Q2 A: A dry sample of clay was found to have: Gs= 2.7, void ratio, LL-50%=P.L.-28% and void ratio =0.6Find: 1- S.L, dry unit weight and air content.2- minimum volume of soil when volume of soil = 200cm³ at L.L.

Answered: Image /qna-images/answer/334d4491-fbb0-4c77-aca6-dc38ba2a9716.jpg

Answered: Q2 A: A dry sample of clay was found to…

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter3: Weight-volume Relationships And Plasticity

Section: Chapter Questions

Problem 3.5P

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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 (…
soil mechanic
2. A saturated 100 cm clay sample has a natural water content of 30%. It is found that the shrinkage limit occurs when the water content is 19%. If the specific gravity of soil is 2.70, compute: a. The shrinkage ratio b. The volume of sample when the water content is 15% c. The mass of dry soil sample
The field unit weight of the soil is 1960 kg/m³ and the unit weight of the soil particle is 2700 kg/m3 . If the emax=0.69 and emin=0.44, a)Compute the void ration of the soil sample. bCompute the dry unit weight in KN/ m3 if water content is 11%. cCompute the relative density of the soil sample. A soil having a sp. Gr. of 2.74 has a moist unit weight of 20.6 KN/m3 and a moisture content of 16.6%. a Compute the void ratio. bCompute the degree of saturation. cCompute the effective unit weight. dCompute the weight of water in KN to be added per cu. m. of soil for 100% degree of saturation.
A saturated 100 cm3 clay sample has a natural water content of 30%. It is found that the shrinkage limit occurs when the water content is 19%. If the specific gravity of soil is 2.70, compute: A. The shrinkage ratio B. The volume of sample when the water content is 15% C. The mass of dry soil sample
Situation 1: Dry soil with Gs = 2.7 is mixed with water to produce 20% water content and compacted to produce a cylindrical sample of 40 mm diameter and 80mm long with 5% air content. Calculate the following: a. Mass of the mixed soil that will be required b. Void ratio of the sample c. Dry unit weight d. Moisture unit weight e. Saturated unit weight f. Amount of water to be added for full saturation.
a. The moisture content of the soil specimen is 20%, and the total weight is 300 gr. Calculate the void ratio and degree of saturation if the total volume was 180 cm3. (Gs = 2.5) 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.
1. The maximum density corresponds to (maximum/minimum). 2. An increase in the degree of saturation of a soil (increases/decreases) permeability. 3. Shortcoming of direct shear test is that it fails the soil on a designated plane which may not be the weakest one. (a) True (b) False 4. Compaction means the decrease of air voids. (a) True (b) False True 5. To determine the grain size distribution of fine-grained soil (smaller than 0.075 mm), Hydrometer test should be conducted. (a) True (b) False 6. In triaxial test, cell pressure is applied to simulate the actual field condition of the sample in the laboratory. (a) (b) False 7. Sand cone method can be used to determine the in-situ density (field density) of soil. (a) True (b) False 8. What is the particle size (diameter) distribution of clay soil? (a) Smaller than 0.002 mm (c) 0.005 mm to 2.0 mm 9. Specific gravity of clay soil ranges from (a) 2.70-2.80 (b) 2.20-2.50 10. Typically, permeability of clay soil is: void ratio. (b) (d) 0.002…
The field unit wt of the soil sample is 1960 kg/m and the unit wt of the soil particle is 2700 kg/m. If the emax %3D 0.69 and emin=.44 A. Compute the dry unit wt in KN/M³ if the water content is 11%. B. Compute the void ratio of the solid sample C. Compute the relative density of the soil sample.
Question 6
Answer 6.4
Homework 1- For a given soil, show that (1+wsat (Gs+es)Yw a- Ysat b- y = = n 1+e Wsat 2- The moist unit weight of a soil is 19.2 kN/m³. Given that G. = 2.69 and w=9.8%, determine: a. Void ratio b. Dry unit weight c. Degree of saturation Ans: e=0.51 , Ya=17.48KN/m³ , s=51.7% 3- Refer to Problem 2. Determine the weight of water, in kN. to be added per cubic meter (m°) of soil for a. 90% degree of saturation b. 100% degree of saturation Ans: Water add= 1.25 kN/m³ , 1.58 kN/m³ 4- For a given soil, the following are known: G, = 2.74, moist unit weight, y = 20.6kN/m², and moisture content, w = 16.6%. Determine: a. Dry unit weight b. Void ratio c. Porosity d. Degree of saturation Ans: Ya = 17.67 kN/m³ e=0.51 5- It is known that the natural soil at a construction site has a void ratio of 0.92. At the end of compaction, the in-place void ratio was found to be 0.65. If the moisture content remains unchanged, then determine: a. Percent decrease in the total volume of the soil due to compaction b.…

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Q2 A: A dry sample of clay was found to have: Gs= 2.7, void ratio, LL-50%= P.L.-28% and void ratio =0.6 Find: 1- S.L, dry unit weight and air content. 2- minimum volume of soil when volume of soil = 200cm³ at L.L.