WO1997006120A1 - Quick setting process for lightweight concrete - Google Patents

Quick setting process for lightweight concrete Download PDF

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Publication number
WO1997006120A1
WO1997006120A1 PCT/AT1996/000143 AT9600143W WO9706120A1 WO 1997006120 A1 WO1997006120 A1 WO 1997006120A1 AT 9600143 W AT9600143 W AT 9600143W WO 9706120 A1 WO9706120 A1 WO 9706120A1
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WO
WIPO (PCT)
Prior art keywords
lightweight concrete
water glass
water
concrete
layer
Prior art date
Application number
PCT/AT1996/000143
Other languages
German (de)
French (fr)
Inventor
Markus Stracke
Matthias Stracke
Original Assignee
Alpha Brevet S.A.
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 Alpha Brevet S.A. filed Critical Alpha Brevet S.A.
Priority to AU68650/96A priority Critical patent/AU6865096A/en
Priority to EP96929118A priority patent/EP0843655A1/en
Publication of WO1997006120A1 publication Critical patent/WO1997006120A1/en

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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
    • 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
    • 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
    • C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
    • C04B28/26—Silicates of the alkali metals
    • 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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • 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
    • C04B41/5089—Silica sols, alkyl, ammonium or alkali metal silicate 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
    • C04B41/65—Coating or impregnation with inorganic materials
    • C04B41/68—Silicic acid; Silicates
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/10—Accelerators; Activators
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/60—Flooring materials
    • C04B2111/62—Self-levelling compositions

Definitions

  • the invention relates to a method for the rapid hardening of lightweight concrete with additives, e.g. EPS, polystyrene, expanded clay, pumice or similar
  • additives e.g. EPS, polystyrene, expanded clay, pumice or similar
  • the object of the invention is therefore to provide a method of the type mentioned at the outset with which an acceleration of the curing process is achieved, so that a substantial reduction in the waiting time required for the follow-up of the construction activity is achieved.
  • this is achieved in that a hardening liquid consisting of water glass or mixtures of water glass and water is applied to or in the light concrete layer to be hardened.
  • the curing time for the lightweight concrete can be significantly reduced without the need for chemicals or other mixing processes.
  • the lightweight concrete is applied as a leveling layer and / or as a heat or sound insulation layer on a substrate.
  • Grain size between 5 and 20mm, preferably between 5 and 10mm.
  • the level compensating lightweight concrete layer has a very open-pored structure, e.g. you choose Grain sizes of up to 5 or 10 mm or even larger, the bulk densities of EPS lightweight concrete being selectable between 150 to 400 kg / ⁇ rr according to a variant of the invention.
  • Aggregate grains is distributed, and that the tool factor is between 0.25 and 0.35.
  • Sodium water glass or potassium water glass can also be used as the water glass.
  • Curing liquid is sprayed onto the lightweight concrete surface.
  • the hardening liquid is distributed under pressure by means of spray lances which are pushed into the middle of the lightweight concrete layer.
  • Hose lines for air drainage are also laid.
  • Drainage lines are guided and then drained off.
  • the mixing ratio of water to water glass is chosen 2: 1, 1: 1 or 2: 1.
  • Light concrete leveling layer sprayed "quick hardening liquid” such as water glass or mixtures of water with water glass, e.g. 1 part water, 2 parts water glass, or
  • the lightweight concrete level compensation such as EPS concrete
  • EPS concrete first mixed with "lack of water”
  • the added cement content is evenly distributed around the aggregate grains (EPS particles, possibly also other materials such as sand, brick split, or the like).
  • This "installation” is almost as if it were “sand”, so dry can be mixed, e.g. with tool factor 0.25-0.35. This is particularly useful for thin installation layers.
  • the material is then sprayed on site (e.g. watering can) or better spraying device with air pressure sprayers similar to the "painting tool”. Due to the lack of water during the first mixing, this material, which is not even properly moist, absorbs the accelerating liquid "greedily”, and hardens even earlier than those mixtures which are mixed with "normal” Wz factor water.
  • the extreme porosity of the lightweight concrete then selected Larger particle sizes, for example 6-20 mm
  • successfully porous hose lines of approximately 15 to 25 mm in diameter or even smaller (or larger in the case of large bed thicknesses of the lightweight concrete) are inserted into the lightweight concrete mass at a lateral distance of approximately 1.5 meters .
  • the hose ends should be able to be connected to the outside air at suitable points. Due to the extremely loose structure of the lightweight concrete, residual moisture can be routed horizontally within the structure to the porous air drainage lines in a short time and then disappear.
  • the method according to the invention is also suitable for other purposes of rapid hardening of surfaces or through-and-through hardening of lightweight concrete. Because there was the unexpected fact that even with spray lances, which are pushed into the middle of the layer, for example with meter-thick lightweight concrete, and then "distribute" the hardener liquid under pressure (eg 2 bar or more) - also there the internal hardening in every position of the Structure is possible. For example, large-scale consolidation can be made possible as a safeguard against natural forces (dams, risk of falling rocks, tunnel protection ).
  • premixed lightweight concrete materials which are mixed with retarding liquids for the transport time expenditure (for example, for a delay effect of up to 24 hours), can be transported in sacks, big bags, or loosely on the truck over long distances, in order to then be transported Bring the place to solidification or hardening within a few minutes to the extent that the securing purpose is fulfilled.
  • the "high" concentration of retarder added to the lightweight concrete mix has no adverse effects on the accelerability with, for example, water glass or water glass-water emulsions.
  • the rapid hardening processes according to the invention can also be used successfully, for example, in prefabricated house construction, so that assembly line production can be carried out undisturbed.
  • the gaps in the interior of wooden bar constructions are filled with EPS lightweight concrete (which have lambda values of 0.05 W / mK to 0.08 W / mK and are fire-proof) and during the manufacture of the wall or ceiling elements
  • EPS lightweight concrete which have lambda values of 0.05 W / mK to 0.08 W / mK and are fire-proof

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  • 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)

Abstract

A quick setting process is disclosed for lighweight concrete containing lightweight aggregates such as EPS, styropor, swelling clay, pumice stone or the like. A setting liquid that consists of water glass or a mixture of water glass and water is sprayed on or injected into the lightweight concrete layer.

Description

Verfahren zur Schnellaushärtung von Leichtbeton Process for the rapid hardening of lightweight concrete
Die Erfindung betrifft ein Verfahren zur Schnellaushärtung von Leichtbeton mit Zuschlagstoffen, z.B. EPS, Styropor, Blähton, Bims o.a..The invention relates to a method for the rapid hardening of lightweight concrete with additives, e.g. EPS, polystyrene, expanded clay, pumice or similar
Bekannt sind Verfahren zur raschen Estrichaufbringung, indem niveauausgleichende Platten, Sand, oder sonstige feste Stoffe auf die Fußbodenkonstruktion aufgelegt werden, wobei sofort der normgemäße Schwerbetonestrich aufgebracht werden kann. Allerdings müssen dabei die Platten (EPS-Schaumplatten etc.) sehr genau auf zumeist vorhandene Unebenheiten angepaßt werden.Processes for the rapid application of screed are known, in that level-compensating slabs, sand or other solid substances are placed on the floor construction, it being possible to apply the heavy concrete screed according to the standard immediately. However, the panels (EPS foam panels etc.) must be adapted very precisely to the most common bumps.
Oder diese müssen bei am Fußboden verlegten Leitungen entsprechend ausgespart werden. Sand ist kein guter Dämmstoff für Wärmeübergänge. Auch weicht dieser beim Betreten während der Schwerbetonestrichverlegung "um die Schuhabdrücke" der Arbeitsmannschaft herum aus, sodaß unerwünschte Niveauunregelmäßigkeiten entstehen. Wenn jedoch Leichtbetone wie Blähtonbeton, EPS-Leichtbeton (Prottelith, oder Styroporbeton o.dgl., wie Bimsbeton) frisch abgemischt (mit Zementleim gebunden) als niveauausgleichende Wärmedämm-Trittschallschluckschicht zuerst aufgebracht werden, so muß einige Tage zugewartet werden, damit der Zementleim zumindest etwas erhärtet, und diese ansonsten sehr verletzliche Schicht soweit begehbar ist, daß der nachfolgend aufzubrin¬ gende Schwerbetonestrich z.B. in 5 cm Stärke (oder Heizestrich für Fußbodenheizungen mit vorheriger Heizleitungsverlegung) verlegbar wird.Or these have to be cut out accordingly with cables laid on the floor. Sand is not a good insulation material for heat transfer. This also evades when entering the heavy concrete screed laying "around the footprints" of the work team, so that undesirable level irregularities arise. However, if lightweight concrete such as expanded clay concrete, EPS lightweight concrete (Prottelith, or polystyrene concrete or the like, such as pumice concrete) is freshly mixed (bonded with cement paste) as a level-compensating thermal insulation impact sound absorbing layer, a few days must be waited so that the cement paste at least something hardens, and this otherwise very vulnerable layer can be walked on to such an extent that the heavy concrete screed to be applied subsequently, for example in 5 cm thickness (or heating screed for underfloor heating with prior heating cable installation).
Die Aufgabe der Erfindung besteht daher darin, ein Verfahren der eingangs genannten Art anzugeben, mit dem eine Beschleunigung des Aushärtevorganges erzielt wird, sodaß damit eine wesentliche Reduktion der erforderlichen Wartezeit für die Weiterverfolgung der Bautätigkeit erreicht wird.The object of the invention is therefore to provide a method of the type mentioned at the outset with which an acceleration of the curing process is achieved, so that a substantial reduction in the waiting time required for the follow-up of the construction activity is achieved.
Erfindungsgemäß wird dies dadurch erreicht, daß eine Aushärteflüssigkeit, bestehend aus Wasserglas oder Mischungen aus Wasserglas und Wasser, auf oder in die auszuhärtende Leichtbetonschicht auf bzw. eingebracht wird.According to the invention, this is achieved in that a hardening liquid consisting of water glass or mixtures of water glass and water is applied to or in the light concrete layer to be hardened.
Dadurch kann die Aushärtezeit für den Leichtbeton ohne großen Aufwand an Chemikalien oder sonstigen Mischvorgängen bedeutend reduziert werden.As a result, the curing time for the lightweight concrete can be significantly reduced without the need for chemicals or other mixing processes.
In weiterer Ausbildung der Erfindung kann vorgesehen sein, daß der Leichtbeton als Niveauausgleichsschicht und/oder als Wärme- bzw. Schalldämmschicht auf einen Untergrund aufgebracht wird.In a further embodiment of the invention it can be provided that the lightweight concrete is applied as a leveling layer and / or as a heat or sound insulation layer on a substrate.
Dadurch wird die Möglichkeit geschaffen, etwa an Deckenaufbauten den Schwerbetonestrich praktisch wenige Stunden oder Minuten nach Aufbringung der erwünschten Leichtbeton-, Wärmedämm-, Trittschalldämm- und Niveauausgleichsschicht (oft ist diese Schicht nur wenige cm, z.B. 3-10 cm, dick, oder sehr stark, z.B. 0,5 m und mehr) in einem Arbeitszyklus am gleichen Tag aufzubringen, wobei so vorgegangen wird, daß z.B. auf die Leichtbetonoberfläche Flüssigkeiten wie Wasserglas (Natronwasserglas oder Kaliwasserglas) oder Mischungen aus Wasser mit Wasserglas aufgesprüht werden. In weiterer Ausbildung der Erfindung kann vorgesehen sein, daß die Zuschlagstoffe eineThis creates the possibility, for example, of the heavy concrete screed on ceiling structures practically a few hours or minutes after application of the desired lightweight concrete, thermal insulation, impact sound insulation and leveling layer (often this layer is only a few cm, e.g. 3-10 cm thick or very strong , for example 0.5 m and more) in one working cycle on the same day, with the procedure being such that liquids such as water glass (sodium water glass or potassium water glass) or mixtures of water with water glass are sprayed onto the light concrete surface. In a further embodiment of the invention, it can be provided that the additives
Korngröße zwischen 5 und 20mm, vorzugsweise zwischen 5 und 10mm, aufweisen.Grain size between 5 and 20mm, preferably between 5 and 10mm.
Die Niveauausgleichs-Leichtbetonschicht besitzt eine sehr offenporige Struktur, man wählt z.B. Korngrößen von bis zu 5 oder 10 mm oder noch größer, wobei bei EPS-Leichtbetonen die Rohdichten gemäß einer Variante der Erfindung zwischen 150 bis 400 kg/ιrr wählbar sind.The level compensating lightweight concrete layer has a very open-pored structure, e.g. you choose Grain sizes of up to 5 or 10 mm or even larger, the bulk densities of EPS lightweight concrete being selectable between 150 to 400 kg / ιrr according to a variant of the invention.
In weiterer Ausbildung der Erfindung kann vorgesehen sein, daß der Leichtbeton mitIn a further embodiment of the invention it can be provided that the lightweight concrete with
Wassermangel gemischt wird, sodaß der Zementanteil ungefähr gleichmäßig um dieLack of water is mixed so that the cement portion is approximately evenly around the
Zuschlagkörner verteilt ist, und daß der Wz-Faktor zwischen 0,25 und 0,35 beträgt.Aggregate grains is distributed, and that the tool factor is between 0.25 and 0.35.
Eine solche Vorgangsweise ist besonders bei dünnen Einbauschichtstärken einerSuch a procedure is one particularly with thin installation layer thicknesses
Aushärtezeitverringerung förderlich.Reduction of curing time conducive.
Weiters kann als Wasserglas Natronwasserglas oder Kaliwasserglas verwendet werden.Sodium water glass or potassium water glass can also be used as the water glass.
Bei diesen Arten von Wasserglas hat sich eine besonders vorteilhafte Wirkung derThese types of water glass have a particularly beneficial effect
Aushärtezeitverringerung ergeben.Cure time reduction result.
Gemäß einem anderen Merkmal der Erfindung kann vorgesehen sein, daß dieAccording to another feature of the invention it can be provided that the
Aushärteflüssigkeit auf die Leichtbetonoberfläche aufgesprüht wird.Curing liquid is sprayed onto the lightweight concrete surface.
Durch das Aufsprühen wird besonders an der Oberfläche der Leichtbetonschicht eineBy spraying one is particularly on the surface of the lightweight concrete layer
Beschleunigung der Aushärtezeit erreicht.Acceleration of curing time reached.
In weiterer Ausbildung der Erfindung kann vorgesehen sein, daß die Aushärteflüssigkeit mittels Sprühlanzen, die in die Leichtbetonschichtmitte geschoben werden, unter Druck verteilt wird.In a further embodiment of the invention it can be provided that the hardening liquid is distributed under pressure by means of spray lances which are pushed into the middle of the lightweight concrete layer.
Dadurch kann eine Aushärtung auch im Inneren der Leichtbetonschicht erreicht werden, wodurch eine sehr wirkungsvolle Verfestigung der Schicht möglich ist.As a result, curing can also be achieved in the interior of the lightweight concrete layer, which enables very effective consolidation of the layer.
Gemäß einer anderen Variante der Erfindung können im Leichtbeton poröseAccording to another variant of the invention can be porous in lightweight concrete
Schlauchleitungen zur Luftdrainage mitverlegt werden.Hose lines for air drainage are also laid.
Dadurch können Restfeuchteanteile in kurzer Zeit innerhalb der Leichtbetonschicht zu denThis allows residual moisture to evaporate within a short time within the lightweight concrete layer
Drainageleitungen geführt und danach abgeführt werden.Drainage lines are guided and then drained off.
In weiterer Ausbildung der Erfindung kann vorgesehen sein, daß das Mischungsverhältnis von Wasser zu Wasserglas 2:1, 1 :1 oder 2:1 gewählt wird.In a further embodiment of the invention it can be provided that the mixing ratio of water to water glass is chosen 2: 1, 1: 1 or 2: 1.
Für diese Mischungsverhältnisse ergibt sich eine besonders rasche und wirkungsvolleThese mixing ratios result in a particularly quick and effective one
Durchhärtung der Leichtbetonschicht.Through hardening of the lightweight concrete layer.
Eine weitere Variante der Erfindung kann in der Verwendung des erfindungsgemäßenAnother variant of the invention can be used using the invention
Verfahrens zur Füllung von Wandzwischenräumen bestehen.Process for filling gaps between walls exist.
Nachstehend wird die Erfindung anhand von Ausführungsbeispielen eingehend erläutert.The invention is explained in detail below on the basis of exemplary embodiments.
Bei durchgeführten Versuchen zeigte es sich, daß die nachträglich (nach Einbau derIn tests carried out, it was found that the (after installing the
Leichtbeton-Niveauausgleichsschicht) aufgesprühte "Schnellhärteflüssigkeit" wie Wasserglas oder Mischungen aus Wasser mit Wasserglas, z.B. 1 Teil Wasser, 2 Teile Wasserglas, oderLight concrete leveling layer) sprayed "quick hardening liquid" such as water glass or mixtures of water with water glass, e.g. 1 part water, 2 parts water glass, or
1 :1 Wasser/Wasserglas, oder umgekehrt 2 Teile Wasser, 1 Teil Wasserglas, überraschenderweise aufgrund der extremen Offenporigkeit der absichtlich so hergestellten leichten Niveauausgleichsleichtbetone außerordentlich tief (und rasch) in das Gefüge des Leichtbetones eindringt. Offensichtlich durch die besonders gute kapillare Leitfähigkeit der dünnen Zementsteinschichten, welche die Hauptzuschlagsstoffe, wie EPS-Stückchen (welche vorzugsweise aus zerkleinerten EPS-Verpackungen zu gewinnen sind) umhüllen, begünstigt dadurch, daß die Zwickelräume zwischen den einzelnen Zuschlagstoffteilchen praktisch nicht mit Zementstein (vorher Zementleim) verfüllt sind.1: 1 water / water glass, or vice versa 2 parts water, 1 part water glass, surprisingly due to the extreme open porosity of the lightweight leveling lightweight concrete thus deliberately made extremely deep (and fast) into the structure of the Light concrete penetrates. Obviously, due to the particularly good capillary conductivity of the thin layers of cement stone, which cover the main aggregates, such as EPS pieces (which are preferably obtained from shredded EPS packaging), the fact that the gusset spaces between the individual aggregate particles practically do not contain cement paste (previously cement paste ) are filled.
Dabei ist nun die Möglichkeit einer extrem raschen Rücktrockenzeit hergestellt, weil praktisch eine direkte Belüftung des Innengefüges der Leichtbetonmasse gegeben ist. Erfahrungsgemäß genügen oft nur 0,5 bis 1 Liter Beschleunigungsflüssigkeit je m Leichtbetonoberfläche, je nach Anteil der Wasserglasbestandteile ist die Erhärtung so rasch erfolgt, daß schon nach wenigen Minuten oder Stunden, z.B. 2 Stunden, ohne weiteres die Oberfläche des Leichtbetones so verfestigt ist, daß der Schwerbetonestrich normal - ohne besondere Vorkehrungen treffen zu müssen - aufbringbar (einbaubar) ist. Damit haben nun die Estrichleger die Möglichkeit erhalten, daß an einem Tage mit demselben Maschinenpark, z.B. Estrichfördergerät für den Leichtbetonausgleich, ebenfalls der Schwerbetonestrich aufgebracht werden kann. Die Arbeitspartie braucht nun nicht mehrmals die Baustelle zu besuchen, - das spart erheblich an Zeit und Kosten. Eine weitere Ausführungsmethode (Verfahren) darf noch erwähnt werden: Erfindungsgemäß kann der Leichtbeton-Niveauausgleich, wie z.B. EPS-Beton, zunächst mit "Wassermangel" abgemischt gefördert und eingebaut werden - Hauptsache, der beigegebene Zementanteil ist gleichmäßig um die Zuschlagstoffkörner (EPS-Teilchen, ggfs. auch zusätzliche andere Stoffe, wie Sand, Ziegelsplit, o.dgl.) verteilt. Dieser "Einbau" erfolgt fast so, als ob es sich um "Sand" handeln würde, so trocken kann gemischt werden, z.B. mit Wz Faktor 0,25-0,35. Dies bewährt sich besonders bei dünnen Einbau-Schichtstärken. Nach Einbau erfolgt dann erst die Besprühung deses Materials vor Ort (z.B. Gießkanne) oder besser Sprüheinrichtung mit Luftdrucksprühern ähnlich dem "Malerwerkzeug". Zufolge des Wassermangels bei der Erstabmischung nimmt dieses nicht einmal richtig erdfeuchte Material die Beschleunigungsflüssigkeit "gierig" auf, und erhärtet noch früher als jene Mischungen, welche mit "normalen " Wz Faktor- Wasseranteilen abgemischt sind.The possibility of an extremely rapid drying time is now created because there is practically direct ventilation of the inner structure of the lightweight concrete mass. Experience has shown that often only 0.5 to 1 liter of accelerating fluid per m of lightweight concrete surface is sufficient, depending on the proportion of the water glass components, the hardening takes place so quickly that after only a few minutes or hours, e.g. 2 hours, without further ado the surface of the lightweight concrete is so solid that the heavy concrete screed can be applied (installed) normally - without having to take any special precautions. This now gives screed layers the opportunity to use the same machinery, e.g. Screed conveyor for lightweight concrete leveling, also the heavy concrete screed can be applied. The work party no longer needs to visit the construction site, which saves a great deal of time and money. Another execution method (method) may still be mentioned: According to the invention, the lightweight concrete level compensation, such as EPS concrete, first mixed with "lack of water", must be conveyed and installed - the main thing is that the added cement content is evenly distributed around the aggregate grains (EPS particles, possibly also other materials such as sand, brick split, or the like). This "installation" is almost as if it were "sand", so dry can be mixed, e.g. with tool factor 0.25-0.35. This is particularly useful for thin installation layers. After installation, the material is then sprayed on site (e.g. watering can) or better spraying device with air pressure sprayers similar to the "painting tool". Due to the lack of water during the first mixing, this material, which is not even properly moist, absorbs the accelerating liquid "greedily", and hardens even earlier than those mixtures which are mixed with "normal" Wz factor water.
Dort wo die Austrocknung der Restfeuchte des Leichtbeton-Niveauausgleiches nicht durch den Unterbau erfolgen kann, wie dies bei Holzdecken-Konstruktionen völlig ausreichend möglich ist (weil ja obenauf der Schwerbetonestrich nur sehr langsame Trocknungen zuläßt) können nun aufgrund der dann gewählten extremen Porigkeit des Leichtbetones (größere Korngrößen, z.B. 6-20 mm) erfolgreich poröse Schlauchleitungen ca. 15 bis 25 mm Durchmesser oder noch kleiner (oder größer bei großen Schüttschichtstärken des Leichtbeto¬ nes) im seitlichen Abstand von etwa 1,5 Metern in die Leichtbetonmasse mit eingelegt wer¬ den. Dabei sollen die Schlauchenden an geeigneten Stellen mit der Außenraumluft in Verbin¬ dung stehen können. Durch die extrem lockere Gefügeanordnung des Leichtbetones können solcherart Restfeuchten in kurzer Zeit innerhalb des Gefüges horizontal zu den porösen Luftdrainageleitungen geführt werden, und verschwinden. Natürlich ist das erfindungsgemäße Verfahren auch für andere Zwecke der Schnellhärtung von Oberflächen oder durch-und-durch-Härtungen von Leichtbetonen geeignet. Denn es zeigte sich die unerwartete Tatsache, daß sogar mit Sprühlanzen, welche z.B. bei meterdicken Leichtbetonen in die Schichtmitte geschoben werden, und dann unter Druck (z.B. 2 bar oder mehr) die Härterflüssigkeit "verteilen" - auch dort die innere Erhärtung in jeder Position des Gefüges möglich ist. So können z.B. auf schnellste Art großflächige Verfestigungen als Sicherung gegen Naturgewalten (Dämme, Steinschlaggefahr, Tunnelabsicherungen ..) möglich gemacht werden. Es können dabei größte Mengen an vor¬ gemischten Leichtbetonmaterialien, welche für den Transportzeitaufwand mit Verzögerer¬ flüssigkeiten versetzt sind (z.B. für bis zu 24 Stunden Verzögerungswirkung) in Säcken, Big Bags, oder lose auf dem Lkw über weiteste Strecken transportiert werden, um sodann vor Ort innerhalb weniger Minuten zur Erstarrung oder Erhärtung soweit zu bringen, daß der Siche¬ rungszweck erfüllt wird. Es zeigte sich nämlich erstaunlicherweise, daß die "hohe" Konzen¬ tration an Verzögererzusatz zur Leichtbetonmischung keinerlei nachteilige Wirkungen auf die Beschleunigbarkeit mit z.B. Wasserglas oder Wasserglas- Wasser- Emulsionen hat. Auch können z.B. im Fertighausbau die erfindungsgemäßen Schnellhärteverfahren erfolgreich angewendet werden, damit die Fließbandfertigung ungestört erfolgen kann. Dabei werden die Zwischenräume im Wandinneren von Holzriegelbauten mit EPS- Leichtbetonmasse (welche Lambda- Werte von 0,05 W/mK bis 0,08 W/mK aufweisen und dabei feuersicher sind) gefüllt, und im Zuge der Herstellung der Wand- oder Deckenele¬ mente wird der frisch gefüllte - sich in alle Winkel pressende Leichtbeton mittels des erfin¬ dungsgemäßen Schnellhärteverfahrens verfestigt, sodaß der Produktionsablauf ungehindert (ohne Wartezeiten auf Leichtbetonerhärtung) vor sich gehen kann.Where the residual moisture of the lightweight concrete level compensation cannot dry out through the substructure, as is entirely possible with wooden ceiling constructions (because the heavy concrete screed on the top only allows very slow drying), the extreme porosity of the lightweight concrete then selected ( Larger particle sizes, for example 6-20 mm), successfully porous hose lines of approximately 15 to 25 mm in diameter or even smaller (or larger in the case of large bed thicknesses of the lightweight concrete) are inserted into the lightweight concrete mass at a lateral distance of approximately 1.5 meters . The hose ends should be able to be connected to the outside air at suitable points. Due to the extremely loose structure of the lightweight concrete, residual moisture can be routed horizontally within the structure to the porous air drainage lines in a short time and then disappear. Of course, the method according to the invention is also suitable for other purposes of rapid hardening of surfaces or through-and-through hardening of lightweight concrete. Because there was the unexpected fact that even with spray lances, which are pushed into the middle of the layer, for example with meter-thick lightweight concrete, and then "distribute" the hardener liquid under pressure (eg 2 bar or more) - also there the internal hardening in every position of the Structure is possible. For example, large-scale consolidation can be made possible as a safeguard against natural forces (dams, risk of falling rocks, tunnel protection ...). Large quantities of premixed lightweight concrete materials, which are mixed with retarding liquids for the transport time expenditure (for example, for a delay effect of up to 24 hours), can be transported in sacks, big bags, or loosely on the truck over long distances, in order to then be transported Bring the place to solidification or hardening within a few minutes to the extent that the securing purpose is fulfilled. It was surprisingly shown that the "high" concentration of retarder added to the lightweight concrete mix has no adverse effects on the accelerability with, for example, water glass or water glass-water emulsions. The rapid hardening processes according to the invention can also be used successfully, for example, in prefabricated house construction, so that assembly line production can be carried out undisturbed. The gaps in the interior of wooden bar constructions are filled with EPS lightweight concrete (which have lambda values of 0.05 W / mK to 0.08 W / mK and are fire-proof) and during the manufacture of the wall or ceiling elements The freshly filled lightweight concrete, which presses into all angles, is solidified by means of the rapid hardening method according to the invention, so that the production process can proceed unhindered (without waiting for light concrete hardening).
Eine Vielzahl von Anwendungen des erfindungsgemäßen Verfahrens, auch im Wege- und Straßenbau, ist zwar nicht genannt worden, jedoch möglich.A large number of applications of the method according to the invention, including in road and road construction, have not been mentioned, but are possible.
Nachforschungen ergaben, daß durch die Anwendung des Natronsilikats oder Kalisilikats keine nachteiligen Wirkungen auf das Zementsteingefüge erwachsen. Im Laufe der Jahre erfolgt lediglich eine Verkieselung, welche zu höheren Gefügefestigkeiten führen kann. Research showed that the use of sodium silicate or potassium silicate did not have any adverse effects on the cement stone structure. Over the years, only silicification takes place, which can lead to higher structural strengths.

Claims

Patentansprüche: Claims:
1. Verfahren zur Schnellaushärtung von Leichtbeton mit Zuschlagstoffen, z.B. EPS, Styropor, Blähton, Bims o.a. dadurch gekennzeichnet, daß eine Aushärteflüssigkeit, i bestehend aus Wasserglas oder Mischungen aus Wasserglas und Wasser, auf oder in die auszuhärtende Leichtbetonschicht auf bzw. eingebracht wird.1.Procedure for the rapid hardening of lightweight concrete with additives, e.g. EPS, polystyrene, expanded clay, pumice or similar characterized in that a hardening liquid, i consisting of water glass or mixtures of water glass and water, is placed on or in the light concrete layer to be hardened.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Leichtbeton als Niveauausgleichsschicht und/oder als Wärme- bzw. Schalldämmschicht auf einen Untergrund aufgebracht wird.2. The method according to claim 1, characterized in that the lightweight concrete is applied as a leveling layer and / or as a heat or sound insulation layer on a substrate.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Leichtbeton eine Rohdichte zwischen 150 und 400 kg/nr aufweist.3. The method according to claim 1 or 2, characterized in that the lightweight concrete has a bulk density between 150 and 400 kg / nr.
4. Verfahren nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß die Zuschlagstoffe eine Korngröße zwischen 5 und 20mm, vorzugsweise zwischen 5 und 10mm, aufweisen.4. The method according to claim 1, 2 or 3, characterized in that the additives have a grain size between 5 and 20mm, preferably between 5 and 10mm.
5. Verfahren nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß der Leichtbeton mit Wassermangel gemischt wird, sodaß der Zementanteil ungefähr gleichmäßig um die Zuschlagkörner verteilt ist, und daß der Wz-Faktor zwischen 0,25 und 0,35 beträgt.5. The method according to claim 1 to 4, characterized in that the lightweight concrete is mixed with lack of water, so that the cement portion is distributed approximately evenly around the aggregate, and that the tool factor is between 0.25 and 0.35.
6. Verfahren nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß als Wasserglas Natronwasserglas oder Kaliwasserglas verwendet wird.6. The method according to claim 1 to 5, characterized in that sodium water glass or potassium water glass is used as the water glass.
7. Verfahren nach Anspruch 1 bis 6, dadurch gekennzeichnet, daß die Aushärteflüssigkeit auf die Leichtbetonoberfläche aufgesprüht wird.7. The method according to claim 1 to 6, characterized in that the curing liquid is sprayed onto the lightweight concrete surface.
8. Verfahren nach Anspruch 1 bis 6, dadurch gekennzeichnet, daß die8. The method according to claim 1 to 6, characterized in that the
Aushärteflüssigkeit mittels Sprühlanzen, die in die Leichtbetonschichtmitte geschoben werden, unter Druck verteilt wird.Hardening liquid is distributed under pressure using spray lances that are pushed into the middle of the lightweight concrete layer.
9. Verfahren nach Anspruch 1 bis 8, dadurch gekennzeichnet, daß im Leichtbeton poröse Schlauchleitungen zur Luftdrainage mitverlegt werden.9. The method according to claim 1 to 8, characterized in that porous hose lines for air drainage are co-installed in the lightweight concrete.
10. Verfahren nach Anspruch 1 bis 9, dadurch gekennzeichnet, daß das Mischungsverhältnis von Wasser zu Wasserglas 2:1, 1 :1 oder 2:1 gewählt wird.10. The method according to claim 1 to 9, characterized in that the mixing ratio of water to water glass 2: 1, 1: 1 or 2: 1 is selected.
11. Verwendung des Verfahrens nach Anspruch 1 bis 10 zur Füllung von Wandzwischenräumen. 11. Use of the method according to claim 1 to 10 for filling wall spaces.
PCT/AT1996/000143 1995-08-09 1996-08-09 Quick setting process for lightweight concrete WO1997006120A1 (en)

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WO1997032827A1 (en) * 1996-03-04 1997-09-12 Regina Wetter Process for the production of floor substructures
EP0968978A1 (en) * 1998-05-26 2000-01-05 Fuji Chemical Co., Ltd. Concrete structure constructing method and concrete used therein
US7942658B1 (en) 1999-09-15 2011-05-17 Advanced Building Systems, Inc. Systems for forming lightweight concrete block
WO2011161383A1 (en) * 2010-06-24 2011-12-29 Lafarge Method for transporting a hydraulic composition
AT509521A3 (en) * 2010-03-10 2012-01-15 Markus Ing Stracke METHOD FOR PRODUCING LIGHTWEIGHT CONCRETE ELEMENTS
WO2021018694A1 (en) 2019-07-23 2021-02-04 Agemos AG Inorganic polymers and use thereof in composite materials
EP4029843A1 (en) 2021-01-19 2022-07-20 Agemos AG Sustainable goods
EP4119520A1 (en) * 2021-07-09 2023-01-18 Fels-Werke GmbH Levelling mortar with sealing function

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997032827A1 (en) * 1996-03-04 1997-09-12 Regina Wetter Process for the production of floor substructures
EP0968978A1 (en) * 1998-05-26 2000-01-05 Fuji Chemical Co., Ltd. Concrete structure constructing method and concrete used therein
US7942658B1 (en) 1999-09-15 2011-05-17 Advanced Building Systems, Inc. Systems for forming lightweight concrete block
AT509521A3 (en) * 2010-03-10 2012-01-15 Markus Ing Stracke METHOD FOR PRODUCING LIGHTWEIGHT CONCRETE ELEMENTS
WO2011161383A1 (en) * 2010-06-24 2011-12-29 Lafarge Method for transporting a hydraulic composition
FR2961807A1 (en) * 2010-06-24 2011-12-30 Lafarge Sa METHOD OF TRANSPORTING A HYDRAULIC COMPOSITION
WO2021018694A1 (en) 2019-07-23 2021-02-04 Agemos AG Inorganic polymers and use thereof in composite materials
EP4029843A1 (en) 2021-01-19 2022-07-20 Agemos AG Sustainable goods
EP4119520A1 (en) * 2021-07-09 2023-01-18 Fels-Werke GmbH Levelling mortar with sealing function

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