40.) The given data shows a sieve analysis of a soil sample. Classify the soil using AASHTO Method. Tables are provided below.Sieve No.Diameter (mm)Percent PassingNo. 44.76096No. 82.38080No. 102.00078No. 200.84061No. 400.42056No. 600.25048No. 1000.15039No. 2000.07533Characteristics of No. 40 FractionLL38PL29 A.A-2-4(0) B.A-1-b(0) C.A-1-a(0) D.A-3(0) E.A-2-5(0) General classificationSilt-clay materials (more than 35% of total sample passing No. 200)A-7A-7-5*Group classificationA-4A-5A-6A-7-6Sieve analysis (percent passing)No. 10No. 40No. 20036 min.36 min.36 min.36 min.Characteristics of fractionpassing No. 40Liquid limitPlasticity index40 max.41 min.40 max.11 min.41 min.10 max.10 max.11 min.Usual types of significantconstituent materialsSilty soilsClayey soilsGeneral subgrade ratingFair to poor*For A-7-5, PI < LL – 30*For A-7-6, PI > LL – 30

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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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40.) The given data shows a sieve analysis of a soil sample. Classify the soil using AASHTO Method. Tables are provided below.

Sieve No.	Diameter (mm)	Percent Passing
No. 4	4.760	96
No. 8	2.380	80
No. 10	2.000	78
No. 20	0.840	61
No. 40	0.420	56
No. 60	0.250	48
No. 100	0.150	39
No. 200	0.075	33
Characteristics of No. 40 Fraction
LL	38
PL	29

A-2-4(0)

A-1-b(0)

A-1-a(0)

A-3(0)

A-2-5(0)

General classification
Silt-clay materials (more than 35% of total sample passing No. 200)
A-7
A-7-5*
Group classification
A-4
A-5
A-6
A-7-6
Sieve analysis (percent passing)
No. 10
No. 40
No. 200
36 min.
36 min.
36 min.
36 min.
Characteristics of fraction
passing No. 40
Liquid limit
Plasticity index
40 max.
41 min.
40 max.
11 min.
41 min.
10 max.
10 max.
11 min.
Usual types of significant
constituent materials
Silty soils
Clayey soils
General subgrade rating
Fair to poor
*For A-7-5, PI < LL – 30
*For A-7-6, PI > LL – 30

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