US4233080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anhydrite cellular concrete and composite building elements
Assignee: Produits Chimiques Ugine Kuhlmann
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Filing: 1978-12-13
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Granted: 1980-11-11
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Expires: 1998-12-13
Abstract
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.
Inventors
- 👤 Robert Koeppel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:35
CPC Classifications
C; C04; C04B; C04B11/00; C04B11/05; C04B28/00; C04B28/14; C04B28/16; E; E04; E04C; E04C2/00; E04C2/02; E04C2/26; E04C2/284
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
134 words
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 μm and at least about 20% by weight of particles having a diameter larger 20 μm with an average diameter of between about 5 and about than about 30 μm, the anhydrite likewise being characterized by a Blaine surface area between about 1000 and about 8000 sq. cm/g.
Claim 2
Independent Claim
134 words
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 μm and at least about 20% by weight of particles having a diameter larger 20 μm with an average diameter of between about 5 and about than about 30 μm, the anhydrite likewise being characterized by a Blaine surface area between about 1000 and about 8000 sq. cm/g.
Claim 3
Dependent Claim
116 words
A method of producing a cellular concrete according to claim 1 in which the composition comprises 100 parts by weight of anhydrite or a mixture of anhydrite and aggregates, 25 to 55 parts by weight of water, 0.50 to 2 parts by weight of one or more anhydrite setting catalysts, 0.1 to 5 parts by weight of an alkaline agent comprising one or more oxides or hydroxides of an alkaline earth metal or one or more hydroxides of an alkaline metal or a mixture of one or more oxides or hydroxides of an alkaline earth metal with one or more hydroxides of an alkaline metal and 0.01 to 0.20 parts by weight of an aluminum powder.
Claim 4
Dependent Claim
22 words
A method according to claim 2 in which the anhydrite setting catalyst is potassium sulphate and the alkaline agent is calcium hydroxide.
Claim 5
Dependent Claim
19 words
A method according to claim 3 in which the alkaline agent is mixed with potassium hydroxide or sodium hydroxide.
Claim 6
Dependent Claim
14 words
A method according to claim 2 in which the composition contains a fluidizing agent.
Claim 7
Dependent Claim
31 words
A method according to claim 2 in which the composition contains a surfactant in the proportion of about 0.001 to 0.1 parts by weight per 100 parts by weight of composition.
Claim 8
Dependent Claim
31 words
A method according to claim 2 in which the composition contains a stabilizer in the proportion of about 0.001 to 0.5 parts by weight per 100 parts by weight of composition.
Claim 9
Dependent Claim
13 words
A method according to claim 7 in which the stabilizer is polyvinyl acetate.
Claim 10
Dependent Claim
28 words
A method according to claim 2 in which the composition contains fiber in the proportion of about 0.1 to 5 parts by weight per 100 parts of composition.
Claim 11
Dependent Claim
31 words
A method according to claim 2 in which the composition contains a water repellant in the proportion of 0.1 to 1.0 parts by weight per 100 parts by weight of anhydrite.
Claim 12
Dependent Claim
17 words
A method according to claim 10 in which the water repellant is a potassium or sodium siliconate.
Claim 13
Dependent Claim
15 words
A method according to claim 10 in which the water repellant is an acrylic copolymer.
Claim 14
Dependent Claim
16 words
A method according to claim 12 in which the acrylic copolymer is a methylacrylate-butylmethacrylate-butyl acrylate copolymer.
Claim 15
Dependent Claim
12 words
A cellular product produced in accordance with the method of claim 1.
Claim 16
Dependent Claim
12 words
A cellular product produced in accordance with the method of claim 2.
Claim 17
Dependent Claim
22 words
The method of producing a cellular concrete according to claim 1 wherein the Blaine area is between 2000 and 5000 sq. cm./g.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |