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Al Moukawem Cement 42.5N
Al Moukawem CEM IV/A (P) 42.5 N – SR
Our interest in Assiut Cement Company - Cemex is to reduce pollution and carbon emissions resulting from the manufacturing and use of cement. The company took the lead in developing its Assiut cement product to CEM IV/A (P) 42.5 N - SR, aiming to use materials with pozzolanic properties with clinker, in line with Egyptian and international specifications.
Pozzolana improves the properties of cement and concrete by reducing the reaction temperature and cracks, as it reduces the porosity of the concrete. Adding and mixing water to it, harden this grey fine powder, and this is what makes it resistant to water and able to bare compressive strength, as well as resistant to sulphates that exist in soil, such as clay soil.
In this type of cement, it is necessary to decrease the ratio C3A less than 3.5%, because this component reacts with Ca SO4, which exists in soil or water. The result of this reaction is called Ettringite, which causes increasing in the concrete volume then causes cracks that lead to concrete failures.
Usages and Applications
| Item | Unit | Spec. Limit | Test Result |
|---|---|---|---|
| SiO₂ | % | ---- | 25.54 |
| Al₂O₃ | % | ---- | 6.58 |
| Fe₂O₃ | % | ---- | 6.40 |
| CaO | % | ---- | 53.08 |
| MgO | % | ---- | 2.32 |
| SO₃ | % | 3.5 max. | 2.55 |
| Na₂O | % | ---- | 0.98 |
| K₂O | % | ---- | 0.46 |
| Cl | % | 0.10 max. | 0.05 |
| Cr (Hexavalent) | % | 2.0 max. | 1.30 |
| Item | Unit | Spec. Limit | Test Result |
|---|---|---|---|
| Fineness, Blaine | Cm²/gm | ---- | 3892 |
| Heat of Hydration (7 d) | KJ/kg | 270 max. | 230 |
| Initial setting time | minutes | 60.0 min | 140 |
| Final setting time | minutes | ---- | 195 |
| Le chatelier expansion | mm | 10.0 max | 1.0 |
| Compressive Strength | Mpa(N/mm²) | ||
| 2 days | 10 min | 19.19 | |
| 7 days | 33.05 | ||
| 28 days | 42.5 min., 62.5 max. | 48.38 |
Standard specifications: CEM IV/A (P) 42.5 N
Egyptian Standard Specifications (ES. 4756-1 / 2013)
European Standard Specifications (EN 197-1 / 2011)
Relevant Information
Packaging
- Bags: 50 Kg/bag.
- Jumbo plastic bags: 500 Kg/bag, 1000 Kg/bag, 1500 Kg/bag.
- It is also available in bulk.
Storage
It is recommended to follow the following instructions:
- Storage should be done in a dry place and away from ground moisture.
- It is preferable to store on wooden bases.
- Cement should be covered to avoid the rain.
- It is recommended not to pile up any more than eight bags.
Shelf time
Safety recommendations
It is recommended to follow the following instructions:
- Avoid contact of cement with eyes and skin since it may cause allergic reactions.
- Use gloves and glasses to protect hands and eyes in case of spray applications, or manual mixings.
Health effects
- Inhalation: May cause respiratory irritation. Repeated exposure to cement can cause damage to the lungs.
- Skin contact: Causes severe burns and may cause an allergic skin reaction.
- Eye contact: Causes serious eye damage.
First-aid measures
- Eye Contact: Flush the eyes with plenty of water and seek medical doctor advice.
- Skin Contact: Wash the skin with natural soap and water, use moisturizing cream, then consult medical doctor.
- Ingestion: Do not vomit or drink large amount of water and seek medical doctor advice.
- Inhalation: Move person to fresh air area, if the person is not breathing, make CPR (artificial respiration), and if there is difficulty in breathing, provide person with oxygen and seek medical doctor.
