PLASTER WORK CALCULATION
1. PLASTER
WORK ESTIMATION
 |
| A man is plastering a brick wall |
The amount
of cement mortar required for 1m2 coverage on wall for a plaster work.
Let the thickness
of the plaster for one coat external rendering be 15mm.
The volume
of a plaster per square meter is given as shown below
Volume =
1m x 1m 0.015m
= 0.015m3
The dry volume
of cement mortar for plaster can be calculated as follows
Dry volume
= Wet volume x Wet to dry conversion factor (1.25 - 1.3)
= 0.015 x 1.30
= 0.0195m3
The mortar
constituents can be calculated based on the cement sand mix ratio for example
in our calculation we will use mix ratio 1:4 (cement: sand).
The cement
volume can be calculated as shown below
Firstly 1+4
= 5 (division number)
Then,
for cement we have 1/5 x 0.0195 = 0.0039m3
For sand
also can be calculated as follows
Sand volume 4/5 x 0.0195 = 0.0156m3
For wall area other than 1m2 we have to
multiply the quantity obtained above for 1m2 with new area then, we
get the quantity of new area.
For example
If we do have
a room of 42m2 as the wall area its cement plaster quantification
will be as follows.
Quantity of
cement = quantity per 1m2 x measured
wall area
= 0.0039x
42
= 0.1638 m3
Quantity of sand
= quantity per 1m2 x measured wall area
= 0.0156x
42
=
0.6552 m3
The volume of plaster constituents (cement and sand)
can be different per 1m2 due to different in mix ratio
and thickness of the plaster.
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