Inputs
PI = LL − PL auto.
Logic
- USCS: ASTM D2487 — coarse vs fine grained based on % passing #200.
- Cu = D60/D10, Cc = D30² / (D60·D10).
- Plasticity chart line A: PI = 0.73·(LL − 20).
- AASHTO M145: A-1 / A-2 / A-3 / A-4 / A-5 / A-6 / A-7 with group index (GI).
Results
Cu—
Cc—
Plasticity Index—
A-line—
USCS Symbol—
AASHTO Group—
Group Index GI—