviour. However, sand-clay mixtures, which are typically referred to as intermediate soils, cannot be easily categorized as either sand or clay. In this study, several monotonic undrained shear tests were carried out on Silica sand fine mixtures with various proportions, and a wide range of soil structures, ranging from one with sand dominating the soil structure to one with fines controlling the behaviour, were prepared using compaction method or pre-consoldation methods in prescribed energy. The shear strength of mixtures below the threshold fines content is observed that as the fines content increases, maximum deviator stress ratio decrease for dense samples while an increase is noted for loose samples. Then, by using the concept of fines content and granular void ratio, the monotonic shear strength of the mixtures was estimated. It was found that the shear behavior of mixtures is greatly dependent on the skeleton structure of sand particles.
Keywords
Silica sand; Fine mixtures; Relative density; Deviator stress; Monotonic undrained;
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