Calculation of brick,cement & sand in Brick masonry

Before starting learn these facts:

SNNature of workType of mortar
1.Exposed and water logged areasCement or lime mortar of 1:3
2.Damp proof courses and cement concrete roadsCement mortar of 1:2
3.For RCC works like staris, slab, pillar, lintels,etc.Cement mortar of 1:3, the concrete mix of 1:2:4
4.For internal and less important work.Lime cinder mortar of 1:3, cinder or ashes is used in place of sand.
5.For Fire Bricks1:2 ratio of aluminous and crushed fine powder of fire bricks
6.For Parapet & Partition wallCement mortar of 1:3 or Lime mortar of 1:1
7.Plastering workCement mortar of 1:3 to 1:4 or lime mortar of 1:2
8.Pointing workCement mortar of 1:1 to 1:2
9.Reinforced brickworkCement mortar of 1:3
10.Stone masonry with best quality stonesLime mortar of 1:2, eminently hydraulic lime.
11.Stone masonry with simple or ordinary stones, bricks,etcLime mortar of 1:2 or cement mortar of 1:6, eminently hydraulic lime.
12.For brickwork with thin jointsLime mortar of 1:3, fat lime is used.

Assumptions Done

Standard Brick Size : 190mm * 90mm * 90 mm

Standard Brick volume without mortar = 0.19* 0.09 * 0.09 = 0.001539 cub.m

We assume 10 mm for thickness of mortar

Brick size with mortar : (190+10) mm * (90+10) mm * (90+10) mm

1). Brick calculation 

take brick size = 200mmx100mmx100mm

convert in meter =0.2mx0.1mx0.1m

total volume of one brick with mortar = 0.2×0.1×0.1=0.002 cub.m

calculate the numbers of brick for 1cub.m = 1cub.m / 0.002cub. m = 500 numbers of bricks.

MORTAR

Total volume of brick = 500 * 0.001539 = 0.7695 cub.m

Volume of Mortar Required = 1- 0.7695 = 0.2305 cub. m

cement : sand ratio = 1 : 5
sum = 1+5 = 6

Total Wet volume of mortar = 0.2305 cub.m

total dry mortar requried for 1 cub.m brick masonary= 0.30 cub. m ( Dry volume is 33% more than wet volume of mortar )

2). cement calculation

cement = ( 0.30 x 1 ) / 6 = 0.05 cum
convert in KG or mass = 0.05 x 1440 =72KG
convert in cement bag= 72/50 = 1.44bag.

3. sand calculation

sand = ( 0.30 x 5 ) / 6 = 0.25cum
convert in kg = 0.25 x 1440 = 360Kg.

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