The following values for sand are given: D 10 = 0.28 mm „D = 0.45 mm ,D 30 0.7mm. 60= Determine C (Coefficient of uniformity) and C (Coefficient of curvature) and state if it is a well graded or a poorly graded soil
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- Hydrometer and sieve analysis were conducted on a soil sample. Find D10 Deo uniformity coefficient (Cu), coefficient of curvature (CC) considering the chart given below. Hint: Cu=Deo/D10 and CC=(D3)2 / (D1oxD6o) 100 90 80 70 60 50 40 30 20 10 0,001 CLAY 0,01 SILT 0,1 SAND GRAVEL 10 100 DANE ÇAPI/ PARTICLE SIZE (mm) Dec: (in mm) seç. CC Seç. Cu Seç. D10: (in mm) Seç. GEÇEN DANE YÜZDESİ / PERCENT FINER THAN DSituation 4: Consider the following information obtained from a sieve analysis. Sieve Number Sieve Opening (mm) 4.75 2.00 4 289988 10 20 40 60 100 200 Percent Finer (9) 75 51 38 25 19 10 4a. What is the uniformity coefficient for this coarse- grained soil? Plot your curve using the empty gradation curve on included empty gradation curve. 4b. What is the coefficient of curvature? 4c. What is the sorting coefficient? 0.84 0.42 0.25 0.149 0.0758. The grain size analysis for a soil is given as: asso a. Plot a grain-size distribution curve. b. Determine D10, D30, and D60 from the grain-size distribution curve. c. Calculate the uniformity coefficient, Co. d. Calculate the coefficient of curvature, Co Sieve No. 4 10 20 40 60 100 200 Pan Mass of soil retained (g) 28 42 48 128 221 86 40 24 Cu= Duo / Dio (c = (P30)² 2²/D₁x Duo
- Plot sieve size (x-axis) against % finer. Calculate for D60mm, D30mm and D10mm. Find the percentage of gravel, sand and fines. Find the CU (Coefficient of uniformity) and CC (coefficient of curvature). How does the particle size distribution of granular materials affect the properties of soil such as bulk density, permeability, and physical stability? Note the following: = D60/D10 and CC= D302 /D60 ×D10 See attached picture for information1. A dry sand is placed in a container having a volume of 0.0092 cubic centimeter. The dry unit weightof the sample is 0.015 gram. Water is carefully added to the container so as not to disturbed thecondition of the sand. When the container is filled, the combined weight of soil plus water is 0.0182gram.a. Determine the specific gravity of soil particle.b. Determine the dry unit weight of soil.2. If the soil sample has a water content of 11% and a unit weight of 19.67 kN/m3 , determine thepercentage of air in voids and the degree of saturation if the specific gravity of soil solid is 2.75.3. If the soil sample has a specific gravity of 2.71 and a porosity of 0.345, determine the saturated unitweight and the bouyant unit weight.4. A soil sample having a liquidity index of 0.85, a plasticity index of 16.50 and a plastic limit of 11.45.The soil sample has a specicfic gravity of 2.68 and a void ratio of 0.77.a. Compute the degree of saturation.b. Compute the air void ratio.a. determine the coefficient of curvature b. determine the coefficient of uniformity 500 grams of dry soil was tested for grain size analysis and the following observations were recorded. Opening Size (mm) Mass Retained (g) 2 10 1.4 18 1 60 0.5 135 0.25 145 0.125 56 0.075 45 Pan 31
- Problem 1: For a gravel with D60 0.48mm, D30 0.25mm, and D10 coefficient and the coefficient of gradation. Is it a well-graded or poorly graded soil? - = = = 0.11mm, calculate the uniformity Problem 2: 0.3 mm, D30 The following values for a sand are given: D10 Determine Cu and Cc and state if it is a well-graded or a poorly graded soil. = 0.41 mm, and D60 = = 0.77 mm.Subject Geotechnical engineering : soil mechanics A layer soil shown has the following data H1= 3m. K1= 2x10^-2 cm/sec H2= 4m K2= 3.2x10^-2 cm/sec H3= 6m K3= 4.1 x 10^ -2 cm/sec Compute the equivalent coefficient of permeability in vertical direction. Compute the velocity if h= 4m4. Determine the PI and LI for a soil with the following parameters. Would you expect this soil to be soft or stiff? Will it be brittle or plastic? W₁ = LL = PL = 55 59 31 5. Will the above soil be soft or stiff? How do you know?
- The grain-size characteristics of soil re given in the following table. Use Table 2.3 for the analysis. Size (mm) Percent finer 0.425 100 0.1 79 0.04 57 0.02 48 0.01 40 0.002 35 0.001 33 Table 2.3 Particle-Size Classifications Grain size (mm) Name of organization Gravel Sand Silt Clay Massachusetts Institute of Technology (MIT) >2 2 to 0.06 0.06 to 0.002 2 <0.002 76.2 to 2 2 to 0.075 0.075 to 0.002 <0.002 Fines (i.e., silts and clays) <0.075 76.2 to 4.75 4.75 to 0.075 Note: Sieve openings of 4.75 mm are found on a U.S. No. 4 sieve; 2-mm openings on a U.S. No. 10 sieve; 0.075-mm openings on a U.S. No. 200 sieve. See Table 2.5. i.) What is the percentages of gravel, sand, silt and clay according to the MIT system. a.) Gravel – 0%; Sand – 38%; Silt – 30%; Clay – 35% b.) Gravel – 0%; Sand – 37%; Silt – 30%; Clay – 35% c.) Gravel – 0%; Sand – 36%; Silt – 30%; Clay – 35% d.) Gravel – 0%; Sand – 35%; Silt – 30%; Clay – 35% e.) None of the aboveSubject :Geotechnical engineering Here's the problem For a soil, suppose that D10=0.08mm,D30=0.22mm and D60=0.41mm.calculate the uniformly coefficient and the coefficient of gradationProblem 2.1: The following values for a sand are given: D10 = 0.3 mm, D30 = 0.41 mm, and D60 = 0.77 mm.Determine Cu and Cc, and state if it is a well-graded or a poorly-graded soil.