A sample of soil compacted according to the standard Proctor test has a density of 2.06 g/cm³ at 100% compaction and at an optimum water content of 14%. What is the dry unit weight? What is the dry unit weight at zero air-voids? If the voids become filled with water what would be the saturated unit weight? Assume Gs = 2.67

A sample of saturated clay was placed in a container and weighed. The weight was 6N. The clay in its container was placed in an oven for 24 hours at 105˚C. The weight reduced to a constant value of 5N. The weight of the container is 1N. If Gs = 2.7, determine: a) Water Content  b) Void Ratio  c) Bulk Unit Weight  d) Dry Unit Weight  e) Effective Unit Weight

A field sand cone test is performed on a layer of compacted fill.  determined that the fill soil has a maximum dry unit weight of approximately 120 pcf. Determine the relative compaction of the compacted fill. Unit weight of dry uniform of sand: 95 pcf Weight of sand to fill the cone: 1.10 lb weight of jar + cone + sand (before test): 16.5 lb Weight of jar + cone + sand (after test): 10.5 lb Weight of moist soil excavated from hole: 6.60 lb Moisture content of soil from hole: 10 %

3-8 A 1-ft3 of undisturbed soil sample has a dry weight of 107 lbs. The specific gravity of the soil solids is 2.70. Need Vs VT = 1 To solve for Vs = use the following equation Ws=Vs*Gs*yw (solve for Vs) a) Calculate the void ratio of the sample. b) Calculate the porosity of the sample. DC

Situation 3: The total volume of a soil specimen is 80,000 mm 3 and it weighs 150 grams. The dry weight of the specimen is 130 grams and the density of the soil solids is 2680 Kg/m3 . Find the following: a. The water content b. Void Ratio c. Porosity d. Degree of saturation e. Saturated unit weight f. Dry unit weight

Situation 4: A dry sand is placed in a container having a volume of 0.3 ft3 . The dry weight of the sample is 31 Ib. Water is carefully added to the container so as not to disturb the condition of the sand. When the container is filled, the combined weight of soil plus water is 38.2 Ib. From these data, a. Compute the void ratio of soil in the container b. Specific gravity of the soil particles c. A borrow material has a volume of 191,000 m3 and void ratio of 1.2. After compaction its new void ratio is 0.7, find the corresponding volume?