El Mohandes CEM I (42.5N)
El Mohandas cement is a very special formula of Ordinary Portland cement that gives relatively delayed initial setting time, early compressive strength for concretes, and moderate heat of hydration for concrete and mortar.
Generally, El Mohandas is properly for mixing concrete in hot weather and suitable to be used in ready mix concrete plants, factory precast concrete elements, and prefabricated concrete units.
It can be used in all types of constructions, which need high early compressive strength, such as bridges, tunnels, prefabricated floor, and precast concrete.
- 1. It gives relatively high early compressive strength after7 days.
- 2. It gives high final compressive strength (28 days).
- 3. It gives a relatively delayed setting time and reduces the ratio of concrete normal and super plasticizers admixtures (this admixture is used to delay initial setting time of concrete and give more workability).
- 4. It reduce concretes cracks
- Egyptian Standard Specifications (ES. 4756-1 / 2009)
- European Standard Specifications (EN 197-1 / 2004)
- American Standard Specifications (ASTM C150 / 2007 – Type I )
| Average results of El Mohandes | Egyptian Specifications (ES. 4756-1/2009) | |
|---|---|---|
| SO3 | 2.5 % - 3.0% | Not more than 3.5% |
| Loss of ignition | 1.0 -1.5% | Not more than 5% |
| Insoluble residues | 0.3 % - 0.5% | Not more than 5% |
| Chlorides contents | 0.02 – 0.04 | Not more than 0.10% |
| Average Results of El Mohandas | Egyptian Specifications (ES. 4756-1/2009) | |
|---|---|---|
| Surface area cm2/gm (Blaine Method) | 3200 - 3300 | ( NR ) |
| Setting time | ||
| Initial setting time | 140 - 180 | Not less than 60 min. |
| Final setting time | 200 - 250 | ( NR ) |
| Hydration KJ/Kg after 7 days | 250 - 260 | ( NR ) |
| Soundness (Le Chatelier) | 0.0 - 1.0 | Not more than 10 mm |
| Average results of El Mohandas | Egyptian Specifications (ES. 4756-1/2009) | |
|---|---|---|
| After 2 days | 18 - 23 | Not less than 10 N/mm2 |
| After 7 days | 30 - 35 | |
| After 28 days | 44 - 48 | Not less than 42.5 N/mm2M & Not more than 62.5 N/mm2 |
- Bags: 50 Kg/bag
- Jumbo plastic bags: 500 Kg/bag, 1000 Kg/bag, 1500 Kg/bag
- It is also available in bulk.
It is recommended to follow the coming instructions:
- Storage should be done in a dry place and away from ground moisture.
- It is preferable to store it on wooden bases.
- Cement should be covered to avoid the rain.
- It is recommended not to pile up any more than ten bags, some on others.
It is recommended to retest the cement after 6 weeks from the production date.
It is recommended to follow the coming instructions:
- Avoid the contact of the cement with the eyes and the skin since it may cause allergic reaction.
- Use gloves and glasses to protect hands and eyes in case of spray applications, or manual mixings.
- Before setting: by using clean water.
- After setting: by using mechanical methods.
It is advised and recommended to follow local environmental instructions.