Q. No 2. A fine grained soil has a liquid limit of 300% and a plastic limit of 55%. The natural water content of a soil in the field is 80% and the clay content is 60%. a) Determine the plasticity index, the liquidity index, and the activity? b) What is the soil state in the field? c) What is the predominant mineral in this soil?

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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Please solve questions number (2) all parts. If a Registration number is needed put 4268
Q. No 1. Solve the following example for D10, D30, D60, coefficient of curvature and coefficient of
uniformity using graphical method and classify the soil on the basis of unified soil classification
system (USCS). Plot the graph in excel.
Sieve Analysis Table
%
Sieve
Mass
Cumulative
Sieve
Cumulative
Sizes
Retained
Mass
%Finer
No
Mass
(Mm)
(Grams)
Retained
Retained
Registration
No /56
Registration
No /36
#4
4.75
#8
2.36
Registration
No /32
Registration
No /29
Registration
No /28
#16
1.18
#30
0.595
# 40
0.425
Registration
No /41
#50
0.297
Registration
No /34
#100
0.149
Registration
No /39
#200
0.075
Registration
No /86
PAN
Q. No 2. A fine grained soil has a liquid limit of 300% and a plastic limit of 55%. The natural
water content of a soil in the field is 80% and the clay content is 60%.
a) Determine the plasticity index, the liquidity index, and the activity?
b) What is the soil state in the field?
c) What is the predominant mineral in this soil?
d) If this soil were under a concrete slab used as a foundation for a building and
water were to seep into it from watering of a lawn, what would you expect to
happen to the foundation?
Transcribed Image Text:Q. No 1. Solve the following example for D10, D30, D60, coefficient of curvature and coefficient of uniformity using graphical method and classify the soil on the basis of unified soil classification system (USCS). Plot the graph in excel. Sieve Analysis Table % Sieve Mass Cumulative Sieve Cumulative Sizes Retained Mass %Finer No Mass (Mm) (Grams) Retained Retained Registration No /56 Registration No /36 #4 4.75 #8 2.36 Registration No /32 Registration No /29 Registration No /28 #16 1.18 #30 0.595 # 40 0.425 Registration No /41 #50 0.297 Registration No /34 #100 0.149 Registration No /39 #200 0.075 Registration No /86 PAN Q. No 2. A fine grained soil has a liquid limit of 300% and a plastic limit of 55%. The natural water content of a soil in the field is 80% and the clay content is 60%. a) Determine the plasticity index, the liquidity index, and the activity? b) What is the soil state in the field? c) What is the predominant mineral in this soil? d) If this soil were under a concrete slab used as a foundation for a building and water were to seep into it from watering of a lawn, what would you expect to happen to the foundation?
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