DE1001174B - Process for the hardening of components - Google Patents

Process for the hardening of components

Info

Publication number
DE1001174B
DE1001174B DEB18728A DEB0018728A DE1001174B DE 1001174 B DE1001174 B DE 1001174B DE B18728 A DEB18728 A DE B18728A DE B0018728 A DEB0018728 A DE B0018728A DE 1001174 B DE1001174 B DE 1001174B
Authority
DE
Germany
Prior art keywords
hardening
steam
water
components
anhydrite
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.)
Pending
Application number
DEB18728A
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.)
BADISCHE BAU und KUNSTSTOFF G
Original Assignee
BADISCHE BAU und KUNSTSTOFF G
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 BADISCHE BAU und KUNSTSTOFF G filed Critical BADISCHE BAU und KUNSTSTOFF G
Priority to DEB18728A priority Critical patent/DE1001174B/en
Publication of DE1001174B publication Critical patent/DE1001174B/en
Pending 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
    • C04B40/00Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/02Selection of the hardening environment

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Description

Verfahren zur Härtung von Bauelementen Die Herstellung von Bauelementen, wie Steine, Platten, Gesimse, Treppen u. ä., aus natürlichem oder synthetischem, feingemahlenem An'hyd@ri:t mit Wasser unter Zugabe von geringen Me Ingen Kalk, Zement oder Sulfaten .isst bekannt. Der Nachteil dieses Verfahrens besteht nun darin, daß man bds zur völligen Aushärtung diie Bauielemente einige Wochen lagern muß, uni die Endhärte zu erhalten, was neben anderen Nachteilen einen erheblichen Lagerraum verlangt. Weiterhin sinkt die Druckfestigkeit von Baustoffen aus Anhydir.it wesentlich ab, falls man Zuschläge organischer oder anorganischer Nat.wr über das Verhältnis 1 : 2 hinaus zusetzt. Um die erforderliche Zeit bis zurr Endhärte von Bauelementen aus Anhydrit abzukürzen, hat man schon versucht, die- fertigen Stücke bei hoher Luftfeuchtigkeit zu lagern. Es zeigte sich aber dabei, daß die Druckfestigkeit so behandelter Produkte wesentlich tiefer lag als die luftgetrockneter Erzeugnisse und diese erst nachträglich an der Luft nachih:ärteite:n.Process for hardening construction elements The production of construction elements, such as stones, slabs, cornices, stairs, etc., made of natural or synthetic, finely ground an'hyd @ ri: t with water with the addition of a small amount of Me Ingen lime, cement or sulfates. eats well known. The disadvantage of this method is that Both the building elements have to be stored for a few weeks for complete hardening, uni to maintain the final hardness, which, among other disadvantages, requires considerable storage space demands. Furthermore, the compressive strength of building materials made from Anhydir.it decreases significantly from, if one adds organic or inorganic Nat.wr over the ratio 1: 2 added. About the time required to final hardening of components Attempts have already been made to shorten the finished pieces from anhydrite at high To store humidity. It was found, however, that the compressive strength was so treated products was significantly lower than that of air-dried products and only afterwards afterwards in the air: ärteite: n.

Es ist bekannt, ein Gemisch von Sand und gebranntem Gips zu Formkörpern zu verarbeiten und. diese mit Wasserdampf zu behandeln. Hierbei soll der Sand reaktionsfähig gemwht werden, damit er sich mit Gips teilweise zu Calcium.silicat umsetzt, welches den Gegenständen eine höhere Festigkeit verleiht. Eine beschleunigende Abbindewirkung des Wasserdampfes auf den Gips findet hierbei nicht statt, da diese an sich schon in relativ kurzer Zeit beendet ist.It is known to use a mixture of sand and plaster of paris to form moldings to process and. treat them with steam. Here, the sand should be reactive be mowed so that it partially converts with plaster of paris to calcium silicate, which gives the objects greater strength. An accelerating setting effect of the water vapor on the plaster does not take place here, as this in itself finished in a relatively short time.

Es wurde nun gefunden, daß die viele Tage beanspruchende Erhärtung des Anhydrites, die im wesentldchen auf einer Rekri.stallisation und n.irJht auf einer einfachen Waasseraufna!hme beruht, unter dem Einfluß von Wasserdämpf, .insbesondere überhitztem Wasserdampf, so stark beschleunigt werden kann, daß solche aus Anhydrit bestehenden Formkörper schon nach Stunden ihre Endhärte erreichen und eine erheblich größere Festigkeit besitzen als :solche, die wochenlang bis zur Endhärtung gelagert wurden. Eine derartig vorteilhafte Wirkung konnte nicht ohne weIteres vorausgesehen werden.It has now been found that the hardening which takes many days of anhydrite, which is essentially due to a recrystallization and afterwards a simple water intake, under the influence of water vapor, in particular superheated steam, can be accelerated so much that such from anhydrite existing moldings reach their final hardness after hours and a considerable amount have greater strength than: those that have been stored for weeks until final hardening became. Such a beneficial effect could not be foreseen without further ado will.

Solche mit heißem Wasserdampf .gehärteten Bauelemente sind nach dem Abkühlen sofort transportabel und verarbeitbar.Such components hardened with hot steam are after Can be transported and processed immediately after cooling.

Die durch dieses Dämpfen erzielte höhere Druckfestigkeit gestattet, höhere Mengen von Zuschlägen zuzusetzen oder auch solche Zusätze anzuwenden, die, wie z. B. Holz, den Enhärtungsvorgamg sonst verzögern. An anorganischen Zuschlägen kommen neben ; Sand, Ziegelsplitt u. ä. auch solche in Frage, die, wie Bims; Schlacke, Blähtone, das Raumgewicht verringern oder, wie Traß, Santorinerde, Bentonit, die Wasserfestigkeit erhöhen, oder, wie organische Stoffe, z. B. Kunstharze, Bitumen und. Bitumenemulsdon, d(ie Zähigkeit und steigern.The higher compressive strength achieved by this steaming allows to add higher amounts of additives or to use additives that, such as B. wood, otherwise delay the Enhärtungsvorgamg. In inorganic aggregates come next; Sand, brick chippings and the like also include those that, like pumice; Slag, Expanded clays, reduce the density or, like trass, Santorini earth, bentonite, the Increase water resistance, or how organic substances, e.g. B. synthetic resins, bitumen and. Bitumen emulsdon, d (ie toughness and increase.

Durch überhitzten Dampf isst eine noch sdhnel,lere und ihöhere Erhärtung zu erreichen. Zum Dämpfen eignen sich alle üblichen Dampfräume oder Dampfkessel, die zweckmäßig so: gebaut sind, daß man auf Wagen gestapelte Baumaterialien, ohne sie umzuladen, dämpfen kann.Due to overheated steam you can eat even less, less and more hardening to reach. All common steam rooms or steam boilers are suitable for steaming, which are purposefully built in such a way that building materials can be stacked on wagons without it can reload, dampen.

Beispiel Platten werden aus 100 kg Anhydrit, der mit 2 kg Kalk versetzt ist, unter Zusatz von 19 kg Wasser in üblicher Art und Weise, z. B. durch Pressen und Rütteln, hergestellt. Der Erhärtungsprozeß dauert an der Luft 14 Tage, beim Dämpfen in heißem (95°) Wasserdampf 8 Stunden. Die Prüfung der Druckfestigkeit der luftgetrockneten Platten ergab nach 14 Tagen 442 kg/.cm2, die der gedämpften Platten nach 12 Stunden Behandlung 570 kg/cm2.Example panels are made from 100 kg of anhydrite to which 2 kg of lime are added is, with the addition of 19 kg of water in the usual manner, for. B. by pressing and shaking. The hardening process takes 14 days in the air Steam in hot (95 °) steam for 8 hours. Testing the compressive strength of the air-dried panels yielded 442 kg / .cm2 after 14 days, that of the damped panels after 12 hours of treatment 570 kg / cm2.

Claims (1)

PATENTANSPRUCH: Verfahren zur Härtung von Bauelementen, welche durch Formung aus natürlichem oder synthetischem Anhydrit mittels Wasser, abbindebeschleunigenden und gegebenenfalls weiteren die Isolierfähigkeit, Elastizität, Wasser- bzw. Korrosionsfestigkeit usw. verbessernden Zuschlägen in bekannter Weise hergestellt sind, dadurch gekennzeichnet, daß diese Körper nach Beginn des Abbindeprozesses mittels Wasserdampf, der überhitzt sein kann, bei gewöhnlichem oder erhöhtem Druck behandelt werden. In Betracht gezogene Druckschriften: Deutsche Patentschriften Nr. 385 454, 809 537, 814 578; USA.-Patentschrift Nr. 2 574 507;PATENT CLAIM: Process for the hardening of components, which by Forming from natural or synthetic anhydrite by means of water, setting accelerator and, if necessary, further insulation properties, elasticity, water and corrosion resistance etc. improving supplements are produced in a known manner, characterized in that that these bodies after the start of the setting process by means of steam, which overheats can be treated under normal or increased pressure. Considered Publications: German Patent Nos. 385 454, 809 537, 814 578; U.S. Patent No. 2,574,507;
DEB18728A 1952-01-21 1952-01-21 Process for the hardening of components Pending DE1001174B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB18728A DE1001174B (en) 1952-01-21 1952-01-21 Process for the hardening of components

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB18728A DE1001174B (en) 1952-01-21 1952-01-21 Process for the hardening of components

Publications (1)

Publication Number Publication Date
DE1001174B true DE1001174B (en) 1957-01-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEB18728A Pending DE1001174B (en) 1952-01-21 1952-01-21 Process for the hardening of components

Country Status (1)

Country Link
DE (1) DE1001174B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1162255B (en) * 1960-08-09 1964-01-30 Rigips Baustoffwerke G M B H Process for the production of cardboard-coated composite building boards made of plaster of paris and / or anhydrite
DE2808782A1 (en) * 1977-03-02 1978-09-07 Ib Schreiner Hansen CLAY PIGEON AND METHOD FOR PRODUCING IT
US4568087A (en) * 1978-01-03 1986-02-04 Hansen Ib Schreiner Non-toxic clay pigeon

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE385454C (en) * 1923-02-14 1923-11-23 Carl Brandt Dipl Ing Process for the production of stones, slabs and other bodies from a mixture of plaster of paris and sand
DE809537C (en) * 1950-05-03 1951-07-30 Badische Bau U Kunststoff G M Process for the production of glazed panels
DE814578C (en) * 1950-05-20 1951-09-24 Badische Bau Und Kunststoff G Process for making dense porcelain-like products
US2574507A (en) * 1947-12-17 1951-11-13 Weber Herman Setting and binding material and its manufacture

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE385454C (en) * 1923-02-14 1923-11-23 Carl Brandt Dipl Ing Process for the production of stones, slabs and other bodies from a mixture of plaster of paris and sand
US2574507A (en) * 1947-12-17 1951-11-13 Weber Herman Setting and binding material and its manufacture
DE809537C (en) * 1950-05-03 1951-07-30 Badische Bau U Kunststoff G M Process for the production of glazed panels
DE814578C (en) * 1950-05-20 1951-09-24 Badische Bau Und Kunststoff G Process for making dense porcelain-like products

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1162255B (en) * 1960-08-09 1964-01-30 Rigips Baustoffwerke G M B H Process for the production of cardboard-coated composite building boards made of plaster of paris and / or anhydrite
DE2808782A1 (en) * 1977-03-02 1978-09-07 Ib Schreiner Hansen CLAY PIGEON AND METHOD FOR PRODUCING IT
US4568087A (en) * 1978-01-03 1986-02-04 Hansen Ib Schreiner Non-toxic clay pigeon

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