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Sand cone equipment is used to determine an in-place unit weight (field density test) on a compacted earth fill. Ottowa sand is used in the cone and is known to have a bulk density of 1604 kg/m3. The laboratory moisture unit weight curve indicates a dry unit wt. of 19.20kN/m3 and an optimum moisture content of 13%.Soil sample dug from the test hole. Wet weight of soil sample = 2220 g. Dried weight of soil sample = 1930 g. Weight of sand to fill the test hole = 1936 g. c. Compute the percentage of compaction of the tested soil
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- 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: a. The moisture content at the field (%) b. The field dry unit weight (kN/m³) c. The relative compaction (%) Soil Sample from the Hole Weight of Wet Soil Sample 2200g Weight of Dried Soil Sample 1930g Weight of Sand to fill the test 1636gAfalling-head permeability test is performed on a fine-grained soil. The soil sample has a length of 120 mm and a cross-sectional area of 600 mm2. The water in the standpipe flowing into the soil is 0.60 m above the top of the sample at the start of the test. It falls 50 mm in 30 minutes. The standpipe has a cross-sectional area of 200 mm2. (a) Make a sketch of the described conditions. (b) What is the coefficient of permeability in millimeters per second? (c) What is the coefficient of permeability in feet per minute? (d) On the basis of the calculated value for khyd, what is the probable soil type?Q1. Undisturbed soil sample was collected from the filed in Melbourne in steel tube for laboratory evaluation. The tube has the diameter of 85 mm, length of 170 mm and the moisture weight of 1600 g. If the oven-dried weight was 1200 g and Gs = 2.69, calculate the followings:a) Bulk unit weight (?) in kN/m3b) Field moisture content (w)c) Void ratio & porosity (e and ⴄ) d) Degree of saturation (Sr)
- Sand cone equipment is used to perform Field density test on a compacted arth fil. Soil sample dug from the test hole = 19.88 N Dry weight of soil sample = 17.92 N Ottawa sand used to fill the hole weighs 16.05 N and is known to have a density of 15.74 HN/m. Which of the following gives the water content of the tested soil? O a. 15.45% O b. 12.08% O c. 14.96% O d. 10.94% e. 11.12%Don't attempt wrong i will downvote.....A cylindrical soil sample, 7.3 cm in diameter and 16.8 cm in height, is tested in a constant-head permeability apparatus. A constant head of 75 cm is maintained during the test. After 1 minute of testing, a total of 945.7 gm of water was collected. The temperature was 20 oC. The void ratio of the soil was 0.43. Calculate the following: 1. The hydraulic gradient 2. The flow rate 3. The discharge velocity 4. The seepage force per unit volume 5. The coefficient of permeabilityA 443 gram, 42.8 mm diameter by 97 mm long clay specimen was tested in a triaxial test. After failure, the entire specimen was dried to a constant mass of 342 grams. Using either an assumed specific gravity of 2.579 or assuming saturation (whichever is more appropriate), FIND the moisture content (%, 1 decimal place).
- 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.1. Sand cone equipment is used to determine an in-place unit weight (field density test) on a compacted earth fill. Ottowa sand is used in the cone and is known to have a bulk density of 100 pcf. a. From the information given below, determine the in-place dry unit weight of the tested soil, and the water content. Soil sample dug from test hole wet weight = 4.62 lb Dried Weight of soil sample = 4.02 lb Weight of Ottowa Sand (Sand Cone) to fill test hole = 3.60 lb b. Determine the percentage of compaction of the tested soil if the laboratory moisture unit weight curve indicates a dry unit weight of 115 pcf and optimum moisture content of 13 percent.Problem: For a constant laboratory permeability test on a fine sand, the following data are given: Length of specimen - 16 cm Diameter of specimen - 9.6 cm Constant head difference - 50 cm Volume of water collected in 4 min - 420 cc Void ratio of the soil specimen - 0.55 A.) Determine the hydraulic conductivity of the soil in cm/sec B.) Determine the discharge velocity in cm/sec C.) Determine seepage velocity in cm/sec Problem: For a falling head permeability test, the following are given: Length of Soil Specimen - 200mm Area of Soil Specimen - 1000mm^2 Area of Stand pipe - 40mm^2 Head Difference at time t = 0 min - 500mm Head Difference at time t = 3 min - 300mm A.) Compute hydraulic conductivity of the soil in cm/sec B.) Compute the seepage velocity if the porosity is 0.25 in cm/sec C.) What is the head difference at time t = 100 sec in mm
- 3. The following results were obtained from a liquid limit test on a clay using Casagrande's cup device. # of blows 12 28 32 w (%) 52.5 47.1 43.2 38.6 37 Determine the liquid limit of this clay a) b) If the natural water content is 38% and the plastic limit is 23%, calculate the liquidity index and the consistency index. c) Describe the soil based on the consistency index d) Do you expect a brittle type of failure for this soil? If so – why/ why not?A soil sample has a weight of 120 grams before it was placed on the oven. After drying for 20 minutes, it weighs only 100 grams. Specific gravity of soil sample is 2.6. Volume of soil specimen before drying is 66 cm³. a. Compute the water content b. Compute the void ratio c. Compute the degree of saturation(c) A sample of clay having a mass of 675 gm was coated with paraffin wax. The combined mass of the clay and the wax was found to be 682 gm. The volume was found by immersion in water as 345 ml. The sample was then broken to open. The water content and specific gravity of solids were found to be 15 % and 2.70 respectively. Calculate the bulk density of soil, its void ratio, and degree of saturation. Take specific gravity of wax as 0.89.
