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weberep 318 FD

weberep 318 FD
weberep 318 FD

Product benefits

  • High early strength
  • Refractoriness
  • Corrosion resistance

Rapid hardening high alumina cement

weberep 318 FD is a normal setting, rapid hardening High Alumina Cement (HAC) with high early strength. It differs substantially from the usual calcium silicate cements (Portland cements) in its manufacturing process, chemical composition and rapid strength gain. weberep 318 FD is composed of calcium aluminates with the following characteristics:

€- High early strength
€- Refractoriness
€- High abrasion resistance
€- Resistance to biogenic sulphuric acid corrosion (BSAC)

weberep 318 FD meets the requirements of British Standard BS 915 for High Alumina Cements and is controlled in accordance with EN 196.
weberep 318 FD is produced by melting selected raw materials (bauxite and limestone) in special kilns. After cooling, the clinker is ground using ball mills.

Product Features

Technical data

Chemical composition (%)
SiO2 2–5
Al2O3 39–42
Fe2O3 14–17
CaO 37–40
MgO < 1.2
SO3 < 0.4

Mineralogical composition
weber.rep 318 FD contains mainly monocalcium aluminate (CA). This mineral phase is responsible for the high early strength. When mixed with water weber.rep 318 FD forms calcium aluminate hydrates as its hydration products. During the hydration of the weber.rep 318 FD no Ca(OH)2 is created, as opposed to Portland cement.

Mineral phases of weber.rep 318 FD

Main mineral phase: CA,
Minor mineral phases: C4AF, C-F-T, C2AS, C6fA4S, C12A7.


Bulk density Around 1.15 g/cm3
Specific gravity 3.2 - 3.3 g/cm3
Fineness (blaine) 3000 - 3500 cm2/g
Refractoriness in cement Approx 1270 C
Residue on sieve at 90 micrometer < 5 %


Setting time and water demand

The testing of the setting time is performed using the mortar in order to describe the behavior of the weber.rep 318 FD in mixtures with a workable consistency. A mixture containing three (3) parts of standard sand and one (1) part cement with a water/cement ratio of 0.43 is produced for testing the mortar on the basis of EN 196.



Initial set1 - 4 hours
Final setMaximum 120 min after the initial set


Development of strenght

After setting, strength develops very rapidly. 

weber.rep 318 FD is cement with very high early strength and high compressive strength. After one (1) day, the compressive strength is higher than that of high grade Portland cements CEM I 52.5 R after 28 days.

6 h1 d3 d
Compressive strenght30-7060-10070-120
Flexural strenght4-87-109-12

 The tests are conducted with mortar prisms 4 x 4 x 16 cm produced according to EN 196 containing three

(3) parts standard sand and one (1) part cement with a water/cement ratio of 0.40.


Resistance to corrosion

High resistance to waste waters in combination with extraordinary abrasion resistance and high resistance to biogenic sulphuric acid corrosion (BSAC) makes weber.rep 318 FD an ideal product for sewer systems and waste water plants. When weber.rep 318 FD is mixed with water, the hydration products of calcium aluminates are formed.

They are extremely resistant to aggressive, slightly acid waters (pH factor > 3) including water soluble sulphates.


weber.rep 318 FD can be stored for 6 months, in its original packaging, in a dry ventilated area.


Send or download the documentation

You can either send the documentation to an email address, or download it.

Environmental and Safety

Safety precautions

The product contains cement powders which, when mixed with water, release alkalis that could be harmful to the skin. It is preferable that the application be done in a ventilated area, and to wear protective gear for hands, eyes and respiratory system and to avoid breathing of the dust. Splashes on the skin should be washed away by cleaning with soap and water. In case of contact with eyes, wash thoroughly with clean water. If swallowed, do not induce vomiting, in both cases seek medical attention. The product is non-flammable.


While the company guarantees its products against defective materials, the use and application of these products are made without guarantee since the conditions of their application are beyond its control. It is recommended to verify with the company that the product is suitable for the intended use, and that this Data Sheet version is the latest one. The company may modify it without prior notice. Technical characteristics are listed for guidance only. For more information, please contact the company’s office in your location.


The information included on this Technical Data Sheet is the sole property of SODAMCO Holding. The unauthorized disclosure, use, dissemination or copying (either whole or partial) of this data sheet or any information it contains, is prohibited and subject to legal pursuit.

Available packaging

Lebanon25 kg
Syria25 kg
Jordan25 kg
KSA25 kg
UAE25 kg
Qatar25 kg
Kuwait25 kg
Oman25 kg