Light concrete – Porous artificial aggregates are used to make lightweight concretes (expanded clay, glinoporyt, metallurgical pumice stone, granulated slag). The type of aggregate is largely determined by the location of the plant. Expanded clay is most often used. Blast and Portland cement are used as a binder.

Classification of concrete due to its structure:

• Cavity concrete, in which the voids between the aggregate grains are not completely filled with mortar.

• Compact concrete, in which at least 85% the space between the aggregate grains is filled with the mortar.

• Semi-hard concrete, in which the voids are only partially filled with mortar.

Lightweight concrete has a low bulk density and low strength, but good thermal insulation properties. It is made of curtain walls and load-bearing walls of small buildings.