EP0768113A1 - Process and device for manufacturing fine cement/ultrafine binder suspensions - Google Patents

Process and device for manufacturing fine cement/ultrafine binder suspensions Download PDF

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Publication number
EP0768113A1
EP0768113A1 EP96114901A EP96114901A EP0768113A1 EP 0768113 A1 EP0768113 A1 EP 0768113A1 EP 96114901 A EP96114901 A EP 96114901A EP 96114901 A EP96114901 A EP 96114901A EP 0768113 A1 EP0768113 A1 EP 0768113A1
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EP
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Prior art keywords
fine
storage container
cement
mixer
pump
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Granted
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EP96114901A
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German (de)
French (fr)
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EP0768113B1 (en
Inventor
Theodor Günther
Wolfgang Dr. Perbix
Günther Schneider
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Dyckerhoff GmbH
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Dyckerhoff GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/02—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions without using driven mechanical means effecting the mixing
    • B28C5/04—Gravitational mixing; Mixing by intermingling streams of ingredients
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/56—Mixing liquids with solids by introducing solids in liquids, e.g. dispersing or dissolving
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3121—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
    • B01F25/53—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle in which the mixture is discharged from and reintroduced into a receptacle through a recirculation tube, into which an additional component is introduced
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/92—Heating or cooling systems for heating the outside of the receptacle, e.g. heated jackets or burners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing

Definitions

  • Ultra-fine cements / ultra-fine binders are increasingly being used in the areas of concrete repair and geotechnical engineering.
  • the cement suspensions made from the ultra-fine cements / ultra-fine binders are used to fill cracks in concrete, cracks and fissures in rock, and pore spaces in loose rock.
  • Fine cements are very fine-grained hydraulic binders with steadily and closely graded particle size distributions and a limitation of the largest particle size.
  • the properties and the use of fine cements are regulated, e.g. in a preliminary leaflet for press-fitting work with very fine binders in loose rock (Bautechnik 70, [1993], number 9, Ernst & Sohn, pages 550 to 560, and ZTV-RISS 93, Verlidblatt document B 5237, fixtureblatt-Verlag).
  • the fine cement should Manufacture of cement suspensions have a sieve passage of ⁇ 95% with a mesh size of 16 ⁇ m (0.016 mm) and are made with suitable additives.
  • the terms and content of the ingredients additives and additives are defined in cement leaflet No. B 3, BBD / KA 1.93 / 20.
  • ultra-fine cements / ultra-fine binders for the measures mentioned can be attributed to the high fineness and, at the same time, the maximum size of the dry binder.
  • particle size distribution of the binder in the suspension is also decisive for the suitability of ultra-fine cements / ultra-fine binders. If the fine cement is insufficiently digested in water, agglomerates can form or remain, which, for example, precludes the injection of fine cement suspensions into the finest concrete cracks.
  • a device for processing and pressing a cement suspension which has a processing area and a pressing area.
  • the preparation area and the pressing area are connected to one another by a connecting line and each have a container, a circuit line and a pump with which the cement suspension can be circulated for preparation or for pressing.
  • This document teaches that a sieve is inserted in the circulation line of the processing area and the containers are each surrounded by a cooling device through which coolant flows. A clumping is to be prevented by the sieve, since the suspension is pressed through the sieve at relatively high pressure, lumps in the suspension being broken up.
  • the invention is based on the object of specifying a method and a device for producing fine cement / fine binder suspensions, with no clumping of the material to be processed as when using high or low speed mixers and with dry powdery additives normally used for fine cement fine binders can be disrupted, overall a completely lump-free suspension is obtained.
  • the invention therefore relates to a process for the preparation of fine cement / fine binder suspensions, in which, in a closed circuit, a quantity of water corresponding to a predetermined recipe is initially introduced into a storage container 1 and is pumped to a mixer 3 working according to the Venturi principle, such as a water jet pump is pumped, the water flowing through the mixer 3 Vacuum generated fine cement / ultra-fine binder is sucked in from a container 4 arranged on the mixer 3 to form a suspension-like mixture and this suspension is transported to the storage container 1, stirring with a stirring device 5, and then the suspension is returned to the circuit at least once by means of the pump 2 and is removed from the circuit at a tapping point 6 after completion of a given preparation.
  • a quantity of water corresponding to a predetermined recipe is initially introduced into a storage container 1 and is pumped to a mixer 3 working according to the Venturi principle, such as a water jet pump is pumped, the water flowing through the mixer 3 Vacuum generated fine cement / ultra-fine binder is
  • an equally fine dry mixture can also be sucked in from the container 4 arranged on the mixer 3.
  • a dry mixture is usually composed of a fine cement / fine binder and one or more additives or additives.
  • Another object of the invention is a device for carrying out the above-mentioned method, characterized by a storage container 1 for water, optionally additives for fine cement / fine binder or for fine cement / fine binder suspensions, a transport line 7a from the storage container 1 to a pump connected downstream of the storage container 1 2, a further transport line 7b from the pump 2 to a mixer 3 operating according to the Venturi principle, such as a water jet pump, to which a container 4 is provided for the addition of fine cement / fine binder or of equally fine dry mixtures, a further transport line 7c from the mixer 3 to the storage container 1, and through a removal point 6 connected to the pump 2 via a transport line 7d, the arrangement of the storage container 1, pump 2 and mixer 3 being such that these are cyclically connected in series via the transport lines 7 are.
  • the device shown in FIG. 1 for the production of fine cement / fine binder suspensions comprises a storage container 1 provided with an agitator 5, which can be charged with water and optionally with additives and / or additives customary for fine cement / fine binder.
  • Transport lines 7a and 7b lead from the storage container 1 to the pump 2 and further to a mixer 3 which works according to the Venturi principle, such as a water jet pump, which is equipped with a container 4, via which the addition of fine cement / fine binder or equally fine dry mixtures takes place .
  • the ultrafine cement / ultrafine binder or the dry mixture is sucked out of the container 4 into the water flowing through the mixer 3 to form a suspension-like mixture and transported back to the reservoir 1 via the transport line 7c.
  • the suspension can now be pumped from the storage container 1 again to the mixer 3 at least once by means of the pump 2 and mixed with further fine cement / ultrafine binder and is then pumped back again to the storage container 1, this process also being able to be repeated several times until a desired water: cement - Ratio is set and the additives are optimally distributed and open in the suspension.
  • the storage container (1) can be heated or cooled by means of a heating or cooling device depending on the outside temperature , so that the fine cement / fine binder suspension is adjustable to an exact optimal temperature range.
  • the suspension is circulated at least once or several times, it is possible for the first time to optimally digest dry, powdery additives in the fine cement / fine binder, so that a reduction in the amounts of additives used is possible.
  • the device according to the invention has the further advantage that the storage container 1, for example at high Temperatures can be cooled or heated in summer if the suspension is processed in cool rock, to ensure optimal solidification in the rock.
  • the method and the device according to the invention make it possible to provide robust mixing units which are extremely simple and inexpensive to use for use on construction sites, without having to forego the high mixing requirements for fine cement suspensions and fine binders.

Abstract

Fine cement/fine binding agent suspensions are mfd. e.g. for filling cracks in cement by a method in which a quantity of water corresp. to a predetermined recipe is put in a storage container (1), from which it is pumped by a pump (2) to a mixer (3) operating according to the Venturi principle. The low pressure generated by the water flowing through the mixer draws fine cement/fine binding agent from a container (4) in to the flow to form a suspension, which passes to the storage container for recycling through the circuit, after stirring (5), at least once. When the required mixture has been produced, it is discharged (6). The storage container is equipped with heating or cooling device to maintain constant temp.

Description

Feinstzemente/Feinstbindemittel werden zunehmend in den Bereichen Betoninstandsetzung und Geotechnik eingesetzt. Dabei dienen die aus den Feinstzementen/Feinstbindemitteln hergestellten Zementsuspensionen zum Füllen von Rissen in Beton, Spalten und Klüften in Fels sowie Porenräumen in Lockergesteinen.Ultra-fine cements / ultra-fine binders are increasingly being used in the areas of concrete repair and geotechnical engineering. The cement suspensions made from the ultra-fine cements / ultra-fine binders are used to fill cracks in concrete, cracks and fissures in rock, and pore spaces in loose rock.

Feinstzemente sind sehr feinkörnige hydraulische Bindemittel mit stetig und eng abgestuften Kornverteilungen und einer Begrenzung des Größtkorns. Die Eigenschaften und die Verwendung von Feinstzementen ist geregelt, z.B. in einem vorläufigen Merkblatt für Einpressarbeiten mit Feinstbindemitteln in Lockergesteinen (Bautechnik 70, [1993], Heft 9, Ernst & Sohn, Seiten 550 bis 560, und ZTV-RISS 93, Verkehrblatt-Dokument B 5237, Verkehrsblatt-Verlag).Fine cements are very fine-grained hydraulic binders with steadily and closely graded particle size distributions and a limitation of the largest particle size. The properties and the use of fine cements are regulated, e.g. in a preliminary leaflet for press-fitting work with very fine binders in loose rock (Bautechnik 70, [1993], number 9, Ernst & Sohn, pages 550 to 560, and ZTV-RISS 93, Verkehrblatt document B 5237, Verkehrsblatt-Verlag).

Die Terminologie in den beiden bekannten Regelwerken ist nicht einheitlich. Im Merkblatt wird der Begriff "Feinstbindemittel" und in der ZTV-RISS der Begriff "Feinzement" verwendet. Die amerikanische Literatur spricht von mikrofeinen Portlandzementen (US-PS 5 106 423). Im folgenden wird hauptsächlich der Begriff "Feinstzement" verwendet, der auch in einschlägigen Fachberichten verwendet wird (Beton 1/94, Seiten 12 bis 16, Felsbau 11, [1993], Nummer 6, Sonderabdruck, Bauingenieur 67, [1992], Seiten 499 bis 504).The terminology in the two known sets of rules is not uniform. The term "ultra-fine binder" is used in the information sheet and the term "fine cement" is used in the ZTV-RISS. The American literature speaks of microfine Portland cements (US Pat. No. 5,106,423). In the following, the term "fine cement" is mainly used, which is also used in relevant technical reports (Beton 1/94, pages 12 to 16, Felsbau 11, [1993], number 6, Sonderabdruck, Bauingenieur 67, [1992], pages 499 to 504).

Nach den Vorschriften der Regelwerke soll der Feinstzement zur Herstellung von Zementsuspensionen einen Siebdurchgang von ≥ 95 % bei einer Maschenweite von 16 µm (0,016 mm) haben und mit geeigneten Zusatzstoffen und Zusatzmitteln hergestellt sein. Die Begriffe und Begriffsinhalte der Bestandteile Zusatzstoffe und Zusatzmittel sind im Zement-Merkblatt Nr. B 3, BBD/KA 1.93/20 definiert.According to the regulations of the regulations, the fine cement should Manufacture of cement suspensions have a sieve passage of ≥ 95% with a mesh size of 16 µm (0.016 mm) and are made with suitable additives. The terms and content of the ingredients additives and additives are defined in cement leaflet No. B 3, BBD / KA 1.93 / 20.

Die besondere Eignung von Feinstzementen/Feinstbindemitteln für die genannten Maßnahmen ist auf die hohe Feinheit bei gleichzeitig begrenztem Größtkorn der trockenen Bindemittel zurückzuführen. Maßgebend für die Eignung von Feinstzementen/Feinstbindemitteln ist jedoch darüberhinaus die Kornverteilung des Bindemittels in der Suspension. So können bei unzureichendem Aufschluß des Feinstzementes in Wasser Agglomerate entstehen bzw. verbleiben, die beispielsweise eine Injektion von Feinstzementsuspensionen in feinste Betonrisse ausschließt.The particular suitability of ultra-fine cements / ultra-fine binders for the measures mentioned can be attributed to the high fineness and, at the same time, the maximum size of the dry binder. However, the particle size distribution of the binder in the suspension is also decisive for the suitability of ultra-fine cements / ultra-fine binders. If the fine cement is insufficiently digested in water, agglomerates can form or remain, which, for example, precludes the injection of fine cement suspensions into the finest concrete cracks.

Auf die Notwendigkeit des ausreichenden Aufschließens von Feinstzementen/Feinstbindemitteln bei der Herstellung von Suspensionen wird in den einschlägigen Regelwerken (ZTV-RISS, Merkblatt Feinstbindemittel) ausdrücklich hingewiesen. Gemäß der Ausführungen im Feinstbindemittel-Merkblatt sind für einen optimalen Aufschluß der Feinstbindemittel ausschließlich Turbomischer oder andere Mischer mit hoher Intensität zu verwenden, da insbesondere bei der Mischtechnik höhere Anforderungen zu stellen sind. Als geeignete Geräte werden explizit angegeben: Turbomischer, Kreiselpumpen, Wirbelradpumpen.The relevant regulations (ZTV-RISS, leaflet on very fine binders) expressly point out the need to open up fine cements / binders sufficiently in the manufacture of suspensions. According to the information in the fine binder leaflet, only turbo mixers or other mixers with high intensity should be used for optimal disintegration of the fine binder, since higher demands are to be made especially in the mixing technology. Explicitly specified as suitable devices are: turbo mixers, centrifugal pumps, vortex pumps.

Aus einer Wiley-Interscience Publication "Construction and Design of Cement Grouting" ist es bekannt, einen nach dem Venturi-Prinzip arbeitenden Mischer zu verwenden, wobei der Zement in das Vakuum eingesaugt und anschließend mit dem Wasserstrahl vermischt wird. Hierbei wird jedoch angegeben, daß kein gutes Mischen erfolgt und die Steuerung des Verhältnisses Wasser:Zement sehr schwierig ist, da Wasser als kontinuierlicher Strahl zugeführt werden muß. Zudem sind solche Mischer als nicht für dicke Mischungen geeignet beschrieben.From a Wiley-Interscience publication "Construction and Design of Cement Grouting" it is known to use a mixer which works according to the Venturi principle, the cement being sucked into the vacuum and then mixed with the water jet. However, it is stated here that mixing does not take place well and it is very difficult to control the water: cement ratio since water has to be supplied as a continuous jet. In addition, such mixers are described as unsuitable for thick mixtures.

Aus der EP 0 498 279 ist eine Vorrichtung zum Aufbereiten und Verpressen einer Zementsuspension bekannt, die einen Aufbereitungsbereich und einen Verpreßbereich aufweist. Der Aufbereitungsbereich und der Verpreßbereich sind mit einer Verbindungsleitung miteinander verbunden und sie weisen jeweils einen Behälter, eine Kreislaufleitung und eine Pumpe auf, mit welcher die Zementsuspension zur Aufbereitung bzw. zum Verpressen zirkuliert werden kann. Diese Druckschrift lehrt, daß in der Kreislaufleitung des Aufbereitungsbereichs ein Sieb eingesetzt ist und die Behälter jeweils von einer von Kühlmittel durchflossenen Kühleinrichtung umgeben sind. Durch das Sieb soll eine Verklumpung unterbunden werden, da die Suspension mit relativ hohem Druck durch das Sieb gepreßt wird, wobei in der Suspension befindliche Klümpchen zerteilt werden.From EP 0 498 279 a device for processing and pressing a cement suspension is known which has a processing area and a pressing area. The preparation area and the pressing area are connected to one another by a connecting line and each have a container, a circuit line and a pump with which the cement suspension can be circulated for preparation or for pressing. This document teaches that a sieve is inserted in the circulation line of the processing area and the containers are each surrounded by a cooling device through which coolant flows. A clumping is to be prevented by the sieve, since the suspension is pressed through the sieve at relatively high pressure, lumps in the suspension being broken up.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zur Herstellung von Feinstzement-/Feinstbindemittelsuspensionen anzugeben, wobei keine Verklumpung des zu verarbeitenden Materials wie bei Verwendung hoch- oder niedertouriger Mischer auftritt und wobei für Feinstzement-Feinstbindemittel üblicherweise verwendete trockene, pulverförmige Zusatzmittel optimal aufgeschlossen werden, insgesamt daher eine völlig klumpenfreie Suspension erhalten wird.The invention is based on the object of specifying a method and a device for producing fine cement / fine binder suspensions, with no clumping of the material to be processed as when using high or low speed mixers and with dry powdery additives normally used for fine cement fine binders can be disrupted, overall a completely lump-free suspension is obtained.

Diese Aufgabe wird durch das in Anspruch 1 gekennzeichnete Verfahren und die in Anspruch 6 gekennzeichnete Vorrichtung gelöst. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.This object is achieved by the method characterized in claim 1 and the device characterized in claim 6. Advantageous developments of the invention are characterized in the subclaims.

Gegenstand der Erfindung ist daher ein Verfahren zur Aufbereitung von Feinstzement-/Feinstbindemittelsuspensionen, bei dem in einem geschlossenen Kreislauf zunächst in einen Vorratsbehälter 1 eine einer vorgegebenen Rezeptur entsprechende Wassermenge vorgelegt und über eine Pumpe 2 zu einem nach dem Venturi-Prinzip arbeitenden Mischer 3, wie eine Wasserstrahlpumpe, gepumpt wird, wobei der durch das den Mischer 3 durchströmende Wasser erzeugte Unterdruck Feinstzement/Feinstbindemittel aus einem am Mischer 3 angeordneten Behälter 4 unter Ausbildung eines suspensionsartigen Gemisches einsaugt und diese Suspension zum Vorratsbehälter 1 transportiert, wobei mit einer Rühreinrichtung 5 gerührt wird, und anschließend die Suspension mittels der Pumpe 2 mindestens einmal wieder dem Kreislauf zugeführt und nach Beendigung einer vorgegebenen Aufbereitung an einer Abnahmestelle 6 aus dem Kreislauf entnommen wird.The invention therefore relates to a process for the preparation of fine cement / fine binder suspensions, in which, in a closed circuit, a quantity of water corresponding to a predetermined recipe is initially introduced into a storage container 1 and is pumped to a mixer 3 working according to the Venturi principle, such as a water jet pump is pumped, the water flowing through the mixer 3 Vacuum generated fine cement / ultra-fine binder is sucked in from a container 4 arranged on the mixer 3 to form a suspension-like mixture and this suspension is transported to the storage container 1, stirring with a stirring device 5, and then the suspension is returned to the circuit at least once by means of the pump 2 and is removed from the circuit at a tapping point 6 after completion of a given preparation.

Mit diesem erfindungsgemäßen Verfahren kann anstatt eines reinen Feinstzement/Feinstbindemittels auch eine gleich feine Trockenmischung aus dem am Mischer 3 angeordneten Behälter 4 eingesaugt werden. Eine solche Trockenmischung ist in der Regel aus einem Feinstzement/Feinstbindemittel und einem oder mehreren Zusatzmittel bzw. Zusatzstoffen zusammengesetzt.With this method according to the invention, instead of a pure ultrafine cement / ultrafine binder, an equally fine dry mixture can also be sucked in from the container 4 arranged on the mixer 3. Such a dry mixture is usually composed of a fine cement / fine binder and one or more additives or additives.

Ein weiterer Gegenstand der Erfindung ist eine Vorrichtung zur Durchführung des oben genannten Verfahrens, gekennzeichnet durch einen Vorratsbehälter 1 für Wasser, gegebenenfalls Zusatzmittel für Feinstzement/Feinstbindemittel, oder für Feinstzement-/Feinstbindemittelsuspensionen, eine Transportleitung 7a vom Vorratsbehälter 1 zu einer dem Vorratsbehälter 1 nachgeschalteten Pumpe 2, eine weitere Transportleitung 7b von der Pumpe 2 zu einem nach dem Venturi-Prinzip arbeitenden Mischer 3, wie eine Wasserstrahlpumpe, an dem ein Behälter 4 für die Zugabe von Feinstzement/Feinstbindemittel bzw. von gleich feinen Trockenmischungen vorgesehen ist, eine weitere Transportleitung 7c von dem Mischer 3 zu dem Vorratsbehälter 1, und durch eine mit der Pumpe 2 über eine Transportleitung 7d in Verbindung stehende Abnahmestelle 6, wobei die Anordnung von Vorratsbehälter 1, Pumpe 2 und Mischer 3 derart ist, daß diese über die Transportleitungen 7 cyclisch hintereinander geschaltet sind.Another object of the invention is a device for carrying out the above-mentioned method, characterized by a storage container 1 for water, optionally additives for fine cement / fine binder or for fine cement / fine binder suspensions, a transport line 7a from the storage container 1 to a pump connected downstream of the storage container 1 2, a further transport line 7b from the pump 2 to a mixer 3 operating according to the Venturi principle, such as a water jet pump, to which a container 4 is provided for the addition of fine cement / fine binder or of equally fine dry mixtures, a further transport line 7c from the mixer 3 to the storage container 1, and through a removal point 6 connected to the pump 2 via a transport line 7d, the arrangement of the storage container 1, pump 2 and mixer 3 being such that these are cyclically connected in series via the transport lines 7 are.

Im folgenden wird die Erfindung anhand einer Zeichnung näher erläutert, in der zeigt:

Fig. 1
eine erfindungsgemäße Vorrichtung zur Durchführung des Verfahrens zum Herstellen von Feinstzement-/Feinstbindemittelsuspensionen.
The invention is explained in more detail below with reference to a drawing, in which:
Fig. 1
a device according to the invention for performing the method for producing fine cement / fine binder suspensions.

Die in Fig. 1 gezeigte Vorrichtung zur Herstellung von Feinstzement-/Feinstbindemittelsuspensionen umfaßt einen mit einem Rührwerk 5 versehenen Vorratsbehälter 1, der mit Wasser und gegebenenfalls mit für Feinstzement/Feinstbindemittel üblichen Zusatzstoffen und/oder Zusatzmitteln beschickt werden kann. Transportleitungen 7a und 7b führen vom Vorratsbehälter 1 zur Pumpe 2 und weiter zu einem nach dem Venturi-Prinzip arbeitenden Mischer 3, wie eine Wasserstrahlpumpe, der mit einem Behälter 4 ausgerüstet ist, über den die Zugabe von Feinstzement/Feinstbindemittel bzw. gleich feiner Trockenmischungen erfolgt. Durch den im Mischer 3 erzeugten Unterdruck wird der Feinstzement/das Feinstbindemittel bzw. die Trockenmischung aus dem Behälter 4 in das den Mischer 3 durchströmende Wasser unter Ausbildung eines suspensionsartigen Gemisches eingesaugt und über die Transportleitung 7c wieder zum Vorratsbehälter 1 transportiert. Die Suspension kann nun mittels der Pumpe 2 aus dem Vorratsbehälter 1 erneut mindestens einmal zum Mischer 3 gepumpt und mit weiterem Feinstzement/Feinstbindemittel gemischt werden und wird anschließend wieder zum Vorratsbehälter 1 zurückgepumpt, wobei dieser Vorgang auch mehrfach wiederholbar ist, bis ein gewünschtes Wasser:Zement-Verhältnis eingestellt ist und die Zusatzmittel in der Suspension optimal verteilt und aufgeschlossen sind.The device shown in FIG. 1 for the production of fine cement / fine binder suspensions comprises a storage container 1 provided with an agitator 5, which can be charged with water and optionally with additives and / or additives customary for fine cement / fine binder. Transport lines 7a and 7b lead from the storage container 1 to the pump 2 and further to a mixer 3 which works according to the Venturi principle, such as a water jet pump, which is equipped with a container 4, via which the addition of fine cement / fine binder or equally fine dry mixtures takes place . Due to the negative pressure generated in the mixer 3, the ultrafine cement / ultrafine binder or the dry mixture is sucked out of the container 4 into the water flowing through the mixer 3 to form a suspension-like mixture and transported back to the reservoir 1 via the transport line 7c. The suspension can now be pumped from the storage container 1 again to the mixer 3 at least once by means of the pump 2 and mixed with further fine cement / ultrafine binder and is then pumped back again to the storage container 1, this process also being able to be repeated several times until a desired water: cement - Ratio is set and the additives are optimally distributed and open in the suspension.

Um optimale Verfestigungsbedingungen für die derart hergestellte Feinstzement-/Feinstbindemittelsuspension beispielsweise beim Füllen von Rissen oder Spalten und Klüften im Fels zu erzielen, ist gemäß einer vorteilhaften Ausgestaltung in Abhängigkeit von der Außentemperatur der Vorratsbehälter (1) mittels einer Heiz- oder Kühleinrichtung heiz- oder kühlbar, so daß die Feinstzement-/Feinstbindemittelsuspension auf einen exakten optimalen Temperaturbereich einstellbar ist.In order to achieve optimal consolidation conditions for the fine cement / fine binder suspension produced in this way, for example when filling cracks or crevices and fissures in the rock, the storage container (1) can be heated or cooled by means of a heating or cooling device depending on the outside temperature , so that the fine cement / fine binder suspension is adjustable to an exact optimal temperature range.

Durch die mindestens ein- oder mehrmalige Führung der Suspension im Kreislauf ist es möglich, trockene, pulverförmige Zusatzmittel im Feinstzement/Feinstbindemittel erstmals optimal aufzuschließen, so daß eine Reduzierung der verwendeten Zusatzmittelmengen möglich ist.Because the suspension is circulated at least once or several times, it is possible for the first time to optimally digest dry, powdery additives in the fine cement / fine binder, so that a reduction in the amounts of additives used is possible.

Durch die getrennte Zuführung von Wasser/gegebenenfalls Zusatzstoffen/Zusatzmitteln in den Vorratsbehälter 1 und von Feinstzement/Feinstbindemittel in den Mischer 3 und das im Mischer 3 erfolgende schnelle Vermischen der Bestandteile wird eine Verklumpung in der Suspension vermieden, wobei insbesondere durch den Einsatz des nach dem Venturi-Prinzips arbeitenden Mischers 3, wie einer Wasserstrahlpumpe, im Vergleich zu mechanisch arbeitenden hochtourigen oder niedertourigen Mischern die Zufuhr zusätzlicher Reibungswärme in das Mischungssystem vermieden wird und das Gemisch auch keinerlei Temperaturerhöhung durch den Pumpenbetrieb erfährt, da der Motorblock vom Beförderungsaggregat der Pumpe getrennt ist. Auf diese Weise läßt sich die Aufbereitung der Feinstzement-/Feinstbindemittelsuspension bei weitgehend konstanter Temperatur durchführen.Due to the separate supply of water / optional additives / additives in the storage container 1 and fine cement / fine binder in the mixer 3 and the rapid mixing of the components in the mixer 3, clumping in the suspension is avoided, in particular by using the after Venturi principle of working mixer 3, such as a water jet pump, in comparison to mechanically working high-speed or low-speed mixers, the supply of additional frictional heat to the mixing system is avoided and the mixture does not experience any temperature increase as a result of the pump operation, since the engine block is separated from the delivery unit of the pump. In this way, the processing of the fine cement / fine binder suspension can be carried out at a largely constant temperature.

Die erfindungsgemäße Vorrichtung besitzt neben der einfachen und schnellen Herstellung klumpenfreier Suspensionen mit gutem Aufschluß der darin enthaltenen Zusatzmittel noch den weiteren Vorteil, daß der Vorratsbehälter 1 beispielsweise bei hohen Temperaturen im Sommer gekühlt oder beheizt werden kann, wenn die Suspension im kühlen Fels verarbeitet wird, uni eine optimale Verfestigung im Fels zu gewährleisten.In addition to the simple and rapid production of lump-free suspensions with good digestion of the additives contained therein, the device according to the invention has the further advantage that the storage container 1, for example at high Temperatures can be cooled or heated in summer if the suspension is processed in cool rock, to ensure optimal solidification in the rock.

Durch das erfindungsgemäße Verfahren und die erfindungsgemäße Vorrichtung ist es möglich, robuste, in ihrer Handhabung äußerst einfache und kostengünstige Mischaggregate für die baustellengerechte Anwendung bereitzustellen, ohne auf die hohen mischtechnischen Anforderungen an Feinstzementsuspensionen und Feinstbindemitteln zu verzichten.The method and the device according to the invention make it possible to provide robust mixing units which are extremely simple and inexpensive to use for use on construction sites, without having to forego the high mixing requirements for fine cement suspensions and fine binders.

Claims (7)

Verfahren zur Herstellung von Feinstzement-/Feinstbindemittelsuspensionen, bei dem in einem geschlossenen Kreislauf zunächst in einen Vorratsbehälter (1) eine einer vorgegebenen Rezeptur entsprechende Wassermenge vorgelegt und über eine Pumpe (2) zu einem nach dem Venturi-Prinzip arbeitenden Mischer (3) gepumpt wird, wobei der durch das den Mischer (3) durchströmende Wasser erzeugte Unterdruck Feinstzement/Feinstbindemittel bzw. eine gleich feine Trockenmischung aus einem am Mischer (3) angeordneten Behälter (4) unter Ausbildung eines suspensionsartigen Gemisches einsaugt und diese Suspension zum Vorratsbehälter (1) transportiert, wobei mit einer Rühreinrichtung (5) gerührt wird, und anschließend die Suspension mittels der Pumpe (2) mindestens einmal wieder dem Kreislauf zugeführt wird und nach Beendigung einer vorgegebenen Aufbereitung an einer Abnahmestelle (6) aus dem Kreislauf entnommen wird.Process for the production of fine cement / fine binder suspensions, in which, in a closed circuit, a quantity of water corresponding to a predetermined recipe is initially placed in a storage container (1) and pumped via a pump (2) to a mixer (3) working according to the Venturi principle , whereby the vacuum generated by the water flowing through the mixer (3) sucks fine cement / ultra-fine binder or an equally fine dry mixture from a container (4) arranged on the mixer (3) to form a suspension-like mixture and transports this suspension to the storage container (1) , with stirring using a stirring device (5), and then the suspension is returned to the circuit at least once by means of the pump (2) and is removed from the circuit at a take-off point (6) after completion of a predetermined preparation. Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß während des Kreislaufs weiterhin Feinstzement/Feinstbindemittel zugegeben wird.Method according to claim 1,
characterized,
that ultra-fine cement / ultra-fine binder is added during the cycle. Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß dem Vorratsbehälter (1) für Feinstzement/Feinstbindemittel übliche Zusatzstoffe und/oder Zusatzmittel zugegeben werden.The method of claim 1 or 2,
characterized,
that usual additives and / or additives are added to the storage container (1) for fine cement / fine binder. Verfahren nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß die Herstellung bei weitgehend konstanter Temperatur erfolgt.Method according to one of claims 1 to 3,
characterized,
that the production takes place at a largely constant temperature. Verfahren nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß der Vorratsbehälter (1) beheizt oder gekühlt wird.Method according to one of claims 1 to 4,
characterized,
that the storage container (1) is heated or cooled. Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 4,
gekennzeichnet durch
einen Vorratsbehälter (1) für Wasser, gegebenenfalls Zusatzstoffe und/oder Zusatzmittel für Feinstzement/Feinstbindemittel, oder für Feinstzement-/Feinstbindemittelsuspensionen, eine Transportleitung (7a) vom Vorratsbehälter zu einer dem Vorratsbehälter nachgeschalteten Pumpe (2), eine weitere Transportleitung (7b) von der Pumpe (2) zu einem nach dem Venturi-Prinzip arbeitenden Mischer (3), an dem ein Behälter (4) für die Zugabe von Feinstzement/Feinstbindemittel bzw. für die Zugabe einer gleich feinen Trockenmischung vorgesehen ist, eine weitere Transportleitung (7c) von dem Mischer (3) zu dem Vorratsbehälter (1) und durch eine mit der Pumpe (2) über eine Transportleitung (7d) in Verbindung stehende Abnahmestelle (6), wobei die Anordnung von Vorratsbehälter (1), Pumpe (2) und Mischer (3) derart ist, daß diese über die Transportleitungen (7a, 7b, 7c) cyclisch hintereinander geschaltet sind.Device for carrying out the method according to one of claims 1 to 4,
marked by
a storage container (1) for water, possibly additives and / or additives for fine cement / fine binder or for fine cement / fine binder suspensions, a transport line (7a) from the storage container to a pump (2) downstream of the storage container, a further transport line (7b) from the pump (2) to a mixer (3) working according to the Venturi principle, on which a container (4) for the addition of fine cement / fine binder or for the addition of an equally fine dry mixture is provided, a further transport line (7c) from the mixer (3) to the storage container (1) and through a removal point (6) connected to the pump (2) via a transport line (7d), the arrangement of the storage container (1), pump (2) and mixer (3) is such that these are cyclically connected in series via the transport lines (7a, 7b, 7c). Vorrichtung nach Anspruch 6,
dadurch gekennzeichnet,
daß der Vorratsbehälter (1) mit einer Heiz- oder Kühleinrichtung ausgerüstet ist.Apparatus according to claim 6,
characterized,
that the storage container (1) is equipped with a heating or cooling device.
EP96114901A 1995-10-11 1996-09-17 Process for manufacturing fine cement/ultrafine binder suspensions Expired - Lifetime EP0768113B1 (en)

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DE19537874A DE19537874C2 (en) 1995-10-11 1995-10-11 Process and device for the production of fine cement / fine binder suspensions
DE19537874 1995-10-11

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AT (1) ATE235953T1 (en)
CZ (1) CZ290796A3 (en)
DE (2) DE19537874C2 (en)
ES (1) ES2107986T1 (en)
HU (1) HUP9602643A3 (en)
NO (1) NO307550B1 (en)
PL (1) PL184282B1 (en)
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WO2005000454A1 (en) * 2003-06-27 2005-01-06 Mmd Design & Consultancy Limited Apparatus and method for mixing particulate material with a fluid to form a pumpable slurry
WO2012076675A3 (en) * 2010-12-09 2012-08-09 Akzo Nobel Coatings International B.V. An assembly for the production of dispersions
WO2013160562A1 (en) 2012-04-27 2013-10-31 S.T. Ritvanen Oy Method for finely feeding granular solids into liquid
CN111173286A (en) * 2020-03-02 2020-05-19 广东博智林机器人有限公司 Feeding device and grooving robot
CN112430857A (en) * 2020-11-25 2021-03-02 浙江炜烨晶体纤维有限公司 Pressure cooker for polycrystalline mullite fiber spinning

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DE10037118A1 (en) * 2000-07-28 2002-02-14 Univ Clausthal Tech Process for producing a swelling cement and associated test device
EP1745840A1 (en) * 2005-07-22 2007-01-24 Services Petroliers Schlumberger Apparatus and method for mixing a liquid material and a flowable powdery material to obtain a slurry
DE102011119816B4 (en) * 2011-12-01 2015-08-27 Sartorius Stedim Biotech Gmbh System and method for cell separation

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Publication number Priority date Publication date Assignee Title
WO2001062441A1 (en) * 2000-02-25 2001-08-30 Infineon Technologies Ag Mixing device and mixing method
WO2005000454A1 (en) * 2003-06-27 2005-01-06 Mmd Design & Consultancy Limited Apparatus and method for mixing particulate material with a fluid to form a pumpable slurry
WO2012076675A3 (en) * 2010-12-09 2012-08-09 Akzo Nobel Coatings International B.V. An assembly for the production of dispersions
US9409133B2 (en) 2010-12-09 2016-08-09 Akzo Nobel Coatings International B.V. Assembly for the production of dispersions
WO2013160562A1 (en) 2012-04-27 2013-10-31 S.T. Ritvanen Oy Method for finely feeding granular solids into liquid
US10010836B2 (en) 2012-04-27 2018-07-03 S. T. Ritvanen OY Method for finely feeding granular solids into liquid
CN111173286A (en) * 2020-03-02 2020-05-19 广东博智林机器人有限公司 Feeding device and grooving robot
CN112430857A (en) * 2020-11-25 2021-03-02 浙江炜烨晶体纤维有限公司 Pressure cooker for polycrystalline mullite fiber spinning

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Publication number Publication date
EP0768113B1 (en) 2003-04-02
DE59610293D1 (en) 2003-05-08
NO963801D0 (en) 1996-09-11
PL316464A1 (en) 1997-04-14
PL184282B1 (en) 2002-09-30
DE19537874C2 (en) 1997-10-23
HUP9602643A2 (en) 1999-04-28
HUP9602643A3 (en) 1999-05-28
HU9602643D0 (en) 1996-11-28
ATE235953T1 (en) 2003-04-15
ES2107986T1 (en) 1997-12-16
DE19537874A1 (en) 1997-04-17
NO963801L (en) 1997-04-14
CZ290796A3 (en) 1997-04-16
NO307550B1 (en) 2000-04-25
SI9600291A (en) 1997-08-31
SK127396A3 (en) 1997-08-06

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