A certain saturated sand (S = 100%) has a moisture content of 27.9% and a specific gravity of solids of 2.61. It also has a maximum index void ratio of 0.90 and a minimum index void ratio of 0.33. Compute its relative density and classify its consistency. (Table on the right) Solution: . Given the values of mmoisture content, specific gravity and degree of saturation, the void ratio can be estiamted as: e = • Thus the relative density is found to be D, = . According to the table, the soil is classified as %; + soil. ; TABLE 3.3 CONSISTENCY OF COARSE-GRAINED SOILS AT VARIOUS RELATIVE DENSITIES (data from Lambe and Whitman, 1969) Relative Density, D%) 0-15 35-65 Classification Very loose Medium dense Deme Very dense Labe and Whitnused the term "medium" but "medium dense” is berbec "mally refers to the particle size distribution.
A certain saturated sand (S = 100%) has a moisture content of 27.9% and a specific gravity of solids of 2.61. It also has a maximum index void ratio of 0.90 and a minimum index void ratio of 0.33. Compute its relative density and classify its consistency. (Table on the right) Solution: . Given the values of mmoisture content, specific gravity and degree of saturation, the void ratio can be estiamted as: e = • Thus the relative density is found to be D, = . According to the table, the soil is classified as %; + soil. ; TABLE 3.3 CONSISTENCY OF COARSE-GRAINED SOILS AT VARIOUS RELATIVE DENSITIES (data from Lambe and Whitman, 1969) Relative Density, D%) 0-15 35-65 Classification Very loose Medium dense Deme Very dense Labe and Whitnused the term "medium" but "medium dense” is berbec "mally refers to the particle size distribution.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A certain saturated sand (S = 100%) has a moisture content of 27.9% and a specific gravity of solids of 2.61. It also has a maximum index void ratio of 0.90 and a minimum index void ratio of
0.33. Compute its relative density and classify its consistency. (Table on the right)
Solution:
Given the values of mmoisture content, specific gravity and degree of saturation, the void ratio can be estiamted as: e =
Thus the relative density is found to be Dr
=
• According to the table, the soil is classified as
%;
soil.
TABLE 3.3 CONSISTENCY OF COARSE-GRAINED
SOILS AT VARIOUS RELATIVE DENSITIES (data
from Lambe and Whitman, 1969)
Relative Density, D,(%)
0-15
15-35
35-65
65-85
85-100
Classification
Very loose
Loose
Medium denseª
Dense
Very dense
"Lambe and Whitman used the term "medium," but "medium dense" is
better because "medium" usually refers to the particle size distribution.
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