DE512325C - Process for the production of a weatherproof gypsum mortar - Google Patents

Process for the production of a weatherproof gypsum mortar

Info

Publication number
DE512325C
DE512325C DER78748D DER0078748D DE512325C DE 512325 C DE512325 C DE 512325C DE R78748 D DER78748 D DE R78748D DE R0078748 D DER0078748 D DE R0078748D DE 512325 C DE512325 C DE 512325C
Authority
DE
Germany
Prior art keywords
plaster
paris
water
production
weatherproof
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
Application number
DER78748D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OTTO RICHTER DR ING
Original Assignee
OTTO RICHTER DR ING
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by OTTO RICHTER DR ING filed Critical OTTO RICHTER DR ING
Priority to DER78748D priority Critical patent/DE512325C/en
Application granted granted Critical
Publication of DE512325C publication Critical patent/DE512325C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14Compositions 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
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/20Retarders
    • C04B2103/22Set retarders

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)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Description

Verfahren zur Herstellung eines wetterfesten Gipsmörtels Das neue Verfahren beruht auf der Verarbeitung von Stuckgips, Modellgips oder Alabastergips unter Zusatz einer verdünnten Lösung von essigsaurer Tonerde in erdfeuchtem oder plastischem Zustande.Method of making a weatherproof gypsum mortar The new one Process is based on the processing of plaster of paris, model plaster or alabaster plaster with the addition of a dilute solution of acetic acid clay in earth-moist or plastic state.

Es ist bekannt, daß gewöhnlicher Gips beim Anmachen mit Wasser eine um so größere Härte und Festigkeit erreicht, je geringer die Menge des zugesetzten Wassers ist. Bei einer Mischung von Gips mit Wasser im Verhältnis 3 : r bis ¢ : i entsteht nach dem Abbinden eine harte Masse, welche auch unter Wasser nicht an Festigkeit und Härte verliert, während ein in gießbarem Zustande angemachter Gips vom Wasser sehr stark erweicht wird. Man konnte nun aber erdfeuchten Gips bisher nur in ganz geringen Mengen verarbeiten, weil er zu rasch abbindet und erstarrt.It is known that ordinary plaster of paris when mixed with water a the greater the hardness and strength achieved, the lower the amount of added Water is. When mixing plaster of paris with water in a ratio of 3: r to ¢: After setting, a hard mass is created which does not stick even under water Strength and hardness lose strength while a plaster of paris made in a castable state is very much softened by the water. You could now but earth-moist plaster previously Process only in very small quantities because it sets and solidifies too quickly.

Um plastischen oder erdfeuchten Gips zu Steinen oder Platten verarbeiten zu können, muß man ein Mittel zusetzen, durch welches die Abbindezeit des Gipises verlängert wird. Verwendet man zu diesem Zwecke Leimwasser, Borax oder andere lösliche Chemikalien, so verliert der abgebundene Gips seine Härte, wenn er längere Zeit der Einwirkung von Wasser ausgesetzt wird. Ein solcher Gips ist also nicht wetterfest.To process plastic or earth-moist gypsum into stones or slabs to be able to, one must add a means by which the setting time of the gypsum is extended. If you use glue water, borax or other soluble ones for this purpose Chemicals, the hardened plaster of paris will lose its hardness if left in place for a long time exposed to the action of water. Such a plaster of paris is therefore not weatherproof.

Es ist auch bereits bekannt, daß Essigsäure und Natriumacetat verzögernd auf die Abbindegeschwindigkeit des Stuckgipses einwirken. Die gleiche Wirkung kann man durch Zusatz von essigsaurer Tonerde zum Anmachewasser des Gipses erzielen. Während nun aber reine Essigsäure sich allmählich verflüchtigt, so daß schließlich keine Spur davon im Gips zurückbleibt, zerfällt essigsaure Tonerde in Essigsäure und Tonerde. Letztere lagert sich in der Gipsmasse ab und bewirkt eine nachträgliche Härtung des abgebundenen Gipses. Würde man essigsaures Natron dem Gips zusetzen, so würde Natron darin zurückbleiben, das aber nicht wie Tonerde härtend wirkt, sondern vom Wasser gelöst wird und zu Ausblühungen Anlaß gibt. Es ist daher mit reiner Essigsäure oder essigsaurem Natron nicht die gleiche Wirkung zu erzielen wie mit Aluminiumacetat.It is also already known that acetic acid and sodium acetate are retarding act on the setting speed of the stucco. Can have the same effect can be achieved by adding acetic clay to the gypsum mixing water. But while pure acetic acid gradually evaporates, so that finally If there is no trace of it left in the plaster of paris, acetic acid clay breaks down into acetic acid and clay. The latter is deposited in the gypsum mass and causes a subsequent Hardening of the set plaster. If one were to add soda acetate to the plaster of paris, then soda would remain in it, but it does not have a hardening effect like clay, but is dissolved by the water and gives rise to efflorescence. It is therefore made with pure acetic acid or baking soda do not achieve the same effect as aluminum acetate.

Rührt man gewöhnlichen Gips mit einer Lösung von essigsaurer Tonerde an, so kann man beobachten, daß dadurch das Abbinden des Gipses sehr stark verzögert wird. Es genügt daher eine stark: mit Wasser verdünnte Lösung von essigsaurer Tonerde, um die Abbindezeit des Gipses so zu verlängern, daß man ihn in knetbarem Zustande gut verarbeiten kann. Da beim Abbinden des Gipses ein Zerfall der essigsauren Tonerde eintritt, entstehen keine löslichen Kristalle in der Gipsmasse. Diese wird infolgedessen vom Wasser nicht angegriffen, auch wenn sie längere Zeit seiner Einwirkung ausgesetzt ist. Durch Zusatz von essigsaurer Tonerde zum Anmachewa#ser von Gips wird es ermöglicht, eine gröpere Menge Gips mit einer so geringen Wassermenge zu ve@ärheiten, daß die abgebundene Gipsmasse infolge des geringen Wassergehaltes einen hohen Härtegrad erreicht und unter Wasser nicht erweicht wird.Ordinary plaster of paris is stirred with a solution of acetic clay on, one can observe that this greatly delays the setting of the plaster of paris will. It is therefore sufficient to use a solution of acetic clay diluted with water, in order to lengthen the setting time of the plaster of paris so that it can be kneaded can handle well. Because when the plaster of paris sets a disintegration of the acetic acid clay occurs, no soluble crystals are formed in the plaster of paris. This will be as a result not attacked by water, even if exposed to its action for a long time is. By adding acetic acid clay to the mixing water from Plaster of paris enables a larger amount of plaster of paris with such a small amount of water to ver @ ärheiten that the set gypsum mass due to the low water content reaches a high degree of hardness and is not softened under water.

Mit Hilfe der nach diesem Verfahren erzeugten Mörtel lassen sich mit Vorteil Gipsbauplatten oder dem Wetter ausgesetzte Plastiken herstellen sowie Rabitzärbeiten o. dgl. im Freien ausführen, zu denen man bisher hochgebrannten atrichgips verwendet hat.With the help of the mortar produced by this process, with Advantage of making plasterboard or weather-exposed sculptures as well as rabbit work o. The like. Run in the open air, for which atrich plaster of paris has been used up to now Has.

Claims (1)

PATENTANSPRUCFI: Verfahren zur Herstellung eines aus Gips, Wasser und einem Acetat bestehenden Mörtels für die Erzeugung von Hartgipsgegenständen, dadurch gekennzeichnet, daß als Acetat essigsaure Tonerde verwendet wird.PATENT CLAIM: Process for the production of a plaster of paris, water and an acetate existing mortar for the production of hard plaster objects, characterized in that acetic acid clay is used as the acetate.
DER78748D 1929-07-24 1929-07-24 Process for the production of a weatherproof gypsum mortar Expired DE512325C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER78748D DE512325C (en) 1929-07-24 1929-07-24 Process for the production of a weatherproof gypsum mortar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER78748D DE512325C (en) 1929-07-24 1929-07-24 Process for the production of a weatherproof gypsum mortar

Publications (1)

Publication Number Publication Date
DE512325C true DE512325C (en) 1930-11-10

Family

ID=7415871

Family Applications (1)

Application Number Title Priority Date Filing Date
DER78748D Expired DE512325C (en) 1929-07-24 1929-07-24 Process for the production of a weatherproof gypsum mortar

Country Status (1)

Country Link
DE (1) DE512325C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE742023C (en) * 1941-02-18 1943-11-20 Ig Farbenindustrie Ag Method of delaying the setting of plaster of paris

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE742023C (en) * 1941-02-18 1943-11-20 Ig Farbenindustrie Ag Method of delaying the setting of plaster of paris

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