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There are various types of bricks used in South Africa. But we will only focus on the commonly used bricks

  1. Sand Lime Bricks (Calcium Silicate Bricks)
  2. Engineering Bricks
  3. Concrete Bricks
  4. Fly ash Clay Bricks

Below you will find summarized benefits and applications of the most commonly used type of bricks.

Sand Lime Bricks

Sand lime bricks are made by mixing sand, fly ash and lime followed by a chemical process during wet mixing. The mix is then molded under pressure forming the brick. These bricks can offer advantages over clay bricks such as:

  • Their color appearance is gray instead of the regular reddish color.
  • Their shape is uniform and presents a smoother finish that doesn’t require plastering.
  • These bricks offer excellent strength as a load-bearing member.

What Are Engineering Bricks?

Engineering bricks are bricks manufactured at extremely high temperatures, forming a dense and strong brick, allowing the brick to limit strength and water absorption.

Engineering bricks offer excellent load bearing capacity damp-proof characteristics and chemical resisting properties. These bricks are used in specific projects and they can cost more than regular or traditional bricks.

Concrete Bricks

Concrete bricks are made from solid concrete and are very common among homebuilders. Concrete bricks are usually placed in facades, fences, and provide an excellent aesthetic presence. These bricks can be manufactured to provide different colors as pigmented during its production.

Fly Ash Clay Bricks

Fly ash clay bricks are manufactured with clay and fly ash, at about 1,000 degrees C. Some studies have shown that these bricks tend to fail poor produce pop-outs, when bricks come into contact with moisture and water, causing the bricks to expand.

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