Refer to the following data: Dry unit weight of soil in borrow pit Moisture content in borrow pit Specific gravity of the soil particles Modified Proctor optimum moisture content Modified Proctor max, dry density 13.67 kN/m3 13.0% 2.70 14.0% 18.2 kN/m3 Assume 38250 m³ of the soil from the borrow pit is to be delivered to an embankment at a construction site at a moisture content of 9%. With compaction to a minimum of 90% of Modified Proctor max. dry density, determine the total volume of water (in m³ that must be added to the soil to increase the moisture content to the optimum level. (PE)

Refer to the following data: Dry unit weight of soil in borrow pit Moisture content in borrow pit Specific gravity of the soil particles Modified Proctor optimum moisture content Modified Proctor max, dry density 13.67 kN/m3 13.0% 2.70 14.0% 18.2 kN/m3 Assume 38250 m³ of the soil from the borrow pit is to be delivered to an embankment at a construction site at a moisture content of 9%. With compaction to a minimum of 90% of Modified Proctor max. dry density, determine the total volume of water (in m³ that must be added to the soil to increase the moisture content to the optimum level. (PE)

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter5: Soil Compaction

Section: Chapter Questions

Problem 5.14P

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11. Situation 11 - The moist unit weight and degree of saturation of a soil are given in the following table. a. Determine the unit weight of the soil in kN/m3 if s = 13%. Round off to two decimal places. bDetermine the unit weight of the soil in kN/m3 if s = 69%. Round off to two decimal places. c. Determine the saturated unit weight in kN/m3. Round off to two decimal places.
The following are given for a natural soil deposit: Moist unit weight, γ = 17.8 kN/m3 Moisture content, w = 14%; Gs = 2.7 This soil is to be excavated and transported to a construction site for use in a compacted fill. If the specification calls for the soil to be compacted at least to a dry unit weight of 18.4 kN/m3 at the same moisture content of 14%, how many cubic meters of soil from the excavation site are needed to produce 20,000m3 of compacted fill?
A soil specimen having a volume of 0.012 m3 has a specific gravity of 2.60. It has a moist mass of 20.6 kg and a dried mass of 16.1 kg. Compute its void ratio.
For a granular soil, the following are given:●● Gs = 2.6●● Liquid limit on the fraction passing No. 40 sieve 5 20●● Percent retained on No. 4 sieve 5 20 Using Eqs. (5.4) and (5.5) attached , estimate the maximum dry density of compaction and the optimum moisture content based on the modified Proctor test.
The following results are obtained from standard compaction test for a soil, if Gs = 2.5 Water Content (%) 6.2 8.1 9.8 11.5 12.3 13.2 Unit weight (kN/m3) 16.9 18.7 19.5 20.5 20.4 20.1 Required: 1- The optimum water content (Wc %) 2- The maximum dry unit weight ( dry ) 3- The void ratio (e) 4- Degree of saturation (S %) 5- Find the weight of water needed to be added to 1 m3 to reach 100% saturation.
Figure 2 shows the dry density versus water content relationship for a fine-grained soilcompacted using two different levels of energy. Three points are identified on thesecompaction curves and labeled as A, B and C. Describe and compare the soil structure of A and B.
An earthen embankment under construction has a total unit weight o f 99.9 lb/ft3 and a moisture content of 10 percent. Compute the quantity of water required to be added per 100 ft3 of earth to raise its moisture content to 14 percent at the same void ratio.
For a silty clay soil given LL = 43 and PL = 18. Estimate the maximum dry unitweight of compaction that can be achieved by conducting a modified Proctor test. Use Eq attached.
For a given sandy soil, the maximum and minimum dry unit weights are 16.98 kN/m3 and 14.46 kN/m3, respectively. Given Gs = 2.65, determine the moist unit weight of this soil when the relative density is 60% and the moisture content is 8%. Show handwritten solutions.
For a given sandy soil, emax = 0.75, emin = 0.46 and Gs =2.68. If the relative density of the soil Dr =78% and its water content is 9%, determine: In situ void ratio Moist unit weight of compaction in KN/m3 Dry unit weight in KN/m3
Calculate the dry unit weight, the saturated unit weight and the buoyant unit weight of a soil having a void ratio of 0.70 and a value of Gs = 2.72. Calculate also the unit weight and water content at a degree of saturation of 75%.
A moist soil has a volume of 0.0081 m³ and weighs 151.2 N. The oven dry weight of soil is 138.6 N. Assume Gs = 2.7 and find the following in requested units: a. water content, w (%) b. total unit weight, y (kN/m²) c. dry unit weight, yd(kN/m²) d. void ratio, e