Anhydrite cellular concrete and composite building elements
AssigneeProduits Chimiques Ugine Kuhlmann
InventorRobert Koeppel
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Abstract
New light, strong, non-shrinking cellular concrete having good thermal and acoustic insulating properties prepared by incorporating aluminum and an alkaline agent capable of producing a gas when reacted with the aluminum within an anhydrite binder, placing the mixture in a mold, and permitting it to expand to a cellular product and cure. The products are useful as building materials. The invention includes the production of building elements comprising the cellular anhydrite product as described above adhered to at least one layer of a substantially non-cellular or dense facing layer made with an anhydrite binder or sandwiched between and adhered to non-cellular facing layers both made with an anhydrite binder.
Claims16
A method of producing cellular concrete from a binder, water, and a porogenic system which comprises, forming a composition of an insoluble anhydrite binder together with aluminum powder and an alkaline agent reactive with the aluminum to produce a gas, and an anhydrite setting catalyst, inserting the composition into a mold, and permitting the composition to expand and harden into a cellular concrete, said anhydrite being characterized by a granulometry having at least about 15% by weight of particles of a diameter less than about 10 .mu.m and at least about 20% by weight of particles having a diameter larger 20 .mu.m with an average diameter of between about 5 and about than about 30 .mu.m, the anhydrite likewise being characterized by a Blaine surface area between about 1000 and about 8000 sq. cm/g.
Dependencies are inferred from the claim text.