The three sands side by side
| M-Sand | P-Sand | Crusher dust | |
|---|---|---|---|
| Also called | Manufactured sand, concrete sand, எம் சாண்ட் | Plastering sand, பி சாண்ட் | Quarry dust, stone dust, கிரஷர் டஸ்ட் |
| Size | 0–4.75 mm | 0–2.36 mm | 0–4.75 mm |
| Washed | Yes | Yes | No |
| Grading | IS 383:2016 Zone II | IS 1542 plaster sand (IS 383 Zone III/IV) | Not controlled |
| Fineness modulus | 2.6–2.9 | About 1.8–2.4 | Not controlled |
| Use it for | RCC, ready-mix, precast, masonry mortar | Wall and ceiling plaster, pointing, fine mortar, tile bedding | Paver bedding, pipe bedding, trench backfill, plinth filling, block making |
| Never use it for | Smooth plaster finishes | Structural concrete | Concrete or plaster |
| MT per unit (100 cft) | ≈ 4.75 | ≈ 4.6 | ≈ 4.8 |
| Ex-works rate | ₹525 per MT | ₹680 per MT | ₹450 per MT |
Verdict: M-Sand for anything structural, P-Sand for any surface you will see finished, crusher dust for anything buried, bedded or compacted. Buying the wrong one costs more in cement and rework than the price gap between them.
P-Sand full form: plastering sand. It is the finer, washed cut of the same crushed granite, made so a 12 mm coat spreads and finishes without pits.
Which sand for which job
| Job | Use | Why |
|---|---|---|
| RCC slab, beam, column, footing | M-Sand | Zone II grading suits the mix design |
| PCC bed under footings and floors | M-Sand, or as your engineer specifies | Same sand as the RCC keeps the order simple |
| Brick and block mortar | M-Sand or P-Sand | P-Sand gives thinner, neater joints |
| Internal wall plaster, 12 mm | P-Sand | Finer grading finishes smoothly |
| External plaster, 18–20 mm | P-Sand | Same reason; laid in two coats |
| Ceiling plaster, about 6 mm | P-Sand | A thin coat needs fine sand |
| Tile bedding and screed | P-Sand | Fine, even bed |
| Paver bedding, 25–40 mm | Crusher dust | Compacts tight and costs less |
| Pipe bedding, trench backfill | Crusher dust | No large stones to press on the pipe |
| Plinth and floor filling | Crusher dust | Compacts to about 2.0–2.15 t/m³ |
| Hollow and solid block making | Crusher dust with 6mm chips | Dust fills the voids between chips |
Mixed loads: Block and paver makers often want 6mm chips, 12mm and crusher dust together. We can load a mixed consignment in your proportions, weigh it and invoice it as one 16–20 MT delivery.
From our team
Notes, photos and examples added by the M&B Chetty team, with the author and the date.
Three mistakes that cost more than the sand
- Crusher dust in a slab. The uncontrolled fines soak up water and cement, the mix bleeds and cube results drop. The saving per tonne is small next to the cost of a weak slab.
- Zone II M-Sand in plaster. The coat stays rough and the mason adds cement and water to make it finish. Use P-Sand.
- Unwashed sand sold as washed. "Double washed" is a sales phrase, not a test result. Do the jar test and ask for the lot's 75-micron figure.
Which is costly, M-Sand or P-Sand?
- P-Sand, ex-works: ₹680 per MT
- M-Sand, ex-works: ₹525 per MT
- Crusher dust, ex-works: ₹450 per MT
P-Sand is screened finer, so it usually sits a little above M-Sand per tonne. The gap between dust and the washed sands is the cost of washing and grading; buy dust for dust jobs, not as cheap sand.
How much of each you will need
- M-Sand for concrete: about 0.7 MT per m³ of M20 concrete; a 1,000 sq ft, 5-inch slab needs about 8 MT.
- P-Sand for plaster: about 0.2 MT per 100 sq ft of 12 mm plaster, so one tonne covers roughly 500 sq ft.
- Crusher dust for paver bedding: a 40 mm bed under 1,000 sq ft of pavers is about 3.7 m³, roughly 6.3 MT.
- Whole house: about 38 MT of M-Sand and 9 MT of P-Sand per 1,000 sq ft of built-up area.
All four are typical estimates; your engineer's quantities govern. Add 5–10% for wastage when you order.