CH299648A - Process for the production of porous gypsum masses and building elements. - Google Patents
Process for the production of porous gypsum masses and building elements.Info
- Publication number
- CH299648A CH299648A CH299648DA CH299648A CH 299648 A CH299648 A CH 299648A CH 299648D A CH299648D A CH 299648DA CH 299648 A CH299648 A CH 299648A
- Authority
- CH
- Switzerland
- Prior art keywords
- gypsum
- added
- mixture
- cac03
- acid
- 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
- C04B11/00—Calcium sulfate cements
-
- 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
- C04B22/12—Acids or salts thereof containing halogen in the anion
-
- 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
- C04B28/14—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 calcium sulfate cements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
Verfahren zur Herstellung poröser Gipsmassen und Bauelemente. Die Erfindung betrifft ein Verfahren zur Herstellung poröser Gipsmassen. Es sind Ver fahren bekannt, nach denen beim Anrühren des Gipses nach Zusatz besonderer gasabspal tender Stoffe, wie Wasserstoffsuperoxyd, Chlorkalk, Aluminium- oder Zinkstaub, po röse Gipsmassen hergestellt werden. Die hier mit erzeugten porigen Gipsmassen weisen durchwegs geringe Härte und schlechte Wit terungsbeständigkeit auf.
Erfindungsgemäss wird zur Erzielung von porösen Gipsmassen einem CaC03-haltigen Gipsgemenge beim Anrühren mit Wasser min destens eine Mineralsäure zugegeben. Dadurch können poröse Gipsmassen von hoher Festig keit und guter Witterungsbeständigkeit her gestellt werden.
Ein Vorteil dieses Verfahrens liegt darin, dass als CaC03-haltiges Gipsgemenge ;sowohl Gips verarbeitet werden kann, der aus bisher als minderwertig bezeichnetem kalkhaltigem Gipsgestein gebrannt wurde; als auch Gips, dem Kalkstein oder kalkhaltiger Sand zuge- mahlen oder in feinem Zustand zugemischt wurde.
Als Zuschlagstoffe können ausserdem staubförmige oder feinkörnige Industrieab fälle wie Steinkohlenflugasche, Braunkohlen flugasche, ölschieferschlacke, Filterberge, Ab fallsande und Ziegelmehl sowie Sägemehl, Bimssand, Kieselgur, Sand, Torf und andere Stoffe in Anwendung kommen.
Vorzugsweise werden technische Mineral.. Säuren, z. B. Salz-, Salpeter- oder Schwefel säure, verwendet.. Das CaC03-haltige Gipsge- menge gibt, bei Zusatz der Säure C02 Gas ab, wodurch in der gegossenen Gipsmischung vor dem Erhärten eine treibende, porenbildende Wirkung erzielt wird. Die Säuren können so wohl einzeln als in. Kombination verwendet werden.
Die Grösse der Poren ist vom CaC03- Gehalt der Gipsmenge und dem Säurezusatz abhängig und kann durch Abstimmung dieser beiden Faktoren reguliert werden. Der der Mischung beträgt zweckmässig min- destens 211/4 und der Säurezusatz ea. 2-6 %,
in der Regel 3 %, des Gewichts der trockenen Stoffe.
Besonders vorteilhaft erwies sich die Ver arbeitung von Gips mit kieselsäurehaltigen Industrieabfällen, die auch noch Aluminium-, Eisen- und Calciumoxyd einzeln oder zu meh reren enthalten, wie z. B. ölschieferschwel- rückstände und Flugasche, insbesondere dann, wenn diese Industrieabfälle bei Kalkbrenn- temperaturen entstanden sind. Bei Anwen dung dieser Zusatzstoffe erhält die Mischung hydraulische Mörteleigenschaften, wodurch be sonders hochwertige Produkte entstehen.
Die Qualität von aus einer solchen Gips masse bestehenden Bauelementen lässt sich noch erhöhen, wenn sie in C02-haltiger Luft, z. B. in Abgasen, gehärtet werden.
Process for the production of porous gypsum masses and building elements. The invention relates to a method for producing porous gypsum masses. There are Ver drive known, after the addition of special gas abspal tender substances, such as hydrogen peroxide, chlorinated lime, aluminum or zinc dust, porous gypsum masses are made when the plaster is mixed. The porous gypsum masses produced here have consistently low hardness and poor weather resistance.
According to the invention, in order to achieve porous gypsum masses, at least one mineral acid is added to a CaCO 3 -containing gypsum mixture when mixed with water. This enables porous gypsum masses of high strength and good weather resistance to be made.
One advantage of this process is that the CaCO 3 -containing gypsum mixture can be processed as well as gypsum that has been burned from calcareous gypsum rock previously described as inferior; as well as gypsum, the limestone or calcareous sand was ground or mixed in in a fine state.
Powdery or fine-grain industrial waste such as hard coal fly ash, brown coal fly ash, oil slate slag, filter mountains, waste sands and brick meal as well as sawdust, pumice sand, kieselguhr, sand, peat and other substances can also be used as aggregates.
Technical mineral acids, e.g. B. hydrochloric, nitric or sulfuric acid is used .. The amount of gypsum containing CaC03 gives off C02 gas when the acid is added, whereby a driving, pore-forming effect is achieved in the cast gypsum mixture before it hardens. The acids can be used individually or in combination.
The size of the pores depends on the CaC03 content of the amount of gypsum and the amount of acid added and can be regulated by coordinating these two factors. That of the mixture is expediently at least 211/4 and the acid addition approx. 2-6%,
usually 3%, of the weight of the dry fabrics.
The processing of gypsum with silicic acid-containing industrial waste, which also contains aluminum, iron and calcium oxide individually or in addition, has proven to be particularly advantageous, such as. B. oil shale residue and fly ash, especially if this industrial waste was generated at lime burning temperatures. When these additives are used, the mixture acquires hydraulic mortar properties, which results in particularly high-quality products.
The quality of such a gypsum mass existing components can still be increased if they are in C02-containing air, for. B. in exhaust gases are hardened.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH299648T | 1951-10-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH299648A true CH299648A (en) | 1954-06-30 |
Family
ID=4490375
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH299648D CH299648A (en) | 1951-10-05 | 1951-10-05 | Process for the production of porous gypsum masses and building elements. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH299648A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994024061A1 (en) * | 1993-04-08 | 1994-10-27 | Saarbergwerke Aktiengesellschaft | Method of manufacturing cement-bonded chipboard |
-
1951
- 1951-10-05 CH CH299648D patent/CH299648A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994024061A1 (en) * | 1993-04-08 | 1994-10-27 | Saarbergwerke Aktiengesellschaft | Method of manufacturing cement-bonded chipboard |
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