A soil sample was taken for bulk density determination using a core sampler which is cylindrical in shape (see below). Calculate the soil bulk density, also known as dry bulk density, for a 187.4 g dry soil sample taken using the cylindrical core shown. 2.45 cm 7.53 cm
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- The same soil sample has a natural moisture content of 30% and was subject to the Atterberg Limits test. The plastic limit was measured as 27 while the liquid limit test shows the results in the table below. Number of Blows 42 26 10 Moisture Content 20 32 45 a. Determine the liquid limit of the soil sample. Show and briefly explain how you got the answer. b. Solve and describe the Plasticity Index of the soil sample. c. Determine value and soil state of the liquidity index of the soil sample. d. Determined and describe the clay activity of the soil sample.Initial data for determining the specific gravity of a soil sample is given below: Calibration of Pycnometer (1) Mass of dry clean pycnometer, Mp= 317.11 g (2) Mass of pycnometer + water at calibration temperature, Mpw,c = 903.03 g (3) Observed temperature of water at calibration, Tc = 26.4°C Determine the calibrated volume of the pycnometer, Vp. (Units of mL, 3 decimal places) Your Answer:Question 8 (1) - Oedometer test What are the boundary conditions applied to a soil sample tested in an Oedometer? Z H a) Pore water pressure at z = H (top of the sample) is PH = Yw. H b) Ez = Ex c) &z=&v (₂ is the volumetric strain of the sample) d) At time t=0, 4p = 0
- 8. The following data were obtained: Weight of wet soil = 70.5 g Weight of dry soil = 62.5 g Volume of water before adding soil = 70 ml %3D %3D Final volume of soil-water mixture = 93 ml Total soil volume = 40 cm³ a. Calculate the bulk density. b. Calculate the particle density. c. Calculate the percent pore space. Calculate the volume in cm³, of a soil sample weighing 200 g. Assume the bulk density is 1.3. Mg/m³. 9. (a) Calculate the bulk density of a soil having a total porosity of 45%. Assume the particl density is 2.65 Mg/m³. (b) Calculate the total volume and the volume of solids in 250 g of the above soil. 10.Initial data for determining the specific gravity of a soil sample is given below: Calibration of Pycnometer (1) Mass of dry clean pycnometer, Mp= 317.11 g (2) Mass of pycnometer + water at calibration temperature, Mpw,c = 903.03 g (3) Observed temperature of water at calibration, T = 26.4°C Secondary data for the determination of Specific Gravity is as follows: Determination No: Mass of pycnometer + soil + water at test temperature, Mpws,t (9) Test Temperature, T₁ (°C) Mass of pycnometer + water at T₁, Mpw,t (9) Evaporating dish no. Mass of evaporating dish, M. (g) Mass of evaporating dish + oven-dried soil, Mas (9) Mass of solids, M, (g) Conversion factor, K Specific gravity of soil, Gs@20°C Determine the conversion factor, K (5 decimal places) 1 966.17 22.3 1 15.52 115.51Initial data for determining the specific gravity of a soil sample is given below: Calibration of Pycnometer (1) Mass of dry clean pycnometer, Mp= 317.11 g (2) Mass of pycnometer + water at calibration temperature, Mpw,c = 903.03 g (3) Observed temperature of water at calibration, T = 26.4°C Secondary data for the determination of Specific Gravity is as follows: Determination No: Mass of pycnometer + soil + water at test temperature, Mpws,t (9) Test Temperature, T₁ (°C) Mass of pycnometer + water at T₁, Mpw,t (g) Evaporating dish no. Mass of evaporating dish, Md (g) Mass of evaporating dish + oven-dried soil, Mds (9) Mass of solids, Mş (9) Conversion factor, K Specific gravity of soil, Gs@20°C 1 966.17 22.3 1 15.52 115.51 Determine the Mass of pycnometer + water at T₁, Mpw,t. (Units of g, 2 decimal places) Note: Find Pw,t using table 6-1.
- Initial data for determining the specific gravity of a soil sample is given below: Calibration of Pycnometer (1) Mass of dry clean pycnometer, M₁ = 317.11 g (2) Mass of pycnometer + water at calibration temperature, Mpw,c = 903.03 g (3) Observed temperature of water at calibration, Tc = 26.4°C Secondary data for the determination of Specific Gravity is as follows: Determination No: Mass of pycnometer + soil + water at test temperature, Mpws,t (9) Test Temperature, T₁ (°C) Mass of pycnometer + water at T₁, Mpw,t (9) Evaporating dish no. Mass of evaporating dish, Md (9) Mass of evaporating dish + oven-dried soil, Mds (g) Mass of solids, Ms (9) 1 966.17 22.3 1 15.52 115.51 Conversion factor, K Specific gravity of soil, Gs@20°C Determine the Mass of Solids, Ms. (Units of g, 2 decimal places)The table below shows the results from the specific gravity (S.G.) test performed in a soil laboratory including twenty samples of sand. Determine the Coefficient of Quartile Variation. * Number of Specific Gravity Samples 2.30-2.39 1 2.40-2.49 2 2.50-2.59 3 2.60-2.69 6 2.70-2.79 7 2.80-2.89 1 O 0.087 O 0.011 O 0.065 O 0.033 0.024The following are the data of a soil sample: Sample Size – 2-inch diameter, 4 inches high. Wet weight – 0.401 lbs Oven-dry weight – 0.334 lbs Specific Gravity – 2.68 Calculate the following: a. Void Ratio b. Water content c. Degree of Saturation d. Dry Unit Weight in pcf e. Unit weight in pcf f. Saturated Unit Weight in pcf g. Dry Density in English h. Density in English i. Saturated Density in English
- The coefficient of permeability for a fine-grained soil is determined in a laboratory by use of a falling-head test. Test conditions and results are as indicated below. Determine the coefficient of permeability, then indicate the probable soil classification. Length of soil sample = 150 mm Cross-sectional area of sample = 1,140 mm2 Cross-sectional area of standpipe = 200 mm2 At the start of the test, the water level in the supply standpipe is 1 m above the top of the permeameter. One hour after start, the water level in the supply standpipe is 0.95 m above the top of the permeameter.The following data were obtained from laboratory tests for a cohesive soil: moisture content = 22.5%, specific gravity = 2.60. To determine the approximate unit weight, a sample having a mass of 224 g was placed in a 500 cm container with 382 cm of water required to fill the container. What is the void ratio? Select one: a. 0.68 b. 0.89 c. 0.57 d. 0.70(b) Classification tests for the determination of the particle size distribution of a soil produced the following results: Particle Size % finer (mm) 99 2.36 80 1.3 63 0.6 33 0.2 10 0.075 3 0.02 Then using cone penetrometer for Liquid Limit test, the results were recorded as follows. Cone penetration 15.9 17.7 19.1 20.3 22.5 (mm) Water 32.6 42.9 51.6 59.8 66.2 content (%) While the plastic limit test conducted for the same soil recorded as below:- Test No. 1 2 3 Wet soil 10.01 11.23 9.72 Dry soil 8.02 9.01 7.72 SKAA 1713 4 i) Plot the grain size distribution curve on the log graph that has been provided (Figure 2b). Calculate the uniformity coefficient, Cu and the coefficient of gradation, C, for the soil sample. Determine the plastic limit, the liquid limit and the plasticity index of the soil. Plot the graph to help you obtain the results (if necessary). ii) iii)