Classify the soil according to the USCS 1. Percent passing No. 4 Sieve = 70 Percent passing No. 200 Sieve = 30 Liquid Limit = 33 Plasticity Index = 12 2. Percent passing No. 10 Sieve = 100 Percent passing No. 40 Sieve = 80 Percent passing No. 200 Sieve = 58 Liquid Limit = 30 Plasticity Index = 10 %3D

A Sample of soil was tested in the laboratory, and results of the laboratory tests were as follows: Liquid limit =42% Plastic limit =16% U.S. Sieve Size           Percentage Passing No. 4                                       100 No. 10                                      93.2 No. 40                                      81.0 No. 200                                    60.2 Classify the soil sample by the AASHTO classification system.

The following are the results of a sieve analysis: U.S. Sieve No. Mass of Soil Retained on each Sieve (g) 10 18.5 20 53.2 40 90.5 60 81.8 100 92.2 200 58.5 pan 26.5 a. Determine the percent finer than each sieve size. U.S. Sieve No. Percent finer (%) 10 20 40 60 100 200 pan 100 90 80 70 60 50 40 30 20 10 0.05 Grain size (mm) –log scale b. From the graph, , determine the uniformity coefficient Cu c.Calculate the coefficient of gradation, Cc, Percent passing

|Laboratory testing was performed on two soil samples (A and B). (a) Determine the USCS classification symbol for Sample A. (b) Determine the AASHTO classification for Sample B. Sieve No. Sieve Opening (mm) A- Percent Passing B - Percent Passing 3 inch 76.2 100 1.5 inch 38.1 98 0.75 inch 19.1 96 4 4.75 77 100 10 2.00 96 20 0.85 55 94 40 0.425 73 100 0.15 30 200 0.075 18 55 Liquid Limit 32 52 Plastic Limit 25 32 A Silty Clay (CL) sample was extruded from a 6-inch long tube with a diameter of 2.83 inches and weighed 1.71 lbs. (a) Calculate the wet density of the CL sample. (b) A small piece of the CL sample had a wet weight of 140.9 grams and a weight of 85.2 grams after drying. Compute the water content. (c) Compute the dry density of the CL sample A Standard Proctor test was performed on a soil with a specific gravity of 2.71. For the water content and wet soil unit weight in the following table: a) Plot the moisture-dry unit weight curve b) Find the maximum dry density and optimum…

Classify the given soil to be used as highway subgrade material by using the AASHTO method. Sieve Analysis (% Finer) No. 10 sieve = 100% No. 40 sieve = 72% No. 200 sieve = 39% Plasticity of fraction passing No. 40 sieve Liquid Limit = 44 Plasticity Index = 24

Classify the following soils by AASHTO classification system. Percent finer than (sieve analysis) Liquid Limit Plasticity Index Soil No. 4 No. 10 No. 40 No. 200 1 95 82 55 41 32 12 94 80 51 15 26 12 Silty-Clay Materials (more than 35 % passing No. 200 sieve) A-7 General Granular Materials Highly Organic Classification (35 % or less passing No 200 sieve) A-1 A-2 Group Classification A-1-a A-1-b A-3 A-2-4 A-2-5 A-2-6 A-2-7 A-4 A-5 A-6 A-7-5 A-8 A-7-6 Sieve Analysis percent passing: # 10 < 50 # 40 # 200 S 30 5 50 s 51 <15 25 $10 <35 35 s 35 35 236 2 36 2 36 236 Characteristics of fraction passing #40 Liquid limit Plasticity index < 40 241 40 241 NP3 <40 241 40 241 2 11 11 10 <10 211 211 < 10 <6 Stone <10 Usual types of signifcant constituent materials fragments; gravel and sand Fine Peat or sand Silty or clayey gravel and sand Sity soils Clayey soils muck General ratins as Excellent to good Fair to Poor Unstable subgrade VI VI VI VI VI

4. Classify the soil according to AASHTO. Describe the steps. Percent passing sieve No. 10, F₁0 = 80% Percent passing sieve No. 40, F40 = 60% Percent passing sieve No. 200, F200 = 40% Liquid limit, WLL = 33.1% Plastic limit, WPL = 24.9% Plasticity index, PI = 8.2%

Classify a soil with 30% clay, 15% silt, 32% sand, and 23% gravel. 100 90 10 80, 20 30 70, Clay 60 40 50 50 Sandy 40 Clay Sitty Clay 60 Silty Clay Loam SandyClay Loám 30 Çlay Loam 20, 70 80 Loam Sift Loam Sandy Loan bamy San 10 90 Šilty /San 100 90 80 70 60 50 40 30 20 10 100 Percentage by Weight Sand a. Silt Loam b. Sandy Clay Loam c. Sandy Loam O d. Clay Loam Percentage by Weight Silt Percentage by Weight Clay

SG is 2.66 and temperature is 18 degrees celcius

• Problem 1- . Classify the soil to be used as a highway subgrade material using AASHTO classification system; Sieve No. No. 4 No. 10 No. 20 No. 40 No. 60 No. 140 No. 200 Size opening (mm) 4.75 2.00 0.850 0.425 0.250 0.140 0.075 % Finer 100 92 84 69 50 40 37 Liquid limit for soil passing # 40 sieve was determine to be 40% and plasticity index was 20%.