EP3538333A1 - Procédé et dispositif de fabrication d'une pierre à pavé - Google Patents

Procédé et dispositif de fabrication d'une pierre à pavé

Info

Publication number
EP3538333A1
EP3538333A1 EP17801634.1A EP17801634A EP3538333A1 EP 3538333 A1 EP3538333 A1 EP 3538333A1 EP 17801634 A EP17801634 A EP 17801634A EP 3538333 A1 EP3538333 A1 EP 3538333A1
Authority
EP
European Patent Office
Prior art keywords
concrete
shell
concrete mixture
sensor
mold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP17801634.1A
Other languages
German (de)
English (en)
Inventor
Dany WINDMOLDERS
Wilfried Blocken
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.)
Windmolders Beton NV
Original Assignee
Windmolders Beton NV
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 Windmolders Beton NV filed Critical Windmolders Beton NV
Publication of EP3538333A1 publication Critical patent/EP3538333A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/04—Producing shaped prefabricated articles from the material by tamping or ramming
    • B28B1/045—Producing shaped prefabricated articles from the material by tamping or ramming combined with vibrating or jolting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
    • B28B17/0063—Control arrangements
    • B28B17/0081—Process control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
    • B28B3/022—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form combined with vibrating or jolting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/005—Control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/022—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space whereby the material is subjected to vibrations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
    • G01N33/383—Concrete or cement

Definitions

  • the invention relates to a method and an apparatus for producing a concrete paving stone.
  • Under paving stone handy concrete form stones are understood, which are laid on sidewalks, roads, etc.
  • Such paving stones are known for example from WO 2013/076115 AI.
  • DE 103 31 758 AI gives general information on concrete for paving stones. It states that a water cement value of 0.4 is considered optimal.
  • concrete blocks are produced by shaking, while the shaking is limited in time to a minimum. Measuring probes are inserted in the individual concrete masses in order to detect the consistency of the concrete mass and to be able to finish the stamping pressure and the shaking process at a suitable moment.
  • WO 2006/117173 A2 discloses a system and a method for producing concrete products, in particular paving stones. It explains the individual processes of production. A vibration measuring device is used, with the help of which the applied vibration energy can be measured and checked.
  • a multiple mold is generally used, with which a number of paving stones can be formed at the same time. It has a multiplicity of interconnected shells which adjoin one another. Each shell has a common side wall with an adjacent shell, an associated multiple stamp has a corresponding number of punches which are arranged side by side and operated together.
  • an initial shaking is first performed so that the concrete mixture evenly distributed in the individual shell.
  • at least one further shaking operation is carried out with the aim of compacting the concrete mix.
  • the stamp is pressed onto the concrete mixture, whereby a flat surface for the paving stone is achieved.
  • the shaking is done on a vibrating table. On this the multiple form is brought. When shaking the stamp remains stationary relative to the shell.
  • the shaking is performed only for a short time, for example 4 ⁇ 2 sec. This refers to a final shaking or main shaking, which may precede a shaking.
  • the duration of the main litter is critical for the quality of the later paving stone. If shaken for a long time, a good compaction is achieved, but shape deviations occur, in particular side surfaces of the paving stone become soft. If shaken too briefly, the stone does not have sufficient strength and shape.
  • the Haittefzeit is also dependent on the filled concrete pulp, in particular its water content. The distribution of grain, the proportion of fine-grained material, and the proportion of cement in the concrete pulp have an influence on the shaking time.
  • the object of the invention is to provide a method and a device, taking into account the previously known methods and devices allow improved control of the manufacturing process so that the quality of the molded brick is more consistent.
  • This method has the advantage that the shaking process is only carried out in each case until a desired value for the at least one electrical variable is obtained.
  • the concrete slurry in the mold is detected during the retting by at least one electrical measurement and it is ensured that the finished vibrated paving stone has an electrical size that is indistinguishable from other paving stones of the same batch or another batch.
  • a concrete mix is made in a mixer. At least the water content of this concrete mixture is recorded, preferably also the water cement value. Possibly. Also, other properties of the concrete mixture are detected prior to filling, e.g. the fluidity, the weight and the like.
  • the concrete mix is now poured into the mold, usually using a multiple mold.
  • the individual compartments of the multiple form each form shells, which are filled with the concrete mixture.
  • an initial shaking process which is relatively short and often lasts less than 1 second, the concrete mixture is first spread evenly in the mold. Thereafter, a punch of the mold is moved into the shell and pressed. This is usually followed by an initial shake and a main shake. The stamp remains on the concrete mixture and closes the shell upwards.
  • a measurement of the ohmic resistance and / or an ultrasonic signal is now carried out.
  • a partial area of the concrete mixture in the form is detected.
  • This sub-area may be a superficial area that extends into the interior over only a few millimeters depth from an outer surface of the concrete mix. But it can also be a volume measurement. Both measurements are combined possible.
  • From the recorded during the Hintteins electrical size is now a Signa! derived, which leads to the shutdown of a shaking process.
  • the time course of a change in the electrical variable is observed and determines when the electrical quantity will take a predetermined, stored value.
  • This predetermined value can be determined, for example, by preliminary tests. In general, it is stored in a value table. There, for different initial values of the concrete mixture, which initial values have already been recorded prior to filling, the time periods respectively determined as optimal for the main shaking are stored.
  • a vibrator also called vibration device
  • the period from the filling of the concrete mixture into the mold until demolding is only a few minutes, for example 2 to 3 minutes. During this time, the concrete mix hardens not noticeable.
  • the detection of the at least one electrical variable is therefore due to change during the shaking process by which the concrete mixture is compa keted. By this shaking the electrical resistance changes, it changes the behavior when passing through an ultrasonic signal.
  • An ultrasonic signal runs faster with increasing shaking and with less attenuation through the concrete slurry. Due to the increasingly stronger compaction of the starting slurry during Hintteins the interstices of the concrete mix are increasingly filled better, whereby the sound propagation time increases and the sound attenuation is lower.
  • transverse waves can be used because they give better information about material properties, but longitudinal waves can also be used.
  • resistance measurement can be used with DC voltage, but it can also be detected resistance with AC voltage. It can be the electrical size, such as the resistance of a surface near area detected, but it can also be measured in a volume range.
  • the advantage of the method is that the at least one sensor is arranged on the mold itself, so that it can be measured during the rinsing.
  • the object is further achieved by the device according to claim 5. It is designed for carrying out the method according to claim 1 and ge suitable.
  • a device is used as it is state of the art. This is additionally equipped with at least one sensor, with the associated measuring device and their connection to the control unit of the vibrator. In the measuring device, in the control unit or in a separate component, a table for the optimum Gantteldauer is stored taking into account the parameters of the output mixture. There is also the switch-off delay tA stored, other influencing variables can be stored.
  • the mold rests on a vibrating plate so that access from below is difficult.
  • the measurement of the electrical variable therefore preferably takes place on a side surface of the mold and / or in the stamp.
  • an outer wall of an outer shell can be used. It can also be Maschinenschal lt by ultrasound a variety of individual trays. It has proved to be advantageous to arrange the sensors on an externally accessible wall of a tub and / or the stamp.
  • small electrodes are preferably used. You have to example 0.5-2 cm 2 area. At least one Electrode is isolated and in direct contact with the concrete pulp.
  • the shell if it is made of metal, can be used as an electrode, the same applies to the stamp.
  • the ultrasound measurement can be carried out through the wall of the tub and / or the punch, in this case, the wall serves as a flow path. It is also possible to bring ultrasonic sensors into direct contact with the concrete pulp. One can also exploit a reflection of the ultrasonic waves on a wall of the shell and thus capture a longer path. In preliminary tests, it has been shown that individual surface areas of the vibrated paving stones have higher humidity than others.
  • the invention relates to paving blocks which consist of a uniform mixture and to paving blocks, which are essentially made of a simpler concrete and a superficial layer of a header. Here are two filling operations in succession. During the retting, the intent and the ground substance usually behave differently under the intent. It is therefore advantageous to detect at least one electrical variable of the attachment and at least one electrical variable to the ground substance.
  • the detection of the at least one electrical variable can already begin before the shaking process. It can begin as soon as the shell has been filled and, if necessary, the stamp has been put on, if a sensor is provided in it. However, only during the Hintteins a noticeable change in at least one electrical variable is measurable.
  • the electrical variable is preferably designed and selected such that it is influenced in particular by the shaking process.
  • Fig. 1 a simplified representation of some parts of the apparatus for producing a paving stone, namely a concrete mixer, a filling device and a mold, a schematic representation similar to FIG. 1, but now for a closed, filled with concrete slurry form, based on a vibrating table a vibrator device, the mold is equipped with two sensors, each connected to a measuring device, which is connected to a control unit and to a memory, a perspective view of a partially cut tray with a total of three sensors, a plan view of a multiple mold, a Shell is equipped with two sensors, a perspective view of a stamp of a form, the Un ter Structure is equipped with three sensors, a representation of the time course of the amplitude of an ultrasonic signal, and a diagram of the time course of measurements to Errei chen a predetermined W ertes.
  • FIG. 1 schematically shows a concrete mixer 20, which may also be designed as a transport container. In it is a concrete slurry 21, too Called concrete mix. About a filling device 22, this concrete slurry 21 is filled in a shell 24. The shell 24 belongs together with a stamp 26 to a shape.
  • FIG. 1 shows that the shell 24 is located below the device 22. The shell 24 has an upper opening, which is covered in the further course by the punch 26, this is shown in FIG. 2,
  • the punch 26 has already been pressed onto the concrete slurry 21, it has previously been an initial shaking.
  • the now closed mold is located on a vibrating table 28 of a vibrating device 30. It is assigned a control unit CON 32.
  • a first sensor 32 and a second sensor 34 are embedded in the wall so that their front surfaces have direct contact with the concrete slurry 21.
  • the two sensors 32, 34 are ultrasonic oscillators, specifically an ultrasonic transmitter 32 and an ultrasonic receiver 34. These are designed for a frequency of 2 MHz and have a resonator diameter of about 25 mm. They are connected via a specially helical lead 40 with an M ES 42 measuring device. About the special leads 40, the shaking motion is intercepted. It typically takes place at a frequency of 50 Hz with an amplitude of 2 to 20 mm.
  • the measuring device 42 is designed here as an ultrasonic measuring device, it generates a transmission pulse (see FIG. 6) for the sensor 32 and prepares the signals received by the sensor 34.
  • the ultrasound passes once through the concrete slurry in the direct line between the two sensors 32, 34. It can be the sound propagation time and the Schailschwhariung be measured.
  • the measuring device 42 is connected to a memory MEM 44. It contains a value table which contains the best values for the duration of the main lump as a function of several influencing variables, for example the moisture content of the concrete slurry 21 in the concrete mixer 20, the mechanical deformability of this concrete pulp, for example measured by an indenter or toughness , the grain distribution in the concrete pulp and the specific gravity. Thus, the value for the period of the main rinsing is present as a predetermined value V in the measuring device 42.
  • the measuring device 42 determines an electrical variable from the ultrasound signals (see FIG. 6), see Figure 7. This changes constantly during the shaking process, as Figure 7 shows. Figure 7 shows only a few individual measuring points, in reality much more measuring points are obtained.
  • the shell 24 is provided with two directly adjacent sensors 36, 37, which are suitable for a resistance measurement. They are identical. You have a distance from each other, for example, between 1 and 10 cm. They each have a central electrode 46 and around it an insulating body 48. this insulates the electrode with respect to the shell 24.
  • the electrode 46 is in each case connected to a corresponding measuring device 42.
  • the two electrodes 46 are in contact with the concrete slurry.
  • the resistance of a surface area of the concrete slurry can be determined via the two electrodes 46.
  • the resistance of a volume region of the concrete slurry can be measured via at least one of the two electrodes and the entire metallic shell as counterelectrode.
  • a sensor 38 is still arranged in a side wall, which is an ultrasonic transceiver. It is connected to a corresponding measuring device 42. About him a measurement signal is obtained. He first sends out a transmission pulse, as shown in Figure 6, this passes through the concrete slurry. A wall reflects the sound signal, the reflected signal goes back to the transceiver, which is now in the receiving operation is. Also in this way ultrasonic measurements can be achieved, as described above.
  • FIG. 4 In the embodiment of Figure 4 is a multiple form is shown, of which only a small portion is shown, Shown is a complete shell 24, which is located in a corner area and therefore easily accessible. It is adjacent to three other, only partially shown shells 24, the shells 24 a multiple shell are identical.
  • the fully illustrated shell 24 is provided on an outer wall with two sensors 38, 39.
  • the sensor 38 corresponds to the ultrasonic sensor as described above for FIG.
  • the sensor 39 is placed from the outside on the outer wall of the mold, it is also designed as a transceiver. His pulse first radiates through the metallic wall, then passes through the concrete porridge, is reflected on the opposite partition and returns to the sensor 39 back. This sensor is evaluated like the sensor according to FIG. 3. In the arrangement according to FIG.
  • the sensors 38, 39 can also cooperate.
  • the transmission pulse of the sensor 38 can also be received by the sensor 39 in the reception mode and vice versa. It is also possible to irradiate a whole series of shells 24. If a transceiver is used, reflected signals of further partitions of the multiple form are also received. In this way, the double path of the form shown completely in FIG. 4 and the second form adjacent to the right is detected, later in time the echo signal of the third form adjoining it in the x-direction arrives, etc.
  • the use of a transmitter 32 is advantageous instead of the sensor 38 in Figure 4 and a receiver 34 on the opposite in the x-direction outer wall of the multiple mold.
  • FIG. 5 shows how sensors 36, 37 and 38 are arranged in the stamp 26 on the lower surface.
  • the sensors 36, 37 correspond to the sensors 36, 37 according to FIG. 3 and are evaluated accordingly.
  • Figure 5 shows a sensor 38 of the ultrasonic type, which is directed in the beam direction to the bottom of the shell 24. The ultrasonic pulse is reflected there and returns to the sensor 38 back.
  • the three sensors 36-38 of the punch 26 may be used to determine at least one electrical size of a header of the concrete block.
  • the sensors of the shell 24, for example according to Figure 3 can be used to detect the ground substance. In this way, two-layer concrete blocks can be detected technically.
  • FIG. 6 shows the typical sequence of an ultrasonic measuring process.
  • a transmission pulse 60 is radiated into the concrete pulp. This passes through the concrete slurry and arrives at a receiver, possibly after one or more reflections, at time 52. Another ultrasonic signal arrives at time 54, a third signal at time 56, etc. Normally, the longitudinal waves are faster and the signal 52 is thus the signal of a longitudinal wave.
  • the other signals can be assigned accordingly, typically at time 54, the signal of the transverse wave has arrived.
  • the transit time is determined, from which the speed of sound can be determined. This changes during the shaking process.
  • the amplitude of the signals can be detected. As FIG. 6 shows, the amplitude of the signals generally decreases progressively. The amplitude, ie the height of the signals, changes during the retting. If it grows larger during the retting, this means less attenuation of the ultrasonic signal in the concrete pulp.
  • FIG. 7 shows an example of the procedure.
  • an electrical quantity M with the value 70 is obtained. This can be achieved, for example, via a single measurement, for example only of the resistance, or via an evaluation of several measurements obtained by resistance measurement and ultrasound measurement. A short time later, and thus a small period of Hintte later a second value 72 is obtained, which is different from the 1st. This continues with a third value 74, etc.
  • the tel steroids 30 must be switched off so that at the end of the shaking the final value 80 is reached.
  • the mathematical method initially does not consider the decay process that takes place during the turn-off delay. Rather, it is initially assumed that the shaking process continues undisturbed.
  • the time period tx can be determined such that in the time period between tO-tA and tO + tx, a total energy of the product is achieved, as it exists without switching off in the time period from tO-tA to tO.
  • the time span between tO - tA and tO is the switch-off delay.
  • the duration of the delayed delay is tA.
  • the switch-off delay can be taken into account.
  • tx Vz (tO - tA) can be selected.
  • the method for producing a paving stone proceeds from a concrete mixture 21 filled into a mold.
  • the mold has a shell 24 and a stamp 26.
  • the shell 24 has an upper opening which covers the punch 26 from ⁇ .
  • the mold is equipped with at least one sensor that detects at least one of the following electrical variables: a) ohmic resistance of a portion of the concrete mixture 21, b) measured value of an ultrasound signal that has passed through at least a portion of the concrete mixture 21.
  • a shaking of the mold located therein with Betonmi ⁇ Research 21 by means of a vibrating device 30 and in at least one Rüttel Kunststoff occurs.
  • At least one electrical variable is detected at least during the shaking, including the time course of the change in the electrical quantity, and it is determined when the electrical variable reaches a predetermined level. stored value will take.
  • the shaking is switched off, taking into account a switch-off delay of the vibrator 30, so that it comes to a standstill when the at least one electrical variable assumes the predetermined, stored value.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Automation & Control Theory (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'une pierre à pavé d'un mélange de béton (21) rempli dans un moule. Le moule comporte une coquille (24) et un poinçon (26). La coquille (24) comporte une ouverture supérieure, laquelle recouvre le poinçon (26). Le moule est équipé d'au moins un capteur, lequel détecte au moins une des grandeurs électriques suivantes : a) la résistance ohmique d'une zone partielle du mélange de béton (21), b) la valeur mesurée d'un signal ultrasonore, lequel traverse au moins une zone partielle du mélange de béton (21). Selon le procédé, une vibration du moule rempli du mélange de béton (21), au moyen d'un vibrateur (30) et dans au moins une étape de vibration, est effectuée. Au moins une grandeur électrique, au moins pendant la vibration, y compris l'évolution temporelle de la variation de la grandeur électrique, est détectée et déterminée si la grandeur électrique prend une valeur prédéterminée, mémorisée. La vibration est désactivée, en fonction d'un retardement de coupure du vibrateur (30), de telle sorte que ledit vibrateur s'immobilise lorsque l'au moins une grandeur électrique prend la valeur prédéterminée, mémorisée.
EP17801634.1A 2016-11-10 2017-11-09 Procédé et dispositif de fabrication d'une pierre à pavé Withdrawn EP3538333A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016121578 2016-11-10
PCT/EP2017/078747 WO2018087221A1 (fr) 2016-11-10 2017-11-09 Procédé et dispositif de fabrication d'une pierre à pavé

Publications (1)

Publication Number Publication Date
EP3538333A1 true EP3538333A1 (fr) 2019-09-18

Family

ID=60421750

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17801634.1A Withdrawn EP3538333A1 (fr) 2016-11-10 2017-11-09 Procédé et dispositif de fabrication d'une pierre à pavé

Country Status (2)

Country Link
EP (1) EP3538333A1 (fr)
WO (1) WO2018087221A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109001262B (zh) * 2018-09-21 2020-07-03 浙江大学 基于电阻率的水泥水化度动态监测系统与方法
CN109955346B (zh) * 2019-04-17 2020-12-11 岑嘉琪 一种建筑用土坯夯实装置及其使用方法
DE102021106330A1 (de) * 2021-03-16 2022-09-22 Wacker Neuson Produktion GmbH & Co. KG Betonverdichtungssystem und Verfahren zum Verdichten von Betonteilen im Rahmen eines Betonverdichtungsprozesses

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB645998A (en) * 1948-07-28 1950-11-15 Square Grip Reinforcement Comp Method of manufacturing concrete
DE3326331C1 (de) * 1983-07-21 1984-07-12 Bien, Reinhold Verfahren und Vorrichtung zum Herstellen von Betonteilen
DE3937698A1 (de) 1989-11-13 1991-05-23 Hermann Dipl Ing Willeck Verfahren zum herstellen von betonsteinen im ruettelverfahren
FR2656425B1 (fr) * 1989-12-21 1992-04-30 Cerib Procede et dispositif de controle non destructif pour des elements en beton.
DE19615915C2 (de) 1995-04-22 1998-01-29 Prestel Betonsteinwerk Gmbh Verfahren zum Überwachen und Steuern der Festigkeit von Betonsteinen bei deren chargenweiser Herstellung
DE19856259B4 (de) * 1998-12-07 2005-05-19 Universität Stuttgart Verfahren zur Untersuchung eines erstarrenden und/oder erhärtenden Werkstoffs mittels Ultraschalls
DE10331758B4 (de) 2003-07-14 2005-06-30 Remei Gmbh & Co.Kg Verfahren zu deren Herstellung einer nicht abgebundenen Betonmischung und Verwendung eines Gemisches als Betonverdicker
DE102005020428A1 (de) 2005-04-29 2006-11-02 Harald Winkler Anlage und Verfahren zum Herstellen von Betonwaren
EP1993795A1 (fr) * 2006-03-13 2008-11-26 Rampf Formen GmbH Dispositif et procédé de production de corps moulés en béton humide ou en des matériaux de type apparenté
WO2013076115A1 (fr) 2011-11-21 2013-05-30 Windmolders Beton Nv Pavé en pierre artificielle et procédé de fabrication dudit pavé

Also Published As

Publication number Publication date
WO2018087221A1 (fr) 2018-05-17

Similar Documents

Publication Publication Date Title
EP3538333A1 (fr) Procédé et dispositif de fabrication d'une pierre à pavé
DE2527050C3 (de) Einrichtung zur automatischen Zubereitung von Getränken und flüssigen Nahrungsmitteln
WO2004059260A1 (fr) Appareil de mesure de niveau et procede pour mesurer le niveau selon le principe de temps de propagation
EP2223059A1 (fr) Procédé de mesure du niveau de remplissage
DE102006035730A1 (de) Verfahren und Vorrichtung zur Verarbeitung von Lebensmitteln
EP1993795A1 (fr) Dispositif et procédé de production de corps moulés en béton humide ou en des matériaux de type apparenté
DE2758105C2 (de) Vorrichtung zum Kühlen von rückgeführtem Gießereiformmaterial
DE4434696A1 (de) Verfahren zur Kontrolle und/oder Sicherung der Qualität der Betonverdichtung bei der Herstellung von Betonsteinen in Betonsteinmaschinen
EP3096931A1 (fr) Procédé et dispositif de commande de processus dans une installation de production de mousses en continu
DE2513072B2 (de) Verfahren und Vorrichtung zum Befiillen einer Preßform für Betonplatten, Keramikfliesen o.dgl
CH627126A5 (fr)
EP0177024B1 (fr) Méthode et dispositif de réglage de la profondeur de travail des socs de semoir
DE102016124859A1 (de) Verfahren zur Bestimmung der Geschwindigkeit einer Schüttgutoberfläche, Füllstandmessgerät und Verwendung eines Füllstandmessgeräts
WO2018202831A1 (fr) Procédé et dispositif de fabrication d'une pierre à pavé
DE10245341B4 (de) Verfahren und Vorrichtung zum Bestimmen einer Menge eines Schüttgutes
DE3326331C1 (de) Verfahren und Vorrichtung zum Herstellen von Betonteilen
DE10163195A1 (de) Wäschepflegeeinrichtung mit Feuchtesensor und Verfahren zur Messung der Feuchte in einer Wäschepflegeeinrichtung
DE3001602A1 (de) Verfahren und vorrichtung zur bestimmung der anstiegsgeschwindigkeit eines aufschaeumenden polymerschaumgemisches
DE3502861A1 (de) Verfahren und vorrichtung zur betondosierung bei der herstellung von beton-fertigteilen
DE19836818C2 (de) Verfahren und Vorrichtung zur Abdichtung von Kanalsohlen
DE3937698A1 (de) Verfahren zum herstellen von betonsteinen im ruettelverfahren
DE2459950A1 (de) Verfahren und vorrichtung zur herstellung von flachen verbundplatten, die vorgefertigte bauelemente fuer trennwaende und mauern von gebaeuden bilden
DE102020122132B4 (de) Ermittlung eines Wärmedurchgangs von Gebäuden
EP1554097B1 (fr) Procede de production de briques perforees comprenant des obturateurs de trou et briques obtenu ainsi
EP0903209A1 (fr) Procédé et dispositif pour la fabrication d'éléments en béton

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20190606

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20200103