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 3.29P
To determine
Calculate the dry unit weight of the compacted sub-base.
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In a highway project, the granular sub-base layer is compacted to a moist unitweight of 19.16 kN/m3 at a moisture content of 16%. What is the relative density of the compacted sub-base? Given: emax = 0.85, emin = 0.42, and Gs = 2.68. To improve the bearing capacity of the same sub-base,the field engineers decided to increase the relative density to 85% by additional compaction. What would be the final dry unit weight of the compacted sub-base?
The soil for backfilling comes from a borrow pit. The water content of the soil in the borrow pit is 15% and its void ratio is 0.69. The swell index index is 1.2. The specification requires the backfill material to be compacted to a dry unit weight of 16 kN/m^3
1. What is the dry unit weight of the borrow pit material?
2. What is the volume of the borrow pit soil required?
3. What is the volume of borrow pit material required considering swell?
4. What is the number of truckloads of soil required for the footing foundation?
5. What is the weight of dry soil in one truck load?
6. What is the weight of water per truck load?
7. What is the degree of saturation of the soil in situation
Please answer. Thank you so much
The soil for backfilling comes from a borrow pit. The water content of the soil in the borrow pit is 15% and its void ratio is 0.69. The swell index index is 1.2. The specification requires the backfill material to be compacted to a dry unit weight of 16 kN/m^3
1. What is the dry unit weight of the borrow pit material?
2. What is the volume of the borrow pit soil required?
3. What is the volume of borrow pit material required considering swell?
4. What is the number of truckloads of soil required for the footing foundation?
5. What is the weight of dry soil in one truck load?
6. What is the weight of water per truck load?
7. What is the degree of saturation of the soil in situation
Please answer. Thank you! Guide is in the picture. Thanks
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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Similar questions
- CONSTANT HEAD PERMEABILITY TEST a. why the need to get the temperature of the collected water? b. what is the reason why we need a saturated specimen? c. why does the soil need to be compacted before undergoing the process?arrow_forwardIt is known that the natural soil at a construction site has a void ratio of 0.92. At the end ofcompaction, the in-place void ratio was found to be 0.65. If the moisture content remainsunchanged, then determine:(a) Percent decrease in the total volume of the soil due to compaction.(b) Percent increase in the field unit weight.(c) Percent change in the degree of saturationarrow_forwardA saturated soil specimen has w = 36% and ᵞd = 85.43 lb/ft3. Determine: i) Void ratio ii) Porosityarrow_forward
- In the field, the relative compaction (RC) of a sandy road foundation is 90%. Ya(max) = 20.4 kN/m and Ya(min) = 13.9 kN/m2 are the maximum and minimum dry unit weights of sand, respectively. Calculate the field values of the following: a) the dry unit weight in the field; b) the relative density (of compaction) D; and c) the moist unit weight y with a moisture content of 15%.arrow_forwardThe relative compaction of sand in the field is 95. The max dry unit weight of the sand is 16 kN/cum. Compute the moist unit weight at a moisture content of 8%arrow_forward2. A saturated soil sample has a water content of 34% and void ratio of 0.92. Determine the effective and moist unit weight. Another soil has an effec-tive unit weight of 10.29 kN/m3 and has a void ratio of 0.62, what is this soil’s bulk density and degree of saturation at a water content of 14%.arrow_forward
- The relative compaction of a sand in the field is 94%. Given the dry unit weight maximum= 16.2 kN/m3 and the dry unit weight minimum = 14.9 kN/m3.For the field conditions Compute the relative density of compactionarrow_forwardA 100 cm3 soil weighed 165g when moist, then after oven drying, its weight was reduced to 130g. Assuming that Vp/Vt= 0.45 and Hs=15cm. Solve the following: a) the void ratio, e. b) the degree saturation, %s. c) the height of water (hw). d) the volume of solid.arrow_forwardAssuming the fill soil does not change properties, how can the compated soil density exceed 100% standard proctor? a) Increased compaction energy b)Increased Strength c) Increased Plasticity Index d) Decreased permeabilityarrow_forward
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