A method of producing lightweight multi-layer building elements.

摘要

There is proposed a method for producing a multi-layer building element comprising a relatively thick slab-like part [4] having a first density, and a relatively thin slab-like part [1, 6] having a second density arraged on one or both sides of the relatively thick slab-like part [4] having said first density, the second density being higher than the first density. The slabs comprise a form-stable, but still uncured aerated concrete cut from one or more porous blocks of uncured aerated concrete and are lifted with the aid of suction and lifting means and moved to a support means [2], where they are stacked completely or partially one upon the other in a sequence corresponding to the desired structure of the building element to be formed. The slab layers are bonded together with a mass [3, 10] containing a hydraulic binder arranged in layers between the superposed slabs. Subsequent to forming a sandwich building element in this way, the element is charged to an autoclave and steam-cured therein.