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http://dx.doi.org/10.7843/kgs.2016.32.9.29

Analysis of Settlement Characteristics and Strength of Cement Mixing Ratio for a Backfill Material at a Railway Abutment  

Yang, Sang-Beom (Dept. of Civil, Architecture and Environmental Systems Engrg., Sungyunkwan Univ.)
Choi, Chan-Yong (High-Speed Railway Research Division, Korea Railroad Research Institute)
Kim, Nak-Kyung (Dept. of Civil, Architecture and Environmental Systems Engrg., Sungyunkwan Univ.)
Kim, Tae-Kyun (Dept. of Civil and Environment Engrg., Incheon National Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.32, no.9, 2016 , pp. 29-36 More about this Journal
Abstract
Backfill materials of rail abutment were commonly composed with cement treated aggregate, general aggregate and soil. The friction angle of cement treated aggregate increased up to $40^{\circ}$ or more due to strength enhancement. However, $30^{\circ}{\sim}35^{\circ}$ of friction angle was typically applied for in-situ condition. This phenomenon could cause over-designing, therefore, it is essential to determine reasonable material properties of cemented treated aggregate. In this study, a series of CBR tests and circular model tests have been conducted for cement treated aggregate, while changing cement mixing ratio. Based on test results, characteristics of settlement and strength have been analyzed quantitatively. The settlement of cement treated aggregate decreased with the number of cyclic loading and aging period. In addition, The strength increment ratio in CBR test increased up to 13~16 times at 28 days aging.
Keywords
Backfill material; Cement treated aggregate; Curing; CBR; Cyclic loading;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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