EP2882535A1

EP2882535A1 - Concrete residue processing device and method for concrete residue processing

Info

Publication number: EP2882535A1
Application number: EP13744507.8A
Authority: EP
Inventors: Max F. SCHURAN
Original assignee: Lintec GmbH and Co KG
Current assignee: Lintec GmbH and Co KG
Priority date: 2012-08-10
Filing date: 2013-07-30
Publication date: 2015-06-17
Also published as: WO2014023608A1; CN103567059A; US20140042656A1; DE202012007655U1

Abstract

The invention relates to a compact concrete residue processing device (100) for mobile use on a concrete transport vehicle and/or concrete conveyance vehicle, comprising a processing chamber having an impact plate (110), an inlet opening (101) for concrete residue and an outlet opening (102) for processed concrete residue and two, three or more high pressure nozzles (130), wherein the impact plate, the inlet opening and the outlet opening are designed and arranged such that concrete residue filled into the processing chamber through the inlet opening strikes a receiving section (111) of the impact plate, passes a processing section (112) of the impact plate and leaves the processing chamber through the outlet opening, and wherein the high pressure nozzles are arranged and designed such that water jets exiting the high pressure nozzles strike the processing section of the impact plate.

Description

Residual concrete treatment device and method for the recycling of residual concrete

The invention relates to a residual concrete processing device and a method for residual concrete on reqitu.

For the processing of fresh concrete, for example on construction sites, the fresh concrete is usually transported by concrete transport vehicles and / or concrete trucks, such as truck mixers, truck mixer pumps, truck-mounted concrete pumps or mobile shotcrete machines to the processing site. Also in the processing of fresh concrete, for example, in a precast plant, the fresh concrete is transported by stationary or movable conveyors.

When transporting and processing fresh concrete, usually at the beginning and at the end of a concreting process, residual amounts of concrete, so-called residual concrete, accumulate, which can not be used for the intended purpose, but must be disposed of. At the beginning of a concreting process is such a waste to be disposed of amount of concrete, for example. the amount of concrete initially discharged from a concrete pump. This first delivered concrete usually has not required for processing in the field properties and compositions, as this first concrete amount must pass for the first time provided for delivery from a concrete pump pipes or hoses and thereby, for example, on the inner walls usually a film, especially cement paste and water, which is missing in the subsequently emerging first concrete as a component. Furthermore, at the end of a concreting process usually remains a residual amount of mixed fresh concrete in the concrete transport or concrete truck or a concrete pump back, which is no longer used and also to dispose of. Such residual amounts, for example, have a volume of 0.5 to 1.5 m ³ .

Fresh concrete has due to the properties of its components and their interaction so-called solidification and hardening properties. Solidification is the transition of fresh concrete from a flowable, plastic state to a solid state due to the hydration of the cement paste. Through continued hydration, the concrete hardens, i. H. he obtains a certain concrete compressive strength. Due to this solidification and hardening property, fresh concrete must be removed promptly from all tools and equipment used, as well as from concrete transport vehicles, concrete conveyors or pump piping. If the solidification already occurs when the concrete is still in the concrete transport vehicle, in the concrete truck or in pump lines, removal or disposal is usually no longer possible and the concrete transport or concrete truck or concrete pump is permanently no longer operational. Since from the mixing of the concrete until the onset of solidification or hardening only a certain time window, remains after the proper processing of the concrete on the site or in the precast plant only a limited period available to dispose of the residual concrete.

In practice, therefore, often incurred at the beginning and at the end of a concreting residual concrete quantities from the concrete transport vehicle, a concrete truck or a concrete pump in the environment, for example, to the soil of the construction site surrounding excavation. After the residual concrete has hardened there, it often remains in the ground and is undermined when the excavation pit is closed. This type of disposal of residual concrete is undesirable on the one hand and on the other not possible on many construction sites or in a precast construction. There are therefore concrete recycling plants that serve to re-separate the mixed for the production of fresh concrete ingredients and make them accessible for the re-production of fresh concrete. Such systems are set up, for example, on large construction sites or in precast plants. It is important that such a concrete recycling plant is reachable for the delivery of fresh concrete before it solidifies. Known concrete recycling plants operate on the principle of washing out of concrete. For this purpose, the residual concrete to be reused is mixed with a large amount of water in large washing drums. In these washing drums, energy is introduced via stirrers or rotating screws in order to achieve mechanical shear forces to detach the cement paste from the additives in the strongly diluted residual concrete. In this case, in particular, the addition of a lot of water and compliance with a certain ratio between water and residual concrete is required to prevent solidification and hardening. From this water-residual concrete mixture, the various constituents of the concrete are discharged separately, for example via sizing sieves, inclined dewatering or discharge screws or vibrating screen separators, and are preferably available again for the production of fresh concrete.

Such concrete recycling plants are known for example from DE 197 38 471 A1 or DE 297 23 981 U1. It is also described, for example, to construct the system parts as modular units, so that the parts of an entire system can be variably arranged. A concrete recycling plant is also known from GB 2301543 A, in which the residual concrete is first heavily diluted in a wash tank. Subsequently, this water-residual concrete mixture is placed on a vibrating screen to be separated there according to constituents, wherein additionally on the vibrating screen a further washing of the concrete can take place.

From DE 24 18 430 A1 a concrete washing plant is known, which has the goal of getting along with a smaller space than known recycling plant and to be transportable. For this purpose, DE 24 18 430 A1, first to promote the residual concrete by a screw and meanwhile by spraying with water to wash the cement water from the surcharges and dissipate through a sieve. This cement water is then separated in a centrifuge in gray water and cement slurry. The washed-out aggregates are discharged from the auger after they have run out. From WO 94/22581 A1 also a concrete recycling plant is known, given in the residual concrete in a rotating drum, where it is sprayed with water and separated by separation of the cement water and aggregates by grain size by different sieve sizes in its components. Furthermore, under the name VIBROWASH of CIFA SpA, a concrete recycling plant is known in which the residual concrete is placed on a vibrating screen and sprayed during the promotion on the vibrating screen for leaching with water. Water, cement and fines fall into one under the vibrating screen arranged tank, while the remaining on the vibrating screen washed out aggregates are discharged. The water-cement-fines mixture in the tank is kept in motion by mixers.

On the one hand, existing concrete recycling plants have the disadvantage that they require a large amount of water for the treatment of a certain amount of residual concrete, which is due to the principle of leaching or the watering down of the residual concrete. Furthermore, existing concrete recycling plants operate on the principle of disassembling the residual concrete as quickly as possible in its original components, in particular, weed out the coarse additions as quickly as possible and in particular to wash the cement paste and separate from the other components and dissipate. Another disadvantage is that the plants have a lot of space. Although the systems of DE 197 38 471 A1, DE 297 23 981 U1 or DE 24 18 430 A1 can be transported, but still require a lot of space on a construction site or in a precast plant. It is therefore an object of the present invention to provide a waste concrete treatment device, which reduces or eliminates one or more of the disadvantages mentioned above. In particular, it is an object of the present invention to provide a waste concrete treatment device, which can be carried on a concrete transport vehicle and / or a concrete truck and used at the changing locations of the concrete transport or concrete truck. Another object of the present invention is to provide a corresponding process for the recycling of residual concrete.

This object is achieved by a compact residual concrete processing device for mobile use on a concrete transport vehicle and / or a concrete truck, comprising a treatment room with a baffle plate, an inlet port for residual concrete and an outlet for recycled residual concrete and two, three or more high-pressure nozzles, said the baffle plate, the inlet opening and the outlet opening are formed and arranged such that residual concrete poured into the processing space through the inlet opening strikes a receiving portion of the baffle plate, passes through a conditioning section of the baffle plate and leaves the processing space through the outlet opening, and wherein the high pressure nozzles are arranged and are formed, that impinge on the processing section of the baffle plate from the high-pressure nozzles exiting water jets. The invention is based on the recognition that residual concrete loses its solidification and hardening property when the adhesion of the cement paste to the aggregate grains is severed and such mechanical separation of the cement paste from the aggregates can be achieved by treating the residual concrete with high pressure water jets. As a result, the known from the prior art strong dilution of the residual concrete as well as a spatial separation of the components, in particular a separation of aggregates and cement paste, for example via a leaching of the cement paste over a sieve, to prevent the solidification is no longer necessary. Rather, the recycled concrete prepared in a device according to the invention can be transported further after the high-pressure water jet treatment and / or stored without a solidification and / or hardening of the residual concrete occurs. In particular, the residual concrete treatment device is suitable and designed to treat residual concrete resulting from pumpable fresh concrete of a concrete conveyor or a concrete truck.

In order to achieve this, the residual concrete treatment device according to the invention provides for a treatment of the residual concrete with water jets emerging from high-pressure nozzles. The high-pressure nozzles can therefore also be referred to as working or conditioning nozzles, since the treatment of the residual concrete is effected by the water jets emitted by these nozzles. By high pressure is meant in the present invention, in particular a pressure of at least 1 MPa, preferably at least 2 MPa and in particular a pressure of at least 3 MPa. These water jets emerging from the high-pressure nozzles impinge on a baffle plate. On the baffle plate is to be prepared residual concrete, which is preferably distributed from the receiving portion of the baffle plate on the processing section of the baffle plate, where it is exposed to the water jets and then leaves the processing space through the outlet opening. The water jets emerging from the high-pressure nozzles penetrate the residual concrete present on the treatment section of the baffle plate and strike the baffle plate. In contrast to those shown in the prior art in recycling plants, where on a (vibrating) sieve residual concrete is sprayed with water (under much lower pressure), according to the invention the water jets emerging from the high-pressure nozzles can not pass through the openings of a sieve, but hit the baffle plate and are due to the high pressure of this at least partially reflected or rebound from there partially. Due to the high pressure at the high-pressure nozzles, the use of fresh or tap water is preferred since the high-pressure nozzles could be damaged by the fines contained in the gray water when using, for example, in the cleaning of concrete transport vehicles, concrete trucks or concrete pumps.

The baffle plate, on which the residual concrete is distributed and onto which the high-pressure water jets impinge, is preferably substantially closed and in particular has no screen-like openings. By this combination of water jets under high pressure on one side and a baffle plate instead of a sieve on the other side, the effect can be obtained that the water jets act on the residual concrete in the sense of a cutting knife, i. H. the compound of adhering to the aggregate cement paste is dissolved or separated and thus no solidification or hardening of the concrete takes place.

The mixture emerging after such a treatment through the outlet opening still contains all constituents of the residual concrete with a significantly lower amount of water supplied compared to the solutions known in the prior art. Without the preparation according to the invention by the high-pressure water jets impinging on the impact plate, such a mixture would still solidify and harden. Due to the treatment of the residual concrete located in the preparation section of the baffles by the high-pressure water jets that penetrate this residual concrete and impinge on the baffle plate, the residual concrete but the solidification and hardening properties are taken so that the exiting from the outlet mixture treated waste concrete without separation their Individual components can be stored as a mixture or disposed of, without this mixture solidifies or hardens. An additional subsequent separation of the mixture into its components, as usual in the known recycling plants, is also possible.

The residual concrete treatment device provides to arrange the baffle plate and the high-pressure nozzles for generating the water jets impinging on the baffle plate in a processing space, since due to the water jets striking high pressure on the residual concrete and the baffle plate below a corresponding rebound of water is mixed with concrete components , In order to be able to handle this rebound of water mixed with concrete constituents, the residual concrete treatment device has the treatment space in which the impact plate and the high-pressure nozzles are arranged. The treatment room is Preferably, it is substantially closed and preferably has no further openings other than the inlet and the outlet opening in order to prevent ejection of high-pressure water and concrete constituents fluidized therefrom.

Furthermore, this type of treatment allows a particularly small space, which allows the use of residual concrete processing plant on concrete transport vehicles and / or a concrete vehicles. The residual concrete treatment device can be carried on a concrete carrier vehicle, for example a truck-mounted concrete pump, and if necessary be positioned under, for example, the discharge opening of a truck-mounted concrete pump in order to collect residual concrete that accumulates at the beginning or end of a concreting operation. In particular, the residual concrete processing plant is dimensioned so that they can treat the resulting in the delivery of a filling of the conveyor system of a truck-mounted concrete pump amount of residual concrete. The processing plant is preferably dimensioned for a throughput of a maximum of 10 m ³ / h, for example a maximum of 5 m ³ / h, in particular of a maximum of 3 m ³ / h. The space required for this is particularly small due to the design and preparation of the residual concrete treatment device: It is only the processing room with the baffle and the high pressure nozzles arranged above required.

The processing space preferably has a bottom, side walls and an upper boundary. The inlet opening is preferably arranged in the upper boundary, the outlet opening preferably in the bottom. The inlet opening may, for example, have a rectangular, oval or substantially circular cross-section. Furthermore, a funnel can be arranged on the inlet opening in order to facilitate the filling of residual concrete into the inlet opening. The outlet opening may, for example, have a slot-shaped, strip-shaped or rectangular cross-section. It is particularly preferred that the outlet opening extends over the entire width of the baffle plate.

The inlet opening is preferably arranged at an upper end of the residual concrete treatment device. The residual concrete can preferably pass through the inlet opening onto the receiving portion of the baffle plate arranged thereunder essentially by gravity, preferably by free fall. In the operating state of the residual concrete treatment device is the Inlet opening preferably arranged higher than the outlet opening. A direction in which the residual concrete moves from the receiving portion of the baffle plate via the processing section to the discharge port may also be referred to as a processing direction. Further, it is preferable that the baffle plate is inclined horizontally in the operating state of the waste concrete processing apparatus such that the receiving portion of the baffle plate is positioned higher in the vicinity of the inlet opening than an end of the baffle plate in the vicinity of the outlet opening. In this way, residual concrete filled onto the receiving section of the baffle plate can preferably reach the outlet opening by gravity through the processing section of the baffle plate. In order to achieve a good spread of the residual concrete on the baffle plate, the baffle plate is preferably roof-like design with a substantially extending in the preparation direction ridge. The preferably along a center line extending ridge may be a comb-like elevation in the direction of the preparation direction of the baffle plate, from which two halves of the baffle plate are inclined downwards.

The baffle plate may further be connected to a drive device that is configured and arranged to vibrate the baffle plate. In particular, it is preferred that the baffle plate and / or the drive device is designed and arranged such that residual concrete located in the receiving section of the baffle plate is distributed and / or residual concrete is conveyed from the receiving section of the baffle plate along the processing section of the baffle plate to the outlet opening , In particular, it is preferred that the baffle plate and / or the drive device is arranged and configured such that the waste concrete to be reprocessed in the processing section of the baffle plate has a maximum layer thickness of twice the diameter of a largest grain of residual concrete to be processed, wherein it is particularly preferred the layer thickness substantially corresponds to the diameter of a largest grain of residual concrete to be processed. Such a distribution of the waste concrete to be reprocessed in the treatment section of the baffle plate is preferred because it can thus achieve particularly good results in terms of the mechanical separation of the cement paste from the surcharges by the high-pressure water jets. In a preferred embodiment, the waste concrete treatment device is characterized by a high-pressure pump, which is arranged and configured to direct water through a high pressure water line to the high pressure nozzles.

In particular, it is preferred that the high-pressure pump is designed to build up a water pressure of at least 1 MPa, preferably a water pressure of at least 2 MPa, in particular a water pressure of at least 3 MPa. Furthermore, it is preferred that the high-pressure pump has a maximum power of 20 kW, preferably of at most 10 kW, in particular of a maximum of 5 kW. It is even further preferred that the high-pressure pump is designed to deliver a maximum amount of water of 10 50 l / min, preferably a maximum of 30 l / min, in particular a maximum of 20 l / min.

A particularly preferred pump design provides a power of 5 kW for delivering 20 l / min at a pressure of 3 MPa.

The design of the high-pressure pump for conveying the water through a

15 high-pressure water line to the high-pressure nozzles on the one hand to provide the necessary for the Restbeton- treatment device high pressure, at the same time, however, preferably the power and the amount of water delivered should be relatively small. A low performance of the high-pressure pump has the advantage of a small size of the pump, which the use of the residual concrete processing device on a

20 facilitated concrete transport vehicle or a concrete truck. The promotion of a relatively small amount of water saves on the one hand a water, which is made possible that in the residual concrete treatment device no large amount of water to dilute the residual concrete is required, but the water in the form of a high pressure water jet only for the mechanical separation of the cement paste

25 the aggregate grains is used, as it were to sever the connection between cement paste and aggregate. In this way, compared to conventional concrete recycling plants, a considerable amount of fresh water can be saved in order to achieve a desired excess water, in particular a desired water-cement (TM) value. Through the treatment of the residual concrete by means of

30 High-pressure water jets can be compared to existing systems significantly increased water input into the cement paste mixture (and thus a higher TM value) are achieved while significantly lower amount of total supplied water. Furthermore, the low water consumption also allows a small size of Residual concrete processing device that allows use on a concrete transport vehicle and / or a concrete carrier vehicle.

A further preferred embodiment of the residual concrete treatment device provides that the treatment space has an upper cover, which is preferably designed to be removable. Furthermore, it is preferred that the upper cover, which is preferably detachably connectable to the side walls of the treatment space, can be connected in the operating state to the remaining housing, preferably the side walls, of the treatment space such that the treatment space is substantially closed except for the inlet opening and the outlet opening. The inlet opening is preferably located in the top cover. Further preferably, the high pressure nozzles and optionally a high pressure water line for supplying water in the high pressure nozzles are arranged on an inner side of the upper cover. The removability of the top cover facilitates the accessibility of the high pressure nozzles. The residual concrete treatment device may preferably be designed to allow heated water to escape from the high-pressure nozzles. For this purpose, the residual concrete treatment device, for example, have a corresponding heating device for the high-pressure water. Preferably, the water is heated to a temperature of about 30 ° C, in particular to a temperature of 40 to 60 ° C. This has the advantage that the water of the water jets has a lower surface tension than the water already contained in the cement paste. As a result, the absorption of the water of the water jets is improved in the aufbetenden residual concrete. In particular, a faster enrichment of the cement paste with water can be achieved with at the same time a small amount of total supplied water. In particular, a WZ value of 0.6 to 1 is preferred in order to prevent or reduce the solidification and hardening of the concrete.

A further preferred embodiment of the residual concrete treatment device is that the high-pressure nozzles are arranged and configured such that water jets emerging from the high-pressure nozzles strike the processing section of the baffle plate in a strip-shaped area.

It has been found that in such an arrangement of the high-pressure nozzles with a strip-shaped impact area in the processing section of the baffle plate particularly efficiently a separation of the connection between cement paste and aggregates can be done by the water jets.

The length of the strip-shaped region preferably extends over a large part of the width of the baffle plate, in particular over the entire width of the baffle plate. In this way it can be ensured that the entire waste concrete to be processed, which is located on the baffle plate, passes the water jets and thus the entire residual concrete is reliably processed. The strip-shaped region is furthermore preferably arranged substantially orthogonal to a processing direction.

It is particularly preferred that the strip-shaped region has a width which corresponds at most to twice the diameter of a largest grain of residual concrete to be processed

The strip-shaped region may, for example, have a maximum width of 10 cm, preferably of not more than 7.5 cm, in particular not more than 5 cm. It has been found that a narrow width of the strip-shaped region, in which the water jets impinge on the residual concrete and the baffle plate underneath, is not only sufficient, but can still increase the separation effect of the water jets. In this way it can be ensured that the high pressure with which the water jets emerge from the high-pressure nozzles, can be passed on substantially to the residual concrete in the strip-shaped area and thus the best possible and reliable separation of the cement paste from the aggregates can be achieved.

In a further embodiment of the residual concrete treatment device, the high-pressure nozzles are arranged and configured such that water jets emerging from the high-pressure nozzles impinge on the processing section of the baffle plate in two, three or more, preferably in the preparation direction, strip-shaped regions. The respective strip-shaped regions are preferably formed as described above.

By this arrangement of several rows of high-pressure nozzles or water jets in a row, the quality and reliability of the separation of the cement paste from the surcharges by the water jets can be increased. A preferred embodiment of the waste concrete treatment device is further characterized by two, three or more cleaning nozzles arranged and are designed to clean the processing space, in particular the high-pressure nozzles and / or the side walls and / or the top cover and / or the baffle plate.

The processing room of the residual concrete treatment device is itself in the processing of the residual concrete with high-pressure water jets, which hit the baffle plate and partially bounce back in its interior (including the high-pressure nozzles) strongly by the high-pressure water jets and their rebound whirled residual concrete Ingredients contaminated. Since the residual concrete components thus whirled up still have at least some of their solidification and / or hardening properties, the parts of the residual concrete treatment device which come into contact therewith, in particular the insides of the processing space and the high-pressure nozzles, must be cleaned at regular intervals in order to prevent solidification and hardening Harden the fluidized residual concrete components to prevent. For this purpose, the cleaning nozzles, which are preferably connected to a water line, acted upon with water and / or a cleaning liquid. The cleaning nozzles may be disposed on an inner side of the upper cover.

The cleaning nozzles are preferably arranged in their spray direction or spray angle such that their spray jets can easily reach the processing space and in particular the high-pressure nozzles, the side walls, the top cover and / or the baffle plate. Preferably, the cleaning nozzles are arranged so that they can also spray and clean each other cleaning nozzles. For this purpose, the cleaning nozzles are preferably subjected to a high pressure with water or cleaning liquid, preferably at the same pressure, with which the high-pressure nozzles are acted upon. The cleaning nozzles are preferably connected to the same water supply and / or the same high-pressure pump as the high-pressure nozzles.

It is further preferred that the waste concrete treatment device has a control device which is arranged and designed to start and / or stop the escape of water and / or cleaning liquid from the cleaning nozzles. In particular, it is preferred that the control device is designed to automatically start and / or stop the escape of water and / or cleaning fluid from the cleaning nozzles at specific time intervals. In this way, preferably pre-programmed, cleaning cycles can be performed, so that a regular cleaning of the treatment room and the high pressure nozzles takes place.

In this case, it is further preferred that the control device is arranged and configured to also start and / or stop the escape of water from the high-pressure nozzles and / or to start and / or stop the drive device. This embodiment is particularly preferred when the control device is also arranged and configured to allow alternate operation of the cleaning nozzles and the high pressure nozzles.

Such alternating operation of the cleaning nozzles and the high-pressure nozzles may also include the drive device, which is preferably started or stopped simultaneously with the high-pressure nozzles. In this way, in the context of a cyclic cleaning during the period of cleaning, the treatment of residual concrete (by the high-pressure water jets and possibly a vibration of the baffle plate) can be adjusted and adjusted during the treatment of residual concrete cleaning. In this way, a very efficient cleaning can be achieved, so that only a short cleaning time is required.

Furthermore, it is preferred that a first group of cleaning nozzles is arranged and designed to clean a region in the processing direction behind the high-pressure nozzles, in particular in the processing direction behind a strip-shaped region in which the water jets impinge, in particular in alternation with an operation of the high-pressure nozzles. Furthermore, it is preferred that a second group of further cleaning nozzles is provided, which is arranged and designed to clean a region in the processing direction in front of the high-pressure nozzles, in particular in the processing direction in front of a strip-shaped region in which the water jets impinge, in particular after completion of a treatment process a certain amount of residual concrete. The division of the cleaning nozzles into two groups has the advantage that the part of the treatment room, which is particularly affected by the rebound of the water jets, can be cyclically cleaned and the input area of the treatment room, in which the waste concrete to be processed is filled, cleaned only at the end of a treatment process is when no new residual concrete is filled.

Another preferred embodiment of the residual concrete treatment device provides two, three or more, preferably in the vertical direction one above the other arranged baffles with associated high-pressure nozzles. The respective baffles with associated high-pressure nozzles can be arranged in each individual treatment rooms or a common processing space. The inlet opening of a second treatment space is preferably formed by the outlet opening of a first treatment room. When arranging the plurality of baffles with associated high-pressure nozzles in a common processing space are between the baffles, preferably at the end of a baffle plate, passage openings through which the processed on the first baffle plate with associated high-pressure nozzles residual concrete can reach the next baffle plate for subsequent processing there. Particularly preferred is a zigzag-shaped arrangement, seen in cross-section, of inclined baffle plates with a correspondingly zigzag-shaped preparation direction of the residual concrete. In this way, in particular for the same base area of the residual concrete processing device and only slightly greater height, a multiplication of the treatment path can be generated so that the quality and reliability of the treatment can be improved.

A further development form of the residual concrete treatment device is characterized by a one, two or more separating device (s) which is designed and arranged, the processed residual concrete according to its constituents, in particular aggregates, preferably different grain size, cement paste and / or greywater, to separate. As a separation device, for example, a sieve or a centrifuge can be used. This training serves to separate the recycled residual concrete, which has already lost its solidification and / or hardening property, optionally after transport or storage in its original constituents or some certain of these original constituents to remove, for example, a fresh production of fresh concrete accessible close.

Particularly preferred is a design of the residual concrete treatment device, which is characterized in that the residual concrete treatment device has a base area which is less than or equal to the base of a standard range, in particular a Europoolpalette.

Preferably, the residual concrete treatment device has a maximum length of 1200 mm and a maximum width of 800 mm. If, according to these forms of training, the residual concrete processing device has such a small footprint, the entrainment is in particular on a concrete transport vehicle in particularly simple way possible. Many concrete lift trucks have a footprint the size of a Europool range. It is therefore particularly preferred that the residual concrete processing device has a footprint that corresponds to a maximum of such a Europool range, so that they can be carried on appropriate parking concrete delivery vehicles.

Furthermore, it is preferred that the residual concrete processing device is formed so compact that it can be mounted as an attachment, directly or with distance, to an output hopper of a concrete truck and carried there, so that must not be implemented for the residual concrete processing device for their use but can be used at their installation site.

Furthermore, it is preferred that the residual concrete treatment device has a height which is at most 1 m, preferably at most 90 cm, in particular at most 80 cm. In particular, it is preferred that the residual concrete treatment device have a height that is less than or equal to half the height of a standardized ISO container, preferably less than or equal to one third of the height of a standardized high-cube ISO container.

These forms of training have several advantages. First, such a height limit of the waste concrete treatment device allows their use for a variety of Betontransport- or concrete trucks, since a residual concrete treatment device with such a limited height usually below an output hopper or discharge pipe of Betontransport- or Concrete conveyors can be arranged. In this way, the residual concrete processing device can not only be easily carried on a concrete transport or concrete truck, but removed at the site of the concrete transport or concrete truck from its footprint on the concrete transport or concrete truck and under an output hopper or a delivery pipe for Fresh concrete of the concrete transport or concrete delivery vehicle are placed to prepare accumulating residual concrete directly at its place of origin. If this recycled residual concrete has lost its solidification and / or hardening properties, the prepared residual concrete can either be stored or transported over a greater distance, since no specific, short time window to solidification or hardening of the concrete is more to be observed. On the other hand, such a height limitation has the advantage that several residual concrete processing devices can be arranged one above the other in a standardized ISO container. Further, for example, the residual concrete treatment device may be arranged in a frame that corresponds in its base to a standardized ISO container and in height corresponds to, for example, half or one-third of the height of this standardized ISO container. In this way, the residual concrete processing device arranged in such a frame can either be combined with other such residual concrete processing devices arranged in a frame or with other frame racks which likewise correspond, for example, to half, one third or two thirds the height of a standard ISO container, be assembled to such an ISO container and transported accordingly. In particular, it is preferable for a residual concrete processing device arranged in a frame to have a concrete conveying device, preferably likewise arranged in a frame and possibly also with another frame, for example for a concrete conveyor drive, air conditioning and / or sound damping, together to form a standardized ISO Container can be combined.

In order to realize the lowest possible height of the residual concrete treatment device, it is particularly preferred that the distance between the high-pressure nozzles and the preparation section of the baffle plate is at most 80 cm, preferably at most 60 cm, in particular at most 40 cm.

According to a further aspect of the invention, the object mentioned at the outset is achieved by a mobile concrete recycling plant comprising a waste concrete treatment device as described above, one, two or more receiving containers for aggregates, preferably different particle size, cement paste and / or gray water, a discharge device for aggregates, preferably of a certain grain size, and a fresh water tank in fluid communication with a water conduit of the waste concrete processing apparatus.

Such a mobile concrete recycling plant can preferably be developed by arranging all components of the concrete recycling plant in a frame or housing whose dimensions correspond to a standardized ISO container, in particular its base area of a standardized high-pressure container. Cube ISO containers and whose height is less than or equal to half, in particular less than or equal to one-third, the height of a standard high-cube Corresponds to ISO containers. Furthermore, the base area of the concrete recycling plant can also correspond to a part of a base area of a standardized ISO container, preferably half, one third or one quarter.

For the advantages, variants and details of execution of this further aspect of the invention and its further developments, reference is made to the preceding description of the corresponding features of the residual concrete treatment device. A particular advantage of the mobile concrete recycling plant is that it can be used, for example, in a precast plant as a module below a concrete pump to prepare the resulting in a precast concrete residual concrete directly on the one hand, that he his solidification and / or hardening properties loses and then subsequently again at least partially separate into its original components, so that a reuse of these components for the production of fresh concrete is made possible.

According to a further aspect of the invention, the object stated at the outset is achieved by a method for the recycling of residual concrete, in particular by means of a residual concrete treatment device as described above, comprising the steps: filling of rest concrete to be processed through an inlet opening onto a receiving section of a baffle plate in a treatment space, Conditioning the residual concrete on a conditioning section of the baffle plate in the processing space by water jets emerging from high pressure nozzles impinging on the conditioning section of the baffle plate, discharging recycled concrete from an outlet opening from the processing space.

This method and its possible further developments have features or method steps which make them particularly suitable for being used with a residual concrete processing device according to the invention and its further developments.

For the advantages, design variants and details of this method and its further developments, reference is made to the preceding description of the corresponding features of the residual concrete treatment device. Preferred embodiments of the invention will be described by way of example with reference to the accompanying figures. Show it: FIG. 1 shows a three-dimensional view of a residual concrete treatment device;

FIG. 2 shows a side view of the residual concrete processing device according to FIG. 1;

FIG. 3 shows a plan view of the residual concrete processing device according to FIG. 1;

FIG. 4 shows a sectional view along the sectional plane A-A from FIG. 2; FIG. 5 shows a sectional view along the sectional plane B-B from FIG. 3;

Figure 6: a three-dimensional view of a mobile concrete recycling plant;

FIG. 7 shows a side view of the concrete recycling plant according to FIG. 6;

Figure 8 is a plan view of the concrete recycling plant according to Figure 6;

FIG. 9 shows a three-dimensional view of a first baffle plate for the residual concrete treatment device according to FIG. 1; and

FIG. 10 shows a three-dimensional representation of a second baffle plate for the

Residual concrete processing device according to FIG. 1.

FIGS. 1 to 5 show a residual concrete processing device 100 according to the invention for mobile use on a concrete transport vehicle. This residual concrete processing device 100 is particularly compact and has a base area corresponding to the base of a standard Europool range and has a maximum length of 1200 mm and a width of 800 mm. The height of the residual concrete processing device shown here is a maximum of 80 cm. With these dimensions, the residual concrete processing device can be transported, on the one hand, on a Europool pallet footprint, in particular of a concrete transport vehicle, and can also be used under the discharge funnel or an output line of a concrete transport or concrete transport vehicle.

The residual concrete processing apparatus 100 has a detachable top cover 150 in which a circular inlet port 101 for residual concrete is formed. On the inside of the top cover 150 is a high pressure water line 131 with high pressure nozzles 130, also referred to as working nozzles or conditioning nozzles can be arranged, as can be seen in particular in Figure 5. In particular, in Figures 1, 4 and 5 are also also in the interior of the upper cover 150 arranged and connected to a water line 141 cleaning nozzles 140 can be seen. In the interior of the device 100, a receiving space is formed with a baffle plate 10 formed here as a baffle plate with a receiving portion 1 1 1, which is formed below the inlet opening 101 and a subsequent processing section 1 12, which is arranged near the outlet opening 102. In the vertical direction below this processing space, there is a second space with a second baffle 120, whose inlet opening 103 coincides with the outlet opening 102 of the processing space and whose outlet opening 104 is formed at the end of the second baffle plate 120.

The two baffles 1 10 and 120 are shown in detail again in Figures 9 and 10. The first baffle plate 1 10 is roof-like with a substantially extending in the direction of preparation AR First 1 13. This comb-like elevation 1 13 divides the baffle plate 1 10 approximately in the middle, the two sections 1 14 and 1 15 are inclined laterally downwards. In a first inclination direction, the baffle plate 1 10 is inclined to the horizontal, that the receiving portion 1 1 1 of the baffle plate in the vicinity of the inlet opening 101 is disposed higher in the operating state of the waste concrete processing device 100 as an end of the baffle plate in the vicinity of the outlet opening 102nd

The second baffle plate 120 also has an inclination to the horizontal and is further provided with a wave-shaped surface 121. This second baffle plate 120 may not only carry continuously arranged grooves as shown in FIG. 10, but the grooves may be interrupted or as a tear plate (eg as a so-called Nippon- Floor or DIN 51 130), as shown in Fig. 4, formed , Further, in the second baffle plate openings may be introduced or the baffle plate 120 may be formed as a sieve, since the required for the preparation closed baffle plate is already provided by the baffle plate 1 10 and thus the second baffle plate 120 also other functions, such as a sieve and / or separation function and / or a slowdown in the promotion of recycled residual concrete, can take over.

The outlet opening 102 is formed in the shape of a slot or strip or at the end of the baffle plate 1 and extends over the entire width of the baffle plate 1 10. The inlet opening 101 is formed at an upper end of the residual concrete preparation. Device 100 is arranged and in the operating state of the residual concrete preparation device 100 higher than the outlet opening 102 arranged. The residual concrete to be filled into the inlet opening 101 can pass from there to the receiving section 11 1 of the baffle plate 10 essentially by gravity, in particular by free fall. From there, the residual concrete, preferably also by gravity, possibly supported by a vibration drive, on the receiving portion 1 12 of the baffle plate and from there to the outlet opening 102. In front of this simultaneously serving as an inlet opening 103 outlet opening 102, the recycled residual concrete reaches the second baffle 120 and from there by gravity to the lower end of the second baffle plate 120 and through the outlet opening 104 from the residual concrete processing device 100 out.

As a result of the embodiment of the baffle plate 10, which can be seen in particular in FIG. 9, a particularly good and uniform distribution of the residual concrete on the baffle plate 110 and, in particular, on the processing section 12, is achieved. This distribution and the promotion of the residual concrete on the baffle plate 1 10 can be further supported by a vibration drive, which can be arranged for example at the connection points 170 of the side walls 105 of the processing space.

The processing space has side walls 105, with which the upper cover 150 can be detachably connected. The lower space in which the baffle plate 120 is disposed also has side walls 106.

The high-pressure nozzles 130 are arranged and formed in such a way that residual concrete located on the processing section 12 of the baffle plate 110 is penetrated in a strip-shaped region of water jets emerging from the high-pressure nozzles 130. These jets of water impinge on the processing section 1 12 of the baffle plate 1 10 and are thrown by this back into the receiving space. The high-pressure nozzles 130 are connected via a high-pressure water line 131 to a high-pressure pump 160 (see FIGS. 6 to 8). This high-pressure pump 160 generates a pressure of preferably 3 MPa and thereby delivers 20 liters of water per minute to the high-pressure nozzles with a power of about 5 kW. By means of this treatment with water jets under such high pressure, the treatment room is sprayed on its inside over a large area with residual concrete constituents. Even if the recycled residual concrete after irradiation with the high-pressure water jets on its exit from the outlet opening 102 its Solidification and / or hardening property has substantially lost, the residual concrete components injected onto the inner wall of the receiving portion these properties, possibly in a reduced form, still on. For cleaning the treatment room and in particular the high-pressure nozzles 130 and high-pressure water line 131 arranged therein cleaning nozzles 140 are provided, which are fed by a water line 141 and in particular by a cyclic, automatically controlled cleaning program the treatment room and the high-pressure nozzles 130 and the high-pressure line 131 at regular intervals with water or clean cleaning fluid. The cleaning nozzles 140 are preferably arranged, designed and aligned such that they also clean other cleaning nozzles 140 and / or the water line 141. The baffle plate 1 10 is preferably cleaned by the cleaning nozzles 140, especially when no residual concrete is present in the residual concrete processing device 100.

As can be seen in FIGS. 6 to 8, a residual concrete processing device 100 according to the invention can be integrated in a mobile concrete recycling plant 200. This concrete recycling plant 200 has a Zementleimbehälter 201, three gray water tank 202, 203, 204, a container 205 for via the discharge screw 230 discharged from the residual concrete processing device 100 aggregates aggregates, a fresh water tank 210 with associated pre-pressure pump 21 1 and a control cabinet 220 on. The components of the mobile concrete recycling plant 200 are arranged in a frame 240 whose footprint corresponds to the footprint of a standard ISO container. The height of this frame 240 preferably corresponds to one-third of a standard high-cube ISO container. Preferably, all components of the mobile concrete recycling plant 200 are arranged within the space bounded by the frame 240.

The in the example shown here above the frame 240 protruding high-pressure pump 160 is preferably dimensioned so that it does not protrude beyond the frame 240 but like all other components is arranged in the frame 240 limited space.

The frame 240 preferably has conventional container attachment or connection means, so that the mobile concrete recycling plant on the one hand can be moved and transported as a container and on the other hand together with other mobile concrete recycling plants or other devices in similar Frame frames are arranged, can be assembled to form an overall frame, which corresponds in size to a standardized ISO container. In particular, when the mobile concrete recycling plant 200 has the flat height shown here of one third of the height of a standardized ISO container, preferably a high cube ISO container, it offers the advantage that two thirds of the height of the standardized ISO containers for another arranged in a frame module are available and in such a module, for example, elements of a concrete pump can be arranged. In particular, a combination of a mobile concrete recycling plant with a concrete conveyor is preferred, the frame racks can be combined to form a standardized ISO container. Another preferred combination is the combination of a - arranged in a frame - mobile concrete recycling plant, concrete conveyor and drive device (possibly with air conditioning and Schalldämfpung) to a standardized ISO container.

Claims

A compact residual concrete processing device (100) for mobile use on a concrete transport vehicle and / or concrete transport vehicle, comprising a treatment room with a baffle plate (1 10), a residual concrete inlet opening (101) and an outlet opening (102) for recycled residual concrete and two, three or a plurality of high pressure nozzles (130),

wherein the baffle plate, the inlet opening and the outlet opening are formed and arranged such that through the inlet opening into the processing space filled residual concrete hits a receiving portion (1 1 1) of the baffle plate, passes through a processing section (1 12) of the baffle plate and the

Leaving treatment room through the outlet opening,

and wherein the high-pressure nozzles are arranged and configured such that water jets emerging from the high-pressure nozzles strike the treatment section of the baffle plate.

Residual concrete processing device (100) according to one of the preceding claims,

characterized by a high pressure pump (160) arranged and configured to direct water through a high pressure water line (131) to the

To guide high pressure nozzles (130).

Residual concrete treatment device (100) according to the preceding claim, characterized in that the high-pressure pump (160) is designed to build up a water pressure of at least 1 MPa, preferably one

Water pressure of at least 2 MPa, in particular a water pressure of at least 3 MPa.

characterized in that the processing space has an upper cover (150), which is preferably designed to be removable. Residual concrete processing device (100) according to one of the preceding claims,

characterized in that the high-pressure nozzles (130) are arranged and designed such that water jets emerging from the high-pressure nozzles in a strip-shaped area on the processing section (1 12) of the

Hit baffle plate (1 10).

Residual concrete processing device (100) according to one of the three preceding claims,

characterized in that the strip-shaped region has a width which is at most twice the diameter of a largest grain of

to be processed residual concrete corresponds.

characterized by two, three or more cleaning nozzles (140) which are arranged and configured, the processing space, in particular the high-pressure nozzles (130) and / or the side walls (105) and / or the upper cover (150) and / or the baffle plate ( 1 10) to clean.

characterized by a control device which is arranged and formed, the leakage of water and / or cleaning liquid from the

Start and / or stop cleaning nozzles (140).

Residual concrete treatment device (100) according to the preceding claim, characterized in that the control device is arranged and designed to enable an alternating operation of the cleaning nozzles (140) and the high-pressure nozzles (130).

characterized in that the residual concrete processing device has a base area which is less than or equal to the base of a standard range, in particular a Europoolpalette. Residual concrete processing device (100) according to one of the preceding claims,

characterized in that the residual concrete processing device has a height which is at most 1 m, preferably at most 90 cm, in particular at most 80 cm.

characterized in that the residual concrete processing device has a height which is less than or equal to half the height of a standardized ISO container, preferably less than or equal to one third of the height of a standardized high-cube ISO container.

13. Mobile concrete recycling plant (200), comprising

15 - a residual concrete processing device (100) according to one of

previous claims,

- one, two or more receptacles for surcharges (205),

preferably of different grain size, cement paste (201) and / or gray water (202, 203, 204),

20 - a discharge device for surcharges (230), preferably one

certain grain size,

- A fresh water tank (210) in fluid communication with a water pipe of the residual concrete Aufitunggsituu ng.

25 14. Mobile concrete recycling plant (200) according to the preceding claim,

characterized in that all components of the concrete recycling plant are arranged in a frame (240) or a housing whose dimensions correspond to a standardized ISO container, in particular its base area of the base standardized high-cube ISO container

30 and whose height is equal to or less than half, in particular less than or equal to one third, the height of a standardized high-cube ISO container corresponds.

Process for the preparation of residual concrete, in particular by means of a residual concrete treatment device (100) according to one of the preceding claims 1 to 12,

comprising the steps: Filling of reprocessing residual concrete through an inlet opening (101) on a receiving portion (1 1 1) of a baffle plate (1 10) in one

Treatment room

Treating the residual concrete on a treatment section (1 12) of the baffle plate (1 10) in the preparation space by water jets emerging from high-pressure nozzles (130) and impinging on the conditioning section of the baffle plate,

- Dispensing recycled waste concrete from an outlet opening (102) from the processing space.