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        Peak 값을 갖는 입도를 찾는다. 

  • 직접 전단 실험을 통하여 마찰각 측정 

  - Jamming이 발생하여 concrete 처럼 단단해짐

{Frictional angle  vs  Puzzle Soil size distribution]

  • Specific distributions show the peak angles

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  • Fictional angle increases exponentially with Puzzle Soil application.

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  • A rise of 3' in frictional angle may lead to an increase in Bearing Capacity at about twice.