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Chemical Admixtures Used In Concrete

Chemical Admixtures Used In Concrete

An admixture is a material other than cement, supplementary cementatious material, water, aggregate and fibre reinforcement that is used as an ingredient of concrete, and is added to the batch i...

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Ohorongo: Floor Pouring Process

Ohorongo shows you step by step how to pour a concrete slab using Ohorongo Cement.

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Ohorongo Cement-making Process

Are you familiar with the entire cement making process? This video will explain the entire process in detail.

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Ohorongo Brickmaking Academy

In this video we are going to demonstrate procedures on manufacturing high quality bricks at home! Follow our step by step video. Click on the link below to download the Ohorongo Brickmaking Academy booklet for information on: Crash-course in cement indicators;...

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Plastic Shrinkage Cracking

Plastic Shrinkage Cracking

Plastic shrinkage is the reduction in concrete volume which occurs when water is removed from compacted concrete before it sets. Water can be removed from plastic concrete (concrete which has no...

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Ohorongo Cement Product Types

CEM I 42.5R Used by Brickmakers due to the high early strength. Also used for “special blended mixes’’ where other cementitious additives should be added to obtain prescribed properties. CEM II B-LL 32.5N Used by retailers, small construction co...

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Schematic of cement production process

Schematic of cement production process

This is a schematic presentation of the whole cement manufacturing process. Raw materials such as limestone, shale and marl are collected at the quarry and transported to the crush...

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Honeycombing in concrete

Honeycombing in concrete

Honeycombing is a term used to describe the hollow spaces and cavities; or the rough, pitted appearance on the concrete surface or inside the concrete mass, resulting from the mortar not adequat...

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About Us

Ohorongo (Pty) Ltd. is Namibia’s only cement-producing company and owns one of the most modern cement plants in Africa. It was constructed over the course of two years by leading international engineering com...

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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