Soil Index Formulas Flashcards
1
Q
Void Ratio
A
e
2
Q
Porosity
A
n
3
Q
Degree of saturation
A
S
4
Q
Specific gravity
A
G
5
Q
Bulk density
A
Pb
6
Q
Dry density
A
Pd
7
Q
Moisture content
A
m
8
Q
Percent air voids
A
A
9
Q
Void ratio formulas
A
volume of voids
e = ——————–
volume of solids
(1+e)=Pw • G
——–
Pd
e=m • G
——
S
10
Q
Pw
A
Density of water
1000 kg/m3
11
Q
Gravity
A
9.81 m/s2
12
Q
Porosity formula
A
volume of voids
n = ——————
volume of soil
e n = -------------
1 + e
13
Q
Degree of saturation formula
A
volume of water
S = ———x 100%
volume of voids
m•G S = ---------------
e
14
Q
Specific Gravity formula
A
Ms
G = —————
Vs • Pw
Pw=1000 kg/m3
15
Q
Bulk Density formula
A
Ms+Mw
Pb= —————- in kg/m3
V
Pw (G + eS) Pb= -----------------
1 + e
