Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Chapter 5, Problem 5.10P
To determine
Classify the soil according to the Unified soil classification system and provide group symbol and group name.
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Let us assume that a soil sample taken in the field is taken and it must be identified by the SUCS Method and AASHTO Method.
Moisture content = 5.75%
Limit liquid = 53.5
Plastic limit = 31.6
Granulometry
Sieve % Pass
No. 4 100
# 40 68
# 200 54.3
Do you select the best answer?
a) Inorganic silt and sand, with low plasticity
b) Inorganic clay with low plasticity
c) Clay silt, traces of gravel, dark Brown
(c) A sample of clay having a mass of 675 gm was coated with paraffin wax. The combined mass of the
clay and the wax was found to be 682 gm. The volume was found by immersion in water as 345 ml.
The sample was then broken to open. The water content and specific gravity of solids were found to
be 15 % and 2.70 respectively. Calculate the bulk density of soil, its void ratio, and degree of
saturation. Take specific gravity of wax as 0.89.
a soil sample was determined to have a water
content of 8% and a degree of saturation of 42%.
After adding some water, the degree of saturation
was altered to 53%. take the specific gravity of the
soil solids to be 2.7. assuming no change in the
volume of the voids, determine the following
A. void ratio
B. water content%
C. bulk specific gravity of the mass of the sample in
the altered state.
Chapter 5 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
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- B. ( A Soil Specimen has the following characteristics: % passing No.4 sieve = 85 % passing No.200 sieve = 11 D60 = 2 mm D30 = 0.35 mm D10 = 70 μm L.L = 36% P.L = 31% D8 = 2 μm 1. Classify the specimen according to the Unified Soil Classification System (USCS). Assign the group name and the group symbol. 2. Determine the soil activity. 3. Determine the soil Liquidity index and consistency index if we = 26%. Jarrow_forwardU B. ( A Soil Specimen has the following characteristics: % passing No.4 sieve = 85 % passing No.200 sieve = 11 D60 = 2 mm D30 = 0.35 mm D₁0 = 70 μm L.L = 36% P.L = 31% D8 = 2 µm 1. Classify the specimen according to the Unified Soil Classification System (USCS). Assign the group name and the group symbol. 2. Determine the soil activity. 3. Determine the soil Liquidity index and consistency index if we = 26%.arrow_forward1- For a soil, suppose that Dio = 0.08 mm, D3o = 0.22 mm, and Dso = 0.41 mm. Calculate the uniformity coefficient and the coefficient of gradation. 2- The following are the results of a sieve analysis: U.S. sieve no. Mass of soil retained (g) 4 10 18.5 20 53.2 40 90.5 60 81.8 100 92.2 200 58.5 Pan 26.5 a. Determine the percent finer than each sieve and plot a grain-size distribution curve. b. Determine Dio, D30, and D6o from the grain-size distribution curve. c. Calculate the uniformity coefficient, Cu. d. Calculate the coefficient of gradation, Cc.arrow_forward
- A soil sample is subjected to laboratory sieve analysis using a complete set of standard IS sieves. Out of 2 kg of soil used in the test, 800 gram was retained on IS 600 micron sieve, 1000 gram was retained on IS 500 micron sieve and the remaining 200 gram was retained on IS 425 micron sieve. The uniformity co-efficient for the soil is: 1.1.2 X2. 0.833 X3. 1.412 X4.0.71 Сол Дво Dio Que Chosarrow_forwardfind the following: a. What is the value of the percent passing for sieve with 2 mm. opening in percentage? b. What is the value of the percent passing for sieve with 150 μm. opening in percentage? c. What is the value of the Effective Size of soil in mm.? d. What is the value of the coefficient of gradation?e.What is the value of the coefficient of uniformity? f. What are the percentages of gravel, sand, and Fines using the limits indicated by USCS? g. What are the percentages of gravel, sand, silt and clay using the limits indicated by MIT? h. What are the percentages of gravel, sand, silt and clay using the limits indicated by AASHTO? i. What are the percentages of gravel, sand, silt and clay using the limits indicated by USDA?arrow_forwardSr B. ( A Soil Specimen has the following characteristics: % passing No.4 sieve = 85 % passing No.200 sieve = 11 D60 = 2 mm D30=0.35 mm D₁0 = 70 μm D8=2 μm L.L = 36% P.L = 31% 1. Classify the specimen according to the Unified Soil Classification System (USCS). Assign the group name and the group symbol. 2. Determine the soil activity. 3. Determine the soil Liquidity index and consistency index if wc = 26%.arrow_forward
- GEOTECHNICAL ENGINEERING A soil sample is oven-dried from its liquid limit state to its dry state causing a volume change of 19.68% of the dry volume. Likewise, the same soil is oven-dried from its plastic limit state to its dry state causing a volume change of 8% of the dry volume. The liquid limit and plastic limit are 60.54% and 50.37%, respectively. Determine the specific gravity of soil solids, shrinkage limit and shrinkage ratio.arrow_forwardA soil is mixed at a water content of 16% and compacted in a 1000 ml cylindrical mold. The sample extruded from the mold has a mass of 1620 g, and the specific gravity of the soil grains is 2.69. Find the following: a. void ratio, b. degree of saturation, and c. dry unit weight of the compacted sample. d. If the sample is soaked in water at the same void ratio, what would be the new water content?arrow_forwardPROBLEM No. 6 Atterberg Limit From the laboratory results of the Atterberg Limit Test, the Liquid Limit of the soil is 65% and the Plastic Limit of the soil is 40%. a. Determine the Plasticity Index. b. If the in-situ moisture content of the soil is 85%, determine the Liquidity Index of the soil. c. Determine the state of consistency of the in-situ soil. d. Determine the Consistency Index of the soil.arrow_forward
- A sample of soil was tested in the laboratory, and the test results were listed as follows. Classify the soil by Unified Soil Classification System. 1. Liquid limit = 29%. 2. Plastic limit = 19%. 3. Mechanical grain-size analysis:arrow_forwardb. Compute the plastic limit. C. Compute the natural water content. d. Compute the plasticity index. e. Compute the liquidity index. f. Compute the consistency index. PROBLEM NO. 4 From the table shows a summary of a liquid limit and plastic limit test. LIQUID LIMIT TEST Soil Wt. of wet Wt. of dry Water No. of Sample Soil (kg) Soil (kg) A. Content Blows 9.5 6.7 28 B 7.95 5.54 20 8.21 5.69 18 D. 12.85 8.83 13 PLASTIC LIMIT TEST Wt. of Dry Soil(kg) Soil Wt, of Wet Sample Soil(kg) 9.05 7.35 2 8.66 7.01 Natural Water Content Scil Wt. of Wt. of Sample Wet Soil Dry Soi! 1 9.69 7.0 9.47 6.86 a. Compute the liquid limit. b. Compute the plastic limit. C. Compute the natural water content. d. Compute the plasticity index. e. Compute the liquidity index GEOTECHNICAL ENGINEERING 1arrow_forward05: The Figure below represents the data that was obtained from a liquid-limit test on a soil. 50 percent of its particles is passing sieve #200. Two determinations for the plastic limit gave water contents of 20.3 % and 20.8 %. Determine 1- Liquid Limit (LL). 2- Plasticity index. 3- Liquidity index if the water content is 27.4% 4- Void ratio at the liquid limit, if G, 2.7 5- Classify the soil based on AASHTO system. 30 10 20 40 60 80 100 Penetration, d (mm) Moisture content, w ()arrow_forward
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