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http://dx.doi.org/10.7843/kgs.2009.25.4.105

Characteristics of Friction Angles between the Nak-dong River Sand and Construction Materials by Direct Shear Test  

Kim, Young-Su (Dept. of Civil Engrg., Kyungpook National Univ.)
Kim, Dae-Man (Dept. of Civil Engrg., KNU)
Publication Information
Journal of the Korean Geotechnical Society / v.25, no.4, 2009 , pp. 105-112 More about this Journal
Abstract
In this study, a series of direct shear tests were performed to investigate the characteristics of friction angles for sands and interface friction angle between sands and construction materials with respect to different relative density of the Nak-dong River sands and shearing velocity. The result of the test shows that friction angles of sands are always higher than interface friction angle between sands and construction materials. As the shearing velocity get faster, the friction angles of sand became higher. With respect to the density of sand by reducing void ratio, friction angles increase linearly, and relevant equations were proposed to calculate the friction angle by changing void ratio and relative density of sand. The interface roughness of construction materials was also an important factor in interface friction angle.
Keywords
Construction materials; Direct shear test; Interface friction angle; Nak-dong River sand;
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