A sample coarse grained soil is 60mm. In diameter and 150mm long was tested in a constant-head apparatus. The saturated soil sample was prepared at a moisture content 40%, specific gravity =2.61. The total head was kept constant at 250mm and the amount of water is collected in 4 sec. was 50cm^3. The test temperature was 30°C a.) Compute the temperature correction factor. _________ b.) Compute the corrected coefficient of permeability in cm/sec _________ c.) Compute the interstitial velocity in cm/s _________

Two days after heavy rain a 100 g soil sample was collected. The size of the remaining hole was 70 cm3. The air-dry soil weighs 80 g and contains 10% hygroscopic water. Calculate the oven-dry weight, the percentage of capillary water, bulk density and the percentage of pore space. Assume a particle density of 2.65 g/cm3

Ex Two identical soil samples (A) and (B) of a fully saturated N.C.C. were tested. Sample (A) was subjected to an unconfined compression test and failed when the deviator stress (OT-13) was (200) kN /n². Sample (B) was tested under UU conditions with a cell pressure of (300) kN/m². The pore water pressure at failure. was (200) kN/m². a) What was the pore water pressure at failure in sample (A). b) If C=o, Find (2) for this clay. (Itint. Start with soil B, and that (OJ) un= (FJ) afined). unconfined

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