CIVENG_3715 Assignment 1
Due date 09/08/2025
1. The following are the results of a sieve analysis
a. Determine the percent finer than each sieve and plot a particle size distribution
curve.
U.S. Sieve No.
4
10
20
40
60
80
100
200
pan
Mass of Soil
Retained (g)
0
44
56
82
51
106
92
85
35
b. Determine D10, D30, and D60 from the grain-size distribution curve.
Sieve
No.
4
10
20
40
60
80
100
200
pan
Opening Mass
Cumlative Percent
size mm retained mass
Finer
g
g
%
4.75
0
100
2
44
44 92.01452
0.85
56
100 81.85118
0.425
82
182 66.96915
0.25
51
233 57.71325
0.18
106
339 38.4755
0.15
92
431 21.77858
0.075
85
516 6.352087
35
551
0
total =
551
Seive Analysis
100
Seive Analysis
Percent Finer (%)
80
60
40
20
0
5
0.5
Partical Size (mm)
0.05
c. Calculate the uniformity coefficient, Cu.
𝐷60
= 𝐶𝑢
𝐷10
0.293/.089=3.29213
d. Calculate the coefficient of gradation, Cc.
0.1642
= 1.031407
. 293 ∗ .089
e. Determine the percentages of gravel, sand, silt, and clay according to the USC
system.
Gravel-0%
Sand- 93.7%
Silt/Clay – 6.3%
2.
Chart Title
100
Percent FIner
80
60
40
20
0
0.1
0.01
0.001
Partical Size (mm)
a.
b. Determine the percentages of gravel, sand, silt, and clay according to the
AASHTO system
Gravel – 0%
Sand – 6.8%
Clay- 41.6%
Silt – 51.6%
3.
𝐶𝑢 =
𝐶𝑐 =
0.41
= 5.13
0.08
. 222
= 1.48
0.41 ∗ .08