Geoscience Reference
In-Depth Information
Table 3.4 Atterberg limits of various soil deposits.
Soil deposits
Liquid limit (%)
Plastic limit (%)
Malaysia west coast clay
56-90
35-30
Fen peat
200-600
-
Bog peat
800-1500
-
Antoniny fibrous peat, Poland
305-310
-
Cork amorphous peat, Ireland
690
561
Cranberry bog peat, Massachusetts
580-600
375-400
West Malaysia peat
190-360
100-200
Samarahan (East Malaysia) (hemic) peat
210-550
125-297
Table 3.5 Typical unit weight of various soils.
γ (kN m 3 )
γ (kN m 3 )
Soil Type
(above water table)
(below water table)
Mineral soils
Gravel
17.5-20.5
19.5-22.0
Sand
15.0-21.0
19.0-23.0
Silty sand
12.5-21.0
17.5-22.0
Clayey sand
13.5-20.5
17.5-21.0
Silt
11.5-17.5
11.5-20.5
Clay
12.5-17.5
11.0-19.5
Organic soil
Bog peat
9.5-10.5
Fen peat
8.5-11.0
Peaty clay
10.0-13.0
Quebec fibrous peat
8.7-10.4
Antoniny fibrous peat, Poland
10.5-11.1
Co. Offaly fibrous peat, Ireland
10.2-11.3
Cork amorphous peat, Ireland
10.2
Cranberry bog peat, Massachusetts
10.1-10.4
Austria peat
9.8-13.0
Italy peat
10.2-14.3
Hokkaido peat
9.5-11.2
West Malaysia peat
8.3-11.5
East Malaysia peat
8.0-12.0
Kalimantan peat
8.0-14.0
Sumatra peat
4.0-9.0
of peat has been subjected. The dry density of peat is usually about 1.3 kNm 3 , but it
can be as low as 0.7 kNm 3 . For West Malaysia hemic peat the value ranges from 1.2
to 1.5 kNm 3 .
The specific gravity of any material is the ratio of its density to that of water. For
soil it is computed for the solid phase only:
G s
=
M s /V s
ρ w
(3.7)
where ρ w =
density of water
 
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