EN 197-1 Cement
CEM II/A-LL 42,5 R Portland Limestone Cement
Higher-strength limestone cement for structural use.
Description
A higher-strength Portland-limestone cement balancing structural performance with workability, suitable for ready-mix concrete and precast elements requiring reliable early-age strength.
Application Areas
- Ready-mix concrete for commercial structures
- Precast elements and pavers
- Reinforced concrete with moderate exposure
- Industrial and residential construction
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 | % | — | 15.90–19.90 |
| Al₂O₃ | % | — | 3.70–6.00 |
| Fe₂O₃ | % | — | 2.65–4.90 |
| CaO | % | — | 58.00–66.00 |
| MgO | % | — | 1.00–3.50 |
| SO₃ | % | Max 4.00 | 1.90–3.70 |
| Cl | % | Max 0.10 | 0.0020–0.0400 |
| Loss on Ignition (LOI) | % | — | 3.80–12.00 |
| Free CaO | % | — | 0.35–3.00 |
| Cr (VI) | ppm | — | 1–40 |
| Na₂O | % | — | 0.02–0.32 |
| K₂O | % | — | 0.30–1.00 |
| Na₂O Eq. | % | — | 0.25–0.90 |
| Total Additives | % | Min 6.0 / Max 20.0 | 6.25–19.99 |
| Lime Saturation Factor (LSF) | – | — | 99.00–118.10 |
| Silica Modulus (SM) | – | — | 1.90–2.60 |
| Alumina Modulus (AM) | – | — | 0.85–1.90 |
Physical & Mechanical Requirements
| Property | Unit | Standard Limit | Test Results |
|---|---|---|---|
| Specific Gravity | g/cm³ | — | 2.97–3.13 |
| Specific Surface (Blaine) | cm²/g | — | 3350–5400 |
| Residue on 0.045 mm | % | — | 0.7–8.0 |
| Residue on 0.090 mm | % | — | 0.0–1.0 |
| Initial Setting Time | min | Min 60 | 100–240 |
| Final Setting Time | min | — | 140–310 |
| Soundness | mm | Max 10.0 | 0.0–6.0 |
| Normal Consistency | % | — | 25.5–30.5 |
Compressive Strength (EN 196-1)
| Property | Unit | Standard Limit | Test Results |
|---|---|---|---|
| 2 Days | MPa | Min 20.0 | 21.0–31.0 |
| 28 Days | MPa | Min 42.5 / Max 62.5 | 45.0–55.0 |