WO1989009196A1 - Liant pour granules poreux hydrophiles - Google Patents

Liant pour granules poreux hydrophiles Download PDF

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Publication number
WO1989009196A1
WO1989009196A1 PCT/CH1989/000064 CH8900064W WO8909196A1 WO 1989009196 A1 WO1989009196 A1 WO 1989009196A1 CH 8900064 W CH8900064 W CH 8900064W WO 8909196 A1 WO8909196 A1 WO 8909196A1
Authority
WO
WIPO (PCT)
Prior art keywords
cement
emulsion
synthetic resin
binder
binder according
Prior art date
Application number
PCT/CH1989/000064
Other languages
German (de)
English (en)
Inventor
Hans Dietrich Sulzer
Original Assignee
Hans Dietrich Sulzer
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 Hans Dietrich Sulzer filed Critical Hans Dietrich Sulzer
Publication of WO1989009196A1 publication Critical patent/WO1989009196A1/fr

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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
    • C04B28/06—Aluminous 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
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B26/06—Acrylates
    • 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

Definitions

  • the present invention relates to a binder for binding a porous, hydrophilic granulate.
  • Coring is the most radical constructional measure, and often only the facades of the old building remain. The construction within this shell often proves to be more expensive than a new building, which is why coring is generally only an option for buildings worthy of protection.
  • the expanded clay as aluminum inosilica - even after firing - is highly hydrophilic and can absorb larger amounts of water through adsorption. This property is further increased by the structure of the expanded clay.
  • the unbroken grain is presented as round granules with a brown, somewhat rough or cracked surface.
  • a section through a grain shows a thin microporous, fine capillary marginal zone, the burning skin.
  • the inside of the grain is dark gray to black in color and has a cell structure. Countless small cells are separated from each other by thin clay walls.
  • the large, active surface of the expanded clay kernels tends to quickly adsorb water molecules and bind them quite firmly. Due to its cracks and fine capillary structure, the outer skin does not block the ingress of water. This can easily let in and wet the inner cell walls.
  • the expanded clay absorbs water very quickly; after just a few minutes, over 10% of its own weight.
  • the expanded clay dries out slowly due to the strong adsorption forces already mentioned on the alumino-silica surface. It takes several days to remove half of the adsorbed water. At normal air humidity, the car drying process can take months.
  • Binding expanded clay with cement is not particularly difficult. However, care must be taken to ensure that the granulate is either thoroughly wetted before the cement is added, or that the cement slurry is heavily diluted with water. If these measures are not taken and the usual cement-water mixing ratio is used, almost all of the water is adsorbed into the interior of the granulate and there is no longer enough water around the cement particles to allow them to hydrate.
  • this object is achieved by a binder which contains a concentrated synthetic resin emulsion.
  • the solids content of the emulsion should preferably be at most 10% below the maximum possible solids content of the emulsion in question for reasons of stability.
  • undiluted synthetic resin emulsions are used for the binder according to the invention in concentrations which are usually brought onto the market by the manufacturers.
  • Acrylic emulsions are particularly suitable as synthetic resin emulsions.
  • a pure acrylate emulsion a styrene-acrylate copolymer emulsion can also be used, for example.
  • binder according to the invention in particular when using expanded clay as granules, light, very good heat and sound-insulating, sufficiently quick-drying, coherent and also fire-proof layers can be produced, which are particularly useful as leveling layers for floors, for plasters or partitions are well suited.
  • Further porous granules suitable for binding with the binder according to the invention are, for example, pearlite, vermiculite or pumice
  • an emulsion of such a synthetic resin which has a certain elasticity or plasticity after the evaporation of the emulsion water.
  • the desired degree of elasticity or plasticity can be achieved and adjusted in a controlled manner, in particular by a mixture of different synthetic resin emulsions become.
  • acrylic emulsions are particularly suitable. Good results were achieved, for example, with two acrylic emulsions from the Rohm ⁇ Haas Company, Chicago, USA with the designation LC 67 and EP 5231 in a mixing ratio of 1: 1.
  • Compensating layers for wooden floors made with such an emulsion can easily take part in the small movements of the wooden floors without changing the relative position of the granules to one another. Due to the elastic binding of the grains, the vibration energy of the floors or the supporting beam system is partially destroyed. The ground oscillations are damped in an advantageous manner. The leveling compound produced in this way acts as excellent impact sound absorption.
  • the binder in addition to the concentrated synthetic resin emulsion, also contains an additive which is able to chemically bind part of the emulsion water after a time which is sufficient for processing, for example a few hours. This significantly reduces the time required for drying out because the entire emulsion water no longer has to evaporate.
  • a suitable additive for this purpose is, for example, cement, in particular an aluminate cement.
  • Aluminum cement can be up to 80% of its Bind weight to water.
  • aluminum cement is pH-neutral, which is important with regard to the stability of the emulsion.
  • cement as an additive results in further important advantages.
  • cement in particular aluminate cement
  • a viscous, gel-like mass of high viscosity is created. This holds the entire emulsion water in itself.
  • This gel-like mass can practically not penetrate into granules with a microporous surface such as, for example, expanded clay granules. It remains essentially as a wetting layer in the area between the grains, from which the emulsion water can evaporate much more easily than from the interior of the granules. This results in an additional considerable reduction in the drying time.
  • a granulate layer or mass bound with a gel of the aforementioned type can even dry out within such a short time that the added cement does not find enough time to hydrate. If the cement does not set or only incompletely, the gel forms a tough, fairly plastic mass after drying. With regard to some applications, this can be desirable and advantageous.
  • cement mixtures or so-called reaction accelerators can be used.
  • a suitable cement mixture consists, for example, of a mixture of aluminate cement and Portland cement. Such a mixture is a fast binder with a suitable mixing ratio.
  • Portland cement it should be noted that it is strongly alkaline.
  • Fibers can also be added to the binder.
  • the binder contains a concentrated synthetic resin emulsion.
  • the emulsion should therefore be highly concentrated in order to introduce as little moisture as possible into the granules to be bound.
  • the possible solids content of an emulsion depends on its stability limit, which for some emulsions is already below 50% by weight. The manufacturers of the emulsions usually bring these with a solids content of only a few% by weight below their stability limit to the trade to save transport weight.
  • the emulsions used for the binder according to the invention are preferably not further diluted.
  • the solids content of the emulsion used should in any case not be significantly more than 10% by weight below the maximum possible solids content for reasons of stability, but in any case in the range between 25-70% by weight, preferably even in the range between 45-65% by weight .-%.
  • the synthetic resin of the emulsion used should have good adhesion on mineral bases and should form a coherent mass or film after the emulsion water has evaporated. It should be somewhat elastic or plastic (crack elongation greater than 50%, preferably about 250%) and should not become brittle due to aging.
  • the desired properties have, in particular, acrylic resins, as are also used for the production of joint cement. Good results have also been achieved with a mixture of a first acrylic emulsion with a solids content of 47% by weight with a second acrylic emulsion with a solids content of 65% by weight. in a mixing ratio of about 1: 1, again using the emulsions from Rohm ⁇ Haas mentioned above.
  • Emulsified resins such as acrylic are present in the emulsion water in the form of small beads with a diameter of about 1 / im. Becomes If a resin emulsion is mixed with a loose expanded clay granulate, the synthetic resin beads, but also the emulsion water, accumulate on the expanded clay. When the emulsion water evaporates, the disperse resin beads mentioned merge with one another to form a film between the individual granules, which binds them together.
  • the synthetic resin ilm connecting the expanded clay grains is shown hatched and designated by 3.
  • the two expanded clay granules 1, 2, as is usual with expanded clay, have a cracked, porous combustion skin 2.1 or 3.1 and each have a cell structure inside.
  • a not inconsiderable part of a pure synthetic resin emulsion can penetrate through the cracks and pores of the burning skin of the expanded clay granules and is therefore lost for the granulate bond.
  • a substantial reduction in the time required for drying out and a substantial saving in the amount of binder required for the binding results from the addition of cement, in particular aluminate cement, to the synthetic resin emulsion used.
  • cement in particular aluminate cement
  • the result is a viscous, gel-like mass. If these are mixed with expanded clay granulate, the expanded clay granules can be coated easily. Because the emulsion water is trapped in the gel, it does not penetrate into the interior of the granulate and is also not adsorbed on the clay surface.
  • the synthetic resin comes into direct contact with the surface of the expanded clay grains, where it forms an adhesive film. Due to the high viscosity of the gel, the granules are coated without any loss of binder.
  • the cracks in the burning skin of expanded clay granules are simply bridged, as e.g. is the case with a coat of paint.
  • the binding layer between the granules is typically a few 1/100 mm thick and results in a very firm bond between the grains after the water has been removed.
  • the water is removed from the thin binder layer between the granules on the one hand very quickly by evaporation. On the other hand, part of the emulsion water is through bound the cement.
  • FIG. 2 shows, in a representation corresponding to FIG. 1, two expanded clay granules 4 and 5, respectively, which were bound by means of a synthetic resin emulsion cement gel.
  • the binder layer 6 bridges the cracks in the grains 4 and 5 without penetrating them.
  • a gel is preferably used to produce the said gel
  • the evaporation of the emulsion water from the binder layer usually takes place so rapidly that less than 10% of the cement can hydrate. It also appears that the hydration of the cement is disturbed in the presence of synthetic resin emulsion and is considerably slower than is otherwise customary. As a result, the resin properties outweigh the cement properties of the mixture: the bond between the grains is essentially determined by the plasticity of the synthetic resin. A layer of expanded clay bonded with a plastic synthetic resin can be deformed somewhat without breaking. If you want to achieve a more rigid and strong bond between the grains, you have to ensure that the water intended for hydration remains in the binder layer for a sufficiently long time.
  • brick flour to the synthetic resin emulsion cement gel.
  • Brick powder adsorbs part of the emulsion water and holds it within the binder layer for a long time: the water is progressively absorbed by the cement for hydration and extracted from the brick powder.
  • reaction accelerator a more rapid Aus ⁇ decision of the hydration products of the cement grains obtain, so-called reaction accelerator may be used.
  • Resin emulsion aluminum cement: Portland cement as 1:
  • the two types of cement are preferably mixed together before they are added to the emulsion.
  • Synthetic resin emulsion brick flour: aluminum cement: Portland cement as 1: 0.15: 1: 0.2
  • the brick flour is preferably stirred into the emulsion before the cement mixture.
  • Resin emulsion gypsum: aluminum cement like 1: 0.7: 1
  • the amount of a binder mixed according to the above examples required for binding depends, of course, on its grain size. With a grain size in the range between 10 - 20mm, approx. 15g binder per liter of granulate can be sufficient for expanded clay. Conversely, it may be necessary to diameter of less than 3mm to use up to 300g binder per liter of granulate.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

Un liant pour granulés poreux hydrophiles contient une émulsion concentrée de résine synthétique et de préférence également du ciment et d'autres additifs. Ce liant convient surtout pour lier de l'argile expansée afin de former des couches d'égalisation de planchers, de crépis, de cloisons, d'isolations ou similaires pour l'aménagement intérieur. Les couches d'argile expansée liées avec ce liant sèchent en quelques jours au maximum et présentent de manière avantageuse une certaine élasticité lorsque l'on utilise de l'acrylique comme résine synthétique.
PCT/CH1989/000064 1988-03-30 1989-03-30 Liant pour granules poreux hydrophiles WO1989009196A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1206/88-9 1988-03-30
CH120688 1988-03-30

Publications (1)

Publication Number Publication Date
WO1989009196A1 true WO1989009196A1 (fr) 1989-10-05

Family

ID=4204984

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1989/000064 WO1989009196A1 (fr) 1988-03-30 1989-03-30 Liant pour granules poreux hydrophiles

Country Status (1)

Country Link
WO (1) WO1989009196A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2281907A (en) * 1993-09-16 1995-03-22 B & T Polymers Ltd Cement products
EP0710633A1 (fr) * 1994-11-07 1996-05-08 Hoechst Aktiengesellschaft Béton de drainage
NL1033235C2 (nl) * 2007-01-16 2008-07-17 Force B V C Gefixeerde voegverbinding.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3819556A (en) * 1971-09-30 1974-06-25 Mitsubishi Petrochemical Co Corrosion resistant processing
US4313997A (en) * 1980-07-14 1982-02-02 Grefco, Inc. Perlite boards and method for making same
EP0065758A2 (fr) * 1981-05-22 1982-12-01 Stotmeister GmbH Stuc acoustique
EP0083959A1 (fr) * 1982-01-05 1983-07-20 Polycell Products Limited Composition de filler léger
US4562109A (en) * 1984-08-31 1985-12-31 The Goodyear Tire & Rubber Company Crack resistant coating for masonry structures and process for applying same
US4686253A (en) * 1986-02-20 1987-08-11 United States Gypsum Company Lightweight joint compound having improved paintability

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3819556A (en) * 1971-09-30 1974-06-25 Mitsubishi Petrochemical Co Corrosion resistant processing
US4313997A (en) * 1980-07-14 1982-02-02 Grefco, Inc. Perlite boards and method for making same
EP0065758A2 (fr) * 1981-05-22 1982-12-01 Stotmeister GmbH Stuc acoustique
EP0083959A1 (fr) * 1982-01-05 1983-07-20 Polycell Products Limited Composition de filler léger
US4562109A (en) * 1984-08-31 1985-12-31 The Goodyear Tire & Rubber Company Crack resistant coating for masonry structures and process for applying same
US4686253A (en) * 1986-02-20 1987-08-11 United States Gypsum Company Lightweight joint compound having improved paintability

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2281907A (en) * 1993-09-16 1995-03-22 B & T Polymers Ltd Cement products
US5514744A (en) * 1993-09-16 1996-05-07 B & T Polymers Limited Cement products and a method of manufacture thereof
EP0710633A1 (fr) * 1994-11-07 1996-05-08 Hoechst Aktiengesellschaft Béton de drainage
US5861057A (en) * 1994-11-07 1999-01-19 Hoechst Aktiengesellschaft Drainage concrete
NL1033235C2 (nl) * 2007-01-16 2008-07-17 Force B V C Gefixeerde voegverbinding.
EP1961714A1 (fr) * 2007-01-16 2008-08-27 C-Force B.V. Fixation d'un joint

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