For a given sandy soil, the maximum and minimum void ratios are 0.72 and 0.46, respectively. If Gs= 2.71 and w=11%, what is the moist unit weight of compaction in the field if the relative density equals 82%?   Problem 5 A soil sample has a unit weight of 105.7 pcf and a degree of saturation of 50% When the saturation is increased to 75%, its unit weight raises to 112.7 pcf. Determine the void ratio e and the specific gravity Gs for this soil.

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.

please answer all parts

A soil sample has the following size distribution; 4 to 2mm = 17%, 2 to 0.05 mm = 12%, 0.5 to 0.005 mm = 22% 0.005 to 0.002 mm = 10% <0.002 mm = 39% what are the percentages of clay, silt, and sand? Using USDA calssification what is the modifier and tetural classification

2.4 The following are the results of a sieve analysis. 2.1 For a gravel with Dg = 0.48 mm, D = 0.25 mm, and Dn = 0.11 mm, calculate the uniformity coefficient and the coefficient of gradation. Is it a well-graded or a poorly graded soil? 2.2 The following values for a sand are given: Dn = 0.3 mm, D = 0.41 mm, and D = 0.77 mm. Determine C, and C, and state if it is a well-graded or a poorly-graded soil. U.S. sieve no. Mass of soil retained (g) 4. 10 18.5 20 532 40 90.5 60 818 100 92.2 200 585 Pan 26.5 a. Determine the percent finer than cach sieve and plot a grain-size distri- bution curve. b. Determine Dg. Dy. and D, for each soil. . Calculate the uniformity coefficient C d. Calculate the coefficient of gradation C,.

1. Sand cone equipment is used to determine an in-place unit weight (field density test) on a compacted earth fill. Ottowa sand is used in the cone and is known to have a bulk density of 100 pcf. a. From the information given below, determine the in-place dry unit weight of the tested soil, and the water content. Soil sample dug from test hole wet weight = 4.62 lb Dried Weight of soil sample = 4.02 lb Weight of Ottowa Sand (Sand Cone) to fill test hole = 3.60 lb b. Determine the percentage of compaction of the tested soil if the laboratory moisture unit weight curve indicates a dry unit weight of 115 pcf and optimum moisture content of 13 percent.

c. Recall that the natural moisture of the soil is 36.4%. Consider that the following propertieswere also measured using the relevant experimental procedures on representative(saturated) samples of the soil deposit at a depth of 3 m: Specific gravity, Gs = 2.62Unit weight of water, gw = 9.81 kN/m3 Draw a phase diagram and estimate the void ratio and the bulk density of the soil. Whatcan you comment in relation to the density of the soils and its expected compressibility?How would you expect these to vary with depth?

A sand cone equipment is used to perform a field density test on a compacted earthfill. Weight of soil sample from the test hole is equal to 20.60N and Dry weight of soil sample is equal to 17.92N. Ottawa sand used to fill the hole weighs 16.05N and is known to have a density of 15.74KN/m3. Determine the following: (a) The moisture content of the soil (b) The in- situ dry unit weight of the soil (c) If the dry unit weight of the soil at optimum moisture content is 18.10 kN/m3, calculate the percent compaction of the earth fill.

Q1: Use the USCS to Classify the soil sample with the following data: % passing 4.75 mm Sieve = 64 % passing 75- Sieve =4 Uniformity Coefficient= 7.5 Coefficient of Curvature=2.7 Plasticity index = 2.5 Solution: Q2: Use the USCS to Classify the soil samples with the following data dalla Soil LL PL Group Symbol Soil Name 15 35 25 ABC 8. ८८ 25 45 65 2-Seepage velocity (m/s) = 70 3- Flow rate in (m3/s) = oss and dry ng www Parmbly & volume change decrease Campering wes Toughness and dry strength dease Presby & val change in 10 20 30 40 50- 60 Liepakt. 70 80 Atra -0.73 (W₂-201 90 Q3: For the soil shown below the hydraulic conductivity is (3 m/day). The sample diameter is 1.5 m. The porosity is (30%). Find: 1- Flow velocity (m/s)== 100 110 120 Soil 4 m ITE

Given the coefficient of curvature =1.4 ‚D_{30}=3mm, D_{10} = 0.6 mm. Based on this information of particle size distribution for use as subgrade, this soil is classified as-