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PO Box : 1492, Ras Al Khaimah, United Arab Emirates
Tel : (9717) 2668888 Fax : (9717) 2668866 Telex 99267 WHITE EM
White cement is a specialised product requiring a high
degree of quality control at all stages of production. lts use is found in the
manufacture of terrazo tiles, precast facade finishes and for other decorative
purposes. White cement is not a conventional cement and is normally used for
its appearance and low maintenance requirement. It has, however, all the strength
and properties of'ordinary Portland cement and is frequently used for construction
purposes.
Typical Properties of Ras Al Khaimah White Cement
| Chemical Analysis (%) | Mineral Analysis (%) | |||||||||
| SiO2 | Al2O3 | Fe2O3 | CaO | MgO | SO3 | Alkali | C3S | C2S | C3A | C4AF |
| 22.6 | 4.8 | 0.2 | 65.8 | 1.0 | 2.8 | 0.3 | 55.5 | 22.9 | 12.4 | 0.6 |
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Physical Properties |
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Surface Area |
Soundness Le Chatelier |
Setting Time Vicat (mm) |
Strength (ASTM) mortar (p.s.i.) |
Strength (B.S.) mortar N/mm2 |
|
400 |
1 |
130190 |
4000 6500 |
4262 |
The adjacent Ras Al Khaimah, Lime Co. "NOORA"
has produced a high quality burnt lime since 1979. Calcination is carried out
in a modern "Maerz" kiln under carefully controlled conditions producing
400 tonnes of "NOORA" Quick-lime daily,Quick-lime is supplied
in bulk, in 50kg bags or in 1.5 jumbo bags. "NOORA" hydrated lime
is a dry white powder produced by hydrating the chemically pure Quick-lime and
is normally packed in 7kg and 25kg kraft paper bags, in jumbo bags or bulk.
The lime products are used for example in construction, the sugar industry,
for water treatment, in asphalt paving, the production of paperchemicals and
calcium silicate bricks in addition to a host of other Applications.
|
Typical Chemical Analysis |
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| Calcium Hydroxide (Reactive) |
Ca(OH)2 | 95.50 % |
| Silica | (SiO2) | 0.31 % |
| Ferric Oxide | Fe2O3 | 0.15 % |
| Aluminium Oxide | Al2O3 | 0.21 % |
| Magnesium Oxide | MgO | 0.89 % |
| Sulphur Trioxide | SO3 | 0.45 % |
| Acid Insoluble | 0.10 % | |
| Carbon Dioxide | CO2 | 0.90 % |
| Loss on ignition | 24.60 % | |
| Typical Grading | |
| Nominal Seive Size (Micron) |
Percentage Passing |
| 600 | 100.0 |
| 180 | 99.8 |
| 90 | 99.5 |
| 75 | 99.0 |
| Bulk Density | 400 Kg / M3 |
The Ras Al Khaimah Lime Brick Factory, which is also
located nearby, use "NOORA" Lime in combination with silica sand in
the production of Calcium Silicate Bricks. The raw materials are homogeneously
mixed with water and then formed into shape by automatic presses. The bricks
are then placed in an autoclave at a pressure of 15 atmosphere for 10 hours.
Calcium Silicate Bricks have several advantages such as aesthetic appeal in
various sizes and colors, easy maintenance, good thermal and sound insulation
and high compressive strength conforming to BS 187. Applications include load
bearing construction, boundary walls, cladding and paving. lt is suitable for
use in multi-storey buildings, villas, schools, hospitals, hotels, and warehouses.