Pure calcium sulfate, sized to spec.
Gypsum
Natural gypsum for cement retarding, plaster and board.
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- Purity up to 95 % CaSO₄·2H₂O
- Crushed & screened to size
- Bulk or jumbo bags
Overview
Natural gypsum (calcium sulfate dihydrate) is an essential set-retarder in cement grinding and the raw material for plaster and gypsum board.
We supply high-purity gypsum lumps and crushed grades from established quarries, screened to the size range your mill or kiln requires.
Available grades
- Cement-grade gypsumLumps for use as a set-retarder in cement grinding.
- Plaster / board-grade gypsumHigh whiteness and purity for calcining.
- Agricultural gypsumSoil conditioner supplying calcium and sulfur.
Typical properties — cement-grade gypsum
| Purity (CaSO₄·2H₂O) | 85 – 95 % |
|---|---|
| Sulfur trioxide (SO₃) | ≥ 40 % |
| Combined water | ≥ 18 % |
| Free moisture | ≤ 3 % |
| Chloride (Cl⁻) | ≤ 0.02 % |
| Size range | 0–50 / 10–50 / 20–80 mm |
Specifications shown are typical values. Final specifications, tolerances and test methods are confirmed in each contract.
