Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Chapter 17, Problem 7P
To determine
Liquid limit of the soil using the plot of the flow curve
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Students have asked these similar questions
The following results were obtained from a liquid
limit test on a clay using the Casagrande cup
device. The natural water content of this clay is 38%
and the plastic limit is 21%.
No. of
blows
6
12
20
28
32
Water
52.5
47.1
42.3
38.6
37.5
content
(%)
What is the liquid limit of this clay?
b. What is the plasticity index of this clay?
What is the liquidity index of this clay?
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.
1. During Atterberg limit tests in the soil mechanics laboratory, the students
obtained the following results from a clayey soil.
Liquid limit tests:
Number of
Moisture
blows, N
content (%)
14
38.4
16
36.5
20
33.1
28
270
Plastic limit tests: Students conducted two trials and found that PL = 172%
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.
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- Results from a liquid limit test conducted on a soil are given below. a. Determine the liquid limit of the soil. b. If it is known that the PI = 6.5, what would be the plastic limit of the soil? c. Determine the liquidity index of the soil if win situ = 23.8%arrow_forwardDuring Atterberg limit tests in the soil mechanics laboratory, the students obtained the following results from a clayey soil.Liquid limit tests: 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.arrow_forwardProblem 1: During Atterberg limit tests in the soil mechanics laboratory, the students obtained the following results from a clayey soil. Liquid limit tests: Number of Moisture blows, N 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 1st trial and PL = 17.8% for the second trial. Draw the flow curve and obtain the liquid limit. What is the plasticity index of the soil? (Hint: Use an average value of PL) Determine the flow index. Determine the liquidity index of the soil if the in-situ moisture content is 21%, and comment on the probable engineering behavior of this soil.arrow_forward
- Problem 1: 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 Moisture 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.arrow_forward2. Given the laboratory results of the Atterberg Limits Test in table below. You may use a chart to determine the liquid limit by plotting the Casagrande graph or you may also use ratio and proportion or calculator in determining the LL. a. Determine the nearest value to the Liquid Limit of the soil. b. Determine the nearest value to the Plastic Limit of the soil. c. Determine the nearest value to the Liquidity Index of the soil. A. Liquid Limit Test Number Cone penetration, mm Weight of Wet Soil +Container, g Weight of Dry Soil +Container, g Weight of Container, g Weight of Water, g Weight of Dry Soil, g Water Content, % B. Plastice Limit and Natural Water Content Test Number Weight of Wet Soil +Container, g Weight of Dry Soil +Container, g Weight of Container, g Weight of Water, g Weight of Dry Soil, g Water Content, % Average, % 1 3 38 20 22.47 21.29 21.27 19.44 18.78 18.75 12.74 13.24 13.2 2 29 Plastic Limit 1 2 23.2 22.8 20.42 20.19 12.9 12.95 4 14 26.12 22.1 13.27 Natural Water…arrow_forwardA constant-head permeability test is performed in a laboratory where the soil sample is 25 cm in length and 6 cm2 in cross-section. The height of the water is maintained at 2 ft at the inflow end and 6 in. at the outlet end. The quantity of water flowing through the sample is 200 ml in 2 minutes. (a) Make a sketch of the described conditions. (b) What is the coefficient of permeability? ***Please include all the units and conversions.arrow_forward
- A permeability test is conducted with a sample of soil that is 60 mm in diameter and 120 mm long. The head is kept constant at 225 mm. The flow is 1.5 mL in 6.5 min. What is the coefficient of permeability? Select the correct response: 12 m/yr 17 m/yr 23 m/yr 22 m/yrarrow_forwardA liquid limit test on a clay was performed with the following results. The natural water content of the clay is 38% and plastic limit is 21%. Number of Blows 6 12 20 28 32 Water content (%) 52.5 47.1 42.3 38.6 37.5 What is the liquidity index of this clay? (Use Interpolation) Group of answer choices 0.895 0.96 1.08 0.90 Please answer this asap. For upvote. Thanksarrow_forwardProblem Set 4 2. The following data were obtained from the liquid and plastic limit tests for a soil: Liquid Limit Test: Moisture content, w% 32.35 31.55 31.35 33.62 33.00 Number of blows, N 22 29 32 16 19.00 Plastic Limit Test: Moisture content = 20.62% 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 the soil?arrow_forward
- 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 =arrow_forward1. A series of Atterberg limit tests was performed on samples of a gray-brown silty clay. The table below summarizes the results of four liquid limit tests. Using this data, Trial Number Number of blows Weight of wet sample + container (g) Weight of dry sample + container (g) Weight of container (g) 15.61 16.82 16.34 a. Determine the flow curve for the soil (graph and show the equation of the best fit line) b. Determine the flow index for the soil 1 23 2 36 3 26 15.12 4 c. Calculate the liquid limit d. Calculate the plasticity index Plastic limit tests show an average of 38.5%. 23.50 26.94 26.86 26.27 21 19.89 22.10 22.59 21.96arrow_forwardA constant-head permeability test is performed in a laboratory where the soil sample is 25 cm in length and 6 cm2 in cross section. The height of water is maintained at 2 ft at the inflow end and 6 in. at the outlet end. The quantity of water flowing through the sample is 200 ml in 2 minutes. (a) Make a sketch of the described conditions. (b) What is the coefficient of permeability in millimeters per minute?arrow_forward
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