Al Fanar Cement
The scientific concept of Al Fanar Cement is to comply with the standards of Modified Portland Cement Type II (ASTM C150 / 2007 ) by reducing the final total content of Tri-Calcium Aluminates and Tri-Calcium silicate phases as it hydrates generating bigger quantity of heat of hydration.
Also the controlling of Tri-Calcium Aluminates to enable cement to have good resistance against Sulphate (with average concentration 150 – 1500 part per million) and in the same time have a good resistance against chlorides. As the increasing in Tri-Calcium Aluminates reducing concrete ability to resist sulphate and increase the resistance to chlorides.
Al Fanar Cement complies with the following two conditions:
- Tri-Calcium Aluminates content is in between 5 % to 8 %.
- The sum of content of (Tri-Calcium Aluminates and Tri-Calcium silicate) phases (C3S + 4.75 C3A) is not more than 100 ,this is to control the heat of hydration to be not more than 70 Calorie /gm or 290 K.j /kg of cement, this after 7 days of hydration.
Generally, Al Fanar (Type II) Cement is recommended for mixing concrete in the media of double exposure to sulphates and chloride ions such as substructures and superstructures subjected to seawater attack. In addition, it is suitable for concrete elements of large cross sections (mass concrete).
- 1. Moderate heat of hydration that reduces cracks even in mass concrete.
- 2. Balanced moderate Resistance of sulphates and chlorides.
- 3. It gives relatively moderate early compressive strength after7 days.
- 4. It gives high final compressive strength (28 days).
- 5. It gives a relatively delayed setting time and may reduce the needed dosage of concrete admixtures.
American Standard Specifications: (ASTM C.150-2007 / Type II)
| Average Results of Al Fanar | ASTM (C150/2007) | |
|---|---|---|
| Al2O3 | 4.88 - 5.3 | Maximum 6 % |
| Fe2O3 | 4.38 - 4.8 | Maximum 6 % |
| CaO | 62.0 - 63.0 | N.R. |
| MgO | 1.2 – 1.5 | Maximum 6 % |
| SO3 | 2.5 – 2.9 | Maximum 3 % |
| Loss of ignition | 1.0 – 1.5 | Maximum 3 % |
| Insoluble residues | 0.4 – 0.5 | Maximum 0.75 % |
| Alkalies (Na2O+0.65K2O) | 0.50 – 0.54 | Maximum 0.6 % |
| C3A | 5.0 – 5.5 | Maximum 8 % |
| C3S + (4.75*C3A ) | 65.0 – 85.0 | Maximum 100 |
| Average Results | ASTM (C150/2007) | |
|---|---|---|
| Surface area cm2/gm (Blaine Method) | 3000 - 3300 | Not less than 2800 |
| Air content of mortar | 9 - 11 % | 12% |
| Compression Strength N/mm2 | Cubes 5x5x5Cm | |
| After 3 days | 13 - 17 | Not less than 10 N/mm2 |
| After 7 days | 18 - 22 | Not less than 17 N/mm2 |
| Initial Setting Time | 120 170 | Not less than 45 min |
| Final Setting time | 180 230 | Not More than 375 min |
| Hydration KJ/Kg after 7 days | 220 - 230 | Maximum 290 KJ/Kgm |
| Soundness Autoclave expansion | 0.15 - 0.30 | Maximum 0.8% |
- 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 pallets.
- 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 since 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.
للحصول على أفضل النتائج ينصح باتباع الآتي
- يراعى غسل المواد الداخلة في الخلطة الخرسانية ( الركام ) قبل عملية الخلط
- يراعى التأكد من خلو الرمال و الركام من الطفلة و الشوائب العضوية
- يفضل إجراء عملية الخلط الجاف للأسمنت مع الرمال و الركام بشكل جيد للتأكد من تجانس المكونات الجافة قبل إضافة ماء الخلط .
- يراعى التأكد من صلاحية المياه المستخدمة في الخلط , و عموما يمكن استخدام المياه الصالحة للشرب في الخلطات الأسمنتية .
- يفضل استخدام الأسمنت قبل انقضاء نصف مدة صلاحيته و عموما ينصح بإعادة اختبار الأسمنت بعد انقضاء نصف مدة الصلاحية .
يراعى ما يلي في عملية التخزين
- يتم التخزين في مكان جاف بمعزل عن الرطوبة الأرضية
- يفضل و ضعه على قاعدة خشبية .
- يجب مراعاة تغطية الأسمنت في الأجواء الرطبة و الممطرة .
- يجب ألا يزيد عدد الصفوف عند التخزين عن عشرة صفوف .