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Classification of Soil - U1 - Coggle Diagram
Classification of Soil - U1
ASTM
Are 50% of the particles < 0.075 mm?
Yes. 65% of the particles are silt and clay.
Soil is fine-grained
Is liquid limit>50%?
No.
Plasticity is low. Second letter is L. Soil is lean clay or silt.
Soil is organic or inorganic?
Inorganic.
Plasticity index and plots?
Plasticity index is >7 and plots above A line
Group symbol is CL.
Plus No. 200 sieve?
Particles plus No.200 >30%
% of sand > gravel?
Yes. Sand is 29% and gravel is 6%
Group name?
Sandy lean clay
BSCS
Are 35% of particles<0.06 mm?
Yes. 65% of the particles are silt and clay.
Soil is fine-grained.
% of silt and clay?
35% to 65%
Is sand>gravel?
Yes. Sand is 29% and gravel is 6%
Last letter is S.
Plot on plasticity chart
Plots above A line and falls in the intermediate plasticity zone.
First letter is C. Second letter is I.
Group symbol?
CIS
Group name?
Sandy clay with intermediate plasticity.