Why Are Bricks Usually Red?

What Makes Bricks Red In Color?

Everyone knows that bricks are widely used for building construction and are generally stronger than concrete and many other building materials

And have been used for centuries as they provide structural strength to buildings. But whenever we take the name of brick, only one color comes to our mind and that is red

Initially, Bricks are made from soft clay and then put in a rectangular frame to make raw bricks. But raw bricks are not strong yet and can easily break at any time

Therefore, to make raw bricks stronger, they are burned in high-firing temperature furnaces or brick kilns. The temperature of the kiln is kept at around 875 to 900°C

As a result, the clay particles clump together to form a super-strong bond that transforms the clay bricks into a stronger metamorphic form

The color of bricks is affected by the chemical and mineral content of the raw materials used, the firing temperature, and the kiln environment

During the process, minerals in clay give the brick its color as they absorb oxygen, and iron oxide is one of the most important minerals in clay that gives it red color

Therefore, at higher temperatures, the chemical composition of the raw brick changes due to which iron oxide is formed, which causes the bricks to turn red in color

The main constituent and composition of bricks are Silica (sand) - 50% to 60%, Alumina (clay) - 20% to 30%, Lime - 2 to 5%, Iron oxide -  7%, and Magnesia - 5%

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