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In Earth work compaction
How u calculate
How many liters of water required,for compaction of ordinary
soil for one Cu.m.
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Answer Posted / hiren n. thakkar
Determination of Water to Be Added
If the moisture content of the soil is less
than optimum, the amount of water to be
added for efficient compaction is generally
computed in gallons per square yards. The
computation is based on the dry weight of soil
contained in a compacted layer. For example,
assume that the soil is to be placed in 6-inch,
compacted layers at a dry weight of 120 pcf.
The moisture content of the soil is determined
to be 5 percent while the OMC is 12 percent.
Assume that the strip to be compacted is 40
feet wide. Compute the amount of water that
must be added per 100-foot station to bring
the soi1 to optimum moisture. The following
formula applies:
{Desired Density (pcf)x W(desired)-W (actual)/100}x Vol.
(cu.ft)x 1gal./8.33lb
Substituting in the above formula from the
conditions given:
[120(pcf)x 12-5/100]x 100ft x 40ft x 0.5ft x 1gal/8.33lb
= 2017 gal/station.
If either drying conditions or rain conditions
exist at the time work is in progress, it may be
advisable to either add to or reduce this quantity
by up to 10 percent.
Substituting in the above formula from the
conditions given:
If either drying conditions or rain conditions
exist at the time work is in progress, it may be
advisable to either add to or reduce this quantity
by up to 10 percent.
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