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CEM II B-V 42.5N


Ohorongo CEM II B-V 42.5N Portland Fly Ash Cement is a dry powder blend of Ohorongo hydraulic portland cement and pozzolanic siliceous Fly Ash according to SANS 50197/NAMS 197.

Stringent production control during the entire production process ensures consistent high quality.


The Ohorongo Portland Cement clinker component is compliant to the SANS 50197 specification, whereas the fly ash mineral extender component complies to SANS 50450-1, category S.

The blend, Ohorongo Cement CEM II B-V 42.5N, complies to the SANS 50197 specification in terms of chemistry (B-V) and performance (class 42.5N).

The “V” indicates siliceous fly ash of high quality and “B” represents 21%-35% of mass.


Ohorongo CEM II B-V 42.5N Portland Fly Ash Cement blend is suitable for general concrete and precast concrete production.

This product offers particular suitability as binder for applications including:

  • Durability concrete in aggressive chemical environments
  • Durability concrete in marine environments
  • Water-tight concrete for water-retaining structures
  • Large volume concrete pours that require reduced heat of hydration development profiles
  • “Green” concrete
  • Concrete manufactured with aggregates exhibiting potential alkali- aggregate reactivity

Ohorongo Cement CEM II B-V 42.5N is compatible with commercial chemical admixtures.


Ohorongo Cement is distributed in 50 kg bags, 2 ton bags and bulk tankers. Bulk storage silos should be dry and vapor tight. Cement bags should be protected from moisture and kept dry, preferably off ground by means of pallets or timber, preventing moisture contact. Bags should be stored away from direct sunlight, or should be covered by a roof or sheeting. Stacking should be kept to a maximum of two pallets high to avoid compaction of cement bags at the bottom.

Handling and Safety

Refer to Ohorongo Cement Safety Data Sheet, obtainable from Ohorongo Cement.

Technical Support

Ohorongo Cement offers technical support from its comprehensively equipped chemical-, cement-, and concrete laboratories. Assistance to cement- as well as concrete aspects, including advice on mix design is available from our qualified technical staff.


Please contact the Ohorongo Cement Sales Office for price enquiries.

If you are a redistibutor of Ohorongo Cement and need high resolution images for your promotional material, files in various formats may be found in the Ohorongo Cement Media Library.

Resources & Tools

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Our Contacts

Ohorongo Haus
Schanzenweg 35, Klein Windhoek
P.O. Box 86842, Eros
Tel: +264 61 389 300

Cement Plant
Sargberg Plant, North Otavi
P.O.Box 444, Tsumeb
Tel: +264 67 235 7000

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