Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Chapter 5, Problem 5.5P
To determine
Find the group symbols for the fine-grained soils using the Unified soil classification system.
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The sieve analysis of four soils and the liquid and plastic limits of the fraction passing
through the No. 40 sieve are given below. Classify the soils using the AASHTO
classification system and give the group indexes. Comment on the suitability of the soils
as subgrade material.
Sieve analysis (percent finer)
Soil No.
No. 10
No. 40
No. 200
Liquid limit
Plastic limit
100
80
58
30
20
2
95
60
20
3
90
76
34
37
25
4
48
28
NP
[Das B. M. Principles of Geotechnical Engineering (7E), pp. 101, 102, 112]
1
The sieve analysis of four soils and the liquid and plastic limits of the fraction passing
through the No. 40 sieve are given below. Classify the soils using the AASHTO
classification system and give the group indexes. Comment on the suitability of the soils
as subgrade material.
Sieve analysis (percent finer)
Soil No.
No. 10
No. 40
No. 200
Liquid limit Plastic limit
100
80
58
30
20
2
95
60
20
90
76
34
37
25
4
48
28
6
NP
2. Classify the following soils by the AASHTO classification system. Give the group index for
each soil. Show the step-by-step process of classifying each soil using the AASHTO table.
Soil
A
B
C
Sieve analysis-
Percent finer
No. 40
No. 10
90
86
42
92
90
28
68
48
No. 200
32
8
12
30
22
Liquid
28
NP
18
42
Plasticity
index
9
in o
Chapter 5 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
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- Following details regarding the particle size distribution and other index properties pertinent to the classification of soil. Choose three soils and classify each soil according to USCS and AASHTO classification systems. When necessary, assume Cu = 4.48 and Cc = 1.22.arrow_forwardQuestion 5 The sieve analysis of soil and the liquid and plastic limits of the fraction passing through the No. 40 sieve are given below. Classify the soils using the AASHTO classification system and give the group indexes. % Passing No. 10: 98 % Passing No. 40: 80 % Passing No. 200: 50 LL = 38 %3D PL = 29 Group classification: Blank 1 Group index: Blank 2arrow_forwardThe sieve analysis of six soils and the liquid and plastic limits of the fraction passing through the No. 40 sieve are given below in Table 1. Classify the soils by the AASHTO classification system and give the group index for each soil. Table 1: Sieve analysis, liquid and plastic limits of soil Sieve analysis-Percent finer Soil No. 10 No. 40 No. 200 Liquid limit Plastic Limit 1 98 80 50 38 29 100 92 80 56 23 100 88 65 37 22 4 85 55 45 28 20 92 75 62 43 28 6. 97 60 30 25 16arrow_forward
- The result of sieve analysis of three soils is given next. It is required to classify these soils according to the AASHTO Classification System. Use the attached AASHTO Classification of Highway Subgrade Materials Table. (a) Classification of Soil A. (b) Classification of Soil B. (c) Classification of Soil C. Sieve Analysis Results for Situation 9 Sieve Analysis Sieve Diameter, Percent Passing Number mm. 4.76 90 100 100 8. 2.38 84 90 100 10 2. 72 77 98 20 0.84 66 59 91 40 0.42 58 50 85 60 0.25 50 42 79 100 0.149 44 36 70 200 0.074 38 33 LL 42 46 47 PL 23 29 24 63arrow_forward2. Classify the following soils by the AASHTO classification system. Give the group index for each soil. Show the step-by-step process of classifying each soil using the AASHTO table. Soil A B с D E Sieve analysis- Percent finer No. 40 No. 10 90 86 42 92 90 74 56 28 68 48 No. 200 32 8 12 30 22 Liquid limit 28 NP 18 42 31 Plasticity index 9 13 18 5arrow_forwardQuestion 3 The sieve analysis of soil and the liquid and plastic limits of the fraction passing through the No. 40 sieve are given below. Classify the soils using the AASHTO classification system and give the group indexes. % Passing No. 10: 48 % Passing No. 40: 28 % Passing No. 200: 6 LL = - %3D PL = NP Group classification: Blank 1 Group index: Blank 2arrow_forward
- 5.2 The sieve analysis of ten soils and the liquid and plastic limits of the fraction pass- ing through the No. 40 sieve are given below. Classify the soils using the AASHTO classification system and give the group indexes. Sieve analysis (percent finer) Soil No. Liquid limit Plastic limit No. 10 No. 40 No. 200 1 98 80 50 38 29 2 100 92 80 56 23 3 100 88 65 37 22 4 85 55 45 28 20 5 92 75 62 43 28 6 48 28 NP 7 87 62 30 32 24 8 90 76 34 37 25 100 78 8 NP 10 92 74 32 44 35arrow_forward5.4 The sieve analysis of ten soils and the liquid and plastic limits of the fraction passing through the No. 40 sieve are given below. Classify the soils by the AASHTO classification system and give the group index for each soil.arrow_forwardThe sieve analysis of ten soils and the liquid and plastic limits of the fraction passing through the No. 40 sieve are given below. Classify the soils using the AASHTO classification system and give the group indexes. % Passing No. 10: 92 % Passing No. 40: 75 % Passing No. 200: 62 LL = 43 PL = 28 Group classification: Blank 1 Group index: Blank 2 Blank 1 Add your answer Blank 2 Add your answerarrow_forward
- Repeat Problem 2.11 with the following data. 2.11 The grain-size characteristics of a soil are given in the following table. a. Draw the grain-size distribution curve. b. Determine the percentages of gravel, sand, silt, and clay according to the MIT system. c. Repeat Part b using the USDA system. d. Repeat Part b using the AASHTO system.arrow_forwardThe sieve analysis of (2) soils and the liquid and plastic limits of the fraction passing through the No. 40 sieve are given in the folllowing table. 1. Classify the soils according to Unified soil classification system (USCS) given the group symbol and name 2. Classify the soils according to AASHTO sistem and find the group index (GI) D10 Soil A B 4 98 100 Seive No % passing 20 40 50 28 100 99 10 86 100 60 100 200 18 14 10 95 90 73 Attereberg limits L.L P.L N.P 27 55 D30 D60 1.5 0.075 0.43 0.001 0.003 0.053arrow_forwardSITUATION 9 The result of sieve analysis of three soils is given next. It is required to classify these soils according to the AASHTO Classification System. Use the attached AASHTO Classification of Highway Subgrade Materials Table. (a) Classification of Soil A. (b) Classification of Soil B. (c) Classification of Soil C. Sieve Analysis Results for Situation 9 Sieve Analysis Sieve Diameter, Percent Passing Number mm. 4.76 90 100 100 8. 2.38 84 90 100 10 2. 72 77 98 20 0.84 66 59 91 40 0.42 58 50 85 60 0.25 50 42 79 100 0.149 44 36 70 200 0.074 38 33 LL 42 46 47 PL 23 29 24 63arrow_forward
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