Clay bricks – energy saving? Compared to what?

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There’s no debate, but we’d love to have to one!
If you are interested in an energy efficient building blocks, use ‘recycled crushed aggregate’.

Energy Saving:
Building a typical residential house, using 40,000 Recycled Crushed Aggregate bricks would result in an energy saving of:
– 21,000 Kwh when compared to conventional concrete bricks.
This is equivalent to the energy required to power this house for 23 months.
– 82,000 Kwh when compared with conventional clay bricks
This is equivalent to the energy required to power this house for 91 months.

* Average (ordinary) household electricity consumption in SA (per Eskom published figures) is 900 Kwh per month.


In addition:

  • Less virgin materials such as sand and stone have to be quarried, thereby directly lessening the mining impact on the environment.
  • The quality of the RCA produced is superior (better shaped) to that of normally quarried materials available at a similar price. This means that a lesser percentage of cement can be used to achieve the same compressive strength, resulting in a lower embodied energy.
  •  The transportation of raw materials is significantly reduced. Instead of trucking in our sand and stone from quarries located up to 50km away, 70% of Cape Brick’s raw materials are sourced from demolition sites within 10km of the factory. At the same time the transport of demolition material from the demolition site to a landfill site is also eliminated. The impact of this in terms of fuel saved, emissions, wear and tear on the roads and traffic congestion is enormous.


During the recycling process, primary and secondary crushing removes all steel, wood, paper,plastic and other impurities to ensure a clean stream of perfectly graded sand and stone is ready to be turned into concrete bricks and blocks.

For more information on recycled crushed aggregate blocks click here.


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