Soil Classification (AASHTO and USCS)
Soil Classification (AASHTO and USCS)
Soil Classification (AASHTO and USCS)
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PI<br />
The Plasticity Chart<br />
L<br />
H<br />
LL<br />
(Holtz <strong>and</strong> Kovacs, 1981)<br />
• The A-line generally<br />
separates the more<br />
claylike materials<br />
from silty materials,<br />
<strong>and</strong> the organics<br />
from the inorganics.<br />
• The U-line indicates<br />
the upper bound for<br />
general soils.<br />
Note: If the measured<br />
limits of soils are on<br />
the left of U-line,<br />
they should be<br />
rechecked.
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