Developed in 1924 by a Swedish engineer, it is necessary to wait until the 50s for the manufacture of cellular concrete in France. If he was born in a country with strong climatic variations, it is because one of his main characteristics is his insulating power.
What is cellular concrete?
Cellular concrete is a mixture of lime, sand, water cement and a blowing agent such as aluminum powder.
It is its steaming autoclave that gives all its characteristics to this liquid base that solidifies after a few hours spent in an oven.
The phenomenon of expansion of the material that the composition of the cellular concrete and its method of cooking allow, fills the cellular concrete with air bubbles. What gives it lightness and insulating powers. With a high thermal coefficient, ie a lambda of 0.10 W / m.K, it protects from cold as hot.
In addition, its high thermal inertia also allows it to regulate naturally, the variations of the temperature inside a house. It is healthy not containing volatile organic compounds (VOCs). Its dense and airy configuration also makes it non-flammable and perfect for smothering noises. Finally, its manufacture is non-polluting.
For what uses, is the cellular concrete reserved?
Lightweight, weighing about 3 times less than ordinary concrete, it is easy to cut with the saw and ask. Its uses are therefore multiple. In panels 5 cm thick, it is an excellent acoustic and thermal insulation of the floor, ceilings and walls wet or receptive to noise. Obviously you do not have to be afraid of losing a few inches.
Form bricks with a thickness of 20 to 50 cm, it is used to mount partitions, shower or WC spaces. Under the eaves, in cellars or garage spaces it allows all amenities and provides excellent protection. Note, some single houses are entirely constructed of cellular concrete no longer requiring other insulation.
To mount a partition, simply overlay the cellular concrete bricks and seal them with a special adhesive mortar for a perfect seal. The walls thus obtained lend themselves to all the finishes, painting, tiling, paneling of wood... All these qualities also allow to decline it as a decorative material. It is often used as a worktop or floor.