MindTap Engineering for Das/Sobhan's Principles of Geotechnical Engineering, SI Edition, 9th Edition, [Instant Access], 1 term (6 months)
9th Edition
ISBN: 9781305971226
Author: Braja M. Das; Khaled Sobhan
Publisher: Cengage Learning US
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Textbook Question
Chapter 4, Problem 4.5P
The following data were obtained by conducting liquid limit and plastic limit tests on a soil collected from the site.
Liquid limit tests:
Plastic limit test: PL = 19.3%
a. Draw the flow curve and determine the liquid limit.
b. Using the Casagrande plasticity chart (Figure 4.21), determine the soil type.
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During Atterberg limit tests in the soil mechanics laboratory, the students obtained the following results from a
clayey soil.
Liquid limit test:
Number of
blows, N
Mosture
content (%)
12
35.2
19
29.5
27
25.4
37
21
Draw the flow curve and obtain the liquid limit.
• If plasticity index of the soil is 6.5 what is the plastic limit of this soil?
• Determine the flow index.
• Determine the liquidity index of the soil if the in-situ moisture content is 23.8%, and comment on the
probable engineering behavior of this soil.
Following are the results from the liquid and plastic limit tests for a soil.
Liquid limit test:
let the N1 be 20 and w1 be 30%
let N2 be 30 and w2 be 20%
let N3 be 40 and w3 be 10%
For Plastic limit test:
let w1 be 12 and let w2 be 13 and let w3 be 13.5
The liquid limit =
Plastic limit =
Plasticity Index =
The following data were obtained by conducting liquid limit and plastic limit
tests on a soil collected from the site.
Liquid limit tests:
Number of
blows, N
15
21
29
38
Moisture
content (%)
39.5
37.9
36.4
35.1
Plastic limit test: PL = 19.3%
a. Draw the flow curve and determine the liquid limit.
b. Using the Casagrande plasticity chart (Figure 4.21), determine the soil type.
Chapter 4 Solutions
MindTap Engineering for Das/Sobhan's Principles of Geotechnical Engineering, SI Edition, 9th Edition, [Instant Access], 1 term (6 months)
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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- Problem Set 4 4. The following data were obtained from the liquid and plastic limit tests for a soil: Liquid Limit Test: Number of blows (N) Molsture content (%) a) Draw the flow curve from the liquid limit test data and find the liquid limit. (use excel to graph) b) What is the plasticity index of 17 42.1 22 38.2 27 36.2 32 34.1 Plastic Limit Test: Moisture content = 21.3% the soil?arrow_forwardHomework 1-Results from liquid and plastic limit tests conducted on a soil are Moisture given below. Plastic limit tests: PL 13.4% a) Draw the flow curve and obtain the liquid limit. b) What is the plasticity index of the soil? C) Determine the liquidity index of the soil if Win situ = 32% Number of blows, N content (%) 39.2 %3D 15 34.5 22 26 31.2 29.0 %3D 29 U.S. sieve no. Mass of soil retained 1- The followiarrow_forwardRefer to the soil in Problem 4.5. Using the Casagrande plasticity chart, graphically estimate the shrinkage limit of the soil as shown in Figure 4.22. 4.5 The following data were obtained by conducting liquid limit and plastic limit tests on a soil collected from the site. Liquid limit tests: Plastic limit test: PL = 19.3% a. Draw the flow curve and determine the liquid limit. b. Using the Casagrande plasticity chart (Figure 4.21), determine the soil type.arrow_forward
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