EBK PRINCIPLES OF GEOTECHNICAL ENGINEER
9th Edition
ISBN: 8220103611718
Author: SOBHAN
Publisher: CENGAGE L
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Chapter 4, Problem 4.2P
To determine
Find the liquid limit value by one point method.
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solve only 4.2 please.
4.2 Refer to the soil in Problem 4.1. A second group of students conducted only one test and found that the groove on the soil sample closed 12.5 mm when N = 21 and w = 30.4%. Estimate the liquid limit by the one-point method.
4.1 problem is provided below:
During Atterberg limit tests in the soil mechanics laboratory, the students obtained the following results from a clayey soil.
Plastic limit tests: Students conducted two trials and found that PL = 17.2% for the first trial and PL = 17.8% for the second trial.
a. Draw the flow curve and obtain the liquid limit.
b. What is the plasticity index of the soil? Use an average value of PL from the two plastic limit trails.
Question 8 (1) - Oedometer test
What are the boundary conditions applied to a soil sample tested in an Oedometer?
Z
H
a) Pore water pressure at z = H (top of the sample) is PH = Yw. H
b) Ez = Ex
c) &z=&v (₂ is the volumetric strain of the sample)
d) At time t=0, 4p = 0
During Atterberg limit tests in the soil mechanics laboratory, the students obtained
the following results from a clayey soil.
Number of Blows (N)
Moisture Content (%)
14
38.4
16
36.5
20
33.1
28
27.0
Plastic limit tests: Students conducted two trials and found that PL = 17.2% for the first trial
and PL = 18.4% for the second trial. Assume that the liquid limit of the soil is . LL = 29.0%
a. Determine the flow index.
b. Determine the liquidity index of the soil if the in situ moisture content is 22.0%.
Chapter 4 Solutions
EBK PRINCIPLES OF GEOTECHNICAL ENGINEER
Ch. 4 - During Atterberg limit tests in the soil mechanics...Ch. 4 - Prob. 4.2PCh. 4 - Prob. 4.3PCh. 4 - Results from a liquid limit test conducted on a...Ch. 4 - The following data were obtained by conducting...Ch. 4 - Refer to the soil in Problem 4.5. Using the...Ch. 4 - Following results are obtained for a liquid limit...Ch. 4 - Prob. 4.8PCh. 4 - Prob. 4.9PCh. 4 - Prob. 4.10P
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