Answer Posted / arvind vyas

The size of brick be 230mm x 115mm x 75mm
Vol.of brick( w/o mortar) = 0.00198 cum.
Thk.of mortar be 12mm.
vol.of brick with mortar = 242mm x 127mm x 87mm = 0.00267
cum.
No.of bricks in 1 cum. with mortar = 1/0.00267 = 373.99
Say = 374 bricks.
Cement Mortar required = 1-(374 x 0.00198) cum= 0.259 cum.
Say 0.26 cum
Add 15% for frog filling and wastage while execution.
Vol. of wet mortar = 0.299 cum.
Vol. of dry mortar (increase by 30%) = 0.388 cum.
For CM of 1:6
Qty. of cement = 1/7 x (1440 x 0.388) = 0.055 cum.
Qty. of sand = 0.055 x 6 = 0.330 cum

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