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 3, Problem 3.8P
(a)
To determine
Calculate the void ratio of soil.
(b)
To determine
Calculate the moist unit weight of soil.
(c)
To determine
Calculate the degree of saturation.
(d)
To determine
Calculate the saturated unit weight of soil.
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1. (i) A dry soil has a void ratio of 0.65 and its grain specific gravity is = 2.80. What is its unit weight?(ii) Water is added to the sample so that its degree of saturation is 60% without any change in void ratio. Determine the water content and unit weight.(iii) The sample is next placed below water. Determine the true unit weight (not considering buoyancy) if the degree of saturation is 95% and 100% respectively.
2. A sample of saturated soil has a water content of 35%. The specific gravity of solids is 2.65. Determine its void ratio, porosity, saturated unit weight and dry unit weight
3. For a given soil, the void ratio e, water content w, and specific gravity Gs are found to be 0.50, 15%, and 2.65, respectively. Find:
(a) Total unit weight of the soil γt (b) Degree of saturation S (c) Dry unit weight γd if the water in the void is removed
4. A shrinkage limit test for a saturated specimen had the initial volume Vi = 21.35 cm3 and initial weight Wi = 37 gf (…
6. The dry unit weight of a soil sample is 14.8 kN/m. Given that G, = 2.72 and
w = 17%, determine:
a. Void ratio
b. Moist unit weight
c. Degree of saturation
d. Unit weight when the sample is fully saturated
Determine the mass of water (in kg) to be added per cubic meter (m') of soil for
90% degree of saturation
100% degree of saturation
Problem #1.
A soil sample in its natural state has a weight of 5.05 lb and a volume of
0.041 ft3. In an oven-dried state, the dry weight of the sample is 4.49 Ib.
The specific gravity of the solids is 2.68. Determine:
a. total unit weight
b. water content
C. void ratio
d. porosity
e. degree of saturation
Chapter 3 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
Ch. 3 - Prob. 3.1PCh. 3 - Prob. 3.2PCh. 3 - Prob. 3.3PCh. 3 - Prob. 3.4PCh. 3 - Prob. 3.5PCh. 3 - Prob. 3.6PCh. 3 - Prob. 3.7PCh. 3 - Prob. 3.8PCh. 3 - Prob. 3.9PCh. 3 - Prob. 3.10P
Ch. 3 - Prob. 3.11PCh. 3 - Prob. 3.12PCh. 3 - Prob. 3.13PCh. 3 - Prob. 3.14PCh. 3 - Prob. 3.15PCh. 3 - Prob. 3.16PCh. 3 - Prob. 3.17PCh. 3 - Prob. 3.18PCh. 3 - Prob. 3.19PCh. 3 - Prob. 3.20PCh. 3 - Prob. 3.21PCh. 3 - Prob. 3.22PCh. 3 - Prob. 3.23PCh. 3 - Prob. 3.24PCh. 3 - For a given sandy soil, emax = 0.75 and emin =...Ch. 3 - For a given sandy soil, the maximum and minimum...Ch. 3 - Prob. 3.27PCh. 3 - Prob. 3.28PCh. 3 - Prob. 3.29PCh. 3 - Prob. 3.1CTPCh. 3 - Prob. 3.2CTPCh. 3 - Prob. 3.3CTP
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- The dry unit weight of a soil sample is 14.8 kN/m3. Given that Gs = 2.72 and w = 17%,determine:a. Void ratiob. Moist unit weightc. Degree of saturationd. Unit weight when the sample is fully saturatearrow_forwardThe total volume of a soil specimen is 80,000 mm^3 and has a mass of 152 g. the dry mass of the specimen is 122g, and the density of the soil is 2.65 Mg/m^3. Compute the following index properties: (a) e; (b) n; (c) S; (d) ρt; and (e) ρd. Include phase diagrams.arrow_forwardPROBLEM 5: Laboratory test shows that a soil sample has emax = 0.85 and emin = 0.55. If the porosity of the sample is 43%, compute the density index. a. 26% C. 45% b. 32% d. 28%arrow_forward
- Asaparrow_forwardA soil sample has a unit weight of 1.9 g/cc and w=12%. If Gs of solids is 2.65, determine the porosity in percent.arrow_forwardProblem 1 A sample of clay is brought back from the field and trimmed to a cylinder of the following dimensions: height = 600 mm, diameter = 150 mm. It weighs 200 N. The water content has been determined to be 12%. Assume a specific gravity of G = 2.7 for the soil particle, find the following parameters for the clay: a. Dry unit weight, Natural moist unit weight, Void ratio,Degree of saturation b. Volume of water to be added to increase the water content to 18% c. The mass of water to be added into this soil sample for full saturationarrow_forward
- A WET OF SOIL SAMPLE HAS A VOLUME OF 4.85 x 10^-4 m3 AND WEIGHS 8.5N. AFTER OVEN DRYING, THE WEIGHT REDUCES TO 7.5N. IF sg = 2.7, DETERMINE THE UNIT WEIGHT * DETERMINE THE MOISTURE CONTENT * DETERMINE THE DEGREE OF SATURATION *arrow_forward1. From the following data of a soil sample: Sample size 3.81 cm dia. x 7.62 cm ht. Wet weight = 1.668 N Oven-dry weight = 1.400 N Specific gravity = 2.70 Detemine the water content (%), dry unit weight (kN/m3), bulk unit weight (kN/m3), void ratio, and the degree of saturation (%).arrow_forward9. The field unit weight of the soil sample is 1960 kg/m³, and the unit weight of the soil particle is 2700 kg/m³. If emax=0.69 and emin = 0.44. a) Compute the dry unit weight if the water content is 11% b) Compute the void ratio of the soil sample. c) Compute the relative density of the soil sample.arrow_forward
- Permeability tests were performed on a soil sample, under different void ratio and different temperatures and the following results were obtained. Test No. 1 2 Void ratio Temperature °C (e) 0.65 1.02 25° 40⁰ Estimate the coefficient of permeability at a temperature of 20°C for a voids ratio of 0.80. Given the following physical properties of water: At 20°C, n = 10.09 × 10+ and p„ = 0.998 g/cm³ At 25°C, n = 8.95 × 104 g sec/cm² and p k(cm/s) 0.4x10 1.9x10¹ At 40° C, n = 6.54 × 10 g sec/cm² and p 8 0.997 g/cm³ = 0.992 g/cm³arrow_forwardA SOIL SAMPLE WAS TAKEN FROM A SITE AND WAS PLACED IN A CUBICAL CONTAINER WITH ONE SIDE EQUAL TO 0.1m. THE NET WEIGHT OF THE SOIL IS FOUND OUT TO BE 2kN. AFTER OVEN DRYING, THE WEIGHT WAS REDUCED TO 53%. WHAT IS THE UNIT WEIGHT OF THE SOIL AFTER DRYING? * Your answer A SATURATED SOIL HAS VOID RATIO EQUAL TO 0.65 AND sg = 2.9. WHAT IS THE SUBMERGED UNIT WEIGHT OF THE SOIL? * Your answer THE WEIGHT OF THE VOIDS OF ON SITE SOIL WAS MEASURED AND FOUND OUT TO BE 1 kN. AFTER DRYING, THE WEIGHT OF THE SOLID WAS FOUND TO BE 1 kN. IF THE VOLUME OF THE SOIL IS 0.099 m3, WHAT IS THE NATURAL UNIT WEIGHT OF THE SOIL? * Your answerarrow_forwardA soil sample has a volume of 5200 cm3 and mass of 10.4 kg. water content of the soil is w = 12%. Determine(a) unit weight, (b) dry unit weight, (c) saturated unit weight, (d) void ratio, (e) porosity, and (f) degree ofsaturation (assume Gs = 2.7).arrow_forward
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