1. The following results were obtained from particle size distribution analysis of three soils - A, B and C. Sieve # 1/2 in 3/8 in #4 # 10 #40 # 100 #200 Diameter (mm) 12.5 9.5 4.75 2 0.425 0.15 0.075 0.02 0.003 0.001 WL (or LL, liquid limit) Wp (or PL, plastic limit) w (natural water content) Percent passing Soil B Soil A 100 96 89 82 67 57 47 28 8 3 25 16 11 100 98 82 33 12 5 5 Soil C 100 99 97 85 55 43 51 19 26.5 Required: (1) Plot the particle size distribution curves (semi-log). Determine the following quantities of each soil: the effective particle size dio, the mean particle side d50, the coefficients of uniformity and curvature (if possible). (2) According to the particle size distribution, when the engineering properties are concerned, which soil is the most sensitive to water and which soil is mostly affected by density? Give you logic. (3) Classify the soils according to the USCS.
1. The following results were obtained from particle size distribution analysis of three soils - A, B and C. Sieve # 1/2 in 3/8 in #4 # 10 #40 # 100 #200 Diameter (mm) 12.5 9.5 4.75 2 0.425 0.15 0.075 0.02 0.003 0.001 WL (or LL, liquid limit) Wp (or PL, plastic limit) w (natural water content) Percent passing Soil B Soil A 100 96 89 82 67 57 47 28 8 3 25 16 11 100 98 82 33 12 5 5 Soil C 100 99 97 85 55 43 51 19 26.5 Required: (1) Plot the particle size distribution curves (semi-log). Determine the following quantities of each soil: the effective particle size dio, the mean particle side d50, the coefficients of uniformity and curvature (if possible). (2) According to the particle size distribution, when the engineering properties are concerned, which soil is the most sensitive to water and which soil is mostly affected by density? Give you logic. (3) Classify the soils according to the USCS.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:1. The following results were obtained from particle size distribution analysis of three soils
- A, B and C.
Sieve #
1/2 in
3/8 in
#4
# 10
#40
#100
#200
Diameter (mm)
12.5
9.5
4.75
2
0.425
0.15
0.075
0.02
0.003
0.001
WL (or LL, liquid limit)
wp (or PL, plastic limit)
w (natural water content)
Soil A
100
96
89
82
67
57
47
28
8
Percent passing
Soil B
3
25
16
11
100
98
82
33
12
5
5
Soil C
100
99
97
85
55
43
51
19
26.5
Required:
(1) Plot the particle size distribution curves (semi-log). Determine the following
quantities of each soil: the effective particle size dio, the mean particle side d50, the
coefficients of uniformity and curvature (if possible).
(2) According to the particle size distribution, when the engineering properties are
concerned, which soil is the most sensitive to water and which soil is mostly affected
by density? Give you logic.
(3) Classify the soils according to the USCS.
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