Sand cone equipment is used to determine an in-place unit weight (field density test) on a compacted earth fill. Ottawa sand is used in the cone and is known to have a bulk density of 1604kg/m³. The laboratory moisture unit weight curve indicates a dry unit weight of 19.20kN/m³ and an optimum water content of 13%. Determine: Soil Sample from the Hole a. The moisture content at the field (%) b. The field dry unit weight (kN/m³) c. The relative compaction (%) Weight of Wet Soil Sample Weight of Dried Soil Sample Weight of Sand to fill the test 2200g 1930g 1636g

Sand cone equipment is used to determine an in-place unit weight (field density test) on a compacted earth fill. Ottawa sand is used in the cone and is known to have a bulk density of 1604kg/m³. The laboratory moisture unit weight curve indicates a dry unit weight of 19.20kN/m³ and an optimum water content of 13%. Determine: Soil Sample from the Hole a. The moisture content at the field (%) b. The field dry unit weight (kN/m³) c. The relative compaction (%) Weight of Wet Soil Sample Weight of Dried Soil Sample Weight of Sand to fill the test 2200g 1930g 1636g

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter6: Hydraulic Conductivity

Section: Chapter Questions

Problem 6.7P

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6. The maximum dry unit weight determined in the laboratory for a quart sand is 102 lb/ft3. In the field, the relative compaction is 90%. Specific Gravity of Sand is 2.70. Determine the void ratio at the maximum dry unit weight condition. Determine the void ratio of the sand in the field condition. Determine the hydraulic conductivity of the sand in the field condition if the hydraulic conductivity of the sand at the maximum dry unit weight condition is 0.30 cm/sec. Using Kozeny-Carman equation.
4- The values of the minimum (emin) and maximum void ratio (emax) for a sample of pure silica sand were found to be 0.42 and 0.67, respectively. The specific gravity of solids (Gs) for the sand is 2.69. a. What is the corresponding range in dry unit weights? b. What is the corresponding range in the saturated unit weights? c. If a relative density (Dr) of 78% is desired, what will be the moisture content associated with full saturation?
For a sand sample the values of the minimum (emin) and maximum void ratio (emax) are 0.42 and 0.67, respectively. The specific gravity of solids (G₂) for the sand is 2.66. a) What is the corresponding range in dry unit weights? b) What is the corresponding range in the saturated unit weights? c) If a relative density (Dr) of 87% is desired, what will be the moisture content associated with full saturation?
****PROVIDE STEP BY STEP SOLUTION SOLVING H1 AND H2 VALUES in part B***** A constant head permeability test is performed on soil that is 2 cm x 2 cm square, and 2.5cm long. The head difference applied during the test is 20 cm and 7 cm3 is collected over a time of 100 sec. Provide step by step solution. a) Compute the permeability based on these test conditions and results. b) A falling head test is conducted on the same soil specimen at the same time (t1 – t2 = 100 sec), and the standpipe diameter is 0.8 cm. If the average head during the test should be 18 cm, what are h1 and h2 values, provide step by step solution solving h1 and h2 values.
Show calculation on how to determine the average coefficient of permeability of the sand sample at 20°C. Also show calculations on how to determine the discharge the K1 and Average K1
Show calculation on how to determine the average coefficient of permeability of the sand samplea at20°C.
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PART IV: PERMEABILIT Y PROBLEM A For a constant head laboratory test on a fine sand, the following are the given values : • Length of the specimen • Di ameter of the specimen 14.0 inches 3.25 inches He ad difference 25.0 inches Water collected in 2.50 mins Void ratio A. Compute for the hydraulic conductivity of the soil in in/sec. B. Determine the discharge velocity through the soil in in/sec. c. Determine the seepage velocity in in/sec. 0.065 cubic inches 0.45
Q.5) For a sand sample the values of the minimum (emin) and maximum void ratio (emax) are 0.42 and 0.67, respectively. The specific gravity of solids (G) for the sand is 2.66. a) What is the corresponding range in dry unit weights? b) What is the corresponding range in the saturated unit weights? c) If a relative density (Dr) of 87% is desired, what will be the moisture content associated with full saturation?
A cubical sample collected from Lobo shoreline (a soft marine silty clay) has been preparedfor testing in a true triaxial device. The dimensions of the sample are 78 mm by 78 mm by 78mm. The sample has a moisture content (w) of 68.5% and a moist density (ρ) of 1.43 g/cm3.The average specific gravity of solids (Gs) is 2.55.Determine(a) the void ratio (e),(b) the degree of saturation (S),(c) the moist density (γ),(d) moisture content (w) if the soil becomes saturated at the same total volume;(e) the density (ρ) of the soil if all pore fluid is dried off with no change in totalvolume.
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