EN 197-1 Cement
CEM I 52,5 N Portland Cement
High-strength Portland cement for demanding structural work.
Description
A high-performance Portland cement engineered for demanding structural applications, providing superior 28-day compressive strength and excellent durability for critical infrastructure.
Application Areas
- Long-span bridges and high-rise structural cores
- High-strength precast and prestressed elements
- Industrial and marine engineering projects
- Specialty grouts and repair mortars
Sales Form / Packaging
- 25–50 kg bags
- 1.5 t sling bag
- 1.5–2 t stretch hood
- 1.5 t big bag
- Bulk vessel / silo truck
Usage Conditions
- Use within 90 days of production date for optimal performance.
- Mix with potable water and clean aggregates conforming to EN 12620 / ASTM C33.
- Do not use cement that has hardened or formed lumps.
Storage
- Store in a dry, covered area protected from moisture and direct sunlight.
- Stack bags on wooden pallets, no more than 10 bags high.
- Rotate stock on a first-in, first-out basis.
Technical Specifications
Chemical Requirements
| Property | Unit | Standard Limit | Test Results |
|---|---|---|---|
| SiO₂ | % | — | 18.70–21.60 |
| Al₂O₃ | % | — | 4.00–6.50 |
| Fe₂O₃ | % | — | 3.20–4.70 |
| CaO | % | — | 61.70–66.60 |
| MgO | % | — | 1.00–3.70 |
| SO₃ | % | Max 4.00 | 2.00–3.25 |
| Cl | % | Max 0.10 | 0.0010–0.0400 |
| Loss on Ignition (LOI) | % | Max 5.00 | 0.70–3.00 |
| Insoluble Residue | % | Max 5.00 | 0.05–1.00 |
| Free CaO | % | — | 0.30–3.00 |
| Cr (VI) | ppm | — | 2–30 |
| Na₂O | % | — | 0.02–0.32 |
| K₂O | % | — | 0.30–1.10 |
| Na₂O Eq. | % | — | 0.30–0.90 |
| Lime Saturation Factor (LSF) | – | — | 96.00–105.30 |
| Silica Modulus (SM) | – | — | 1.90–2.50 |
| Alumina Modulus (AM) | – | — | 0.90–2.00 |
Physical & Mechanical Requirements
| Property | Unit | Standard Limit | Test Results |
|---|---|---|---|
| Specific Gravity | g/cm³ | — | 3.11–3.21 |
| Specific Surface (Blaine) | cm²/g | — | 3600–4500 |
| Residue on 0.045 mm | % | — | 0.1–2.0 |
| Residue on 0.090 mm | % | — | 0.0–1.0 |
| Initial Setting Time | min | Min 45 | 90–220 |
| Final Setting Time | min | — | 130–320 |
| Soundness | mm | Max 10.0 | 0.0–4.0 |
| Normal Consistency | % | — | 26.0–31.0 |
Compressive Strength (EN 196-1)
| Property | Unit | Standard Limit | Test Results |
|---|---|---|---|
| 2 Days | MPa | Min 20.0 | 24.0–35.5 |
| 28 Days | MPa | Min 52.5 | 54.0–65.0 |