Determination
of compacting factor concrete by C.F apparatus to measure the workability of
concrete.
1.
Eqpt/Materials
The
compacting factor apparatus complete steel trowels scoop tamping rod or
vibrating
Machine
weighing balance.
2.
Procedure
a.
The
sample of conferee to the fasted shall be placed gently in the upper hopper
using the scoop unit the hopper is filled.
b.
Then
the trap door shall be opened immediacy after the filling so that the conferee
falls into the lower hopper.
c.
The
trap door of lower hopper is opened and the concrete is allowed to fail in to
the cylinder.
d.
The
Weight of concrete in the cylinder shall the be determined to the realest of 10
gram. This weight shall be known as the weight of partially compacted concrete.
e.
Now
put the cylinder on the vibrating machine and start vibration.
f.
The
cylinder shall then be filled with conferee from the sample, so as to obtain
full compaction.
g.
The
weight of concrete in the cylinder shall again be determine to the nearest of
10 grams. This weight shall be known as ,, The weight of fully compaction
concrete,,
h.
Calculate
the compacting factor from:
CF=
partially compaction concrete fully compacted concrete.
3.
Detailed of
reading and obsns/data to be recorded.
a.
Water cement ration =
b. Mix proportion =
c. Weight of cylindrical Mold = 31.45 gm
d. Volume of cylindrical Mold = 5000
mi
4.
The Performa /
Format for prep with record of obsns data with notes to help completion
|
S/No
|
Wt of cylinder before compaction
|
Loose density
|
Wt of cylinder after compaction
|
Compacted Density
|
C.F=
Loose Density
Compacted
Density
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1
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2
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3
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4
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5
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5.
Interpretation /
collation of the obsns reading graphs,
et leading to results.
To
be done with the standard specification of ASTM and B.S
6.
Comments
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