DE925275C - Building element made of plaster - Google Patents
Building element made of plasterInfo
- Publication number
- DE925275C DE925275C DEM19464A DEM0019464A DE925275C DE 925275 C DE925275 C DE 925275C DE M19464 A DEM19464 A DE M19464A DE M0019464 A DEM0019464 A DE M0019464A DE 925275 C DE925275 C DE 925275C
- Authority
- DE
- Germany
- Prior art keywords
- plaster
- building element
- element made
- paris
- salts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/087—Acids or salts thereof containing chromium in the anion, e.g. chromates
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Building Environments (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
Bauelement aus,Gips In zunehmendem Maße werden heute Bauelemente aus Gips, z. B. Gipsplatten, als Konstruktionsteile, insbesondere als feuerdämmende Abriegelung, verwendet. Sie haben aber den Nachteil, daß sie in Berührung mit Eisen oder Stahl deren Oberfläche durch Korrosion angreifen. Durch diese Eigenschaft wird die allgemeine Verwendung von Bauelementen aus Gips, deren feuerdämmende Wirkung von keinem anderen Baustoff gleicher Wirtschaftlichkeit annähernd erreicht wird und z. B. im Luftschutzwesen, für Geldschränke u. dgl. sehr vorteilhaft ist, stark eingeschränkt.Building element made from plaster Today, building elements are increasingly being made from plaster of paris Plaster of paris B. plasterboard, as structural parts, especially as fire-insulating Lockdown, used. But they have the disadvantage that they come into contact with iron or attack the surface of steel through corrosion. This property makes the general use of building elements made of plaster, their fire-insulating effect is nearly reached by any other building material with the same economic viability and Z. B. in air raid protection, for safes and the like. Is very advantageous, strong restricted.
Es wurde gefunden, daß dieser Nachteil vermieden wird, wenn der Gips Chromsäure oder deren Salze enthält. Es ist zwar bekannt, daß Chromat-Ionen wäßrigen Lösungen gegenüber Eisen und Stahl passivierende Eigenschaften verleihen. Es war aber nicht vorauszusehen, daß diese Wirkung auch für das im Gips chemisch gebundene Wasser erhalten bleibt und daß die Beweglichkeit der Chromationen in dem als feste Masse erstarrten Gips noch so groß ist, daß sie bei bloßer Berührung von erstarrtem Gips mit Eisen oder Stahl noch deren Oberfläche zu passivieren vermögen. Die Chromsäure oder deren Salze können einfach dem Gipsbrei oder dem zu dessen Bereitung dienenden Wasser zugesetzt sein. Ganz überraschend ist die außerordentlich hohe Wirksamkeit. Es wurde gefunden, daß Mengen von o,o5 bis a °/o, bezogen auf die Menge des benötigten Anmachewassers, schon genügen, um jede Art von Rostbildung an einer mit der Gipsplatte in Berührung befindlichen Eisen-oder Stahloberfläche zu verhüten. Wenn beispielsweise Natriumbichromat verwendet wird, genügt eine Menge von o, t %.It has been found that this disadvantage is avoided when the plaster of paris Contains chromic acid or its salts. It is known that chromate ions are aqueous Give solutions to iron and steel passivating properties. It was but it cannot be foreseen that this effect will also apply to that which is chemically bound in gypsum Water is preserved and that the mobility of the chromate ions in the as fixed Mass of solidified plaster of paris is still so large that it is simply touched by solidified Plaster of paris with iron or steel is still able to passivate their surface. The chromic acid or their salts can simply be added to the gypsum paste or to the paste used for its preparation Be added to water. The extraordinarily high effectiveness is quite surprising. It has been found that amounts of o, o5 to a ° / o, based on the amount of required Mixing water is enough to prevent any kind of rust formation on the plasterboard to prevent iron or steel surfaces in contact. For example, if Sodium dichromate is used, an amount of o, t% is sufficient.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM19464A DE925275C (en) | 1953-07-25 | 1953-07-25 | Building element made of plaster |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM19464A DE925275C (en) | 1953-07-25 | 1953-07-25 | Building element made of plaster |
Publications (1)
Publication Number | Publication Date |
---|---|
DE925275C true DE925275C (en) | 1955-03-17 |
Family
ID=7297977
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEM19464A Expired DE925275C (en) | 1953-07-25 | 1953-07-25 | Building element made of plaster |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE925275C (en) |
-
1953
- 1953-07-25 DE DEM19464A patent/DE925275C/en not_active Expired
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