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 4, Problem 4.10P
To determine
Find the shrinkage limit and shrinkage ratio.
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A sample of moist sand taken from the field was found to
have a moisture content of 14% and a porosity of 38%. In
the laboratory test that simulates field conditions, it was
found that at its densest state, its void ratio is 85% and at
its loosest state its void ratio is 40%. Determine the void
ratio.
Select one:
O a. 0.42
b. 0.61
c. 0.79
d. 0.57
It is the densification of soil by removal of air which
require mechanical energy.
Select one:
a. solidification
b. consolidation
C. compression
d. compaction
What particular sand is ideal for field density test using
sand cone method?
Select one:
O a. clean sand
b. Ottawa sand
c. Owatta sand
d. white sand
A sample of moist sand taken from the field was found to have a moisture content of 14% and a porosity of 38%. In the laboratory test that simulates field conditions, it was found that at its densest state, its void ratio is 85% and at its loosest state its void ratio is 40%. Determine the void ratio.
Select one:
a. 0.79
b. 0.57
c. 0.61
d. 0.42
A clean sandstone core sample with diameter of 3.8 cm and length of 5.6 cm is saturated with
a brine. The core was desaturated in several steps, and the resistance was measured at each
saturation. The results are as follows:
Water Saturation (Fraction) Resistance (k2)
1.000
1.302
0.900
1.695
0.800
2.283
0.730
2.878
0.640
3.775
0.560
5.637
0.480
7.838
0.375
13.175
0.350
17.050
0.300
26
Brine resistivity= 0.74 Qm
Archie coefficient =1.03
Cementation factor= 2.2147
(1) Estimate the rock porosity.
(2) Determine the saturation exponent.
(3) Estimate the amount of oil and brine (in cc) in the core sample when resistivity index is 5.
All steps of the calculations should be shown.
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
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- A sample of silty sand in its natural conditions had a volume of 120cm3 and weighed 149g. After saturating the sample with water, it weighed 188g. The sample was then drained by gravity until it reached a constant weight of 133g. Finally the sample was oven dried for 2 days at 221 degrees fahrenheit after which it weighed 120 g. Note that the volume of the voids in the sample under natural conditions is the volume of water in the sample at saturation. Assuming that the density of water is 1 g/cc. Perform the following calculations: a) Water content on a mass basis under natural conditions b) Specificyield c) Specific retention d) Totalporevolume e) Porosity under natural conditionsarrow_forwardHomarrow_forwardThe following results were obtained by testing a sample of clay: water content 25.6%, liquid limit 43.5%, plastic limit 19.1%. From this compute the following: (a) Liquidity Index (b) Plasticity Index (c) Shrinkage Limitarrow_forward
- The dry unit weight of a sand sample in the loosest state is 13.34 kN and in the densest state, it is 21.19 kN. Its grain specific gravity is 270 and has a porosity of 33% P.S. Sorry for the question can’t fully grasp what was writtenarrow_forward3- Following are the results of a laboratory consolidation test on a sample of undisturbed clay obtained from the field. Final height of specimen (in) Pressure, o' (lb/ft') 1 0.9917 1,000 2,000 4,000 0.9843 0.956 0.9142 8,000 0.8685 16,000 0.8228 32.000 The height of the specimen at the beginning of the test was 1.0 inch, and the diameter was 2.5 inches. The moist specimen weighed 0.31 lb and the water content was determined to be 19%. Estimate the compression index and the preconsolidation pressure from the e-log o' curve. (Plot in Excel) Given: Gs = 2.7.arrow_forwardSaturated clay has a volume of 18.9 cm^3 and a mass of 30.2 gm. On oven drying the mass reduces to 18 gm. The volume of dry specimen as determined by displacement of mercury is 9.9 cm^3. Determine the 1. shrinkage limit 2. specific gravity 3. shrinkage ratioarrow_forward
- During a consolidation test, an increment pressure of 153 kN/m2 was applied to a sample of saturated clay initially 20 mm thick. When equilibrium was reached the thickness of the sample was reduced to 18.3 mm. The pressure was then removed and the sample was allowed to expand. The final thickness was recorded as 19.3 mm and the final moisture content was 30.1%. If the specific gravity of the particles is 2.65 and the sample was saturated throughout the test, determine the following: 8.1 Voids ratio before and after consolidation. 8.2 The average coefficient of volume change over the range of pressure appliedarrow_forwardA liquid limit test on a clay was performed with the following results. The natural water content of the clay is 38% and plastic limit is 21%. Number of Blows 6 12 20 28 32 Water content (%) 52.5 47.1 42.3 38.6 37.5 What is the plasticity index of this clay? (Use Interpolation) Group of answer choices 15.74% 18.99% 18.85% 17.63% Please answer this asap for upvote. thanksarrow_forwardA sample of clay was coated with paraffin wax and its mass, including the mass of wax, was found to be 697.5g. The sample was immersed in water and the volume of the water displaced was found to be 355 mL. The mass of the sample without the wax was 690g and the water content of the representative specimen was 18%. If specific gravity of soil solids and the wax is 2.7 and 0.89 respectively, solve for the degree of saturation.arrow_forward
- An undisturbed sample of saturated clay has a volume of 16.5 cm3 and weighs 35.1 g. On oven drying, the weight of the sample reduces to 29.5 g. Determine the porosity in percentarrow_forwardi need the answer quicklyarrow_forward7. The following data was obtained from laboratory tests for a cohesive specimen: moisture content, w, was 22.5%; G=2.60; and to determine the approximate unit weight, a sample having a mass of 224.0 g was placed in 500 cm³ container with 382 cm³ of water required to fill the container. a. What is the Total Unit Weight of the soil sample in kN/m³? b. What is the Dry Unit Weight of the soil sample in kN/m³ ? c. What is the void ratio?arrow_forward
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