Number of bricks for 10m³ of brickwork = 500 × 10 = 5000
Volume of 1 brick (in cm³) = 19 cm × 9 cm × 9 cm = 1539 cm³
Volume of 5000 bricks (in m³) = 5000 × 1539 × 10-6 = 7.695 m³
So, volume of actual mortar = 10 – 7.695 = 2.305 m³
Increase wet volume by 30% to take effect of bulking, shrinkage in account
Hence, Dry volume of mortar = 1.3 × 2.305 = 3 m³