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 3, Problem 3.3CTP
(a)
To determine
Plot the variation of dry unit weight with the volume percent of finer soil for each median grain size ratio.
(b)
To determine
Provide the role of
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A soil specimen has a total volume of 70 cm3 and a total mass of 135.5g. After complete drying in an oven, the specimen has a mass of 122.0g. The Gs is 2.60. Determine the void ratio.
Report your answer to three significant figures, and draw the full phase diagram.
Discuss your results and compare your results with any published data. For the bulk density test, obtain the value of dry density. How does the values of (i) void ratio (ii) porosity influenced your results? How will these values differ if the soil is fully saturated, partially saturated or submerged? Support your assertions using relevant phase relationship equations. Whatwill happen to the values of particle density (specific gravity) obtained if the soil sample contain large quantities of peat or organic material? How will the results be used in specific practical conditions in the construction industry? Explain any source(s) of error in your experiment and state how it affected your result.
PLS. ANSWER ASAP WITH COMPLETE SOLUTION4 DECIMAL PLACES
A saturated sample of clay with a shrinkage limit of 22 has a natural water content of 35%.a. What would its dry volume be as a percentage of its original volume if the specific gravity of soil solids is 2.70?b. What would be the void ratio of the soil in its natural water content?c. What is the dry density of the soil sample?
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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- Refer to Problem 2.C.1. Results of the sieve analysis for Soils A, B, and C are given below. To obtain a more representative sample for further geotechnical testing, a ternary blend is created by uniformly mixing 8000 kg of each soil. Answer the following questions. a. If a sieve analysis is conducted on the mixture using the same set of sieves as shown above, compute the mass retained (as a percentage) and cumulative percent passing in each sieve. b. What would be the uniformity coefficient (Cu) and the coefficient of gradation (Cc) of the mixture?arrow_forwardAn oven dry sand mass with a dry unit weight of 105pcf and Gs of 2.70 is placed outdoors in a container. Overnight, it rains. As it rains, the total volume of the soil specimen within the container remains the same, yet the S increases to 55% by the time the rain is over for the night. a. Determine the new total unit weight of the soil after the rain in units of pcf. Express your answer in four significant figures. Show full phase diagram.arrow_forwardA 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 the soil is 2.70, compute the shrinkage ratio, the volume of the sample when the water content is 15% and the mass of the dry soilarrow_forward
- Results from shrinkage limit test are given below; 1. Initial volume of soil in a saturated state= 25.6 cm^3 2. Final volme of soil in a dry state= 16.9 cm^3 3. Initial mass in a saturated state = 40 gm 4. Final mass of in dry state= 30.1 gm Based on the results find out shrinkage limit, shrinkage ratio, specific gravity and volumetric shrinkage(%)arrow_forwardA150-cm3 sample of wet soil has a mass of 250 g when 100 % saturated. When oven-dried, the mass is 162 g. Calculate the dry density, dry unit weight, water content, void ratio, and Gs.arrow_forwardIn a partially saturated soil, the moisture content W% is 66.67%, the relative specific gravity of solids Ss is 2.5, and the saturated specific gravity of the sample is 1.45 g/cm3. If the volume of air is equal to 8 cm3. Determine the other quantities of the scheme, and calculate: e, n, Gw%, Ym, Yd, Ysat, Y'. Note: Kindly answer all with clear calculations.arrow_forward
- Can you please help with this: Consider a soil contaminated with gasoline (specific gravity=0.9) with the following characteristics: density of the soil (rho s) = 2.67 Mg/m3, w (water content) =30%, volume of the gasoline is 15% of the volume of the water, and 75% of the void space is filled with gasoline and water. You can assume that Vs = 1 m3 or you can assume Vt = 1 ft3 but not both assumptions. Complete the phase diagram in the figure below Find the void ratio and porosity of the specimen Find the total and dry density of the specimenarrow_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_forwardA clay soil is found to have a liquid limit of 75 percent, a plastic limit of 45 percent, and a shrinkage limit of 25 percent. If a sample of this soil has a total volume of 30 cm3 at the liquid limit and a volume of 16.7 cm3 at the shrinkage limit, what is the specific gravity of the soil solids?arrow_forward
- A soil borrow material in its natural state in the ground has a unit weight of 120 pcf. When a sample of this soil is dried in the laboratory, its dry unit weight is 103 pcf. What is the water content of this borrow material?arrow_forwardYou are checking a field-compacted layer of soil. The laboratory control curve has the following values: gd (kN/m3) w (%) 16.34 14 16.57 16 16.65 18 16.50 20 16.26 22 15.87 24 The specification for compaction states that the field-compacted soil must be at least 95% of the maximum control density and within of the optimum moisture for the control curve. You dig a hole 1m3 in the compacted layer and extract a sample that weighs 17.2 kN wet and 14.1 kN dry. (a) What is the compacted gd? The compaction w? The percent compaction? Does the sample meet the specifications? (b) If the specific gravity is 2.68, what is the compacted degree of saturation? If the sample were saturated at constant density, what would be the water content?arrow_forwardA 2850 g and 2380 g mass for wet and dry soil were obtained respectively during the conduct of moisture relation test on an aggregate base coarse materials. What is the wet density of the soil materials when a 0.000943cum volume of mold is used? From the above laboratory data, what will be the dry density of the soil Aggregate base materials?arrow_forward
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