Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Question
Chapter 4, Problem 4.3P
(a)
To determine
Find the flow index for the soil.
(b)
To determine
Find the liquidity index of the soil.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
In a constant head permeability test, a soil sample is compacted into a round PVC pipe and placed into a tank as shown. After sufficient time is allowed for saturation of the soil, the test is conducted under standard temperature pressure conditions for 4 hours. A total of 227 g of water is decanted into a measuring vessel during the test. What is the coefficient of permeability of the soil?
An undisturbed soil sample was prepared for a triaxial testing. The cylindrical soil sample is 50 mm in diameter and 100 mm long. It has a mass of 360 g. After finding the mass of the entire sample, a small portion was removed and a moisture content test was performed on it. The result of the moisture content test is shown in Table 3(a). Given the specific gravity, G, is 2.70.
(i) Compute the moisture content (%) of the soil sample.
(ii) By using the soil phase diagram, determine the bulk density (kg/m³), dry density (kg/m³), void ratio, porosity (%) and degree of saturation (%) of the soil sample.
A constant head permeability test was performed on a 40 cm² (cross sectional area) soil sample. The length of the sample was 5 cm, and a 20 cm head difference was applied during testing. If 10 cm³ of water was collected over 60 sec, calculate the coefficient of permeability of the soil.
(b) In a falling head permeability test, the head fell from 52 to 25 cm, in 3 minutes. The cross-sectional area of the soil sample is 80 cm²,and the length was 8 cm. If the area of the standpipe was 0.5 cm², compute the coefficient of permeability of the soil.
Chapter 4 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
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
Knowledge Booster
Similar questions
- In a constant head permeability test in the laboratory as shown in Figure Q2(e), the data is recorded in Table Q2(b). The void ratio of the soil specimen is 0.46. Determine; (i) Hydraulic conductivity, k, of the soil in cm/sec. (ii) Discharge velocity in cm/sec.arrow_forwardA falling head permeability test is conducted on silty soil. The sample diameter is 10.0 cm and its length or thickness is 6 cm. The diameter of the standpipe is 6.0 mm. The head at the start of the test is 58 cm. The test lasts 9 min and the head falls to 38 cm. Find the coefficient of permeability of this soil. The answer must be in 6 decimal places. Use units cm/sec.arrow_forwardA liquid limit test carried out on a sample of inorganic soil taken from below the water table gave the following results. Fall cone penetration: 15.5, 18.2,21.4, 23.6 and; moisture content: 34.6, 40.8, 48.2, 53.4. determine LL,PL,PIarrow_forward
- Following are the results from the liquid and plastic limit tests for a soil. Liquid limit test: Plastic limit test: PL = 18.7%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 when the in situmoisture content is 26%arrow_forwardIn an experiment, a soil is dug out from the ground, weighed, then oven dried, and then saturated with water. The weight of soil taken from the test hole is 1539 grams. The oven dried weight was 1163 grams. After saturating, it weighed 1632 grams. The volume of the test hole is found to be 1042cc. Determine the following: a. Void ratio. b. Specific gravity of the soil solids. c. Degree of saturation, %.arrow_forwardProblem # 1. A constant head permeability test is performed on a sample of granular soil. The length of the soil sample is 15 cm and the cross-sectional area is 10 cm^2. If a 24 cm^3 volume of water passes through the oil sample in a 3-minute period and the constant head is 30 cm determine the followinga. Determine the coefficient of permeability of the soil.b. Find the discharge velocity.c. Compute the seepage velocity if the void ratio is 0.64.arrow_forward
- b. A soil layer with a moisture content of 10 percent and a unit weight of 16.5 KN per cubic meter has a decrease in volume by 10 percent after compaction. Find the dry specific weight of the soil. Please solve question (b) I have the answer of Question (a)if you need information please use the question a. given data: a. The moisture content of the soil specimen is 20%, and the total weight is 300 gr. Calculate thevoid ratio and degree of saturation if the total volume was 180 cm3. (Gs = 2.5)arrow_forwardA granular soil sample taken from the field has a density of 1900 kg/m3. In a laboratory test, it was found out that the density of the soil solids is 2600 kg/m3, moisture content of 11.5% and void ratios at its densest and loosest states are 0.43 and 0.62, respectively. Determine the following: a. In-situ dry density of the soil, kg/m3. b In-situ void ratio. c. Relative density, %.arrow_forwardThe permeability test must be carried out on a soil sample 15 cm long and 8 cm in diameter using the permeameter illustrated below. What is the difference between a variable head permeameter and a constant head permeameter?What is the disadvantage of using the constant head permeameter for all soil types? Which pemeameter is it in the illustration below? Justify your answer.How to calculate the permeability coefficient when the pressure drop is maintained at 30 cm and it takes 2 min and 35 s to collect a volume of water of 200 ml? Is it possible to identify the soil from this result? If so, what soil is it?arrow_forward
- During 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_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
arrow_back_ios
arrow_forward_ios
Recommended textbooks for you
Principles of Geotechnical Engineering (MindTap C...Civil EngineeringISBN:9781305970939Author:Braja M. Das, Khaled SobhanPublisher:Cengage Learning
Fundamentals of Geotechnical Engineering (MindTap...Civil EngineeringISBN:9781305635180Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage Learning
Traffic and Highway EngineeringCivil EngineeringISBN:9781305156241Author:Garber, Nicholas J.Publisher:Cengage Learning
Principles of Geotechnical Engineering (MindTap C...
Civil Engineering
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
Publisher:Cengage Learning
Fundamentals of Geotechnical Engineering (MindTap...
Civil Engineering
ISBN:9781305635180
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Cengage Learning
Traffic and Highway Engineering
Civil Engineering
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Cengage Learning