Limestone
Solid Strength. Industrial Purity
Didwaniya Group supplies high-quality limestone—carefully sourced and processed—to meet industrial, construction, and agricultural specifications worldwide. Our limestone offerings deliver consistent chemical composition and mechanical properties, making them ideal for cement manufacture, steel fluxing, road base, and soil conditioning applications.
Limestone (Calcium Carbonate, CaCO₃) is a sedimentary rock composed primarily of calcite. It forms the backbone of many industries due to its high calcium content and predictable performance in thermal and chemical processes. Typically occurring in massive beds or layered strata, limestone is quarried and processed into a range of products from large dimension stone to crushed aggregates and finely ground powders. Its versatility, stability, and abundance make it a preferred raw material for cement production, lime manufacture, glass, and as a neutralizing agent in environmental applications.
Limestone is quarried from carefully selected deposits with attention to geological uniformity and minimal detrimental impurities. Depending on the grade required, our product is beneficiated, screened, and washed to meet customer specifications for particle size, purity and physical strength. For cement and lime industries, limestone with high CaCO₃ content and low silica/impurity levels is prioritized; for construction aggregates, mechanical hardness and angularity are emphasized. Didwaniya Group ensures batch traceability, consistent quality control, and logistics solutions tailored to global buyers.
Characteristics
Chemical Composition (Calcium Carbonate, CaCO₃), approx.: 75–99% (depending on grade; high-purity chemical grade ≥ 95%).
Magnesium Carbonate (MgCO₃), approx.: trace to 5% (depends on deposit).
Silica (SiO₂), approx.: typically ≤ 3–8% for high-grade material.
Appearance (Structure): Massive to bedded rock; colour ranges from white, cream, to light grey depending on impurities.
Hardness (Mohs): ~3–4 (varies by formation).
Specific Gravity (Apparent): ~2.6–2.8.
Bulk Density (crushed/aggregate): approx. 1.4–1.8 t/m³ depending on particle size and compaction.
Mass fraction of moisture, %, not more than: 2.0% (powder/processed product — typical maximum).
Loss on Ignition (LOI), %: indicative of carbonate content; varies with CaCO₃ purity.
Particle Size: Supplied as dimension stone, crushed aggregates (various sizes), or ground powder (micronized) per customer specification.
Typical Impurities: Clay, silt, iron oxides, silica — levels controlled per grade requirements.
Application
Didwaniya Group limestone finds use across multiple sectors: as a primary raw material for cement and quicklime production; as a flux in metallurgical processes (steel and iron); in glass and ceramic formulations; as construction aggregate for road base, concrete and asphalt; and in agriculture as soil conditioner and pH regulator. Additionally, finely ground limestone is used for flue-gas desulfurization, water treatment, and as filler in plastics, paints and paper.
Storage Condition
Store limestone in clean, dry, and well-drained yards or covered warehouses to prevent contamination and prolonged exposure to moisture. Segregate different grades and particle sizes to avoid cross-contamination; cover stockpiles where necessary to minimize dust and weathering. For powdered limestone, use sealed, moisture-resistant packaging and maintain relative humidity as low as feasible to preserve flowability and prevent caking.