Soil Classification based on Size Distribution, Atterberg Limit, Proctor Method and CBR Test

Abstract
The soils are always group in accordance with their performance at a given condition, the report
is based on understanding how soil are classified based on their size distribution, atterberg limit,
proctor method and California bearing ration.
Classification base on soil particle size distribution
Sieve
size
Mass
retained
%
retaine
d
%
passing
53 0 0 100
37.5 0 0 100
26.5 0 0 100
19 0 0 100
13.2 15.4 0.2 99.8
9.5 781.4 11.6 88.2
6.7 1405.7 20.8 67.4
4.75 739 10.9 56.4
2.36 498.8 7.4 49.1
1.18 17.81 5.5 43.6
0.6 11.6 5 38.6
0.425 15.5 6.7 31.9
0.3 22.04 11.6 20.3
0.15 32.37 13.9 6.4
0.075 4.31 1.9 4.5
pan 0.03

Diamete
r (mm)
%
Passing
53 100
37.5 100
26.5 100
19 100
13.2 99.8
9.5 88.2
6.7 67.4
4.75 56.4
2.36 49.1
1.18 43.6
0.6 38.6
0.425 31.9
0.3 20.3
0.15 6.4
0.075 4.5
pan
0.010.1110100
0
10
20
30
40
50
60
70
80
90
100
Particle Diameter (mm)
% Passing
GRAVEL Coarse
SAND
Medium
SAND
Fine
SAND SILT/CLAY

Effective size
From the graph (red line) the value of the sieve diameter that allow 10% of passing sand
0.19 mm
Uniform coefficient
From the graph d60 (blue line) = 5.4 mm
The ratio of d60 to d10 = 0.19 mm
Ratio = 5.4
0.19 = 28.4
Coefficient of curvature
From the graph d30 (orange lin) = 0.4 mm
Cc = D302 *(D10/D60)
= 0.42 * (0.19/5.4)
= 0.0056

REPORT 2
Atterberg limit test
TEST PLASTIC LIMIT LIQUID LIMIT
Variable
NO
1 2 1 2 3 4
Var. Unit
s
Number of Blows N blow
s
Can Number --- ---
Mass of Empty Can MC (g) 13.0
5
13.4
3
13.1
7
13.2
2 12.96 12.98
Mass Can & Soil
(Wet)
M
CMS
(g) 23.6
3
26.0
5
30.4
9
27.1
3 35.17 25.47
Mass Can & Soil
(Dry) MCDS (g) 21.9
6
24.0
3
28.3
5
24.7
5 31.34 23.30
Mass of Soil MS (g) 8.91 10.6
0
15.1
8
11.5
3 18.38 10.32
Mass of Water MW (g) 1.67 2.02 2.14 2.38 3.83 2.17
Water Content w (%) 18.7 19.1 14.1 20.6 20.8 21.0
Liquid Limit (LL or wL)
(%): 20
Plastic Limit (PL or wP)
(%): 19
Plasticity Index (PI)
(%): 105
USCS Classification: