A Classify the soil samples shown below using AASHTO and USCS systems: Sieve No. 4 10 20 40 60 100 200 LL PL A 68.5 - 36.1 21.9 34.1 16.5 Soil, % passing B - 79.5 69.0 54.3 53.5 31.6 C 69.3 59.1 48.3 38.5 28.4 19.8 4.5 Non-plastic (NP)

A Classify the soil samples shown below using AASHTO and USCS systems: Sieve No. 4 10 20 40 60 100 200 LL PL A 68.5 - 36.1 21.9 34.1 16.5 Soil, % passing B - 79.5 69.0 54.3 53.5 31.6 C 69.3 59.1 48.3 38.5 28.4 19.8 4.5 Non-plastic (NP)

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Soil classification and characteristics

Soil classification is a method of categorizing soil based on its properties, types, and uses. The motive of soil classification is to arrange various types of soils and divide them into groups for various engineering and agricultural purposes. Soil classification is carried out by various agencies as per their purposes. From an engineering perspective, soil classification is done to find out the suitability of soil for various construction purposes like the construction of dams, foundations, highways, infrastructures, and so on. For engineering purposes, the soil is classified by the following systems:

Question

A Classify the soil samples shown below using AASHTO and USCS systems:
Sieve No.
4
10
20
40
60
100
200
LL
PL
A
-
68.5
-
36.1
21.9
34.1
16.5
Soil, % passing
B
.
79.5
69.0
-
54.3
53.5
31.6
C
69.3
59.1
48.3
38.5
28.4
19.8
4.5
Non-plastic
(NP)

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