A soil has a liquid limit of 40% and lies above the A-line when plotted on plasticity chart. As per IS soil classification, the group symbol of the soil is
A soil has a liquid limit of 40% and lies above the A-line when plotted on plasticity chart. As per IS soil classification, the group symbol of the soil is Correct Answer CI
Fine grained soil are classified on the basis of plastic chart. Clay is found to exist above A-line whereas silt & organic soil found to exist below A-line.
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Suffix and prefix used in soil classification:
|
Soil Type |
Prefix |
Soil Type |
Suffix |
|
Gravel |
G |
Well graded |
W |
|
Sand |
S |
Poorly graded |
P |
|
Silt |
M |
Clayey |
C |
|
Clay |
C |
Silty |
M |
|
Organic |
O |
Low compressibility |
L |
|
Peat |
Pt |
Intermediate compressibility |
I |
|
|
|
High compressibility |
H |
∴ A soil has a liquid limit of 40% and lies above the A-line when plotted on plasticity chart is CI.