Opening your workspace…
Start with the whole masonry volume, subtract the solid bricks, then apply the mortar ratio and dry-volume factor for the job.
Follow the method, check the example and review the assumptions.
Wet mortar = masonry volume − solid brick volume. Dry ingredients = wet mortar × dry factor, split by the cement:sand ratio.
If 500 bricks occupy 0.7695 m³ inside 1 m³ masonry, wet mortar is 0.2305 m³ before the editable dry-volume factor.
This illustrates the method; your inputs determine your result.Masonry volume includes both bricks and joints. The remaining wet volume is the space occupied by mortar.
No. It is an editable planning default; use the ratio required by the project specification.