Ytong partition wall element NL - reinforced partition wall element made of aerated concrete

The mentioned products are reinforced elements of different sizes made of aerated concrete. Aerated concrete belongs to the group of porous, autoclaved lightweight concretes.

The ground quartz sand is mixed with quicklime, cement, small quantities of a sulphate carrier in the form of gypsum or anhydrite and autoclaved aerated concrete powder (crushed or ground AAC) as production residue, with the addition of water and aluminium powder or paste, in a mixer to form an aqueous suspension and poured into casting moulds. The water slakes the lime under heat generation. The steel reinforcement is manufactured in the aerated concrete factory. The reinforcement elements are treated against corrosion by immersion bathing before they are installed in the casting moulds. The aluminium reacts in an alkaline environment. In the process, gaseous hydrogen is formed, which creates the pores in the mass and escapes without leaving any residue. The pores usually have a diameter of 0.5-1.5 mm and are filled exclusively with air. After the initial setting, semi-solid raw blocks are produced from which the aerated concrete components are cut by machine and with high precision. The formation of the final AAC properties takes place during the subsequent steam curing over 6-12 hours at about 190 °C and a pressure of about 12 bar in steam pressure vessels, the so-called autoclaves. Here, calcium silicate hydrates are formed from the materials used, which correspond to the naturally occurring mineral tobermorite. The reaction of the material is completed when it is removed from the autoclave. The steam is used for further autoclave cycles after the hardening process has been completed. The condensate produced is used as process water. In this way, energy is saved and pollution of the environment with hot exhaust steam and waste water is avoided.

Transport-reinforced components for non-load-bearing walls. In accordance with the specification, direct contact with water is avoided during construction.