Cement Products

Al Moukawem Cement 42.5N

SRC is defined as the hydraulic bonding grey fine powder which is the result from crushing a dry mix made of SRC clinker and gypsum.
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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.

Uses and applications

It can be used in all concrete constructions such as reinforced concrete foundations, sewage drainage tanks, bridge foundations and piles which are exposed to be directly affected by sulfates. It can also be used in sewage concrete pipes and lining steel pipes.

Standard specifications: CEM IV/A (P) 42.5 N

  • Egyptian Standard Specifications (ES. 4756-1 / 2013) 
  • European Standard Specifications (EN 1-197 /2011)

Chemical properties

Item -- Spec. Limit Test Result
SiO2 % ---- 25.30
Al2O3 % ---- 6.64
Fe2O3 % ---- 6.68
CaO % ---- 58.44
MgO % ---- 2.29
SO3 % 3.5 max. 2.04
Na2O % ---- 0.66
K2O % ---- 0.25
Cl % 0.1 max. 0.06
Cr (Hexavalent) ppm 2.0 max. 1.3
C3A in clinker % 9 max. 3.50

Physical and Mechanical properties

Fineness, Blaine Cm2/gm ---- 4066
Water of Consistency % ---- 27.75
Setting time (Vicat): Initial minutes 60.0 min 145
Final minutes ---- 195
Le chatelier expansion mm 10.0 max 1.0
Compressive Strength Mpa(N/mm2)    
2 days   10 min 21.88
7 days     36.78
28 days   42.5 min., 62.5 max 50.35

Comparison between Al Moukawem CEM IV/A (P) 42.5 N average compressive strength and ES. 4756-1 / 2013.

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 ten bags.

Shelf time

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

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.

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.

إرشادات الاستخدام الأمثل

للحصول على أفضل النتائج ينصح باتباع الآتي :

  • يراعى غسل المواد الداخلة في الخلطة الخرسانية ( الركام ) قبل عملية الخلط .
  • يراعى التأكد من خلو والرمال و والركام من الطفلة و والشوائب العضوية .
  • يفضل إجراء عملية الخلط الجاف للأسمنت مع الرمال و والركام بشكل جيد للتأكد من تجانس المكونات الجافة قبل إضافة ماء الخلط .
  • يراعى التأكد من صلاحية المياه المستخدمة في الخلط، , و وعموماً يمكن إاستخدام المياه الصالحة للشرب في الخلطات الأسمنتية .
  • يفضل إاستخدام الأسمنت قبل إانقضاء نصف مدة صلاحيته و وعموماً ينصح بإعادة إاختبار الأسمنت بعد إانقضاء نصف مدة الصلاحية .

التخزين

يراعى ما يلي في عملية التخزين :

  • يتم التخزين في مكان جاف بمعزل عن الرطوبة الأرضية .
  • يفضل و وضعه على قاعدة خشبية .
  • يجب مراعاة تغطية الأسمنت في الأجواء الرطبة و والممطرة .
  • يجب ألا يزيد عدد الصفوف عند التخزين عن عشرة صفوف .