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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.

El Mohandes CEM I (42.5N)

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.

Uses and applications

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

Standard specifications: CEM I (42.5 N)

  • Egyptian Standard Specifications (ES. 4756-1 / 2009)
  • European Standard Specifications (EN 197-1 / 2004)
  • American Standard Specifications (ASTM C150 / 2007 – Type I )

Chemical properties:

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%

Physical and Mechanical properties:

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

Compression strength N/mm2:

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.

Shelf time

It is recommended to retest the cement after 6 weeks from the production date.

Safety recommendations

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.

How to clean the cement remains of the used tools

  • Before setting: by using clean water.
  • After setting: by using mechanical methods.

Environment concept

It is advised and recommended to follow local environmental instructions.

El Mohandes Cement

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