Gypsum
High-grade natural gypsum for cement setting retardation, plasterboard manufacturing, wall finishing, and agricultural soil conditioning.
Product Overview: Natural Gypsum Mineral
Natural Gypsum (Calcium Sulphate Dihydrate, CaSO4·2H2O) is a versatile, soft sulphate mineral widely used in the construction, cement manufacturing, agriculture, and plaster moulding industries.
Sakthima supplies high-purity natural gypsum rock and pulverized gypsum powder with high purity (purity ≥ 85–92%), ensuring optimal retarding performance in Portland cement and smooth workability in gypsum board and plaster systems.
Key Benefits
Controls Cement Setting
Crucial retarder during cement clinker grinding, preventing flash setting and optimizing early strength development.
Lightweight Plaster Solutions
Serves as raw material for hemihydrate (Plaster of Paris) and ready-mix gypsum plasters for direct wall application.
Natural Fire Resistance
Contains 21% chemically combined water that absorbs thermal energy and slows fire spread in building partitions.
Soil Conditioning & Sulphur Supply
Supplies essential calcium and sulphur nutrients while improving drainage and water infiltration in compact soils.
Smooth Finish & No Cracks
Zero-shrinkage setting behavior delivers mirror-smooth surfaces free from shrinkage hairline cracks.
Applications
Cement Manufacturing (Retarder)
Gypsum Plaster & Drywall
Agricultural Soil Amendment
Ceramic Slip Moulds
Technical Specifications
| Parameter | Pharmaceutical | Plaster Super | Cement Grade A | Cement Grade B | Agricultural |
|---|---|---|---|---|---|
| Calcium Sulfate | 98.5% | 95.0% | 92.0% | 88.0% | 80.0% |
| Combined Water | 20.2% | 19.5% | 18.5% | 17.2% | 15.5% |
| Purity | ≥ 98% | ≥ 95% | ≥ 92% | ≥ 88% | ≥ 80% |
| Moisture Content | < 0.1% | < 0.3% | < 0.6% | < 1.0% | < 2.5% |
| Silica (SiO2) | 0.15% | 0.45% | 0.85% | 1.50% | 3.50% |
| Fe2O3 + Al2O3 | 0.08% | 0.22% | 0.45% | 0.85% | 1.80% |
| pH Level | 7.2 | 7.0 | 7.0 | 6.8 | 6.5 |
| Mesh Size | 200 Mesh | 150 Mesh | 100 Mesh | Crushed | Granular |
Why Choose Us?
High-Grade Mineral Deposits
Direct sourcing from established mines ensuring low chloride, fluoride, and acid insoluble contaminants.
Multiple Supply Forms
Available in lump form (0–50mm) for cement plants and finely ground powder (100–200 Mesh) for plaster manufacturing.
Consistent Moisture Control
Controlled surface moisture ensuring free-flowing handling and optimal grinding efficiency.
Bulk Delivery Capability
Equipped to supply bulk rail rakes and multi-axle truckloads on contract schedules.