Technical Specifications: High-Performance Clinker & Cement
As the "Economic Engine" of the CemMatrix.com network, PakistanCem.com provides materials that meet and exceed ASTM C150 (North American) and EN 197-1 (European) standards. Our 2026 production is characterized by superior grindability and rapid strength gain, making it the ideal feedstock for high-volume infrastructure projects.
💎 The 2026 Mineralogical Advantage
The limestone sourced for PakistanCem production is globally recognized for its low level of impurities. This allows us to produce a clinker with a high Lime Saturation Factor (LSF), ensuring that every ton of cement produced from our clinker reaches peak performance.
Chemical Composition (2026 Average Analysis)
Chemical PropertyStandard LimitPakistanCem TypicalLime ($CaO$)-65.0% – 66.8%Silica ($SiO_2$)-21.0% – 22.5%Alumina ($Al_2O_3$)-4.8% – 5.4%Iron Oxide ($Fe_2O_3$)-3.0% – 3.6%Magnesium Oxide ($MgO$)Max 6.0%0.8% – 1.4%Sulphuric Anhydride ($SO_3$)Max 3.5%0.4% – 0.6%Insoluble Residue (IR)Max 0.75%0.15% – 0.25%
🔬 Bogue Phase Composition
Our 2026 clinker is engineered for versatility. Whether you are producing Ordinary Portland Cement (OPC) or Sulfate Resistant Cement (SRC), our mineralogical profile provides the perfect base.
Tricalcium Silicate ($C_3S$): 60.0% – 64.0% — Ensures high 2-day and 7-day strength.
Dicalcium Silicate ($C_2S$): 14.0% – 18.0% — Guarantees long-term durability and late-age strength gain.
Tricalcium Aluminate ($C_3A$): 7.0% – 9.0% — Balanced for optimal setting times (SRC variants available at < 5%).
Tetracalcium Aluminoferrite ($C_4AF$): 9.0% – 11.0% — Provides chemical stability and consistent color.
Technical Note: PakistanCem clinker features an Alkali Equivalent ($Na_2O + 0.658 K_2O$) of less than 0.55%, significantly reducing the risk of Alkali-Silica Reaction (ASR) in concrete.
🏗️ Physical Performance Standards (OPC 52.5N)
When ground to a fineness of 3,800 - 4,200 $cm^2/g$ (Blaine), our cement exhibits the following strength characteristics:
Compressive Strength (2 Days): $\geq$ 25 MPa
Compressive Strength (28 Days): $\geq$ 58 MPa
Initial Setting Time: 110 – 140 Minutes
Final Setting Time: 180 – 220 Minutes
Soundness (Le-Chatelier): 0.5 – 1.5 mm
🛡️ The CemMatrix Quality Passport (CQP)
In 2026, every shipment from PakistanCem.com is integrated with the CemMatrix Digital Quality Passport. This ensures:
XRF & XRD Verification: Real-time chemical and mineralogical data provided for every vessel before it leaves Karachi or Gwadar.
Grindability Index: We provide the Bond Work Index (BWI) for our clinker, allowing your grinding station to optimize power consumption and maximize throughput.
WHR Carbon Offset: Each batch is tagged with its Waste Heat Recovery data, verifying the reduced carbon intensity of the production cycle.
📧 Technical Consultation
Need a custom Silica Modulus (SM) for a specific dam project or maritime infrastructure? Our Karachi-based laboratory team can adjust the raw mix to meet your project's unique chemical requirements.