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http://dx.doi.org/10.7843/kgs.2013.29.10.67

Effect of Engineering Properties on Resilient Modulus of Cohesive Soil as Subgrade  

Kim, Dong-Gyou (Geotechnical Eng. Research Division, Korea Institute of Construction Technology)
Lee, Ju-Hyung (Geotechnical Eng. Research Division, Korea Institute of Construction Technology)
Hwang, Young-Cheol (Dept. of Construition System Eng., Sangji Univ.)
Chang, Buhm-Soo (Institute of Infrastructure Safety, Korea Infrastructure Safety and Technology Corporation)
Publication Information
Journal of the Korean Geotechnical Society / v.29, no.10, 2013 , pp. 67-74 More about this Journal
Abstract
The objective of this study was to identify the effect of engineering properties on the resilient modulus ($M_r$) of cohesive soils as subgrade. Eight representative cohesive soils representing A-6, and A-7-6 soil types collected from road construction sites, were tested in the laboratory to determine their basic engineering properties. The laboratory tests for the engineering properties were Atterberg limits test, sieve analysis, hydrometer test, Standard Proctor compaction test, and unconfined compressive strength test. Resilient modulus test and unconfined compressive strength test were conducted on unsaturated cohesive soils at three different moisture contents (dry of optimum moisture content, optimum moisture content, and wet of optimum moisture content). The increase in moisture content considerably affected the decrease in the resilient modulus. The resilient modulus increased with an increase in maximum unconfined compressive strength, percent of clay, percent of silt and clay, liquid limit and plasticity index. The resilient modulus decreased with an increase in percent of sand.
Keywords
Cohesive soil; Engineering properties; Resilient modulus; Subgrade;
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