EP0465486A1 - Procede de fabrication d'un objet a surface vernie avec un liant au moins potentiellement hydraulique - Google Patents

Procede de fabrication d'un objet a surface vernie avec un liant au moins potentiellement hydraulique

Info

Publication number
EP0465486A1
EP0465486A1 EP19900904602 EP90904602A EP0465486A1 EP 0465486 A1 EP0465486 A1 EP 0465486A1 EP 19900904602 EP19900904602 EP 19900904602 EP 90904602 A EP90904602 A EP 90904602A EP 0465486 A1 EP0465486 A1 EP 0465486A1
Authority
EP
European Patent Office
Prior art keywords
binder
component
proviso
forming
coating
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.)
Withdrawn
Application number
EP19900904602
Other languages
German (de)
English (en)
Inventor
Ivan Odler
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.)
KERASAL OBERFLACHENSCHUTZ GmbH
Original Assignee
KERASAL OBERFLACHENSCHUTZ GmbH
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 KERASAL OBERFLACHENSCHUTZ GmbH filed Critical KERASAL OBERFLACHENSCHUTZ GmbH
Publication of EP0465486A1 publication Critical patent/EP0465486A1/fr
Withdrawn legal-status Critical Current

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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/4505—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements characterised by the method of application
    • C04B41/4523—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements characterised by the method of application applied from the molten state ; Thermal spraying, e.g. plasma spraying
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5022—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with vitreous materials
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5076—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with masses bonded by inorganic 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
    • C04B41/61—Coating or impregnation
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
    • C04B41/61—Coating or impregnation
    • C04B41/65—Coating or impregnation with inorganic materials

Definitions

  • the invention relates to a method for producing a body glazed on the surface based on an at least latently hydraulic binder.
  • body encompasses molded parts of all kinds, such as containers, pipes, plates, but also monolithic structures that are either to be glazed in-situ on their surface or provided with a coating from which the glaze is then formed.
  • inorganic, latent hydraulic binder stands for known binders and binder systems, for example made of or based on Portland cement, alumina cement or the like, with or without additives (e.g. blastfurnace slag, raft, fly ash) and / or additives.
  • the invention also encompasses processes for the production of glazed concrete bodies.
  • organic binder also stands for known binders of this type such as starch, dextrin, lignin, polyvinyl alcohol etc.
  • binders of this type such as starch, dextrin, lignin, polyvinyl alcohol etc.
  • the glazing of a conventional concrete using conventional cements, in particular Portland cement, has recently been proposed (Interbrick, Vol. 3, No. 2, 1987, 30). However, the method described there is practically not feasible.
  • a glaze such as is used, for example, for coating ceramic molded parts, must be heated to temperatures between 900 and 1100 ° C. during glazing in order to achieve a melting phase.
  • a cement-bound base body produced using conventional inorganic binders such as Portland cement, in such a temperature range over a corresponding time interval, this would lead to decomposition of the calcium silicate hydrates formed in the concrete body, and tests have shown that a loss of strength of the concrete body of 80% and more occurs from about 300 ° C. It is obvious that a stable molded body cannot be obtained in a glazing process which takes a few hours. The water released from the calcium silicate hydrates also creates bubbles which also do not allow a uniform glaze application.
  • quartz is proposed as an additive in the aforementioned publication, this additive will ultimately also lead to a disturbance of the base body made of concrete during the glazing due to the known quartz jump.
  • the invention is based on the object of demonstrating a possibility of how a body is based on a at least latent hydraulic, especially inorganic binders can be glazed while maintaining the strength as far as possible.
  • the aim is to be able to use conventional binders.
  • the invention is based on the knowledge that this aim can be achieved in two alternative, but closely related ways, in each case a glaze melting at high temperature can be applied to a hydraulically bound and consequently only to a limited extent thermally stable body, if instead of the whole Body only the layer intended for melting (the subsequent surface glaze) is heated. It was also recognized that the mass (filler) provided as glaze must be bound to the surface of the base body using a binder. When organic binders are used, they are thermally broken down during glazing; in the case of inorganic binders, constituents of the binder remain in the glaze.
  • an inorganic binder If an inorganic binder is used, appropriate additives, which form a eutectic with the binder even under short-term temperature stress and at temperatures well below the melting temperature of the hydrated binder, can be used to lower the temperature for the formation of the glaze. Even a brief exposure to temperature of only a few seconds is usually sufficient to form the melt phase, as a result of which the material underneath is not subjected to any significant temperature stresses, as a result of which the loss of strength described at the outset can be avoided.
  • the part to be glazed can either be the surface of the body itself or a coating applied to a preformed body.
  • an in-situ glazing is practically achieved, while the second variant requires a two-stage process, in which a body is first formed and then a coating is applied to this body.
  • the two-stage procedure is recommended.
  • a coating of the organic binder (component A) and a low-melting material (component B) in a mixture with a liquid such as water is applied to a given body, the melting temperature of component B, however, being equal to or higher than the decomposition temperature of the organic binder so that it can burn out during the subsequent temperature treatment.
  • the organic binder primarily serves to hold the coating on the body (to bind). Subsequent drying improves the bond between the coating and the body.
  • feldspar namely feldspar, blast furnace slag and / or slag sand, feldspar is preferred.
  • a hydrated inorganic cement or concrete has a melting temperature of well above 1,300 ° C, the addition of the substances mentioned leads to a reduction in the temperature at which a first melting phase is formed to about 900 ° C and lower.
  • a ceramic frit in particular a frit containing Pb, is used as component B. Frits or glass powder mixtures are particularly advantageous in the sense of the invention, especially since individual frits have melting temperatures of only 700 ° C. to 1,000 ° C.
  • the component forming the melt phase should have a grain size of less than 1 mm, preferably in powder form. The finer the material, the more reactive it is. In this case, a few seconds are enough to form a melt phase in the outer surface area of the body.
  • a major advantage of the process is that conventional binders can be used.
  • Portland cement or alumina cement are mentioned as examples of inorganic binders and dextrin or lignin as organic binders.
  • a combination of both binder systems is also possible.
  • Other inorganic, at least latently hydraulic, binders can also be used.
  • some of the cement can be replaced by fly ash or other pozzolana materials.
  • inert additives to the binder phase in order to form a mortar or concrete, in particular when using the in-situ method according to claim 2.
  • Basalt, corundum, wollastonite, broken bricks or the like are suitable as inert additives .
  • the aggregate can be processed in a conventional manner, in particular in lumpy or granular form.
  • iron oxide in these supplements also has a positive effect in the sense of lowering the melting temperature in the surface of the body, since iron oxide also acts as a flux.
  • a water glass in combination with a silicon fluoride is mentioned as an example.
  • the silicon fluoride is preferably a sodium or potassium silicofluoride, in particular a sodium silicon hexafluoride.
  • Such a binder shows the following reaction mechanism
  • the binder then forms a highly dispersed three-dimensional framework made of amorphous silica, which is suitable for achieving favorable strength values.
  • the coating applied to a body can be very thin, for example less than 1 mm.
  • the layer then melts to the surface of the (base) body.
  • a thicker coating for example greater than 2 mm can also be applied, so that after the glaze has melted between the glaze and the (base) body there is still a non-melted transition area. remains.
  • the heat treatment of the body produced by the process and thus the glazing can be carried out in various ways.
  • a flame can be applied directly to the surface.
  • infrared radiation or electrical heating is also possible.
  • a method is particularly preferred in which the heating unit is continuously guided over the surface of the body formed, in such a way that individual surface sections of the body are only exposed to the temperature load for a few seconds, for example 3 to 10 seconds. this time being sufficient to form a smelting phase on the surface which, after the heating device has continued, cools to form a solid glaze.
  • the defective concrete part can be coated with a coating according to claims 1 or 2.
  • the newly applied layer connects to the base material. After the coating has been hydrated and hardened, it is glazed - as described above - and in this way a closed, dense glazed surface is formed, which makes the corresponding part particularly resistant to chemical attacks in particular.
  • the invention thus offers a surprisingly simple possibility of producing glazed bodies or forming a base body with a glazed surface, and that - as stated - not only for the production of new molded parts, but also for the repair of existing bodies.
  • the strength of the hydrated base material is practically completely maintained due to the briefly reduced temperature effect compared to conventional ceramic glazing processes.
  • Bodies produced by the method according to the invention can be used in a wide variety of areas. They can be produced inexpensively, since conventional binders or concretes can be used, and the production is unproblematic since both the preparation and the glazing do not require any special devices or production techniques.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Aftertreatments Of Artificial And Natural Stones (AREA)

Abstract

Procédé de fabrication d'un objet à surface vernie avec un liant au moins potentiellement hydraulique.
EP19900904602 1989-04-06 1990-03-21 Procede de fabrication d'un objet a surface vernie avec un liant au moins potentiellement hydraulique Withdrawn EP0465486A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893911117 DE3911117C1 (fr) 1989-04-06 1989-04-06
DE3911117 1989-04-06

Publications (1)

Publication Number Publication Date
EP0465486A1 true EP0465486A1 (fr) 1992-01-15

Family

ID=6377978

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900904602 Withdrawn EP0465486A1 (fr) 1989-04-06 1990-03-21 Procede de fabrication d'un objet a surface vernie avec un liant au moins potentiellement hydraulique

Country Status (4)

Country Link
EP (1) EP0465486A1 (fr)
JP (1) JPH05500792A (fr)
DE (1) DE3911117C1 (fr)
WO (1) WO1990011983A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10014160A1 (de) * 2000-03-22 2001-09-27 Metten Stein & Design Gmbh Verfahren zum Herstellen und/oder Behandeln von aus Beton hergestellten Körpern

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR530222A (fr) * 1921-01-27 1921-12-17 Procédé d'imperméabilisation et de décoration des constructions et objets mobiliers en béton ou ciment armé
DE594150C (de) * 1932-09-29 1934-03-13 Max Stern Verfahren zur Herstellung von Glasuren auf Betongegenstaenden
GB1337391A (en) * 1970-02-13 1973-11-14 United States Borax Chem Treating surfaces of building materials
CH538943A (de) * 1972-04-13 1973-07-15 Wienerberger Baustoffind Ag Verfahren zur Herstellung einer Beschichtung eines Trägerkörpers
DE2848214A1 (de) * 1978-11-07 1980-05-08 Julius Aberle Verfahren zur kaltemaillierung von bauelementen und nach diesem verfahren hergestelltes bauelement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9011983A1 *

Also Published As

Publication number Publication date
JPH05500792A (ja) 1993-02-18
DE3911117C1 (fr) 1990-10-18
WO1990011983A1 (fr) 1990-10-18

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