Chinese Grey Clay Bricks

Chinese grey clay bricks are one popular Chinese traditional building material. Their material is clay, which is famous for its viscidity. Mix clay and water to make the brick bodies, then put them into kiln. The bricks will be finished under temperature of 900 to 1100 degree centigrade for 8 to 15 days.

Clay contains iron, he iron will formed Fe3O4 when pouring into the water to cooling during sintering. The Fe3O4 shows grey, and then the bricks are grey color. During the chemical reaction in the kiln, the grey bricks have good quality on breaking strength, density, antioxidant, etc.

The clay bricks have the advantages of air permeability, high water absorption. It can keep the air humidity. Meanwhile, the grey color has the beauty of simple, classic, calm and quiet. In nowadays, clay bricks are widely used on walls and paving roads.