Module 2 Plasticity The following data were obtained from the Atterberg Limits test for a soil: Liquid Limit = 41.0 % Plastic Limit = 21.1 % a) What is the plasticity index of the soil? b) If the in situ moisture content of the soil is 30%, what is the liquidity index of the soil? c) What would be the nature of the soil? Soil Classifications Classify the following soils by the AASHTO classification system. Description Soil A Soil B Soil C Percent finer than No. 10 sieve 83 100 48 Percent finer than No. 40 sieve 48 92 28 20 86 Percent finer than No. 200 sieve 20 70 Liquid limit Plasticity index 32 Nonplastic

Module 2 Plasticity The following data were obtained from the Atterberg Limits test for a soil: Liquid Limit = 41.0 % Plastic Limit = 21.1 % a) What is the plasticity index of the soil? b) If the in situ moisture content of the soil is 30%, what is the liquidity index of the soil? c) What would be the nature of the soil? Soil Classifications Classify the following soils by the AASHTO classification system. Description Soil A Soil B Soil C Percent finer than No. 10 sieve 83 100 48 Percent finer than No. 40 sieve 48 92 28 20 86 Percent finer than No. 200 sieve 20 70 Liquid limit Plasticity index 32 Nonplastic

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter5: Classification Of Soil

Section: Chapter Questions

Problem 5.10P

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Prob.1 The following data were obtained from the Atterberg Limits test for a soil Liquid limit = 41% Plastic limit = 21.1 % a.) What is the plasticity index of the soil?b.) If the in situ moisture content of the soil is 30%, what is the liquidity index of the soil?c.) What would be the nature of the soil?
A silt–clay soil has a plastic limit of 25 and a plasticity index of 30. (a) If the natural water content of the soil is 35 percent, what is the liquidity index? (b) What soil type is this, according to the Unified Soil Classification System and the AASHTO system?
A compacted sample of soil with a bulk density of 125 pcf has a water content of 15%. What are its dry density, degree of saturation and air-content? Assume Gs = 2.65. If the sample is allowed to get fully saturated, without any increase in its volume, what would be its bulk density?
An in-situ (subgrade) soil located in Colorado (TMI = -20) has the following index properties: Percent passing No.200 = 25 percent Plasticity Index = 20 Compaction tests indicate this soil has an optimum degree of saturation of 85 and a maximum dry unit weight of 100 PCF. The resilient modulus at optimum conditions is 10,000 psi. Estimate the resilient modulus at equilibrium with the environment for this soil. Clearly outline the steps followed and assumptions used to find the answer.
A 1.6-KG SOIL SPECIMEN HAS A VOLUME OF 1X10-3 M3 AND MOISTURE CONTENT OF 12%. SPECIFIC GRAVITY OF SOIL SOLIDS IS 2.5.(a) WHAT IS THE DRY DENSITY OF THIS SOIL?(b) WHAT IS THE VOID RATIO OF THIS SOIL? (c) WHAT IS THE DEGREE OF SATURATION?
Question: For a given soil, the following are known: Percentage passing No. 4 sieve = 100 Percentage passing No. 200 sieve =61 Liquid limit = 26 Plastic Index =6 Classify the soil using the Unified Soil Classification System. Give the group symbol and the group name.
A soil sample having a volume of 1 x 10^-3 m^3 has a mass of 1950 grams and moisture content of 10%. The specific gravity of the soil solids is 2.66. What is the value of the dry density of the soil? What is the value of the void ratio? What is the value to the degree of saturation?
A fine-grained soil (no sand) is found to have a liquid limit of 70 percent and a plastic limit of 38 percent. (a) What do the percentages for these limit values represent? (b) What is the plasticity index for this soil? (c) On the plasticity chart for the Unified Soil Classification System, what soil type is this? (d) On the plasticity chart for the AASHTO classification system, what soil type is this?
Answer the following: a) What is the difference between the U-line and the A-line on a plasticity chart? b) What is the dividing point between silts and clays on a plasticity chart? c) What is the dividing point between low, medium, and high plasticity on a plasticity chart? d) An inorganic soil has a Liquid Limit of 55 and a Plastic Limit of 30. Using the plasticity chart determine the relative classification for this soil.
Define the following properties of soil: • 1 Liquid Limit • 2 Plastic Limit 3 Plasticity Index
4.1.4 A soil has a bulk unit density of 1.91 Mg/m3 and a water content of 9.5%. The value of Gs = 2.7. Calculate the void ratio and degree of saturation of the soil. What would be the values of density and water content if the soil were fully saturated at thesame void ratio.
A 1-ft3 sample of undisturbed soil is found to have a dry weight of 107 lb. If the specific gravity of soil solids is 2.70, what is the void ratio of the sample? What is the porosity?