Calculation of number of bricks & quantity of cement & sand in mortar.
Mortar thickness = 10 mm
Ratio = 1:6 (cement:sand)
Volume considered = 1 m3
MODULAR BRICK ( 190 mm X 90 mm X 90 mm )
Volume of 1 brick with mortar :
= 200 mm x 100 mm x 100 mm
= 0.2 m x 0.1 m x 0.1 m
= 0.002 cu.m.
No. of bricks in 1 cu.m. = (1 / 0.002) = 500 nos.
Volume of 1 brick without mortar:
= 0.19 m x 0.19 m x 0.09 m
= 0.001539 cu.m.
Volume covered by 500 no. of bricks
= 500 x 0.001539 cu.m.
Volume of mortar
= 1 – 0.7695
= 0.2305 cu.m. (in wet condition)
Dry volume of mortar
= 0.2305 x 1.33 ………..(33% perecentage)
= 0.306565 cu.m.
Cement = 0.306565 x (1/7) x 1440
= 63 kg say 1.26 bags
Sand = 0.306565 x (6/7) x 35.3147
= 9.28 cu.ft.
