From the given data, shows a sieve analysis of soil samples. Soil Sample Sieve Diam A no. (mm) # 4 4.760 90 100 100 #8 2.380 64 90 100 # 10 2.000 54 77 98 #20 0.840 34 59 92 # 40 0.420 22 51 84 # 60 0.250 17 42 79 #100 0.149 35 70 # 200 0.074 33 63 Characteristics of - 40 fraction LL 46 47 PL 29 24 5.
From the given data, shows a sieve analysis of soil samples. Soil Sample Sieve Diam A no. (mm) # 4 4.760 90 100 100 #8 2.380 64 90 100 # 10 2.000 54 77 98 #20 0.840 34 59 92 # 40 0.420 22 51 84 # 60 0.250 17 42 79 #100 0.149 35 70 # 200 0.074 33 63 Characteristics of - 40 fraction LL 46 47 PL 29 24 5.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Classify Soil A, B, C using AASHTO method.
Transcribed Image Text:From the given data, shows a sieve analysis of soil samples.
Soil Sample
Sieve Diam
A
no. (mm)
# 4 4.760 90
100
100
#8 2.380 64
90
100
#10 2.000 54
77
98
#20 0.840 34
59
92
# 40 0.420 22
51
84
# 60 0.250 17
42
79
#100 0.149
35
70
# 200 0.074
33
63
Characteristics of - 40
fraction
LL
46
47
PL
29
24
B.
5.
Transcribed Image Text:Granular Materials (35% or less passing
the 0.075 mm sieve)
Silt-Clay
(>35% passi
mm sieve)
General
Classification
A-1
А-2
Group Classification
A-3 A-2- A-2- A-2- A-2- A-4 A-5
А-1-а А-1-b
4
7
Sieve Analysis,
passing
2.00 mm (No. 10)
50 max ….
51
30 max 50 max
min
0.425 (No. 40)
...
....
...
...
...
...
10
15 max 25 max|
35
35
35
35
36
36
0.075 (No. 200)
max max max max max min min
Characteristics
of
fraction passing 0.425
mm (No. 40)
40
41
40
41
40
41
Liquid Limit
...
...
max min max min max min
10
N.P.
10 11 11
10
10
Plasticity Index
6 max
max max min min max
max
stone
Usual
types
fragments,
significant constituent
gravel
fine silty or clayey gravel silty soils
and sand and sand
materials
sand
General rating as
subgrade
a
excellent to good
fair to poor
Note: Plasticity index of A-7-5 subgroup is equal to or less than the LL - 30. Pl
of A-7-6 subgroup is greater than LL - 30
In the AASHTO system:
gravel is material smaller than 75 mm (3 in.) but retained on a No. 10 si
coarse sand is material passing a No 10 sieve but retained on a No. ·
fine sand is material passing a No. 40 sieve but retained on a No. 200 sie
Material passing the No. 200 sieve is silt-clay and is classified based
1:mite.
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