Perforated brick

In construction, a perforated brick is a parallelepipedal piece of fired ceramic with perforations on the face with the largest surface area, called a table, if the total volume of holes is between 25% and 45% of the total volume of the piece. When the volume is less than 25%, it is considered solid brick.

Features

Its shape is the result of extruding the clay through a nozzle. The perforations allow the brick a good adhesion of the mortar with the ceramic piece, ensuring good mechanical resistance and sealing. Its use is very widespread when making a face-facing factory. Their rigs usually have sores or joints 1 to 1.5 cm thick.

Other countries

In other countries, definitions may vary. In the USA, according to the ASTM (American Society for Testing and Materials), the so-called hollow bricks (hollow bricks) have perforations of 25% to 60% of their section in a plane parallel to the surface and that cuts the shells. With minor perforations, they are considered solid bricks, although the term cored bricks is also found if they have some perforations or shells (The word core originally means core or core, for example the central axis of an apple, which contains the seeds and is not usually eaten, but has come to be used as a verb, meaning to remove the core of something, leaving a cylindrical hole, and from there the noun has acquired the meaning of perforation).

Cutouts do not have to go all the way through the brick. If they do, they are called cores if the section of the perforations is smaller than 9.7 cm², and cells if it is larger. If the cutout does not go through the brick, being simply an indentation in the surface, it is called a frog.

In Australia, apparently the criteria for considering a hollow brick is to have at least 30% perforations

This distinction between bricks with little pouring and those with a lot of pouring seems to be largely due to the possibility of inserting reinforcements or braces to build reinforced walls in areas of high winds or seismic activity, although the possibility of making bricks more important also plays a role. large with reasonable weights, which reduce construction costs.