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Journal of the Korea Concrete Institute

J Korea Inst. Struct. Maint. Insp.
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  • Korea Citation Index (KCI)

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Title A Study on the Relation between Dynamic Deflection Modulus and In-Situ CBR Using a Portable FWD
Authors 강희복 ; 김교준 ; 박승균 ; 김종렬
Page pp.149-155
ISSN 1226-6205
Keywords 정적변형계수 ; 동적변형계수 ; 추정 CBR ; 소형FWD ; Dynamic deflection modulus ; Dynamic penetration index ; In-situ CBR ; Portable FWD
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/㎤ (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.