EP0192234B1 - Procédé de mélange pour la fabrication de béton et/ou de mortier et dispositif pour la réalisation du procédé - Google Patents

Procédé de mélange pour la fabrication de béton et/ou de mortier et dispositif pour la réalisation du procédé Download PDF

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Publication number
EP0192234B1
EP0192234B1 EP19860102060 EP86102060A EP0192234B1 EP 0192234 B1 EP0192234 B1 EP 0192234B1 EP 19860102060 EP19860102060 EP 19860102060 EP 86102060 A EP86102060 A EP 86102060A EP 0192234 B1 EP0192234 B1 EP 0192234B1
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EP
European Patent Office
Prior art keywords
mixing
additives
binder
mixer
belt conveyor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19860102060
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German (de)
English (en)
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EP0192234A2 (fr
EP0192234A3 (en
Inventor
Karl Bernegger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BHS Bayerische Berg Hutten und Salzwerke AG
Original Assignee
BHS Bayerische Berg Hutten und Salzwerke AG
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Application filed by BHS Bayerische Berg Hutten und Salzwerke AG filed Critical BHS Bayerische Berg Hutten und Salzwerke AG
Publication of EP0192234A2 publication Critical patent/EP0192234A2/fr
Publication of EP0192234A3 publication Critical patent/EP0192234A3/de
Application granted granted Critical
Publication of EP0192234B1 publication Critical patent/EP0192234B1/fr
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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
    • B28C9/00—General arrangement or layout of plant
    • B28C9/04—General arrangement or layout of plant the plant being mobile, e.g. mounted on a carriage or a set of carriages
    • B28C9/0454—Self-contained units, i.e. mobile plants having storage containers for the ingredients

Definitions

  • the invention relates to a method for mixing fractional mineral additives, hydraulic binders and optionally polymeric additives with mixing water to concrete and / or mortar, preferably for use in mobile mixing systems, in which the pre-metered additives and the Binder and the pre-metered mixing water, optionally with polymer additives, are introduced into the interior of the mixing device and the mixture is discharged after mixing through an opening in the mixing trough.
  • the aggregates and the binding agent are metered out of the storage containers in a quantity-controlled manner and fed to a premixer with a belt conveyor belt.
  • Another conveyor brings the premixing into the weighing container of a batch scale, from which the entire batch is fed into the mixer trough.
  • the premixing is necessary in particular because otherwise the homogenization of the batch, which is given up as a whole, would take too much time.
  • the weighing container of the batch scale also serves as a buffer container so that the mixer can be quickly refilled after the mixer has been emptied. After adding the pre-metered amount of mixing water and the mixture, the mix is removed as quickly as possible so that the mixer is free for the next batch.
  • GB-A-986 884 discloses a method of the type mentioned at the outset and an apparatus for carrying out this method, in which the respective mineral additives, hydraulic binders and, if appropriate, polymeric additives are accommodated in individual silos above a conveyor belt.
  • a single silo for example a silo for a mineral aggregate, is opened so that a desired amount of the substance falls onto the conveyor belt and can be transported to a transport container by means of this conveyor belt.
  • the silos of the other constituents of the mixture are opened one after the other and the quantities removed therefrom are conveyed to the transport container by the conveyor belt until the desired mixture has been compiled.
  • the transport container is then brought to a mixer in which the mixture is mixed.
  • operation is therefore carried out batchwise, the problems described at the outset occurring.
  • the throughput rate in this method is relatively low.
  • the above object is achieved in a mixing process of the type mentioned above in that the additives and the binder are continuously added to the belt conveyor in layers one above the other, and that the discharge is also continuous it is done that the throughput per minute is between 40% and 400%, preferably between 80% and 200%, of the average mixer filling quantity and that the mixer contents are subjected to a compulsory mixing treatment and a vibration at the same time.
  • the proposed method makes it possible, even in the area of the belt conveyor, to assign the individual mixing components in terms of quantity in accordance with the mixing ratio.
  • the mixing effort is reduced accordingly, the mixing time can be reduced and the system volume can be reduced.
  • the invention also relates to a device for mixing fractional, mineral additives, hydraulic binders and possibly polymeric additives with mixing water for concrete and / or mortar, comprising a mixing device with a belt conveyor belt for continuously feeding the mixing device and a discharge device, with storage containers for the additives and storage containers for the binder and, if appropriate, for the additives are connected to the belt conveyor belt in succession by means of metering devices, a quantity control for the supply of the additives, the binder and possibly the polymeric additives being provided to the mixing device, and wherein a metering device for the Mixing water is provided.
  • Fig. 1 shows a side view of a mobile mixing plant for performing the method according to the invention in a schematic representation.
  • Fig. 2 shows a cross section through a two-shaft compulsory mixer, which is set up to carry out the method according to the invention, in a schematic representation.
  • a semi-trailer 1 is shown, which can be placed with its front end for transport on a semi-trailer 2.
  • the frame structure 3 of the semitrailer 1 can be supported for operation with protectors 4a, 4b and 4c.
  • Storage containers 5a, 5b and 5c for the additives are built up in the rear part of the semitrailer 1.
  • Dosing devices 6a, 6b and 6c are arranged below the storage containers 5a, 5b and 5c, which for example consist of belt scales can exist.
  • a weighing container 7a is attached under a storage container 7 for a binding agent, from which the binding agent is fed onto a belt conveyor belt 10 with a binding agent metering device 8 in accordance with the set mixing ratio.
  • the belt conveyor belt 10 runs underneath the storage containers 5a, 5b, 5c, 7 and takes up the metered additives and the binding agent, which are layered one above the other in accordance with the position of the individual storage containers 5a, 5b, 5c, 7.
  • the belt conveyor belt 10 rises to a mixing device 9 which is arranged on the frame construction 3 at the front end of the semitrailer 1.
  • a continuously operating transport device 11 for example a belt conveyor belt or a concrete pump, is used to remove the mixed material.
  • the mixing water is metered out of a metering device 14 into the mixing device or into the mixer.
  • the feeding of the mixing device and the discharge take place continuously, the throughput per minute being between 40% and 400%, preferably between 80% and 200% of the average mixer filling quantity.
  • the metering of the starting material therefore does not have to be carried out in batches limited to the capacity of the mixer, but rather an entire removal unit, for example the loading quantity of one or more transport vehicles, can be preselected.
  • the binder is filled from the storage container 7 into the weighing container 75 and from there added to the additives passing through on the belt conveyor belt 10.
  • the quantities of the individual components are coordinated with one another by a regulating and control unit (not shown).
  • the ratio according to the invention of the throughput per minute to the mixer filling quantity ensures that the continuously added raw materials which have not yet been mixed only make up a relatively small part of the total mixer content, its homogeneity little is disturbed by the addition. Any fluctuations in the composition of the primary material, which could not be corrected by the regulating and control device, are distributed over the entire mixer content and thereby largely offset each other.
  • the ratio of the throughput to the mixer content controls the average residence time of the material to be mixed in a mixer trough of the mixing device and thus the intensity of the mixing. For example, if the mixer content is 1.67 cubic meters and the throughput per minute is 100% of the mixer content, the average residence time of the material to be mixed in the mixer trough is 1 minute and the average mixer output per hour is 100 cubic meters. With a conventional batch mixer of the same size, due to the waiting times for filling and emptying, only a much lower output could be achieved, although the mixing times are usually shorter.
  • Another advantage of continuous feeding is the addition of the mixing water and any polymeric additives. Since in the previously known processes the entire amount is filled as quickly as possible, the mixing water added at the same time or afterwards is very unevenly distributed at the start of the mixing. In the method according to the invention, it can be sprayed directly into the incoming primary material in a controlled manner and can be distributed very evenly from the start.
  • the vibrators can be inserted, for example, near the floor into the interior of the mixing trough.
  • the discharge opening for the mix can either be located in the side walls of the mixer trough near the ground or directly in the ground and can be provided with a controllable closing device.
  • Another advantage of the method according to the invention also results from the possibility of continuous discharge. Since batch mixers are only emptied batch-wise, it is not possible to remove the mix directly with a continuously operating funding. If, for example, the mix is to be drawn off with a frequently used concrete pump, it is necessary to interpose a buffer tank that can hold the entire mixer content. The additional space requirement and the foundations cause considerable difficulties, particularly for mobile mixing plants.
  • the method according to the invention enables the mixed material to be transported continuously, for example directly to the Processing point.
  • a particularly advantageous embodiment of the method consists in that, according to claim 2, a double-shaft compulsory mixer with horizontally arranged mixer shafts and in the overlapping region of the mixer arms raised bottom of the mixer trough is used as a mixing device in a manner known per se, the raised bottom region of the mixer trough at least partially as a vibrator formed and the discharge opening is arranged in the overlap area of the mixer arms near the ground or in the ground.
  • This embodiment is shown schematically in FIG. 2.
  • the mixer trough consists of two sections 21a and 21b, the inner contour of which is adapted to the path of the mixer arms 22a and 22b, which are driven by two horizontally arranged mixer shafts 28a and 28b. It rests on a frame 27 and is fed through the filling funnel 23.
  • the wall of the mixer trough is at least partially recessed in the area of the elevation and replaced by an inserted vibrator 24, which either extends over the entire length of the mixer trough or only over a partial area.
  • an elastomeric sealing sheet 26 for example a rubber plate, is placed over the vibrator 24 and overlapping over the edge of the mixing trough and optionally fastened. The sealing can also be done with other aids without affecting the essence of the invention.
  • the discharge opening 25 can either be provided, as shown, in the overlap area of the mixer arms 22a, 22b in the end wall of the mixer trough or also directly in the floor if the vibrator 24 does not extend over the entire length of the mixer trough.
  • the mixer trough is always in operation filled with mixed material up to a certain filling level, into which the metered primary material continuously introduced by the filling funnel 23 is stirred by the mixer arms 22a, 22b.
  • the required amount of mixing water is metered in by means of a device (not shown), optionally with polymeric additives, which can take place directly into the incoming raw material and thus result in a very uniform distribution.
  • the vibration excitation of the mixed material by the vibrator 24 significantly improves the miscibility, increases the homogeneity of the discharged mixed material and thus ensures constant strength properties of the structures produced.
  • the mixing principle of the double-shaft compulsory mixer is particularly well suited for using the method according to the invention.
  • the process-specific distribution of the continuously supplied primary material in the mixer contents up to the likewise continuous removal in the overlap region of the mixer arms 22a, 22b leads to a particularly good homogenization of the mixture.
  • the pre-metered additives and the binder are premixed transversely to the transport direction by an additional curvature of the belt conveyor belt 10 in the area of the binder metering device.
  • Belt conveyor belts are usually guided by support rollers so that they are more or less trough-shaped curved transversely to the transport direction. The smaller the transverse curvature, the more evenly the cargo is distributed over the belt width.
  • it is proposed to increase the transverse curvature in the area of the binder metering device. This means that in the marginal areas of the Conveyor belt lying aggregates poured towards the center of the belt and mix with the binder added in this area.
  • the rearrangement of the aggregates on the belt conveyor belt 10 therefore results in premixing with the simultaneous metering in of the binder and enables a reduction in the residence time of the material to be mixed in the mixer trough with the same mixing quality.
  • a mixer with a smaller content and a lower drive power can be used with the same mixing power. In addition to other advantages, this reduces the start-up time at the start and the after-run time at the end of a mixing process.
  • a device for carrying out the method according to the invention in a mobile mixing system in accordance with claim 5 in a compact design on a semitrailer 1 of a semitrailer 2 provided with protector devices 4a, 4b, 4c, the mixing device 9 on the side facing the semitrailer tractor 2 of the semitrailer 1. Since several space-consuming system parts, such as a pre-mixer, a batch weigher with a buffer tank and a buffer tank are not required for the mixture discharged from the mixer, and a smaller mixer can be used with the same output, in comparison with the previously known methods, and a smaller mixer can be used better for a compact design.
  • a further advantageous embodiment of the device according to the invention consists in that, according to claim 6, the storage container 7 for the binder from a vertical position of use in front of the storage containers 5a, 5b and 5c for the additives in a substantially horizontal transport position inside and above the storage container 5a, 5b and 5c for the aggregates can be folded down. To do this, it is only necessary to at least partially fold over, pivot out or otherwise remove the intermediate walls 13a, 13b and 13c between the storage containers 5a, 5b, 5c and to make the support frame for the storage container 7 foldable about an axis of rotation 12.
  • the folding can take place, for example, with an attached cable pull or with a hydraulic device without additional aids, for example a crane, having to be carried along.
  • the transport height of the device according to the invention can be kept so low that it is also possible to drive onto lower underpasses without an additional vehicle having to transport system parts.
  • the belt conveyor belt 10 is designed as a tubular belt conveyor belt for feeding the mixer, at least in some areas.
  • the transverse curvature of the belt is increased in a known manner by a suitable arrangement of the support rollers so that a tube forms from the open conveyor belt by overlapping.
  • the method according to the invention thus enables the construction of mixing plants which are quite suitable for large construction sites in terms of their performance, but because of their compactness, short set-up times and great mobility, they can also be used economically in smaller construction projects.

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  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Claims (7)

  1. Procédé destiné au mélange de fondants minéraux fractionnés, de liants hydrauliques et d'additifs polymères éventuellement, avec eau de gâchage pour obtenir du béton et/ou des mortiers, utilisé de préférence dans des mélangeurs mobiles, dans lequel les fondants prédosés, le liant ainsi que l'eau de gâchage prédosée plus éventuellement des additifs polymères sont introduits à l'intérieur du mélangeur à l'aide d'un transporteur à bande souple, le mélange une fois réalisé s'évacuant par une ouverture du bac-mélangeur, caractérisé en ce que les fondants et le liant sont déposés sur le transporteur à bande de façon continue et en couches successives, que l'évacuation se fait de manière continue, que le débit par minute se situe entre 40 et 400% de préférence entre 80 et 200 % du volume de remplissage moyen du mélangeur et que le contenu du mélangeur est soumis en même temps à un mélange forcé et à une vibration.
  2. Procédé selon la revendication 1, caractérisé par l'utilisation d'un malaxeur à mélange forcé à deux arbres avec vibrateur dans sa partie inférieure.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le transporteur à bande présente une courbure de forme tubulaire au niveau de l'alimentation en liants.
  4. Dispositif destiné au mélange de fondants minéraux fractionnés, de liants hydrauliques et d'additifs polymères éventuellement, avec eau de gâchage pour obtenir du béton et/ou des mortiers, comprenant un mélangeur équipé d'un transporteur à bande souple destiné au chargement continu du mélangeur ainsi qu'un dispositif d'évacuation, les réservoirs de stockage des fondants (5a, 5b et 5c), le réservoir (7) de stockage du liant et éventuellement des additifs étant reliés successivement au transporteur à bande par l'intermédiaire des doseurs (6a, 6b, 6c, 7a et 8), une commande de débit étant prévue pour l'alimentation du mélangeur (9) en fondants, liant et évt. en additifs polymères, un doseur (14) étant prévu pour l'eau de gâchage, caractérisé en ce que des doseurs régulateurs de débit (6a, 6b, 6c,7a et 8) sont prévus à la sortie de chacun des réservoirs de stockage (5a,5b, 5c et 7) juste avant que ceux-ci ne débouchent sur le transporteur (10), que ces doseurs (6a, 6b, 6c, 7a et 8) sont réglés de sorte qu'ils déposent les fondants sur le transporteur de façon continue et en couches superposées, que le dispositif d'évacuation (11) permet d'extraire de façon continue le mélange du mélangeur (9) et qu'un dispositif mélangeur et au moins un vibrateur placé au niveau du sol du mélangeur permettent le mélange du contenu du mélangeur.
  5. Dispositif selon la revendication 4, constitué par un ensemble mélangeur compact, caractérisé en ce qu'il est disposé sur la semi-remorque (1) d'un tracteur équipée de bequilles (4a, 4b, 4c), le mélangeur (9) reposant sur le côté de la semi-remorque tourné vers le tracteur (2).
  6. Dispositif selon la revend ication 5, caractérisé en ce que le réservoir de stockage (7) du liant se trouve en position verticale devant les réservoirs de fondants (5a, 5b et 5c) lors de l'utilisation et bascule en position horizontale dans la partie supérieure des réservoirs à fondants (5a, 5b et 5c) pour le transport.
  7. Dispositif selon l'une des revendications 4 à 6, caractérisé en ce que le transporteur à bande souple destiné au chargement du mélangeur (9) présente une forme tubulaire du moins partiellement.
EP19860102060 1985-02-18 1986-02-18 Procédé de mélange pour la fabrication de béton et/ou de mortier et dispositif pour la réalisation du procédé Expired - Lifetime EP0192234B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT45585 1985-02-18
AT455/85 1985-02-18

Publications (3)

Publication Number Publication Date
EP0192234A2 EP0192234A2 (fr) 1986-08-27
EP0192234A3 EP0192234A3 (en) 1987-01-28
EP0192234B1 true EP0192234B1 (fr) 1991-05-15

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EP19860102060 Expired - Lifetime EP0192234B1 (fr) 1985-02-18 1986-02-18 Procédé de mélange pour la fabrication de béton et/ou de mortier et dispositif pour la réalisation du procédé

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EP (1) EP0192234B1 (fr)
DE (1) DE3679212D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103407357A (zh) * 2013-07-19 2013-11-27 北汽福田汽车股份有限公司 车载式混凝土泵车

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62201625A (ja) * 1986-02-28 1987-09-05 Chichibu Eng Kk 振動式２軸強制練りミキサ
GB9100601D0 (en) * 1991-01-11 1991-02-27 Darvil Lawrence S Improvements in or relating to cement mixing
WO1996023639A1 (fr) * 1995-01-30 1996-08-08 Yvon Cloutier Usine a beton mobile
GR1005442B (el) * 2006-03-14 2007-02-15 Τεκ Ε.Π.Ε. Επικαθημενο συγκροτημα παραγωγης νωπου σκυροδεματος διαφορετικων συνθεσεων
CN101700679B (zh) * 2009-10-09 2012-04-25 邵克文 矿用混凝土搅拌充填泵车
AT521654A1 (de) * 2018-08-22 2020-03-15 Htk Huettmannsberger Consulting Gmbh Mischanlage zur Herstellung einer Baumischung aus einem Bindemittel, einem Schüttmaterial und einer wässrigen Flüssigkeit

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Publication number Priority date Publication date Assignee Title
US2365897A (en) * 1943-09-11 1944-12-26 Milton F Morgan Vibrating mill
DE1235614B (de) * 1960-04-09 1967-03-02 Arbau Baugeraete G M B H Waegevorrichtung zum Dosieren mehrerer Komponenten einer Charge, insbesondere fuer die Zubereitung von Beton, mit einem auf der Waegevorrichtung abgestuetzten Foerderband, auf welches die Komponenten nacheinander aufgegeben werden
US3888468A (en) * 1974-02-26 1975-06-10 Koehring Co Mobile concrete batch plant and dual shiftable mobile mixers therefor
US3945619A (en) * 1975-03-03 1976-03-23 Taibi Frank P Mobile continuous concrete proportioning plant
US3986708A (en) * 1975-06-23 1976-10-19 Heltzel Company Mobile batching plant
FR2392713A1 (fr) * 1977-05-31 1978-12-29 Cambier Francois Perfectionnements aux melangeurs a grave

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103407357A (zh) * 2013-07-19 2013-11-27 北汽福田汽车股份有限公司 车载式混凝土泵车

Also Published As

Publication number Publication date
EP0192234A2 (fr) 1986-08-27
EP0192234A3 (en) 1987-01-28
DE3679212D1 (de) 1991-06-20

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