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Figure 5. Percent solids by weight as a function of water content |
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 ERDC TN-DOER-D1
August 2004
Another useful relationship is the percent solids by weight as a function of water content, illus-
trated in Figure 5.
Figure 5. Percent solids by weight as a function of water content
The general equation for percent solids by weight is
% solids by weight = 10000 / (W+100)
(10)
where W = water content percent
To convert percent solids by weight to percent solids by volume, the specific gravity needs to be
known. An approximate conversion without knowing the specific gravity is
Solids concentration by volume, grams/liter ~ 10 x % solids by weight
(11)
Other conversions for solids content are given in EM 1110-2-5027 (Department of the Army
1987). Several geotechnical parameters may also be calculated using phase relationships found
in soil mechanics textbooks such as Bardet (1997).
Methods for predicting unknown engineering behavior properties. For determining
undrained shear strength knowing only the water content and liquid limit of the material, an
approximate equation is:
Vane shear strength psf = 183 e 2.3714(W/LL)
(12)
where
10
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