Consistency of silts and clays

Definition

Consistency of silts and clays

Consistency Index Ic

Very soft

< 0.25

Soft

0.25 to 0.50

Firm

0.50 to 0.75

Stiff

0.75 to 1.00

Very stiff

> 1.00

 

Reference

See ISO 14688-2

 

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