MOISTURE CONTENT OF THE AGGREGATE
Aggregate like many other granular material has the
ability to retain water both begin and between its particle. The moisture content is the ratio of the mass
of water to the mass of dry aggregate, express has a percentage the simplest
method of determining the moisture content is to weight the sample of the
aggregate in mixed dam state, and also after it has happen completely dry in
oven . If the masses obtained are m1,
m2
Moisture
content = Mass of water × 100%
= (m1 - m2) ×100%
Mass of dry
aggregate m2
Silt and clay fractions, and
1.5MPa and air-dry water contents for the 12 soil texture classes.
Texture
|
Silt
|
Clay
|
W-1.5
(kg/kg)
|
Wad
(kg/kg)
|
Sand
|
0.05
|
0.03
|
0.008
|
0.003
|
Loamy sand
|
0.12
|
0.07
|
0.015
|
0.005
|
Sandy loam
|
0.25
|
0.10
|
0.045
|
0.015
|
Sandy clay loam
|
0.13
|
0.27
|
0.143
|
0.048
|
Loam
|
0.40
|
0.18
|
0.106
|
0.035
|
Sandy clay
|
0.07
|
0.40
|
0.204
|
0.068
|
Silt loam
|
0.65
|
0.15
|
0.098
|
0.033
|
Silt
|
0.87
|
0.07
|
0.075
|
0.025
|
Clay loam
|
0.34
|
0.34
|
0.174
|
0.058
|
Silty clay
loam
|
0.58
|
0.33
|
0.166
|
0.055
|
Silty clay
|
0.45
|
0.45
|
0.204
|
0.068
|
Clay
|
0.20
|
0.60
|
0.234
|
0.078
|
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