Civil Engineering - Estimating and Costing - Discussion
Discussion Forum : Estimating and Costing - Section 1 (Q.No. 22)
22.
For 12 mm thick cement plastering 1 : 6 on 100 sq.m new brick work, the quantity of cement required, is
Discussion:
43 comments Page 2 of 5.
Jon said:
5 years ago
Why take 30% extra here? Please explain me.
Kaku said:
5 years ago
The correct answer is 0.2228m3.
Hari said:
5 years ago
Why we take 30% extra? Please explain.
Dinesh sunar said:
6 years ago
Area to be plaster = 100m^2.
Thickness of plaster = 12mm = 0.012m.
The volume of plaster = 100x0.012 = 1.2m^3.
Adding 20%of wet volume,
= 1.2+1.2x20% = 1.44m^3.
Increase the wet material by 1/3rd volume in order to get dry volume.
The volume of dry material = 1.44+1.44x1/3.
, ,, = 1.92 m^3.
Now, volume of cement = 1/7x1.92 = 0.274.
Thickness of plaster = 12mm = 0.012m.
The volume of plaster = 100x0.012 = 1.2m^3.
Adding 20%of wet volume,
= 1.2+1.2x20% = 1.44m^3.
Increase the wet material by 1/3rd volume in order to get dry volume.
The volume of dry material = 1.44+1.44x1/3.
, ,, = 1.92 m^3.
Now, volume of cement = 1/7x1.92 = 0.274.
(6)
Jigme said:
6 years ago
Thank you all for explaining the answer, clearly.
Govind said:
6 years ago
Thanks everyone for explaining the solution.
Bharat said:
6 years ago
Thanks all.
Shree said:
6 years ago
Wet mix mortar for uniform layer =12/1000*100 = 1.2 cum.
Adding 30% to fill up joints, uneven surface,
Then, Quantity of Mortar =1.2 + 1.2*30% =1.56 cum.
Increasing 25% the dry volume = 1.56+1.56*25%= 1.95 cum.
Total parts (C:S) = 1+6 =7.
Then, Cement = 1.95/7 = 0.278 Cum = 0.278/0.0347 = 8 Bags Cement required.
Adding 30% to fill up joints, uneven surface,
Then, Quantity of Mortar =1.2 + 1.2*30% =1.56 cum.
Increasing 25% the dry volume = 1.56+1.56*25%= 1.95 cum.
Total parts (C:S) = 1+6 =7.
Then, Cement = 1.95/7 = 0.278 Cum = 0.278/0.0347 = 8 Bags Cement required.
Ramvir singh said:
7 years ago
@All
We will take 60% extra of total Volume for water and joint filling between the bricks. So, 1 for 15mm thick plasters the answer is 0.3428 m3 and For 12 mm thick plaster it is 0.2742 m3.
We will take 60% extra of total Volume for water and joint filling between the bricks. So, 1 for 15mm thick plasters the answer is 0.3428 m3 and For 12 mm thick plaster it is 0.2742 m3.
Matiur Rahaman said:
7 years ago
Given thickness of plaster = 12mm = 12/1000 m = 0.012m.
Ratio (1:6).
Since you have not given assume that 100 sq M of plaster is Done.
Thus volume of plaster = 100 x 0.012 =1.2 cum.
Add 60 % for unevenness of plaster surface and voids.
Total volume of plaster work = 1.2 + 60/100 x 1.2 =1.92 cum.
Volume of cement = 1.92/(1+6) =0.274 cum.
Ratio (1:6).
Since you have not given assume that 100 sq M of plaster is Done.
Thus volume of plaster = 100 x 0.012 =1.2 cum.
Add 60 % for unevenness of plaster surface and voids.
Total volume of plaster work = 1.2 + 60/100 x 1.2 =1.92 cum.
Volume of cement = 1.92/(1+6) =0.274 cum.
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