Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Question
Chapter 2, Problem 2.2P
To determine
Calculate the uniformity coefficient
State is it a well-graded or a poorly-graded soil.
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Problem 2.1: The following values for a sand are given: D10 = 0.3 mm, D30 = 0.41 mm, and D60 = 0.77 mm.Determine Cu and Cc, and state if it is a well-graded or a poorly-graded soil.
The maximum and minimum unit weights of a granular soil are 117.1 lb/ft3 and 91.0 lb/ft3, respectively. Gs 5 2.65. What would be the relative density of the same sand compacted to a void ratio of 0.625?
Subject: Soil Mechanics
Please provide a solution and a diagram
If a representative clay specimen 20 mm thick, under double drainage, took 121 minutes for 90% primary compression, estimate the time in days required for 50% primary compression of a field layer 2 m thick, bounded by impervious boundary at the bottom and sand at the top.
a. 725
b. 679
c. 650
d. 781
Chapter 2 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
Ch. 2 - For a gravel with D60 = 0.48 mm, D30 = 0.25 mm,...Ch. 2 - Prob. 2.2PCh. 2 - Prob. 2.3PCh. 2 - The following are the results of a sieve analysis....Ch. 2 - Repeat Problem 2.4 with the following data. 2.4...Ch. 2 - Repeat Problem 2.4 with the following data. 2.4...Ch. 2 - Repeat Problem 2.4 with the following data. 2.4...Ch. 2 - The following are the results of a sieve and...Ch. 2 - Repeat Problem 2.8 using the following data. 2.8...Ch. 2 - Repeat Problem 2.8 using the following data. 2.8...
Ch. 2 - The grain-size characteristics of a soil are given...Ch. 2 - Repeat Problem 2.11 with the following data. 2.11...Ch. 2 - Repeat Problem 2.11 with the following data. 2.11...Ch. 2 - A hydrometer test has the following result: Gs =...Ch. 2 - Repeat Problem 2.14 with the following values: Gs...Ch. 2 - Three groups of students from the Geotechnical...Ch. 2 - Refer to Problem 2.C.1. Results of the sieve...
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- In AASHTO, which group are the following soil likely to fail into? a. A well-graded gravel with approximately 10% fines b. A well-graded sand with approximately 10% fines c. A uniform fine sand d. A high plastic clayarrow_forwardHow is the plasticity index of a soil determined?arrow_forwardA sand-cone in place unit test was conducted on the field during the construction of a proposed embankment. The following data were obtained. moisture content=12.8% weight of sand to fill the funnel=320 g weight of wet soil from test hole=750 g unit weight of sand=15.4 kN/m3 weight of sand used to fill test hole and funnel of sand-cone device=870 g a) compute the wet unit weight of soil (Ans. 21.14 kN/m3) b) compute the dry unit weight of the compacted soil (Ans. 18.74 kN/m3) c) compute the relative compaction in the field if the maximum dry unit weight of the soil is 21.3 kN/m3. (Ans. 87.98%)arrow_forward
- find 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_forwardSituation 4 - Three samples of loose sand were tested under consolidated undrained (CU) conditions. Test results are given below:Undrained angle of friction = 35°Deviator Stress = 260 kPaPore Water Pressure = 30 kPaDetermine the drained angle of friction in degrees. Round off to three decimal places.arrow_forwardCalculate % Clay using the following values; a. Weight of soil= 50 g b. HR reading at 40 sec.= 25 c. Temp at 40 sec= 25 oC d. HR at 2 hrs= 16 e. Temp at 2 hrs= 26arrow_forward
- 9. The degree of compaction of a type of sand in the field is 93.5%. considering Yd max =16.98 kN/m3 and Yd min = 14.46 kN/m3, what is the field dry specific gravity and relative compaction compactness?arrow_forwarda completely dry sand sample fills a 200 cm 3 metal cylinder and weighs 260 g (Ws), having Ss = 2.6 Calculate e(void ratio), then complete the schematic. (see the picture). I WILL RATE IT.arrow_forwardCalculate the coefficient of gradation, Cc. ? Classify the soil by AASHTO and USCS system. (LL = 30, PL = 10) ? Use this given M=Mass of soil retained in pan +∑Mass reatianed in each sieve⇒M=617 gM=Mass of soil retained in pan +∑Mass reatianed in each sieve⇒M=617 g Sieve No. Opening Size (mm) Mass retained (g) %Mass retained=MiM×100=MiM×100 %Cumulative mass retained % Finer 4 4.750 28 =28617×100%=4.54%=28617×100%=4.54% 4.54 95.46 10 2.0 42 =42617×100%=6.81%=42617×100%=6.81% 11.35 88.65 20 0.850 48 =48617×100%=7.78%=48617×100%=7.78% 19.13 80.87 40 0.425 128 =128617×100%=20.74%=128617×100%=20.74% 39.87 60.13 60 0.250 221 =221617×100%=35.82%=221617×100%=35.82% 75.69 24.31 100 0.150 86 =86617×100%=13.94%=86617×100%=13.94% 89.63 10.37 200 0.075 40 =40617×100%=6.48%=40617×100%=6.48% 96.11 3.89 Pan 24 =24617×100%=3.89%=24617×100%=3.89% 100 0 Now, to plot the GSD curve, the % finer is kept on the vertical axis and the opening size are kept on the horizontal axis -…arrow_forward
- Q 05: (CLO 3) For a given soil, the following are given in Table: Specific Gravity Gs, bulk unit weight γ), and moisture content (w). Use data from the table according to your registration number. (You can solve answer on paper and paste neat clear image in the answer). Student Registration Number Gs γ (kN/m3) moisture content (w) % 102 2.72 17.2 20 Determine: Dry unit weight Void ratio Porosity Degree of saturationarrow_forwardThree samples of loose sand were tested under consolidated undrained (CU) conditions. The failure stress and excess pore water pressure for the soil sample is given below. Cell Pressure - 206 kPa Deviators Stress - 122 kPa Pore Water Pressure - 82 kPa Determine the drained angle of inclination of failure plane in degrees. Use stored value. Asnwer in 5 decimal places.arrow_forward1.Three phases of a soil element? 2.Define volumetric relations (equation and text):e= , n=, S= 3. Define weight relations (equationand text):w=, Y= , Gs= 4. Range of values for degree of saturation? 5. Range of values for moisture content? 6. Correlation between dry unit weight and total unit weight (use w)? 7.Super equation (label each term)? 8. Unit weight of water ( English,metric)? 9. Average unit weight for medium dense sand? 10.Specific gravity for sand?arrow_forward
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