EN 197-1 Cement
CEM I 42,5 R Portland Cement
High early and final strength Portland cement.
Description
Pure Portland cement delivering high early and final strengths, suitable for precast, structural concrete and infrastructure works where rapid form-stripping and reliable load capacity are required.
Application Areas
- Precast and prestressed concrete elements
- High-strength structural concrete
- Cold-weather concreting with controlled set times
- Infrastructure, bridges and industrial flooring
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 | % | — | 18.00–21.00 |
| Al₂O₃ | % | — | 4.20–6.20 |
| Fe₂O₃ | % | — | 2.60–5.00 |
| CaO | % | — | 60.00–66.70 |
| MgO | % | — | 1.00–3.70 |
| SO₃ | % | Max 4.00 | 2.00–3.70 |
| Cl | % | Max 0.10 | 0.0010–0.0400 |
| Loss on Ignition (LOI) | % | Max 5.00 | 0.80–4.70 |
| Insoluble Residue | % | Max 5.00 | 0.05–1.75 |
| Free CaO | % | — | 0.25–2.70 |
| Cr (VI) | ppm | — | 1–40 |
| Na₂O | % | — | 0.02–0.35 |
| K₂O | % | — | 0.30–1.10 |
| Na₂O Eq. | % | — | 0.25–0.90 |
| Total Additives | % | Max 5.00 | 0.00–4.99 |
| Lime Saturation Factor (LSF) | – | — | 96.50–108.40 |
| Silica Modulus (SM) | – | — | 1.80–2.60 |
| Alumina Modulus (AM) | – | — | 0.90–2.00 |
Physical & Mechanical Requirements
| Property | Unit | Standard Limit | Test Results |
|---|---|---|---|
| Specific Gravity | g/cm³ | — | 3.07–3.18 |
| Specific Surface (Blaine) | cm²/g | — | 3100–4400 |
| Residue on 0.045 mm | % | — | 0.2–7.0 |
| Residue on 0.090 mm | % | — | 0.0–1.0 |
| Initial Setting Time | min | Min 60 | 90–245 |
| Final Setting Time | min | — | 130–330 |
| Soundness | mm | Max 10.0 | 0.0–4.0 |
| Normal Consistency | % | — | 25.0–29.0 |
Compressive Strength (EN 196-1)
| Property | Unit | Standard Limit | Test Results |
|---|---|---|---|
| 2 Days | MPa | Min 20.0 | 21.0–35.0 |
| 28 Days | MPa | Min 42.5 / Max 62.5 | 48.0–62.5 |