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A Study on the Relation between Dynamic Deflection Modulus and In-Situ CBR Using a Portable FWD  

Kang, Hee Bog (한영대학 토목환경과)
Kim, Kyo Jun (전남대학교)
Park, Sung Kyoon (전남대학교 토목공학과, 남양건설(주))
Kim, Jong Ryeol (전남대학교 토목공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.12, no.2, 2008 , pp. 149-155 More about this Journal
Abstract
The road construction, as part of effort to ease the worsening traffic, has been underway throughout the nation, while the existing road has been increasingly losing its load carrying capacity due to such factors as heavy traffic and weathering. In the case of site, the soil type, plasticity index, and specific gravity were SC, 12.2%, and 2.66, respectively. The maximum dry density, optimum moisture content and modified CBR were $1.895g/cm^3$ (Modified Compaction D), 13.6%, and 16.2%, respectively. A correlation of coefficient expressed good interrelationship by 0.90 between the CBR estimated from a dynamic penetration index of dynamic cone penetrometer test and a deformation modulus converted from a dynamic deflection modulus obtained from a portable FWD test.
Keywords
Dynamic deflection modulus; Dynamic penetration index; In-situ CBR; Portable FWD;
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