Question
Download Solution PDFSoil with particle size less than ______ mm is called fine grained soil (silt or clay).
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
In the Indian Standard Soil Classification System (ISSCS) or BIS, soils are classified according to their grain size as boulder, cobble, gravel, sand, silt, or clay, as shown below in the tabulated form.
|
Soil Group |
Type of Soil |
Sub - Group |
Size Range |
|
Very Coarse Soils |
Boulder |
|
> 300 mm |
|
Cobble |
|
80 – 300 mm |
|
|
Coarse Soils |
Gravel |
Coarse |
20 – 80 mm |
|
Fine |
4.75 – 20 mm |
||
|
Sand |
Coarse |
2- 4.75 mm |
|
|
Medium |
0.425- 2 mm |
||
|
Fine |
0.075 – 0.425 mm |
||
|
Fine Soils |
Silt |
|
0.002 – 0.075 mm |
|
Clay |
|
< 0.002 mm |
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