Practice problems Sol_Exam2_2022

Q1: Classify the below soil according to Unified Soil Classification System (USCS) and .the AASHTO System Sieve No. sieve Diameter 4.75 2 1.18 06 pass % 65 4. 10 52 40 16 30 40 26 0.425 0.25 0.075 21 60 14 200 10 And the Liquid Limit (LL) = 35. Plastic Limit (PL) = 18 100 90 80 70 60 50 40 30 20 10 0.01 0.1 10 Sieve Dia mm passing%

Q1: Classify the below soil according to Unified Soil Classification System (USCS) and the AASHTO System. Sieve No. sieve pass % 65 Diameter 4 4.75 10 52 16 1.18 40 30 0.6 26 40 0.425 21 60 0.25 14 200 0.075 10 And the Liquid Limit (LL) = 35 , Plastic Limit (PL) = 18 100 90 80 70 60 50 40 30 20 10 0.01 0.1 10 Sieve Dia mm % Buyssed

Classify Soil C using the following:a) AASHOb) USCSc) USDA if the composition of the soil is:a. 2% Gravelb. 35% Sandc. 50% Clayd. 13% Silt

Q1: Classify the below soil according to Unified Soil Classification System (USCS) and the AASHTO System. Sieve No. sieve Diameter pass % 65 4. 4.75 10 52 16 1.18 40 30 0.6 26 40 0.425 21 60 0.25 14 200 0.075 10 And the Liquid Limit (LL) = 35, lastic Limit (PL) = 18 100 90 80 70 60 50 40 30 20 10 0.01 0.1 1 10 Sieve Dia mm % Buyssed

Given the following soil properties of a road grading works. Moist unit weight = 19000 N/m³ Moisture Content = 12% Specific Gravity of soil solids = 2.66 Void ratio at its densest state = 0.44 Void ratio at its loosest state = 0.62 Determine the dry unit weight of the soil. Determine the in-situ void ratio of the soil. Determine the relative density of the soil

A synthetic soil is made by mixing: 400 plastic spheres with Gs = 0.8 and diameter = 5mm, and 250 glass spheres with Gs = 2.65 and diameter = 4mm. %3D %3D According to the USCS, would the synthetic soil classify as a sand or as a gravel? Show work to support your answer.

1. Classify the following soil to be used as a highway subgrade material using AASHTO method. Sieve Analysis % Finer No. 10 sieve = 88% No. 40 sieve = 75% No. 200 sieve = 34 % Plasticity for fraction passing No.4 Liquid Limit = 39% Plasticity Index = 12% %3D

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The values of liquid limit and plasticity index for soils having common geological origin in a restricted locality usually define (A) a zone above A-line. (B) a straight line parallel to A-line. (C) a straight line perpendicular to A line. (D) points may be anywhere in the plasticity chart.

Answer Choices: A) Cl B) ML C) CH D) MH

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Given the data of sieve analysis of the soil; 1. Determine the approximate effective size of the soil 2. Determine the approximate coefficient of curvature 3. Classify the soil using the AASHTO classification system

Question 4 Classify the following soils using the Unified soil classification system. Give group symbols and group names. % Passing No. 4: 99 % Passing No. 200: 76 LL = 60 PL = 32 %3D Group Symbol: Blank 1 Group name: Blank 2 Blank 1 Add your answer Blank 2 Add your answer

1. Why will bulk density vary between soils but it is valid to use a constant value for particle density (2.65 g cm-3)?

Given the test results that follow, classify the soil in both the Unified Soil Classification System (USCS) and the AASHTO system.

Classify all the soils in 5.8 using unified soil classification system. Give group symbols and the group names

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Classify the soil using AASHTO. The liquid limit and plastic limit are found to be 30 and 20, respectively. The following data are obtained: Percent passing No. 4 sieve: 100% Percent passing No. 10 sieve: 91% Percent passing No. 40 sieve: 60% Percent passing No. 200 sieve: 20%

3. Classify the following soils using the Unified Soil Classification System. Give group symbols and group names. Sieve Analysis (percent finer) Liquid Plastic Soil No. Comments Limit Limit No. 4 No. 200 1 94 3 NP 100 77 63 25 3 100 86 55 28 Cu = 4.48 4 100 45 36 22 And Cc= 1.22 5 92 48 30 60 40 26 4 7 99 76 60 32

Question 18 Classify the following soils using the Unified soil classification system. Give the group symbol. No. 4 = 92 No. 200 = 48 LL = 30 PL = 8 A) SP В GC SM D SC

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Geotechnical Engineering what is the classification of soil A,B and C?

2. Prove n-e/(1+e) and e-n/(1-n) based on definitions of void ratio and porosity. 3. Classify the following soils according to the unified soil classification system: group symbols and typical names Soil A B Percent passing U.S. sieve No. 4 No. 10 No. 20 No. 40 No. 60 No. 100 No. 200 95 86 65 52 46 38 25 98 95 88 82 75 65 100 LL PL 38 65 22 58

Table 2. Soils data Effective Void ratio stress,o’ kPa Soil A Soil B 25 0.93 1.06 50 0.92 0.98 100 0.88 0.9 200 0.81 0.81 400 0.714 0.71 800 0.61 0.61

The results of the sieve analysis of a non plastic soil is tabulated below. Classify the soil according to AASHTO classification system and unified soil classification systems (USCS). Diameter (mm) 4.75 % Passing 100 2.0 0.85 0.425 98 92 12 0.150 0.075 4 2 D10 D30 D60 0.39 0.51 0.62

The result of sieve analysis of three soils is given next. It is required to classify these soils according to the AASHTO Classification System. Use the attached AASHTO Classification of Highway Subgrade Materials Table. (a) Classification of Soil A. (b) Classification of Soil B. (c) Classification of Soil C. Sieve Analysis Results for Situation 9 Sieve Analysis Sieve Diameter, Percent Passing Number mm. 4.76 90 100 100 8. 2.38 84 90 100 10 2. 72 77 98 20 0.84 66 59 91 40 0.42 58 50 85 60 0.25 50 42 79 100 0.149 44 36 70 200 0.074 38 33 LL 42 46 47 PL 23 29 24 63

Please need to solve all questions : Answer the following 1- The field bulk density of coarse grained soils can be determined by. 2- Density of soil changes with depth of soil? (a) True b) False 3- What are the methods to calculate the field density of soil? 4- The field bulk density of clayey soil can be determined by................. 5- Different soils have different unit weights (a) True (b) False (c) Cannot be answered c) may be d) none)

Subject: Geotechnical engineering Give me both solutions. Show me with clear steps