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CEMENT Use Ohorongo CEM II B-LL 32.5N cement or Ohorongo CEM II A-LL 42.5N cement, depending on the purpose and function of the concrete.
AGGREGATES: SAND
When mixing concrete, always consider the final purpose of the concrete and choose the appropriate proportions. Refer to the section overleaf for the recommended mix proportions. Machine mixing is preferable to hand mixing. However, if the concrete is mixed by hand, special care should be taken to follow these instructions:
CEM II B-LL 32.5N | Bags | Sand | Stone | Volume m³ |
HIGH STRENGTH High strength and watertight concrete, driveways and carports |
1 | 1 | 1 | 0.1 m³ |
MEDIUM STRENGTH Concrete floors, patios, footpaths, etc. |
1 | 1½ | 1½ | 0.14m³ |
LOW STRENGTH Concrete foundations and footings |
1 | 2 | 2 | 0.18m³ |
EXTERIOR / DRY MORTAR AND PLASTER mortar and plaster exposed to dampness - mix designs are based on the use of good quality sand |
1 | 2 | - | 0.1m³ |
INTERIOR / DRY MORTAR AND PLASTER Mortar and plaster not exposed to dampness - mix designs are based on the use of good quality sand |
1 | 3 | - | 0.14³ |
The volume of the wheelbarrow is 60 litres.
CEM II A-LL 42.5N | Bags | Sand | Stone | Volume m³ |
HIGH STRENGTH High strength and watertight concrete, driveways and carports |
1 | 1½ | 1½ | 0.1 m³ |
MEDIUM STRENGTH Concrete floors, patios, footpaths, etc. |
1 | 2 | 2 | 0.14m³ |
LOW STRENGTH Concrete foundations and footings |
1 | 2½ | 2½ | 0.21m³ |
EXTERIOR / DRY MORTAR AND PLASTER mortar and plaster exposed to dampness - mix designs are based on the use of good quality sand |
1 | 2 | - | 0.1m³ |
INTERIOR / DRY MORTAR AND PLASTER Mortar and plaster not exposed to dampness - mix designs are based on the use of good quality sand |
1 | 3 | - | 0.14³ |
The volume of the wheelbarrow is 60 litres.
The properties and quality of concrete, mortar- and plaster mixes, in both fresh and hardened states, largely depends on the properties of the materials used.
All aggregates (sand and/or stone) should be clean and dry and not contain clay or organic matter such as leaves, roots or humus. Always store cement and aggregates in a dry place. To avoid moisture rising from the ground, place cement bags on plastic sheeting or a raised wooden platform and cover when necessary to protect against the weather.
Through the provision of high quality cement and appropriate technical know-how, Ohorongo Cement (Pty) Ltd. aims to support entrepreneurs in the construction- and building industry. This document offers some basic guidelines for the use of cement in a range of applications. For further assistance, please do not hesitate to contact the Ohorongo technical
support team.
Click on the link below to download the full Your guide to concreting made easy with Ohorongo Cement document.
Ohorongo (Pty) Ltd. is one of the first of Namibia's cement manufacturers and owns one of the most modern cement plants in Africa. It was constructed over the course of two years by leading international engine...
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