AT164924B - Process for the production of artificial stones - Google Patents
Process for the production of artificial stonesInfo
- Publication number
- AT164924B AT164924B AT164924DA AT164924B AT 164924 B AT164924 B AT 164924B AT 164924D A AT164924D A AT 164924DA AT 164924 B AT164924 B AT 164924B
- Authority
- AT
- Austria
- Prior art keywords
- added
- lime
- mixture
- hydrated lime
- production
- Prior art date
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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
- C04B28/12—Hydraulic lime
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00336—Materials with a smooth surface, e.g. obtained by using glass-surfaced moulds
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00862—Uses not provided for elsewhere in C04B2111/00 for nuclear applications, e.g. ray-absorbing concrete
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/54—Substitutes for natural stone, artistic materials or the like
- C04B2111/542—Artificial natural stone
- C04B2111/545—Artificial marble
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/90—Electrical properties
- C04B2111/92—Electrically insulating materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Description
<Desc/Clms Page number 1>
Verfahren zur Herstellung von Kunststeinen
EMI1.1
durch ein besonders dichtes, homogenes Gefüge, durch Kantenfestigkeit und geringe Hygroskopizität aus und haben ein dem Naturmarmor täuschend ähnliches Aussehen.
Ein besonderer Vorzug des erfindungsgemässen Verfahrens, den Zuschlagstoff als Präzipitat zu gewinnen und beizumengen, besteht darin, dass die erwünschte hohe Kornfeinheit und ein für das Pressen von Kunststeinen besonders günstiges Gefüge der kleinsten Teile ohne den bisher erforderlichen grossen Aufwand an mechanischer Energie und Wärme erzielt wird.
Nachstehend ein Beispiel :
Man mischt 70% hydratisierten Kalk in der Kornfeinheit von mindestens 8000 Maschen/e/K und 30% präzipitierten Kalk innig und setzt der Mischung Farbstoffe entsprechend den beim Fertigerzeugnis gewünschten Farbtönen zu. Das Gemisch wird dann etwas angefeuchtet und in hochglanzpolierten Stahlformen gepresst. Man erhält so bereits Presslinge von hohem Oberflächenglanz und marmorähnlichem Aussehen.
An die Erhärtung des Presslings schliesst sich die an sich bekannte Behandlung (Härtung) mit Kohlensäure und Sauerstoff. In der Endphase wird der Pressling mit verdünnter Oxalsäure behandelt, um die etwa noch vorhandenen Poren zu schliessen und den aufgepressten Oberflächenglanz dauerhaft zu machen. Der so erzielte Kunststein hat eine dichte, hochglänzende Oberfläche und ein dem Naturmarmor täuschend ähnliches Aussehen. Das spezifische Gewicht beträgt etwa 2000 /.
Schliesslich sei noch folgendes bemerkt :
Ohne den Rahmen der Erfindung zu verlassen, kann man als Zuschlagstoffe hochfein gemahlenen Schwerspat oder Speckstein für sich oder in Mischung verwenden. Diese Zuschlagstoffe kann man entweder statt präzipitierten Kalk oder als Beimengung zu diesem anwenden. Sollen Platten erzielt werden, die für Röntgenstrahlen und Radiumstrahlen undurchlässig sind, so wird überwiegend Baryt als Zuschlagstoff verwendet.
Speckstein hingegen wird vorteilhaft verwendet, wenn die Platten besonders hohen Anforderungen hinsichtlich elektrischer Durchschlagsfestigkeit (über 20.000 Volt) genügen sollen.
Im Rahmen der vorstehenden Darlegungen wird unter hoher Kornfeinheit eine Siebfeinheit von mindestens 8000 Maschen/c verstanden.
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Process for the production of artificial stones
EMI1.1
by a particularly dense, homogeneous structure, by edge strength and low hygroscopicity and have an appearance that is deceptively similar to natural marble.
A particular advantage of the process according to the invention of extracting and adding the aggregate as a precipitate is that the desired high grain fineness and a structure of the smallest parts that is particularly favorable for the pressing of artificial stones is achieved without the great expenditure of mechanical energy and heat previously required .
Here is an example:
70% hydrated lime with a grain fineness of at least 8000 mesh / e / K and 30% precipitated lime are intimately mixed and dyes are added to the mixture according to the color shades desired in the finished product. The mixture is then slightly moistened and pressed into highly polished steel molds. In this way, compacts with a high surface gloss and a marble-like appearance are obtained.
The hardening of the pellet is followed by the known treatment (hardening) with carbonic acid and oxygen. In the final phase, the pellet is treated with diluted oxalic acid in order to close any pores that may still be present and to make the pressed-on surface gloss permanent. The artificial stone obtained in this way has a dense, high-gloss surface and an appearance that is deceptively similar to natural marble. The specific weight is about 2000 /.
Finally, the following should be noted:
Without departing from the scope of the invention, extremely finely ground barite or soapstone can be used as additives, either by themselves or as a mixture. These additives can either be used instead of precipitated lime or as an addition to it. If plates are to be obtained that are impermeable to X-rays and radium rays, barite is predominantly used as an additive.
Soapstone, on the other hand, is used to advantage if the panels are to meet particularly high requirements in terms of dielectric strength (over 20,000 volts).
In the context of the above explanations, a high grain fineness is understood to mean a sieve fineness of at least 8000 mesh / c.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT164924T | 1945-11-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT164924B true AT164924B (en) | 1949-12-27 |
Family
ID=3653430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT164924D AT164924B (en) | 1945-11-09 | 1945-11-09 | Process for the production of artificial stones |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT164924B (en) |
-
1945
- 1945-11-09 AT AT164924D patent/AT164924B/en active
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