4. Following are the results of a field unit weight determination test on a soil with sand cone method: • Calibrated dry density of Ottawa sand = 1667 kg/m • Calibrated mas of Ottawa sand to fill the cone = 0.117 kg • Mass of jar + cone + sand (before use) = 5.78 kg • Mass of jar + cone + sand (after use) = 2.85 kg • Mass of moist soil from hole = 3.42 kg Moisture content of moist soil =13.6% Find the dry unit weight of the soil

4. Following are the results of a field unit weight determination test on a soil with sand cone method: • Calibrated dry density of Ottawa sand = 1667 kg/m • Calibrated mas of Ottawa sand to fill the cone = 0.117 kg • Mass of jar + cone + sand (before use) = 5.78 kg • Mass of jar + cone + sand (after use) = 2.85 kg • Mass of moist soil from hole = 3.42 kg Moisture content of moist soil =13.6% Find the dry unit weight of the soil

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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The results of a constant head permeability test for a fine sand are as follows: Diameter of the sample = 31 cm Length of sample = 98 cm Constant head difference = 52 cm Time of collection = 364 secs Weight of water collected = 448 grams Find the seepage velocity in cm/min. if the void ratio is 0.33. Round off to four decimal places. Answer: 0.3943
Following are the results of a field unit weight determination test performed by means of sand-cone method. If maximum dry unit weight is 20 kN/m^3, Determine: Calibrated Dry Density of Sand 1731 kg/m^3 Mass of jar + cone + sand (before use) 6.08 kg Mass of jar + cone + sand (after use) 2.86 kg Mass of moist soil from the hole 3.34 kg Volume of Sand Filling the Cone 3.50x10^-4 m^3 Oven-Drying for Water Content Determination: Mass of Moist Soil + Container 70 g Mass of Dry Soil + Container 65 g Mass of Container 24 g 1. Volume of soil in the hole in m 3. (in SCIENTIFIC notation and in 2 decimal places) 2. Field Dry Unit Weight in kN/m^3 (in 2 decimal places) 3. Relative Compaction (in PERCENTAGE form and in 2 decimal places)
3. The following are the results of a field unit weight determination test performed on the soil by means of the sand cone method. Calibrated dry density of Ottawa sand = 1570 kg/m³ Calibrated mass of Ottawa sand to fill the cone = 0.545 kg Mass of jar + cone + sand (before use) = 7.59 kg Mass of jar + cone + sand (after use) = 4.78 kg Mass of moist soil dug from hole = 3.007 kg Water content of moist soil = 10.2% Max dry unit weight = 19 kN/m³ a. Determine the moist unit weight of compacted soil in kN/m³. b. Find the dry unit weight in kN/m³. c. Compute the relative compaction in the field.
Answer 4.7
Following are the results of a field unit-weight determination test performed on the same soil by means of the sand cone method: -Calibrated dry unit weight of Ottawa sand = 15.4019 kn/m3 -Calibrated weight of Ottawa sand to fill the cone = 5.3496 N -Weightof jar + cone + sand (before use) = 74.451 N -Weightof jar + cone + sand (after use) = 46.886 N -Weight of moist soil from hole = 29.509 N -Moisture content of moist soil = 10.21% DETERMINE AND SHOW COMPLETE SOLUTION 1. Dry density of compaction in the field in kg/cu.m.
2. A sensitive volcanic clay soil was tested in the laboratory and found to have the following properties: . p=1.28 Mg/m³ e = 9.0 S = 95% Ps= 2.75 Mg/m³ W = 311% In rechecking the above values, one was found to be inconsistent with the rest. Find the inconsistent value and report it correctly. Show all your computations and phase diagrams.
Answer 4.8
A soil sample has a bulk unit weight of 17.9 kN/m^3 at a water content of 16.9%. Use Gs=2.57 Determine the porosity. Answer in TWO(2) decimal places. Numerical values only. Don't indicate units here, just on the submitted solution.
21 The results of a constant head permeability test for a fine sand are as follows: Diameter of the sample = 37 cm Length of sample = 92 cm Constant head difference = 78 cm Time of collection = 337 secs Weight of water collected = 375 grams Find the seepage velocity in cm/min. if the void ratio is 0.6. Round off to four decimal places.
During the completion of a construction project, a soil sample was taken from an area of compacted earth fill for a sand-cone in-place density test. The following were obtained from the results of the test: • Weight of sand used to fill the test hole and the funnel of the sand-cone device = 845 g • Weight of sand to fill the funnel of the sand-cone device = 323 g • Unit weight of sand = 15.71 kN/m3 • Weight of wet soil excavated from test hole = 622 g • Moisture content of the soil excavated from the test hole = 16% %3D %3D Calculate the dry unit weight (kN/m³) of the excavated material
Problem 1.2.1: The data below were obtained with tension device from two soils of unknown texture. Suction (en) 0 10 20 50 100 300 1000 10,000 20,000 100,000 Water content Soil A Soil B 44 44 43.9 38 22.5 12.5 7 5.2 5.1 4.9 52 52 52 31 48 32 20 13.5 13 128 Answer the following questions: 1. Which soil has a higher porosity? 2. What is the bulk density of the two samples? (Assume that the density of solids comprising both samples is ps = 2.65gm/cm³.) 3. What is estimated water content in the two samples at suction 15cm?