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    • 8. 发明专利
    • Process for producing gas concrete bricks
    • DE3444686A1
    • 1986-06-12
    • DE3444686
    • 1984-12-07
    • KLINGSCH WOLFRAM PROF DR ING
    • KLINGSCH WOLFRAM PROF DR ING
    • C04B28/02C04B38/02C04B14/06C04B18/10C04B18/14C04B18/16
    • The novel process for producing gas concrete bricks is indicated, in which an autoclave treatment is not necessary and by means of which solid bricks and hollow-shaped bricks, in particular formwork bricks, can be produced. For this purpose, it is provided in the process for producing gas concrete bricks, finished elements or the like, the fresh concrete being mixed from binders, natural and artificial aggregates and water as starting materials, and a gas-forming propellant such as aluminium powder being mixed in, and the fresh concrete being cast into at least one mould and caused to harden, that conventional cement is used as binder and usual natural and broken sands are used as aggregates, the fresh concrete is filled into individual moulds for each brick and then dried in air. A very highly preferred further development of the process is characterised in that initially the starting materials are mixed in a high-speed mixer to give a chemically activated system, that a concrete plasticiser is added and that, finally, the gas former is mixed in and the resulting expandable mass is cast into the moulds. As a result, substantially higher strengths than hitherto can be achieved in gas concrete. The bricks can either be cast as such in moulds or be formed by sawing after the casting of large blocks.