• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Disclosed is an apparatus for forming and sealing a contraction joint in concrete pavements. The apparatus comprises a forming unit. The forming unit comprises a cutting device configured to provide a cut of contraction joint. The forming unit comprises a chamfering device configured to provide chamfered edges of the contraction joint. The apparatus comprises a sealing unit. The sealing unit comprises a backstop feeding device configured to provide a backstop in the contraction joint. The sealing unit comprises a priming device configured to provide a primer in the contraction joint. The sealing unit comprises a sealing device configured to provide a sealant in the contraction joint.
    公开号:DK201970355A1
    申请号:DKP201970355
    申请日:2019-05-31
    公开日:2020-12-22
    发明作者:Bille Flemming；Willem De Waal Malefijt Bernard
    申请人:FUGEBILLEN ApS；Innomas；
    IPC主号:
    专利说明:

    APPARATUS FOR FORMING AND SEALING A CONTRACTION JOINT
    FIELD OF THE INVENTION The present disclosure relates to forming and sealing contraction joints for concrete pavements.
    More specifically, the present disclosure pertains to the field of an apparatus for forming and sealing contraction joints for concrete pavements, such as an apparatus comprising a forming unit and a sealing unit.
    BACKGROUND OF THE INVENTION Concrete pavements have major advantages in terms of costs and durability compared with other pavement solutions such as asphalt.
    Concrete pavements are used for making roads, motorways, airstrips and parking areas. The concrete is casted by pouring concrete and forming a concrete slab in a single operation over a predefined width and length. The width of a motorway may typically be 11-15 meters, e.g. three lanes of 4 meters width and an emergency lane of 3 meters width. The length may be several hundreds of meters.
    Due to the exotherm reaction during curing of casted concrete, the concrete reduces in size due to creep and thermal movement. The shrinking of the concrete will generate cracks and if uncontrolled, the cracks will appear at undesired locations.
    In order to remedy cracking at random locations, contraction joints may be placed in predetermined locations. The contraction joints become weakened planes where the concrete will form a crack below the pavement surface. Contraction joints are normally made in at least two instances. A first pre-cut groove is made when the concrete is still fresh and before the cracks has a chance to occur, typically within the first 4-12 hours after the concrete has been poured. If the concrete is allowed to set before the first pre-cut groove is made, the cutting process will be more difficult to control, and a clean cut is more difficult to obtain. The pre-cut groove is normally a narrow joint made by cutting in the fresh concrete and has a depth of at least % the thickness of the slab. The pre-cut groove will be expanded by cutting to a desired contraction joint in terms of width as soon as the concrete can withstand the weight of the machine. The width of the contraction joints may be approximately 12 mm for concrete pavements in the airport and approximately 9 mm for concrete pavements on the motorway. The contraction joints need to be sealed for protection against liquid and consequential damages caused by frost.
    Previous methods for manufacturing concrete pavements and contraction joints are tedious and inefficient, because they require multiple process steps.
    SUMMARY OF THE INVENTION It is an object of the present disclosure to provide an apparatus and a system comprising a plurality of apparatuses for forming and sealing a contraction joint and a method for forming and sealing a contraction joint, which overcomes at least some of the disadvantages of the prior art. In particular, it is an object of the present invention to provide an apparatus and a system comprising a plurality of apparatuses for forming and sealing a contraction joint and a method for forming and sealing a contraction joint, which increases accuracy of forming the contraction joint as well as facilitating decreased manufacturing time. Accurately positioning the apparatus may — further decrease manufacturing variations and save cost related to uncontrolled application of the primer and the sealer.
    Thus, the present disclosure relates to an apparatus for forming and sealing a contraction joint in concrete pavements. The apparatus comprises a forming unit. The forming unit comprises a cutting device configured to provide a cut of contraction joint. The forming unit comprises a — chamfering device configured to provide chamfered edges of the contraction joint.
    The apparatus comprises a sealing unit. The sealing unit comprises a backstop feeding device configured to provide a backstop in the contraction joint. The sealing unit comprises an optional priming device configured to provide a primer in the contraction joint. The sealing unit comprises a sealing device configured to provide a sealant in the contraction joint.
    — Also disclosed is a method for forming and sealing a contraction join in concrete pavements with an apparatus. The method comprises forming the contraction joint. Forming the contraction joint comprises cutting a contraction joint with a cutting device. Forming the contraction joint comprises chamfering the edges of the contraction joint with a chamfering device.
    DK 2019 70355 A1 3 The method comprises sealing the contraction joint.
    Sealing the contraction joint comprises providing a backstop in the contraction joint with a backstop feeding device.
    Sealing the contraction joint optionally comprises providing a primer in the contraction joint with a priming device.
    Sealing the contraction joint comprises providing a sealant in the contraction joint with a sealing device.
    It is an advantage of the present disclosure that forming and sealing is performed by the same apparatus within a short time frame, as the process becomes less dependent on weather conditions.
    It is a further advantage that forming and sealing is performed by the same apparatus, as a more accurate placement of the cuts and the backstop, primer and sealer can be made, thus providing a contraction joint of better and more uniform quality.
    Providing a primer and the primer device may be optional, as the sealant may be able to provide a strong attachment to the concrete in the walls of the contraction joint even without the primer.
    The process of sealing is controlled by having the apparatus move at a predefined velocity and applying the primer and/or the sealer with a predetermined pressure from the priming device and/or the sealing device.
    It is an advantage of the present disclosure that the process of sealing is controlled, reducing over consumption of primer and sealer.
    Cutting and chamfering may be performed by concrete cutting blades, such as diamond blades.
    Several cutting blades may be combined to a cutting wheel with the desired dimensions.
    Cutting and chamfering may be performed by separate blades on the same wheel.
    Alternatively, cutting and chamfering may be performed by separate cutting blades and/or wheels on two separate axes.
    Alternatively, the priming device may be configured to provide a priming element.
    Alternatively, the sealing device may be configured to provide a sealing element or a sealing agent.
    The forming unit may comprise a fluid jet device providing fluid to the forming unit.
    The fluid jet device may provide fluid for the forming process, e.g. wet cutting.
    By providing fluid in the forming process, the cutting blade is cooled down and dust accumulated during forming is reduced and formed into sludge, which can better be controlled.
    By controlling the dust, the exposure to dust is reduced, making the process much safer for the operator of the apparatus, reducing health risks, and the environment reducing potentially dangerous situations due to dust
    DK 2019 70355 A1 4 on airplane engines or dust on the motorway lines nearby. The fluid jet device may be located right before the forming unit, above or right after the forming unit. The apparatus may comprise a cleaning unit configured to clean sludge accumulated from cutting the contraction joint. The cleaning unit may comprise a suction device configured for removing sludge accumulated from cutting the contraction joint. The cleaning unit may comprise a fluid jet device providing fluid in the cleaning process. The cleaning unit may clean in the contraction joint and around the contraction joint, such as on the concrete pavement. The suction device may be a vacuuming device. The suction device may suction in the contraction joint and around the contraction joint, such as on the concrete pavement. By providing fluid in the cleaning process — when cleaning in and around the contraction joint health and environmental risks related to accumulation of dust is reduced. By cleaning the contraction joint after forming, thereby removing all excess sludge, the quality of the sealing process is improved. The cleaning unit may comprise an additional suction device after the fluid jet device configured to suction the sludge formed by the fluid jet device.
    The apparatus may comprise a drying unit configured to dry up the contraction joint. The drying unit may comprise a gas turbine jet configured to blow hot exhaust gases. The drying unit may blow hot exhaust gases into the contraction joint and around the contraction joint, such as on the concrete pavement. The drying unit dries the contraction joint and the area around the contraction joint. The drying unit may be configured to operate between 30°C-500°C, such as 50°C-250°C, such as 200°C. The drying unit may be configured to heat up the concrete pavement and the contraction joint, such as up to 80°C, such as 50°C-60°C. The advantage of drying with a gas turbine jet, is that the concrete is more effectively dried compared with only suctioning.
    The apparatus may comprise an alignment device configured to align the apparatus with the contraction joint. The alignment device may comprise a first sensor. The alignment device may comprise a second sensor. The first sensor may be located at the front of the apparatus. The second sensor may be located at the back of the apparatus. The alignment device is configured to align the forming unit and/or the sealing unit with the pre-cut groove of the contraction joint, so that forming, i.e. cutting and chamfering, and the sealing, i.e. providing a backstop, and optional primer and a sealant, are performed at the correct locations. The sensors first sensor and/or the second sensor may be configured to send a signal, detect a signal and recognize the contraction joint in the detected signal in order to verify that the apparatus is aligned correctly over the
    DK 2019 70355 A1 contraction joint. The first sensor may be connected to steering means, such that, if the sensor detects a misalignment, the apparatus can be steered to align to the pre-cut groove. It is an advantage that the apparatus can steer the apparatus based on signals from an alignment device, providing a more accurate result and reduces the manual work load of the operators.
    5 The sealing unit may comprise an optional heating device configured to heat and ventilate the primer element. The heating device may be configured to operate between 30°C-500°C, such as 5°C-250°C, such as 50°C-150°C, such as 50°C-100°C. The heating device may be optional, as the drying unit may already have heated the concrete to the desired temperature. The drying unit may thus have a double function.
    — The material of the backstop may comprise polyethylene foam. Alternatively, the backstop may comprise any compressible material. The backstop may have a form of a cord, rope, ribbon, strip or the like. The cross section of the back stop may be circular. Alternatively, the cross section of the backstop may be shaped as a square. The backstop feeding device may provide a backstop into the contraction joint. The backstop feeding device may comprise a cable drum or a cylinder with the backstop rolled up around the cylinder or drum. Providing the backstop may comprising feeding the backstop continuously.
    The material of the primer may comprise polyurethane or epoxy. The material of the sealant may comprise an elastomer. The material of the sealant may comprise an elastomer and polysulfide, such as 30 % polysulfide.
    The apparatus may be arranged and configured to carry out the steps in the following order: form a contraction joint with a forming unit and seal the contraction joint with a sealing unit. The forming unit and sealing unit may be are arranged in-line on the apparatus. The forming unit may be located in front of the sealing unit on the apparatus. The apparatus may be arranged and configured to carry out the steps in the following order: cut a contraction joint; chamfer the edges of the contraction joint; clean the contraction joint; dry the contraction joint; provide a backstop in the contraction joint; optionally provide a primer in the contraction joint; optionally heat the primer; provide a sealant in the contraction joint.
    The apparatus may comprise a frame. The apparatus may comprise wheels. The wheels may be attached to the frame.
    DK 2019 70355 A1 6 The apparatus may comprise a process control unit.
    The process control unit may be located between the drying unit and the backstop feeding device.
    Alternatively, the process control unit may be located between the backstop feeding device and the priming device.
    The process control unit may also be located at other places.
    The apparatus may comprise several process control units located at different locations on the apparatus.
    The process control unit may comprise a device to measure temperature, e.g. a thermometer, to control the temperature of the concrete pavement before the backstop is fed or before the primer is applied and to ensure that the temperature of the concrete pavement is not too high.
    The process control unit may comprise a device to measure humidity, such as a spectrometer, to ensure that the concrete pavement is dry after the drying unit.
    The process control unit may comprise a device for inspecting the contraction joint, e.g. a camera.
    The camera may be used to inspect whether the backstop is fed into the contraction joint correctly.
    By providing a process control unit the quality of the contraction joint is enhanced.
    Also disclosed is a system comprising a plurality of apparatuses.
    The plurality of apparatuses is arranged with a mutual spacing for forming and sealing a plurality of substantially parallel contraction joints.
    The apparatuses may be connected to a vehicle.
    The apparatuses may be arranged on a frame with wheels.
    Alternatively, the apparatuses may be arranged on a frame without wheels.
    The frame may be connected to a vehicle.
    The frame may have an apparatus connector connecting the apparatus to the vehicle.
    The vehicle may pull the frame with wheels.
    Alternatively, the vehicle may transport the frame, such that the frame hovers over the concrete pavement.
    The apparatuses may create continuous, parallel contraction joints along a concrete pavement.
    Alternatively, the system comprises a plurality of apparatuses.
    The apparatuses are arranged with a mutual spacing for forming and sealing a plurality of substantially parallel contraction joints.
    The apparatuses may be incorporated into a vehicle.
    The apparatuses may be connected to a system frame through two system poles on each side of each apparatus.
    The system poles may be threaded poles, or pneumatic or hydraulic cylinders.
    The system poles may be configured to move the apparatus transversely over the concrete pavement.
    The apparatuses in the system may be able to form and seal contraction joints in the transverse direction of the concrete pavement. The apparatuses in the system may be able to form and seal contraction joints in the longitudinal direction of the concrete pavement. The system rack may comprise means for securing the system rack to the ground. The system rack may comprise wheels for moving the system rack to the next location by pulling the system rack with a vehicle.
    The system rack may be connected to the vehicle through the vehicle connection bar. It is an advantage of the present disclosure that a plurality of apparatuses can form and seal contraction joints in a parallel manner, reducing cost in manhours and energy consumption of the apparatuses needed to manufacture contraction joints. In addition, the system is able to manufacture contraction joints faster than the conventional method, reducing downtime of the area being under construction.
    BRIEF DESCRIPTION OF THE FIGURES Embodiments of the disclosure will be described in more detail in the following with regard to the accompanying figures. The figures show one way of implementing the present invention and are not to be construed as being limiting to other possible embodiments falling within the scope of the attached claim set. Fig. 1 is a schematic diagram illustrating a concrete pavement, Fig. 2 is a schematic diagram illustrating a contraction joint, Fig. 3a-3f is a schematic diagram illustrating a contraction joint, Fig. 4a is a schematic diagram illustrating an apparatus, Fig. 4b is a schematic diagram illustrating an apparatus, Fig. 5 is a schematic diagram illustrating a system with a plurality of apparatuses, Fig. 6 is a schematic diagram illustrating a system with a plurality of apparatuses, and Fig. 7 is a schematic diagram illustrating a method for forming and sealing a contraction joint. It is envisaged that any embodiments or elements as described in connection with any one aspect may be used with any other aspects or embodiments, mutatis mutandis.
    DK 2019 70355 A1 8
    DETAILED DESCRIPTION Fig. 1 is a schematic diagram illustrating a concrete pavement, such as a motorway, an airstrip or an airport apron on tarmac. To avoid cracks in the concrete pavement 2, contraction joints are made in the transverse direction and the longitudinal direction dividing the concrete pavement into panels 3. Fig. 2 is a schematic diagram illustrating the purpose of a contraction joint 10. The contraction joint 10 is located in a concrete pavement 2 and is seen in a cross section. The contraction joint 10 directs a crack 12 to form below the joint by creating a weakened plane, thereby preventing cracks from forming at random locations.
    Fig. 3a-3f are schematic diagrams illustrating a contraction joint 10 in a concrete pavement 2 seen in a cross section. Fig 3a-3f illustrates the method for forming and sealing a contraction joint 10 in concrete pavements 2. The method may be performed by an apparatus, such as the apparatus in Fig. 4a and Fig. 4b.
    Fig. 3a illustrates the pre-cut groove 8 of the contraction joint 10, which is made with a sawcut — within typically 4-20 hours after the concrete slab has been poured. The pre-cut groove 8 must be made while the concrete is still fresh and soft, but before cracks occur. The pre-cut groove 8 has a depth of at least J of the height of the concrete slab in the vertical direction. Otherwise the joint is not deep enough to create a wakened plane. The width of the pre-cut groove 8 is typically 4 mm.
    Fig. 3b illustrates a contraction joint 10 with a pre-cut groove 8 and a main cut section 9. The main cut section is made by cutting into the pre-cut groove 8 with a cutting device after the concrete pavement has at least partially cured. Curing typically takes 30-60 days, depending on the weather. The contraction joint is formed by making a pre-cut groove and subsequently a main cut, because it is difficult to cut the main cut while the concrete is still fresh and moving.
    Fig. 3c illustrates the contraction joint 10 with a chamfering section 11. The chamfering section 11 provides more rounded edges to the contraction joint 10, as the process of making the main cut 9 leaves the contraction joint 10 with very sharp edges (such as in Fig. 3b), which can be damaging for anything running over the concrete pavement 2. Furthermore, the edges are relatively weak and may break off when for instance shuffling snow accumulated on the concrete pavement 2.
    The chamfering section 11 is made with a chamfering device.
    DK 2019 70355 A1 9 Fig. 3d illustrates the contraction joint 10 with a backstop 60 placed into the main cut section 9 with a backstop feeding device. The backstop 60 provides a stop for the sealant and makes sure that the space over the backstop 60 corresponds to the optimal size of the sealant once it is applied to the contraction joint 10. The backstop may comprise polyethylene foam. Alternatively, — the backstop may comprise any compressible material. The backstop may be formed as a cord, rope, ribbon, strip or the like.
    Fig. 3e illustrates the contraction joint 10 with a backstop 60 and a primer 62. The primer 62 is applied with a priming device and provides a surface where the sealant better sticks to.
    Fig. 3f illustrates the contraction joint 10 with a backstop 60, a primer 62 and a sealant 64 on top of the primer. The sealant 64 is applied with a sealing device. Alternatively, a joint sealant may be used instead of the combination of primer 62 and sealant 64.
    Fig. 4a is a schematic diagram illustrating an apparatus 20. The apparatus 20 comprises a forming unit 33 and a sealing unit 41. The forming unit 33 forms the contraction joint 10. The sealing unit 41 seals the contraction joint, preventing dirt and liquid form entering the joint.
    The forming unit 33 comprises a cutting device 34 for cutting the contraction joint 10. The cutting unit 34 may be configured to cut in a pre-cut groove. The forming unit 33 comprises a chamfering device 35 for chamfering the edges of the contraction joint 10 made by the cutting device 34. Cutting and chamfering may be performed simultaneously. The cutting device 34 and chamfering device 35 are illustrated as a combined device, but they may as well be two separate devices on the apparatus 20. The cutting device 34 and the chamfering device 35 may be arranged in-line on the apparatus 20. The cutting device 34 and/or the chamfering device 35 may be concrete cutting blades, such as diamond blades. The cutting device rotates in a clockwise direction r according to Fig. 4a. The apparatus moves in a direction m to the left according to Fig. 4a.
    The forming unit 33 may further comprise a first fluid jet device 32 providing fluid for the forming process, e.g. wet cutting. By providing fluid in the forming process, the cutting blade is cooled down and dust accumulated during forming is reduced and formed into sludge, which can better be controlled. By controlling the dust, the exposure to dust is reduced, making the process much safer for the operator of the apparatus, reducing health risks, and the environment reducing potentially dangerous situations due to dust on airplane engines or dust on the motorway lines
    DK 2019 70355 A1 10 nearby. The fluid jet device 32 may be located right before the forming unit 33, such as in Fig. 4a, or above or right after the forming unit 33. The apparatus 20 comprises an alignment device 30, 50. The alignment device may comprise a first sensor 30 and a second sensor 50. The first sensor 30 may be located at the front of the apparatus 20. The second sensor 50 may be located at the back of the apparatus 20. The alignment device 30, 50 is configured to align the forming unit 33 and/or the sealing unit 41 with the pre-cut groove (see. Fig. 3a) of the contraction joint 10, so that the main cut and the sealing is performed at the correct location. The sensors 30, 50 may send a signal, detect a signal and recognize the contraction joint 10 in the detected signal in order to verify that the apparatus 20 is aligned correctly over the contraction joint 10. The sensor 30 may be connected to steering means, such that, if the sensor 30 detects a misalignment, the apparatus can be steered to align to the pre-cut groove.
    The apparatus 20 comprises at least one cleaning unit 31, 37 configured to clean the sludge in and around the contraction joint 10 accumulated from the cutting unit 33. The first cleaning unit 31 may comprise a suction device 31, the second cleaning unit 37 may comprise a second suction device 36 and a third suction device 39. The first cleaning unit 31 may be located before the forming unit 33. The second cleaning unit 37 may be located after the forming unit 33. The first suction device 31 and the second suction device 36 sucks the sludge accumulated from the forming device 33.
    The apparatus 20 comprises a second cleaning unit 37. The second cleaning unit comprises a second fluid jet device 38 configured for providing fluid, such as clean water, to clean around and in the contraction joint 10. The third suction device 39 is configured to suck the fluid from the second fluid device 38.
    The apparatus comprises a drying unit 40 configured for drying in and around the contraction — joint. The drying unit 40 may be a gas turbine jet configured to blow hot exhaust gases around, and in, the contraction joint 10, thereby drying the area. In addition, the drying unit 40 pre-heats the concrete. Alternatively, the drying unit may be an electrical dryer or a dryer using radiation. The apparatus 20 comprises a sealing unit 41. The sealing unit 41 comprises a backstop feeding device 42, a primer device 44 and a sealing device 48. The backstop feeding device 42 provides a backstop 60 into the contraction joint 10. The backstop feeding device may comprise a cable
    DK 2019 70355 A1 11 drum or a cylinder with the backstop rolled up around the cylinder or drum. The concrete pavement 2 should preferably cool, preferably to less than 95°C before the backstop 60 is fed into the contraction joint 10. At higher temperatures, the backstop might melt. The sealing unit 41 comprises an optional primer device 44. The primer device 44 may comprise a supply tank connected to a nozzle. The primer device 44 provides a primer to the surface of the contraction joint 10 and the backstop 60. The primer provides a better attachment surface for the sealant. The sealing unit 41 comprises an optional heating device 46 configured to evaporate the solvents from the primer applied by the priming device 44. By heating and ventilating the primer, the curing process is shortened, and the sealant may be applied within a shorter time range. The sealing unit 41 comprises a sealing device 48. The sealing device 48 may comprise a supply tank connected to a nozzle. The sealing device 48 provides a sealant on top of the backstop 60 and the surface of the contraction joint 10 and seals the contraction joint 10, preventing dirt and fluid from entering.
    — The apparatus 20 comprises a process control unit 51. The process control unit 51 may be located between the drying unit 40 and the backstop feeding device 42. Alternatively, the process control unit 51 may be located between the backstop feeding device and the priming device 44. However, the process control unit 51 may also be located at other places. The process control unit 51 is illustrated as one unit if Fig. 4a, however, the apparatus may comprise several process — control units located at different locations on the apparatus 20. The apparatus 20 comprises a frame 26 and wheels 22. The apparatus 20 comprises an apparatus connector 24, which can be connected to a vehicle (see. Fig. 5) pulling the apparatus 20 along a concrete pavement 2. The number of apparatuses 20 is not limited to three, as illustrated, but should be dependent on the width of the concrete pavement 2 and the desired width of the panels. In some circumstances, the drying unit 40 heats the concrete pavement 2 to a level, where the necessity for using the heating device 46 is reduced and even may be omitted. Tests have verified that the temperature is at a desired level after drying and during sealing. Further, tests have shown that the primer also may be omitted, as the sealant provides a sufficient, or even better,
    DK 2019 70355 A1 12 sealing than if a primer was applied before the sealant.
    Fig. 4b shows an embodiment without these units.
    The other features of the apparatus 20 are the same as in the apparatus 20 in Fig. 4a.
    Fig. 5 is a schematic diagram illustrating a system 70 with a plurality of apparatuses 20, such as the apparatus in Fig. 4a and Fig. 4b.
    The apparatuses 20 are connected to a vehicle 14 connection bar 18 with the apparatus connectors 24. The vehicle 14 has wheels 16 pulling the vehicle 15 and the apparatuses 20 forward, thereby enabling the apparatuses 20 to create continuous, parallel contraction joints 10 along a concrete pavement 2. Fig. 6 is a schematic diagram illustrating a system with a plurality of apparatuses 20, such as the apparatus in Fig. 4a and Fig. 4b.
    Each apparatus 20 is connected to a system frame 72 through two system poles 74 on each side of the apparatus 20. The system poles 74 may be threaded poles, pneumatic, hydraulic or mechanic cylinders.
    The system poles 74 are configured to move the apparatus 20 transversely on the concrete pavement 2, thus making contraction joints 10 in the transverse direction of the concrete pavement 2. The system rack 72 may comprise means for securing the system rack 72 to the ground.
    The system rack 72 may comprise wheels for moving the system rack 72 to the next location by pulling the system rack 72 with the vehicle 14. The system rack 72 is connected to the vehicle through the vehicle connection bar 18. Fig. 7 is a schematic diagram illustrating a method 200 for forming and sealing a contraction joint.
    The method may comprise aligning 202 the apparatus, wherein aligning 202 the apparatus comprises verifying the position of a first sensor and a second sensor relative to a pre-cut groove and the main cut of the contraction joint.
    The method may comprise providing fluid 204 from a fluid jet device to perform wet cutting.
    The method 200 comprises forming 205 the contraction joint, wherein forming 205 the contraction joint comprises cutting 206 a main cut section and chamfering 208 to form a chamfering section.
    Cutting 206 and chamfering 208 may be performed by concrete cutting blades, such as diamond blades.
    Several cutting blades may be combined to a cutting wheel with the desired dimensions.
    Cutting 206 and chamfering 208 may be performed by separate blades on the same wheel.
    Alternatively, cutting 206 and chamfering 208 may be performed by separate cutting blades and/or wheels on two separate axes.
    The method 200 may comprise cleaning 209 the contraction joint and the surrounding concrete pavement.
    Cleaning 209 may comprise providing fluid 210 form a fluid jet device and suctioning
    212 the fluid and remaining sludge. Suctioning may also be performed right after forming 205 and before providing fluid 210. The method 200 may comprise drying 214 the contraction joint and the surrounding concrete pavement. Drying 214 may comprise blowing hot exhaust gases with a gas turbine jet. Due to high temperatures of the exhaust gases, drying 214 the contraction joint and the surrounding concrete pavement causes the temperature of the concrete pavement to rise. The method 200 comprises sealing 215 the contraction joint. Sealing 215 the contraction joint comprises providing a backstop 216 with a backstop feeding device. The backstop feeding device may be a cable drum feeding the backstop when rolling the drum. Feeding the backstop is preferably done when the temperature of the concrete pavement is under 100°C, to avoid that that the backstop melts. Sealing 215 the contraction joint may optionally comprise providing 218 a primer with the priming device. Providing 218 a primer may comprise applying the primer with a nozzle connected to a supply tank with the primer.
    Sealing 215 the contraction joint may optionally comprise heating 220 the primer with a heating device to accelerate the curing process of the primer. Heating 220 the primer is optional Sealing 215 the contraction joint comprises providing 222 a sealant with the sealing device. Providing 222 a sealant may comprise applying the sealant with a nozzle connected to a supply tank with the sealant.
    It should be noted that the order of the steps of the method may be interchanged and/or some of the steps may be performed simultaneously. The invention has been described with reference to preferred embodiments. However, the scope of the invention is not limited to the illustrated embodiments, and alterations and modifications can be carried out without deviating from the scope of the invention.
    DK 2019 70355 A1 14
    LIST OF REFERENCES 2 concrete pavement 3 panel 4 longitudinal contraction joint 6 transverse contraction joint 8 pre-cut groove 9 main cut section contraction joint 10 11 chamfering section 12 induced crack 14 vehicle 16 vehicle wheel 18 vehicle connection bar apparatus 22 apparatus wheel 24 apparatus connector 26 apparatus frame 30 alignment device/first sensor 20 31 first cleaning unit/first suction device 32 first fluid jet device 33 forming unit 34 cutting device 35 chamfering device 36 second suction device 37 second cleaning unit 38 second fluid jet device 39 third suction device 40 drying unit 41 sealing unit 42 backstop feeding device 44 priming device
    DK 2019 70355 A1 15 46 heating device 48 sealing device 50 alignment device/second sensor 51 process control unit 60 backstop 62 primer 64 sealant 70 system 72 system rack 74 system pole D1 width of panel D2 length of panel m movement direction r rotation direction
    200 method 202 aligning 204 providing fluid 205 forming 206 cutting 208 chamfering 209 cleaning 210 providing fluid 212 suctioning 214 drying 215 sealing 216 providing backstop 218 providing primer 220 heating 222 providing sealant
    权利要求:
    Claims (15)
    [1] 1. An apparatus for forming and sealing a contraction joint in concrete pavements, the apparatus comprising: - a forming unit, the forming unit comprising: o a cutting device configured to provide a cut of contraction joint, o a chamfering device configured to provide chamfered edges of the contraction joint, - a sealing unit, the sealing unit comprising: o a backstop feeding device configured to provide a backstop in the contraction joint, o an optional priming device configured to provide a primer in the contraction joint, o a sealing device configured to provide a sealant in the contraction joint.
    [2] 2. Apparatus according to claim 1, wherein the forming unit comprises a fluid jet device providing fluid to the forming unit.
    [3] 3. Apparatus according to any of the preceding claims comprising a cleaning unit configured to clean sludge accumulated from cutting the contraction joint, e.g. wherein the cleaning unit comprises a suction device configured for removing sludge accumulated from cutting the contraction joint.
    [4] 4. Apparatus according any of the preceding claims comprising a drying unit configured to dry up the contraction joint, e.g. wherein the drying unit comprises a gas turbine jet configured to blow hot exhaust gases.
    [5] 5. Apparatus according to any of the preceding claims comprising an alignment device configured to align the apparatus with the contraction joint.
    [6] 6. Apparatus according to any of the preceding claims, wherein the sealing unit comprises a heating device configured to heat and ventilate the primer element, and wherein the heating device is configured to operate between 30°C and 500°C.
    DK 2019 70355 A1 17
    [7] 7. Apparatus according to any of the preceding claims, wherein the apparatus is arranged and configured to carry out the steps in the following order: - form a contraction joint with a forming unit, - seal the contraction joint with a sealing unit, wherein the forming unit and sealing unit are arranged in-line on the apparatus.
    [8] 8. A system comprising a plurality of apparatuses according to claims 1-7 arranged with a mutual spacing for forming and sealing a plurality of substantially parallel contraction joints, and wherein the apparatuses are connected to a vehicle.
    [9] 9. A system comprising a plurality of apparatuses according to claims 1-7 arranged with a mutual spacing for forming and sealing a plurality of substantially parallel contraction joints, and wherein the apparatuses are incorporated into a vehicle.
    [10] 10. A method for forming and sealing a contraction join in concrete pavements with an apparatus according to any of claims 1-0, the method comprising: - Forming the contraction joint, wherein forming the contraction joint comprises: o Cutting a contraction joint with a cutting device, o Chamfering the edges of the contraction joint with a chamfering device, - Sealing the contraction joint, wherein sealing the contraction joint comprises: o Providing a backstop in the contraction joint with a backstop feeding device, o Optionally providing a primer in the contraction joint with a priming device, o Providing a sealant in the contraction joint with a sealing device.
    [11] 11. Method according to claim 10, wherein forming the contraction joint comprises providing a fluid with a fluid jet device.
    [12] 12. Method according to any of the preceding claims comprising cleaning sludge accumulated from forming the contraction joint with a cleaning unit, e.g. wherein the cleaning unit comprises a suctioning device, and wherein cleaning the contraction joint comprises suctioning the sludge accumulated from cutting the contraction joint with a suctioning device.
    [13] 13. Method according to any of the preceding claims comprising drying up the contraction joint with a drying unit.
    [14] 14. Method according to claim 13, wherein the drying unit comprises a gas turbine jet and wherein drying the contraction joint comprises blowing hot exhaust gases.
    [15] 15. Method according to any of the preceding claims, wherein sealing the contraction joint comprises heating the primer with a heating device, and wherein the heating device is configured to operate between 30°C and 500°C.
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    同族专利:
    公开号 | 公开日
    DK180340B1|2020-12-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2020-12-22| PAT| Application published|Effective date: 20201201 |
    2020-12-22| PME| Patent granted|Effective date: 20201222 |
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA201970355A|DK180340B1|2019-05-31|2019-05-31|Apparatus for forming and sealing a contraction joint|DKPA201970355A| DK180340B1|2019-05-31|2019-05-31|Apparatus for forming and sealing a contraction joint|
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