2.11 The following results were obtained from sieve analyses of two soils: Sieve no. Opening (mm) Soil A Soil B 4 4.75 10 2.00 20.2 48.2 20 0.85 25.7 19.6 40 0.425 0.15 40.4 60.3 100 18.1 37.2 200 0.075 27.2 22.1 Pan 68.2 5.6 Hydrometer tests of these soils give the following re- sults: Soil A, % finer than 0.002 mm = 48%; Soil B, % finer than 0.002 mm = 2%. %3D (a) Plot the gradation curve for each soil on the same graph. (b) How much coarse-grained and fine-grained soils are in each soil? (c) What are the percentages of clay and silt in each soil?
2.11 The following results were obtained from sieve analyses of two soils: Sieve no. Opening (mm) Soil A Soil B 4 4.75 10 2.00 20.2 48.2 20 0.85 25.7 19.6 40 0.425 0.15 40.4 60.3 100 18.1 37.2 200 0.075 27.2 22.1 Pan 68.2 5.6 Hydrometer tests of these soils give the following re- sults: Soil A, % finer than 0.002 mm = 48%; Soil B, % finer than 0.002 mm = 2%. %3D (a) Plot the gradation curve for each soil on the same graph. (b) How much coarse-grained and fine-grained soils are in each soil? (c) What are the percentages of clay and silt in each soil?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:2.11 The following results were obtained from sieve analyses
of two soils:
Sieve no.
Opening (mm)
Soil A
Soil B
4
4.75
2.00
0.85
10
20.2
48.2
20
25.7
19.6
0.425
0.15
40
40.4
60.3
100
18.1
37.2
200
0.075
27.2
22.1
Pan
68.2
5.6
Hydrometer tests of these soils give the following re-
sults: Soil A, % finer than 0.002 mm = 48%; Soil B, %
finer than 0.002 mm = 2%.
(a) Plot the gradation curve for each soil on the same
graph.
(b) How much coarse-grained and fine-grained soils
are in each soil?
(c) What are the percentages of clay and silt in each
soil?
(d) Determine Djg for each soil.
(e) Determine the uniformity coefficient and the coef-
ficient of concavity for each soil.
() Describe the gradation curve (e.g., well graded) for
each soil.
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