- 2081 Baisakh · 5 marks
Materials for 5 m³ stone masonry 1:6
Short answer
Stone required is 1.2 times masonry volume, and wet mortar is 30% of masonry, dry factor 1.30. For 5 m3, stone = 6.0 m3, cement = 8.0 bags (0.279 m3), sand = 1.67 m3.
Calculate quantity of materials required for 5 m³ of stone masonry in 1:6 cement sand mortar ratios.
Assumptions
For rubble stone masonry in cement mortar: stone required = 1.2 m³ per m³ of masonry (stone is measured as stacked volume, which includes voids, plus an allowance for wastage); wet mortar = 30% of the masonry volume; and dry volume of mortar = 1.30 x wet volume.
Calculation for 5 m³
- Stone = 1.2 x 5 = 6.00 m³
- Wet mortar = 0.30 x 5 = 1.50 m³
- Dry mortar = 1.50 x 1.30 = 1.950 m³
- Mortar ratio 1:6 (sum 7):
- Cement = 1.950/7 = 0.2786 m³ x 1,440 kg/m³ = 401.1 kg = 8.02 bags (50 kg)
- Sand = 1.950 x 6/7 = 1.671 m³
Answer: Stone = 6.0 m³; cement = 8.0 bags (0.279 m³); sand = 1.67 m³.
✓ Answer checked by Claude Opus 5.5 (high effort)
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