Brick flour (building material)

When clay is a product of crushed bricks . If the grain size is larger , broken bricks are referred to as brick chippings . Production takes place by crushing brick waste or single-type brick rubble from roof and wall bricks in hammer crushers and then sieving them out. The firing temperature of the brick also changes the properties of the flour, the more the brick was fired ( clinker , chamotte ), the more hydraulic its properties.

use

Brick powder as a pigment for a Tamil Kolam

Brick powder is used as an aggregate to provide lime mortar with hydraulic properties and thus increase its strength. Brick powder from high-temperature fired chamotte bricks can be added in the production of sand-lime brick as a supplement with approximately one part chamotte to two parts sand.

Brick powder is added to ceramic masses with a high content of clay in order to make them lean. Brick powder is also used as a covering for tennis courts . It is subject to the DIN 18035/5 standard, the quality assurance is regulated in RAL-GZ 515/1.

Finely ground brick dust can be used as a coloring additive for plastering mortar . Depending on the starting material, pigment is obtained in yellow, red and brown tones. In order not to change the properties of the plaster, soft, low-temperature bricks (from demolished buildings) are used here.

In the aviation industry, brick powder is used to cover runways on some very small airfields. Examples of airfields with brick dust as a track surface are the Portuguese airfields Sines and Praia Verde .