Geology Reference
In-Depth Information
Soils Testing Laboratory
Specific Gravity Determination
Sample No.
Project No.
Boring No.
Location
Depth
Description of Sample
Tested by
Date
Trial No.:
1
2
Mass of dish coated with petroleum jelly
wet soil, M
w
(g)
Mass of dish coated with petroleum jelly
oven-dried
soil, M
D
(g)
Mass of dish coated with petroleum jelly (i.e., empty
coated dish), M
T
(g)
Mass of wet soil pat, M (g)
Mass of oven-dried soil pat, M
o
(g)
Mass of water in wet soil pat, (g)
Water content of soil when placed in dish, w(%)
Volume of wet soil pat (i.e., volume of dish), V(cm
3
)
Volume of oven-dried soil pat, V
o
(cm
3
)
1
V
V
o
2
ρ
w
c
d
Shrinkage limit, SL(%)
w
100
M
o
M
o
V
o
ρ
w
Shrinkage ratio,
R
Note:
ρ
w
1.0 g/cm
3
115
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