FLOATING DEVICE FOR PRODUCING CONCRETE ON WATERWAYS

Abstract

The present invention relates to a floating device for preparing and transporting a concrete mortar, comprising at least: - a concrete batching plant for preparing a concrete mortar, comprising one or more buffer silos - a crane on a mobile platform for feeding raw materials to the concrete batching plant - one or more storage means for aggregate such as sand and gravel respectively - one or more water tanks - one or more mooring masts, wherein the concrete batching plant, the crane, said storage means and one or more water tanks are all located on the same floating device, wherein the concrete batching plant is located at the first distal end of the device and at least one of the water tanks is located under the deck at the second distal end of the device. In another aspect, the present invention relates to a method for manufacturing a concrete mortar according to a device as described herein.

Description

Title of the invention: FLOATING DEVICE FOR PRODUCING CONCRETE ON WATERWAYS Technical field

[0001] The invention relates to methods and devices for the manufacture of concrete mortar. STATE OF THE ART

[0002] Today, concrete is one of the most popular building materials. It is made by pouring and curing concrete mortar consisting of cement, water, and sand, gravel, and / or crushed stone. Typically, this concrete mortar is prepared in advance at a central location using a stationary concrete batching plant and then transported to a construction site. The concrete mortar is then poured on-site at the construction site. Mixer trucks are usually used to transport the concrete, as the concrete must remain homogeneous during transport to avoid segregation during the often long journeys.

[0003] However, this road transport of concrete mortar is expensive: it requires the use of mixer trucks and drivers, and fuel. In the event of traffic jams, these costs increase further. The regular supply of concrete mortar is then also compromised, which can lead to delays on site and a loss of quality. In addition, this road transport involves an increase in traffic volume due to the arrival and departure of mixer trucks. Locally, this can cause serious inconvenience.

[0004] Furthermore, this transport of concrete mortar is very harmful to the environment, particularly in terms of CO2 emissions. In this context, we can refer to the climate objectives of the Paris Agreement, which require the transport sector to reduce its CO2 emissions by 50% by 2050.

[0005] Therefore, for construction sites located near waterways, including offshore wind farms, quay walls, water-related structures, etc., it is advantageous to provide concrete batching plants using these waterways.

[0006] Such a device for producing and transporting concrete is known, among others, from document BE1024916. BE1024916 describes a floating concrete plant comprising two floating pontoons, the first pontoon comprising a concrete plant and the second pontoon comprising a floating buffer stock of aggregate, intended to supply the first pontoon with aggregate for the continuous operation of the concrete plant.

[0007] However, the use of such a concrete plant has a number of disadvantages. First of all, the device consists of two floating platforms or pontoons, which makes it bulky. In addition, the two pontoons complicate transport on waterways. Furthermore, it is also safer for maintenance technicians to have all components on a single platform.

[0008] There is therefore a need for an optimized device and a corresponding method for the production of concrete mortar on waterways. Preferably, said device facilitates transport by waterway and is as compact as possible. Preferably, said device can be used at certain sites that are difficult to access or inaccessible by road. It is also important that it can operate as CO2-neutral as possible.

[0009] The present invention aims to solve at least some of the above-mentioned problems. Summary of the invention

[0010] In a first aspect, the present invention relates to a floating device according to claim 1, for concrete mortar.

[0011] Preferably, said floating device is suitable for preparing concrete mortar by floating on water, for example on inland waterways. In particular, it is a floating device comprising at least one concrete batching plant, a crane on a crane platform and a water tank. Said device thus makes it possible to supply concrete mortar to almost any construction site located at sea or near a major waterway. Road transport is thus minimized or avoided. Preferably, all raw materials are also supplied by waterway. The invention therefore contributes to sustainable mobility, provided that there is no unnecessary use of roads. The plant thus contributes to CO2-neutral concrete production.

[0012] The resources and raw materials needed to produce concrete are all located on a single device or pontoon. In addition, since the device consists of a single pontoon, stability is ensured at all times. Preferably, the device is a barge.

[0013] Another advantage is that some construction sites that are difficult to access and are located along a waterway can still be served in a simple manner. These include, for example, construction sites located in port areas, in densely populated regions and in inhospitable areas bordered by waterways. The present invention also allows the supply of concrete mortar for the construction of offshore wind farms and other offshore structures. An important advantage is that the concrete batching plant does not take up space on the construction site itself. Another advantage is that the device consists of a single pontoon, which guarantees, at at any time, its stability on the water. Another advantage is that the device is a barge, which simplifies the transport of the device on waterways. Finally, the device also contributes to low CO2 concrete production.

[0014] In a second aspect, the present invention relates to a method or use for the production of concrete mortar on a floating device according to claims 11-13. Preferably, this method according to one of claims 11-13 is partially automated. DESCRIPTION OF FIGURES

[0015] [Fig.l] shows a schematic representation of a device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The present invention relates to a device for producing concrete mortar. The device makes it possible to produce concrete on water with a low or neutral impact in terms of CO2. For this purpose, a device as compact as possible is designed, while ensuring the stability of the device.

[0017] Unless otherwise stated, all terms used in the description of the invention, including technical and scientific terms, are used in the sense as generally understood by those skilled in the technical field of the invention. For a better judgment of the description of the invention, the following terms are explicitly explained.

[0018] "Un", "une", "le", "la" and "les" refer in this document to both the singular and the plural except where the context clearly requires otherwise. "A segment" means, for example, one or more segments.

[0019] When "about" or "roughly" is used herein, a measurable quantity, parameter, duration or moment etc. means variations of + / -20% or less, preferably + / -10% or less, more preferably + / -5% or less, even more preferably + / -1% or less, and even more preferably + / -0.1% or less of the cited value, as long as such variations apply to the above invention. However, the value of the quantity with which the term "about" or "roughly" is used, must itself be specifically expressed.

[0020] The terms "comprise", "comprising", "composed of", "composed of", "intended to", "comprise", "comprising", "contain", "containing" are synonyms and are inclusive or open terms indicating the presence of the following, and not excluding or preventing other components, features, elements, members, phases, known to or described in the state of the art.

[0021] Quoting numerical intervals by means of endpoints includes all integers, fractions and / or real numbers between the endpoints, including those endpoints.

[0022] The terms "create", "manufacture", "produce" and "prepare" are synonymous.

[0023] The term "pontoon" is equivalent to a floating platform.

[0024] The term "barge" means a type of inland waterway vessel constructed and intended to be pushed by another vessel and therefore not requiring a crew during navigation, except when mooring and unmooring.

[0025] The term "telescopic" means that the length can be changed by sliding parts into each other.

[0026] In a first aspect, the present invention relates to a floating device for preparing a concrete mortar. Said device comprises at least the following elements: - a concrete plant for the preparation of concrete mortar, comprising one or more cement buffer silos, - a crane on a mobile platform for supplying raw materials to the concrete plant, - one or more means of storing aggregate such as sand and gravel - one or more water tanks, and - one or more mooring masts.

[0027] In one embodiment, the concrete batching plant, the crane, said storage means and one or more water tanks of the device will all be located on the same floating device, the concrete batching plant being located at the first distal end of the device and at least one of the water tanks being located below deck at the second opposite distal end of the device.

[0028] In the present invention, the term "distal end" refers to the end furthest from a reference point, namely the center of the device. The device as described herein has two distal ends.

[0029] In the context of the present invention, the expression "below deck" means the location of an object, for example in this case the water tank, which is at least partially and preferably entirely in the hold.

[0030] Preferably, the device also comprises means for receiving and / or containing the aggregates, which may be made in any manner known in the field of concrete engineering. For example, a space is provided on the platform, where one or more stocks of aggregate are arranged. In particular, said means comprise at least one aggregate hopper, and preferably several aggregate hoppers, in which mutually separated buffers of different types of aggregate are arranged. Said means for receiving and / or containing the cement can also be made in several ways, as is known from concrete engineering. Preferably, the cement is stored in a sealed silo, avoiding any contact with external moisture. More preferably, the means for receiving and / or containing the cement and aggregates are designed in such a way that the cement and aggregates can be extracted therefrom in a simple manner, for example by means of emptying points, such as at the bottom of the hoppers. Said aggregate storage means can also be called aggregate storage units and aggregate hoppers.

[0031] Contrary to what is already known in the current state of the art, the entire device is provided on a single pontoon or barge. This presents certain risks in terms of stability. The inventors of the present invention have found that the stability of the device can be ensured by appropriate location of certain components of the concrete plant on the device. For example, it is important to position at least one of the water tanks under the bridge, at the distal end opposite the distal end containing the concrete plant.

[0032] In one embodiment, the water tank located under the bridge, which is located at the second distal end of the device, has a volume capacity of between 100 m3 and 150 m3. The water tank is not only important for the operation of the device (water supply for the preparation of the concrete mortar), but the inventors have also found that, to ensure the stability of the device, the position of said elements as described above is crucial. In particular, the presence of the water tank under the bridge at the second distal end has proven crucial to ensure this stability.

[0033] In one embodiment, the distance between the second distal end of the device and the water reservoir under the bridge is at most equal to 1 / 3 of the total length of the device. In another embodiment, the distance will be at most 1 / 4 of the total length, more preferably 1 / 5. In another embodiment, said distance is between 1 / 5 and 1 / 3 of the total length of the device.

[0034] In one embodiment, the distance between the first distal end of the device and the concrete plant is at most 1 / 3 of the total length of the device. In another embodiment, the distance is at most 1 / 4 of the total length, more preferably at most 1 / 5. In another embodiment, said distance is between 1 / 5 and 1 / 3 of the total length of the device.

[0035] In one embodiment of the device, there is a storage space under the bridge from the concrete batching plant to the second distal end. This saves space on the construction site itself. In one embodiment, at least part of the aggregate storage means is located under the bridge. This saves space on the construction site and, in addition, makes the device more compact.

[0036] In one embodiment, the device is a barge. This means that it is an inland navigation vessel constructed and intended to be pushed by another vessel and therefore does not require a crew during navigation, except when mooring and unmooring. This makes the use and transport of the device easier and safer than if this device consisted of two pontoons.

[0037] In one embodiment, a sensor controls the supply of aggregate from the aggregate hoppers to the aggregate storage tanks by means of the crane on the crane platform. Said crane will operate when it receives a signal from the sensors indicating that the aggregate tanks of the concrete plant are reduced to the point of requiring replenishment.

[0038] According to a non-limiting example, the aggregate hoppers, and in particular the crane, are equipped with a digital camera system. The control system has access to the collected digital images. Said images make it possible, in particular, on the basis of intelligent image processing, to estimate the number of aggregates present in an aggregate hopper and the way in which they are distributed in said compartment. This data is then used to control the crane. The system is thus able to determine whether aggregates can be transferred to a particular aggregate storage area on the platform, and where these aggregates are located in the aggregate hopper. Preferably, this control is fully automatic. However, it should be emphasized that other control systems and associated sensors may be used, such as those known in the field of control technology.

[0039] According to a non-limiting embodiment, an alert is generated as soon as the volume of a certain type of aggregate in the aggregate hopper falls below a predefined level. It is possible to react by sending another vessel to supply the device with aggregate. Said alert can be generated on a central graphical interface of the system. However, in addition or in parallel, an SMS or other digital message can also be sent to the operator's digital device (e.g., a smartphone).

[0040] In one embodiment, the device is further provided with a concrete batching plant with at least one or more storage areas for aggregates such as gravel and sand, an office, a technical area with compressors, pumps and batteries, a buffer mixer, a mixing tower, a concrete pump with a receiving hopper, means for receiving and distributing water. The buffer mixer is equipped with one or more sensors for measuring the amount of concrete mortar present. In particular, said sensors comprise at least one height sensor. The buffer mixer serves as a buffer for the concrete mortar so that the concrete pump can provide a continuous flow at all times. As soon as the concrete in the receiving hopper of the concrete pump falls below a certain level, the buffer mixer is put into the discharge position. The receiving hopper is then replenished with concrete mortar, so that the supply to the concrete pump is ensured. Otherwise, the pump risks sucking in air. On the other hand, when the concrete mortar rises above a certain level, the buffer mixer moves from the discharge position to the mixing position or to a stop. This prevents overflow. Determining the level height makes it easy to estimate the quantity of concrete in the receiving hopper. It should be emphasized that it is not necessary to measure the actual quantity and that it is sufficient to collect any information related only to this quantity, for example, the level height in a hopper.Preferably, an electronic sensor is used for this purpose, and more preferably, said sensor communicates directly with an automatic control system which ensures the supply of fresh concrete mortar. Suitable sensors can operate using ultrasound, microwave (radar) or laser technology. However, a mechanical sensor (e.g. with a float) and any other suitable sensor can be used.

[0041] The concrete mortar preferably comprises at least water, cement and aggregates. The concrete may also comprise additional admixtures, as known in the current state of the art. The additional admixtures may be added in powder and / or liquid form. The measured amounts of these substances may be introduced into a mixing tower and mixed with the measured amounts of water, cement and aggregates to form a quantity of concrete mortar.

[0042] Preferably, the aggregate hoppers are also automatically replenished and the crane is therefore fully automated. Preferably, the aggregate hoppers are equipped with sensors for this purpose, in order to estimate the remaining quantity of aggregate they contain. Level sensors or load cells are used, for example. However, any other suitable type of sensor may be used. Preferably, the floating aggregate buffer stock is also equipped with one or more sensors. According to a non-limiting example, the aggregate buffer stock, and in particular its shoveling device, are equipped with a digital camera system. The control system then has access to the collected digital images. These images make it possible, in particular, on the basis of intelligent image processing, to estimate the number of aggregates present in an aggregate compartment and the manner in which they are distributed in this compartment.This data is then used to control the shoveling device. On the one hand, the system is able to determine whether, and where, aggregates must / can be replenished from a ship. aggregate buffer stock audit. On the other hand, the system is able to determine whether aggregates can be transferred to a particular aggregate hopper on the platform, and where these aggregates are located in the aggregate buffer stock. This control is fully automatic. However, it should be noted that other control systems and associated sensors can be used, as is known in the field of control technology.

[0043] Preferably - but not necessarily - the aggregates, which would be necessary if the stocks on the device were insufficient, are supplied by water. The present invention thus contributes to sustainable mobility. However, it is also possible to serve more distant construction sites by covering the so-called "last mile" using a mixer truck. The concrete mortar is then either poured directly into the mixer truck or pumped into the mixer truck, via the concrete pump. On the one hand, road transport is still considerably reduced, since the total distance is reduced. On the other hand, all construction sites located near a waterway can be supplied with concrete mortar. Another advantage is that certain construction sites located along a waterway will now be served more efficiently.Examples include construction sites located in port areas, cities, or in inhospitable landscapes. Difficulty accessing them by road may be due to traffic jams, nuisances, lack of roads, lack of sufficiently wide roads, etc. Other examples include construction sites for offshore wind farms and other offshore structures. The present invention would make it possible to prepare the concrete mortar for these construction sites on site.

[0044] For concrete mortar, tap water is generally used, or at least water of sufficient quality. Each time, when the preparation of a new quantity begins, a high flow rate is briefly required. The flow rate of the tap water may then be insufficient, so that a buffer tank is preferably provided on or near the platform. Said buffer tank is continuously replenished with tap water, up to an adjustable level. However, a buffer tank placed on the quay takes up space on or near the construction site. On the other hand, a buffer tank placed on the platform represents a (highly) variable mass and may therefore require continuous adjustment via the water tank(s). The present invention provides a surprisingly elegant solution to these problems in which water is extracted from a buffer tank located on the quay via a second buffer tank located on the device.In addition, there is also a water tank at the second distal end of the device. This water tank is also necessary to ensure the stability of the device. This water tank(s) then fulfills / fulfills a double function, and the concrete plant thus becomes more compact.

[0045] In one embodiment, the concrete batching plant is connected to the aforementioned water tank via a cleaning water recovery system. In another embodiment of the device, the water used in the concrete batching plant is at least partially recovered under the bridge. Preferably, the water is fully recovered. The water used in the concrete batching plant is partially recovered via the cleaning water recovery system and returned to the water tank. This is also an important advantage of the device, as it optimizes water consumption, thereby reducing the volume of the required water tank and resulting in a more compact device.

[0046] The term "water tank", as used herein, is to be understood broadly as a body enclosing a fully enclosed or partially enclosed internal volume, this volume being configured to contain a quantity of water. Each water tank, and its water contents, will exert a force and a moment of force on the floating platform under the influence of gravity. These force(s) and moment(s) of force will thus influence the total draft and the tilting of said platform along the force arm(s). According to a non-limiting embodiment, the water tank is a semi-open or closed container or bag, placed above or along the structure of the platform, or integrated therein. By controlling the quantity of water contained in the water tank, said force and said moment of force are also controlled, as well as the draft and the inclination of the platform.Preferably, the system for filling and emptying the water tanks is at least partially automatic. When filling and emptying said water tank, the draft and the inclination of the platform are taken into account.

[0047] A mooring mast is a steel (or sometimes wooden) post that runs across or alongside the vessel, can be raised and lowered, and allows the vessel to moor to the bottom of the waterway.

[0048] In one embodiment, the device is equipped with at least two mooring masts. This is an essential element due to their role in stabilizing the vessel against currents. Said masts serve to hold the device in place when it is stationary. Said masts are sized on the basis of simulation exercises, as known in the field of engineering. The masts can be raised and lowered using electric winches. They are telescopic and are operated by electric winches.

[0049] In a second aspect, the invention also relates to a method for manufacturing a concrete mortar, in which the concrete mortar is produced by means of a floating device as described above. The invention also describes a use of the device described above for producing a concrete mortar. In a preferred embodiment, said method is at least partially automated. DESCRIPTION OF THE FIGURE

[0050] [Fig.l] shows a schematic representation of an embodiment of a floating device (1) for the manufacture and transport of concrete, floating on water (2). For this purpose, the floating device 1 comprises a concrete batching plant (3), consisting of separate storage units (4) for aggregates such as sand and gravel (separate units not shown in the figure), a buffer mixer (5), a technical room (6), where pumps, batteries and compressors for the operation of the concrete batching plant are located (not shown in the figure), an office (7), a mixing tower (8) which is also in contact with the cement storage units (not shown in the figure), a receiving hopper (9) which is in contact with a concrete pump (10), and a buffer tank (13).The device (1) as a whole is about 110 m long, about 12 m wide and about 13 m high, and its maximum production capacity is between 80 m3 and 130 m3 of concrete mortar per hour. In addition, the device (1) is equipped with separate aggregate hoppers (11), to receive and contain the aggregates: aggregate hoppers (11a) for sand, and aggregate hoppers (11b) for gravel. The aggregate hoppers (11) are replenished from above with fresh aggregates. These aggregates are then transported by means of a mobile crane (18) on a crane platform (17), to the top of the aggregate storage units (4). The advantage is that there is no need for an additional floating platform with raw materials, which makes the device (1) more compact. In addition, there is no need to return to the dock to supply the concrete plant with raw materials.The device (1) is also equipped with two mooring masts (19), one at each distal end of the device. These mooring masts (19) are telescopic and are operated by electric winches. The mooring masts (19) ensure the stability of the device when it is stationary.

[0051] All the aggregates, cement and water are then introduced into the mixing tower (8) and mixed into a quantity of concrete mortar. The water used is preferably tap water, other waters of sufficient quality can also be used. In the case of tap water, the flow rate provided is generally insufficient: a large quantity of water is required (even briefly) each time a new quantity of concrete mortar is produced. The water is therefore supplied, for example, from a buffer tank (13), which is continuously replenished with tap water up to an adjustable level. Furthermore, there is a water tank (12) at the second distal end of the device. Said water tank (12) is in the form of a vertical tank sealed under the deck and is placed approximately 1 / 3 of the way from the second distal end of the device.This is to prevent the device (1) from tipping over; in fact, the concrete plant (3) is the heaviest load (force . total normal per covered area) on the device (1). The water is supplied from the water tank (12) to the concrete plant (3) by means (16) provided for this purpose. The water used in the concrete plant is partially recovered by the water collector (14) and is thus returned to the water tank (12) by means (15) provided for this purpose.

[0052] After mixing, the quantity of concrete mortar is introduced into a buffer mixer (5). Said buffer mixer (5) is constructed as a continuously operating horizontal axis drum mixer, i.e. with an inlet at one end and an outlet at the opposite end. Inside, the buffer mixer (5) is equipped with blades, to mix its contents in a first rotation, according to the free fall principle, and to empty its contents along the discharge, in an opposite rotation. Therefore, the buffer mixer (5) is configurable between a mixing mode (first rotation), a discharging mode (opposite rotation) and a stop mode (no rotation / actuation of the blade drum).When the concrete mixing plant (3) is used intensively, it is intended that there is always a quantity of concrete in the buffer mixer (5), so that the buffer mixer (5) can always generate a concrete flow at its outlet at the request of the operator or the control system. Whenever the quantity of concrete in the buffer mixer (5) falls below a defined lower threshold value, a new quantity of concrete is generated and fed into the buffer mixer (5). To determine the quantity of concrete present in the buffer mixer (5), the latter is equipped with sensors. The total mass of concrete in the buffer mixer (5) can then be derived indirectly from the values ​​measured by the sensors.

[0053] Finally, the concrete batching plant (3) is equipped with a concrete mortar pump (10) with a receiving hopper (9). The arrangement is such that the discharge from the buffer mixer flows into the receiving hopper (9) of the concrete mortar pump (10).

[0054] When the concrete pump (10) is switched on, it generates a (continuous) flow of concrete mortar through its discharge pipe, for example to a construction site. In doing so, it is preferable that it is also continuously supplied with concrete mortar. Otherwise, the concrete pump may suck in air. It is therefore preferable that there is always a minimum amount of concrete in the receiving hopper (9) when the concrete pump (10) is switched on. For this purpose, the receiving hopper (9) is equipped with at least one level sensor. When the level of concrete mortar, measured by means of the level sensor, falls below a lower threshold value, the buffer mixer (5) is put into discharge mode. The receiving hopper (9) is then replenished with concrete mortar so as not to jeopardize the supply of concrete mortar to the concrete pump (10).On the other hand, when the level of concrete mortar, measured by the level sensor, exceeds an upper threshold value, the . buffer mixer (5) is either put into mixing mode or into stop mode. This is to prevent the receiving hopper (9) from overflowing.

[0055] Furthermore, the aggregate storage units are supplied with raw materials from the aggregate hoppers via a crane on a crane platform, when the aggregate stock is to be replenished. The aggregate storage hopper (11) is divided into several aggregate compartments, for the separate storage of different types of aggregate, in particular sand (11a) and gravel (11b). Furthermore, the device (1) is equipped with a platform (17) movable in the longitudinal direction, which platform (17) is equipped with a crane (18). Preferably, the aggregates are delivered by ship. Said crane (18) is therefore, on the one hand, suitable for transferring the aggregates from a ship to one of the aggregate storage hoppers (11). On the other hand, it is suitable for replenishing the aggregate storage units (4) from above, with fresh aggregate from one of the aggregate storage hoppers.Said crane can move horizontally on the device (1) by means of the crane platform. The advantage of such aggregate storage hoppers (11) is that it is not necessary to accumulate piles of aggregate on the quayside, close to the construction site. Thus, the space occupied on the quayside, on and around said construction site, is as small as possible.

[0056] Said storage hopper (11) has a length of approximately 70 m, a width of approximately 12 m and a depth of approximately 5 m. Its total aggregate storage capacity is approximately 3,780 tonnes.

[0057] The numbered elements of the figure are as follows: 1. Floating device 2. Water 3. Concrete plant 4. Aggregate storage units 5. Buffer mixer 6. Technical room 7. Office 8. Mixing tower 9. Receiving hopper 10. Concrete pump 11. Aggregate storage hoppers 12. Water tank 13. Buffer tank 14. Cleaning water recovery system 15. Means of water drainage to the water tank 16. Means of supplying water from the water tank to the concrete plant 17. Crane platform 18. Crane 19. Mooring mast

Claims

Claims

1. A floating device (1) for manufacturing a concrete mortar, comprising at least: - a concrete batching plant (2) for preparing a concrete mortar, comprising one or more cement buffer silos - a crane (18) on a mobile crane platform (17) for feeding raw materials to the concrete batching plant - one or more storage means (4) for aggregates such as, for example, sand and gravel, - one or more water tanks (12), characterized in that the concrete batching plant (3), the crane (18) and said storage means (4) and one or more water tanks (12) are all located on the same floating device (1), wherein the concrete batching plant (2) is located at the first distal end of the device (1) and at least one of the water tanks (12) is located under the deck at the second opposite distal end of the device (1),wherein said under-deck water tank (12) has a volume capacity of between 100 m3 and 150 m3 and the distance y between the second distal end of the device and the under-deck water tank is at most 1 / 3 of the total length x of the device.,

2. The device according to claim 1, characterized in that the distance z between the first distal end of the device and the concrete plant (2) is at most 1 / 3 of the total length x of the device.

3. The device according to one of the preceding claims, characterized in that, from the concrete plant to the second distal end, there is a hold under the deck.

4. The device according to one of the preceding claims, characterized in that at least part of the means for storing the aggregates is located under the bridge.

5. The device according to one of the preceding claims, characterized in that the device is a barge.

6. The device according to one of the preceding claims, characterized in that it has a sensor controlling the supply of aggregate from the aggregate hoppers to the aggregate storage units by means of the crane on the crane platform.

7. The device according to one of the preceding claims, wherein the concrete plant (2) is further equipped with, - one or more aggregate storage units (4), - a buffer mixer (5), - a technical room (6), - an office (7), - a mixing tower (8), - a concrete pump (10) with a receiving hopper (9), said concrete pump (10) being connected to a buffer tank on the quay (13), - water distribution means (15), water receiving means (16) characterized in that said buffer mixer (5) is equipped with one or more sensors for measuring the quantity of concrete mortar present.

8. The device according to the preceding claim 7, characterized in that said sensors comprise at least one level height sensor.

9. The device according to one of the preceding claims 7 to 8, characterized in that the concrete plant (2) is connected to said water tank (12) via a cleaning water recovery system (14).

10. The device according to one of the preceding claims, characterized in that the water used in the concrete plant is at least partially recovered under the bridge.

11. A method of producing a concrete mortar, characterized in that the concrete mortar is produced by means of a floating device according to one of claims 1-10.

12. A use of the device according to one of claims 1 to 10 for the production of a concrete mortar.

13. The use of the device according to one of claims 1 to 10 for the production of a concrete mortar, characterized in that it is at least partially automated.

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