How much cement
& coarse sand is used in 1 Sqm plaster for ratio 1:4 of thickness 20 mm ?
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Answer Posted / piyush singh
Find the volume of the mortar by multiplying the area with the thickness in CUM unit
Volume = Area * Thickness
= 1 sqm * (20/1000) m
= 0.02 cum
Now increase the volume by 20% for filling of the joints
New Volume = 1.2*0.02 = 0.024 cum
Again increase the volume by 33 % for dry volume as given volume is wet volume
Dry volume = 1.33 * wet volume
= 0.03192 cum
Now Mix proportion is 1:4 so in every 5 part of the volume 1 part is of cement and 4 part is of aggregate so
Volume of cement = 0.03192 / 5
= 0.006384
Bags of cement = 0.006384 / 0.035
= 0.1824 bags
= 9.12 Kg
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