Question: A cone penetration test on a coarse - grained soil with mean particle size ( D 5 0 ) of 0 . 5 m m

A cone penetration test on a coarse-grained soil with mean particle size (D50) of 0.5mm produced a cone resistance (qc) of 100kgcm2 and a friction ratio (Rf) of 2%.
Estimate the equivalent SPT N60 value.
According to the soil behavior type chart for CPT, what do you think the most likely soil type is for this soil?

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