Sepahan Export Cement

Sepahan Export Cement – Portland Type 2 (II 42.5)

Sepahan Export Cement Type 2 (II 42.5) is a precision-engineered, export-standard product from Iran, produced in accordance with Iran National Standard ISIRI 389, ASTM C150 Type II, and EN 197-1 CEM II/A-M 42.5 N. This cement is designed for projects requiring enhanced durability against moderate sulfate attack and controlled heat of hydration, while also meeting strict compressive strength requirements.

The product is manufactured with a precise combination of raw materials and carefully proportioned minerals, with a maximum C3A content of 8%, a key parameter for improving sulfate resistance.

Physical Properties of Sepahan Export Cement

✅ Fineness (Blaine): 3200 m²/kg – ensures better workability and controlled hydration of concrete.

⏱ Setting Time:

• Initial: 150 minutes
• Final: 210 minutes
  This range provides an optimal balance between construction speed and temperature control, especially for mass concrete pours.

💪 Compressive Strength:

• 2 days: 20 – 25 MPa
• 7 days: 28 – 30 MPa
• 28 days: 42 – 45 MPa

These values indicate that Sepahan Type 2 Cement, contrary to common assumptions about blended cements, maintains high strength and delivers fully standard export-grade performance in the 42.5 class.

Chemical Properties of Sepahan Export Cement

🧪 Official factory analysis:

• SiO2: 20.50%
• Al2O3: 4.50%
• Fe2O3: 3.60%
• CaO: 62.75%
• MgO: 3.25%
• Cl: 0.01%
• SO3: 2.50%
• LOI: 1.00%
• IR: 0.70%
• Free CaO: 1.00%
• Total Alkalis: 0.80%
• C3A: 8.0%

⚡ Key points from the chemical composition:

• Very low chlorine (0.01%) – crucial for structures exposed to corrosion.
• Low alkalies (0.80%) – reduces risk of alkali-silica reaction in concrete.
• SO3 within standard limits – ensures proper setting and hardening.
• Low Free CaO – indicates complete clinker formation and reduced cracking potential.

Engineering Applications

🌍 Moderate Sulfate Environments

• Water sulfate < 1200 ppm
• Soil sulfate < 0.5%

🏗 Mass Concrete Pouring
Ideal for foundations, thick retaining walls, dams, or semi-heavy structures due to lower heat of hydration.

☀️ Hot Climates
Performs well where temperature rise in concrete is a concern.

Situations Not Recommended

⚠️ Environments with both chloride and sulfate exposure (e.g., docks)
⚠️ Cold weather concreting due to prolonged setting time
⚠️ Structures needing very rapid strength gain (lower early strength than Type 1)

Summary

Sepahan Portland Cement Type 2 is a high-quality export-grade product with consistent performance, precise chemical analysis, and compliance with international standards. Its controlled C3A content, suitable strength, and lower heat of hydration make it a smart choice for foundations, general structures, hot regions, and moderate sulfate environments. The product is fully competitive in export markets, delivering 42.5-class performance according to global standards.