Situation 12 - The given data shows the sieve analysis of three soil samples.Compute for the group index of Soil A, B and C. Sieve DiamSoilSoil B Soil CNo.(mm)A2.000No.1092777853No.400.4205184No.2000.074173363LL4647PL29243520 Silt-clay Materials(More than 35% of total sample passing No. 200)General ClassificationSilt-clay MaterialsGeneral Classification(35% or less of total sample passing No. 200)A-2A-2-5A-7A-7-5A-7-6A-1Group ClassificationA-4A-5A-6Group ClassificationA-3A-1-aA-1-bA-2-4A-2-6A-2-7Sieve Analysis(Percent Analysis)No. 10No. 40No. 200Characteristic ofFraction Passing No.Sieve Analysis(Percent Analysis)No. 10No. 40No. 20050 max30 max50 max51 min15 max25 max10 max35 max35 max35 max35 max36 min36 min36 min36 minCharacteristics of FractionPassing No. 40Liquid LimitPlasticity Index4040 max41 min40 max41minLiquid LimitPlasticity IndexUsual types ofsignificant constituentmaterialsGeneral subgraderating40 max41 min40 max41 min10 max10 max11 min11 min6 maxNP10 max10 max11 min11 minClayey SoilsUsual types of significantconstituent materialsSilty SoilssStone fragments,gravel, and sandFineSilty or clayey gravel and sandsandFair to PoorGeneral subgrade ratingFor A-7-5, PI s LL - 30For A-7-6, PI > LL - 30Excellent to Good

Answered: Image /qna-images/answer/250b923d-9113-4432-92c4-5ec16bdc07b3.jpg

Answered: Soil B Soil C Sieve No. Diam Soil (mm)…

Soil B Soil C Sieve No. Diam Soil (mm) A 92 78 No. 10 2.000 77 0.420 53 No. 40 84 0.074 No. 200 17 33 63 LL 35 46 47 PL 20 29 24 51

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Soil engineering for highway design

Soil engineering is a part of geotechnical engineering that deals with the characteristics of soil. It also helps to understand the behavior of the soil in different conditions. The basic concepts of soil are studied to check the strength, compressibility, and porosity of the soil. This makes soil engineering an important topic for civil engineering.

Question

Situation 12 - The given data shows the sieve analysis of three soil samples. Compute for the group index of Soil A, B and C.

Sieve Diam
Soil
Soil B Soil C
No.
(mm)
A
2.000
No.
10
92
77
78
53
No.
40
0.420
51
84
No.
200
0.074
17
33
63
LL
46
47
PL
29
24
35
20

Silt-clay Materials
(More than 35% of total sample passing No. 200)
General Classification
Silt-clay Materials
General Classification
(35% or less of total sample passing No. 200)
A-2
A-2-5
A-7
A-7-5
A-7-6
A-1
Group Classification
A-4
A-5
A-6
Group Classification
A-3
A-1-a
A-1-b
A-2-4
A-2-6
A-2-7
Sieve Analysis
(Percent Analysis)
No. 10
No. 40
No. 200
Characteristic of
Fraction Passing No.
Sieve Analysis
(Percent Analysis)
No. 10
No. 40
No. 200
50 max
30 max
50 max
51 min
15 max
25 max
10 max
35 max
35 max
35 max
35 max
36 min
36 min
36 min
36 min
Characteristics of Fraction
Passing No. 40
Liquid Limit
Plasticity Index
40
40 max
41 min
40 max
41min
Liquid Limit
Plasticity Index
Usual types of
significant constituent
materials
General subgrade
rating
40 max
41 min
40 max
41 min
10 max
10 max
11 min
11 min
6 max
NP
10 max
10 max
11 min
11 min
Clayey Soils
Usual types of significant
constituent materials
Silty Soils
s
Stone fragments,
gravel, and sand
Fine
Silty or clayey gravel and sand
sand
Fair to Poor
General subgrade rating
For A-7-5, PI s LL - 30
For A-7-6, PI > LL - 30
Excellent to Good

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