SUPERSTRUCTURE FOR A TRAFFIC SURFACE, METHOD OF MANUFACTURING THE SUPERSTRUCTURE

Abstract

A superstructure for a traffic surface is provided, the superstructure including a base layer of a mastic asphalt, and an intermediate layer of a porous asphalt arranged on the base layer, wherein the base layer seals a lower side of the intermediate layer at least in a liquid-tight manner. The superstructure comprises a top layer of a mastic asphalt arranged on the intermediate layer, wherein the top layer seals an upper side of the intermediate layer at least in a liquid-tight manner. The superstructure includes at least one sealing wall of a mastic asphalt arranged on at least one side surface of the intermediate layer, wherein the at least one sealing wall connects the base layer to the top layer and seals the at least one side surface in at least a liquid-tight manner. A method for manufacturing the superstructure is also provided.

Claims

1. A superstructure for a traffic surface, the superstructure comprising: a. a base layer of a mastic asphalt, b. an intermediate layer of a porous asphalt arranged on the base layer, wherein the base layer seals a lower side of the intermediate layer at least in a liquid-tight manner, c. a top layer of a mastic asphalt arranged on the intermediate layer, the top layer sealing an upper side of the intermediate layer at least in a liquid-tight manner, and d. at least one sealing wall of a mastic asphalt arranged on at least one side surface of the intermediate layer, the at least one sealing wall connecting the base layer to the top layer and sealing the at least one side surface at least in a liquid-tight manner, wherein e. the mastic asphalt of the top layer contains graphite in a proportion by mass of 1.25% to 5% of the mastic asphalt of the top layer.

2. The superstructure according to claim 1, wherein the superstructure additionally comprises at least one connecting part arranged at least partially in the at least one sealing wall for at least liquid-conducting connection of a fluid line for a heat transport fluid to the intermediate layer, an outer side of the connecting part being connected in at least liquid-tight manner to the at least one sealing wall.

3. The superstructure according to claim 2, wherein the superstructure additionally comprises a distribution pipe arranged in the intermediate layer and connected to the connecting part in at least a fluid-conducting manner for distributing the heat transport fluid introduced into the intermediate layer through the connecting part in the intermediate layer.

4. The superstructure according to claim 1, wherein the mastic asphalt of the base layer and/or of the at least one sealing wall a. contains basalt and/or slag as aggregate and/or b. has a maximum grain diameter of 2 mm to 24 mm.

5. The superstructure according to claim 1, wherein the porous asphalt of the intermediate layer a. has a maximum grain diameter of 4 mm to 32 mm and/or b. contains cellulose fibers with a mass fraction of 0.04% to 4% of the porous asphalt.

6. The superstructure according to claim 1, wherein the porous asphalt of the intermediate layer contains carbon fibers with a mass fraction of 0.01% to 1% of the porous asphalt, the carbon fibers having a fiber length of 1 mm to 20 mm and/or a tensile strength of 5 GPa to 6 GPa.

7. The superstructure according to claim 1, wherein the mastic asphalt of the top layer a. contains an aggregate with high thermal conductivity, quartzite or graywacke, as aggregate, b. has a maximum grain diameter of 2 mm to 32 mm and/or c. contains graphite with a mass fraction of 2.5% of the mastic asphalt of the top layer.

8. The superstructure according to claim 1, wherein the base layer comprises a sealing layer arranged on an upper side and/or on a lower side of the base layer, the sealing layer sealing the upper side and/or the lower side of the base layer at least in a liquid-tight manner, the sealing layer comprising one or more mastic asphalt layers, a bitumen-impregnated fleece and/or a bitumen welding sheet.

9. The superstructure according to claim 1, wherein the base layer is arranged on an asphalt carrying layer with a bitumen mass content of 4% to 5%.

10. A method of manufacturing the superstructure according to claim 1, the method comprising: a. spreading the base layer of the superstructure, b. attaching the at least one sealing wall to the base layer, c. placing the intermediate layer of the superstructure on the base layer so that the at least one side surface of the intermediate layer is sealed by the at least one sealing wall, and d. applying the top layer of the superstructure at least to the intermediate layer.

11. The method according to claim 10, wherein a. the at least one sealing wall is applied to an upper side of the base layer and/or b. the top layer is applied to an upper side of the at least one sealing wall.

12. The method according to claim 10, wherein the method additionally comprises applying bituminized chippings, namely a. on the upper side of the base layer that has not yet cooled down before the at least one sealing wall is applied to the upper side and/or b. on the upper side of the at least one sealing wall that has not yet cooled down before the top layer is applied to the upper side.

13. The method according to claim 10, wherein the application of the top layer is carried out at a temperature of the mastic asphalt of the top layer of 220° C. to 230° C. and/or a. includes rolling of the top layer with chippings.

14. The method according to claim 10, wherein spreading the base layer and/or attaching the at least one sealing wall is carried out at a temperature of the mastic asphalt of the base layer and/or of the at least one sealing wall of 200° C. to 230° C.

15. The method according to claim 10, wherein the method additionally comprising: a. creating an opening through the at least one sealing wall, b. inserting a connecting part into the opening, such that the connecting part is arranged for at least fluid-conducting connection of a fluid line to the intermediate layer, c. connecting an outer side of the connecting part to the at least one sealing wall at least in a liquid-tight manner, and d. at least fluid-conducting connection of the fluid line to the connecting part.

Description

BRIEF DESCRIPTION

[0120] Some of the embodiments will be described in detail, with references to the following Figures, wherein like designations denote like members, wherein:

[0121] FIG. 1 shows a schematic cross-section of a superstructure according to embodiments of the invention;

[0122] FIG. 2 shows a schematic cross-section through a superstructure according to embodiments of the invention and its supply with the heat transport fluid;

[0123] FIG. 3 shows an enlarged section of FIG. 2 in the area of the control fluid column; and

[0124] FIG. 4 shows the section of FIG. 3 with an alternative design of supplying the superstructure with the heat transport fluid.

DETAILED DESCRIPTION

[0125] FIG. 1 shows a schematic cross-section through a superstructure 100 according to embodiments of the invention.

[0126] The superstructure 100 shown includes a base layer 110, for example having a thickness of 3 cm to 5 cm, of a mastic asphalt, for example having a maximum aggregate diameter of 8 mm or 11 mm and having basalt as aggregate.

[0127] The superstructure 100 shown comprises an intermediate layer 120 arranged on the base layer 110, for example with a thickness of 6 cm, made of a porous asphalt, wherein the base layer 110 seals a lower side 123 of the intermediate layer 120 at least in a liquid-tight manner. The porous asphalt has, for example, a maximum grain diameter of 16 mm and contains a mass fraction of 0.1% carbon fibers and 0.4% cellulose fibers. The carbon fibers have, for example, a fiber length of 3 mm to 10 mm with an average fiber length of 5 mm and a tensile strength of 5 GPa to 6 GPa.

[0128] The superstructure 100 shown comprises a top layer 130 arranged on the intermediate layer 120, for example with a thickness of 3 cm, made of a mastic asphalt, the top layer 130 sealing an upper side 121 of the intermediate layer 120 at least in a liquid-tight manner. The mastic asphalt of the top layer 130 contains, for example, quartzite as aggregate and a mass fraction of 2.5% graphite.

[0129] The superstructure 100 shown comprises at least one sealing wall 140 arranged on at least one side surface 122a, 122b, in the drawing on a left side surface 122a and on a right side surface 122b, of the intermediate layer 120, for example with a width of 20 cm to 30 cm, made of a mastic asphalt, the sealing wall 140 connecting the base layer 110 to the top layer 130 and sealing the at least one side surface 122 at least in a liquid-tight manner. The mastic asphalt of the sealing wall 140 contains, for example, basalt with a maximum grain diameter of 5 mm as aggregate.

[0130] The superstructure 100 shown comprises at least one connecting part 145 arranged at least partially in the at least one sealing wall 140 for at least fluid-conducting connection of a fluid line 150 for a heat transport fluid to the intermediate layer 120, wherein an outer side 146 of the connecting part 145 is connected to the at least one sealing wall 140 in at least a liquid-tight manner.

[0131] FIG. 1 shows two connecting parts 145, one of which can serve, for example, as an inlet for the heat transport fluid into the intermediate layer and the other as an outlet for the heat transport fluid from the intermediate layer.

[0132] The base layer 110 shown includes a sealing layer 115 disposed on a lower side 113 of the base layer 110, the sealing layer 115 sealing the lower side 113 of the base layer 110 in at least a liquid-tight manner, the sealing layer 115 comprising, for example, a bituminous welding sheet.

[0133] The base layer 110 shown is placed on an asphalt carrying layer 160, for example with a bitumen mass content of 4.5%. The asphalt carrying layer 160 can be a conventional asphalt carrying layer AC 22 T S according to ZTV Asphalt-StB. The asphalt carrying layer 160 contains, for example, basalt as aggregate.

FIG. 2

[0134] FIG. 2 shows a schematic cross-section through a superstructure 100 according to embodiments of the invention and its supply with the heat transport fluid.

[0135] The superstructure 100 shown may be configured, for example, as shown in FIG. 1, although not all features of the superstructure 100 are shown and labeled for clarity.

[0136] Some dimensions are exemplarily dimensioned in meters in FIG. 2.

[0137] The intermediate layer 120 of the superstructure 100 is supplied with the heat transport fluid (shown by arrows), for example water, through fluid lines 150 connected to the connecting parts 145 of the superstructure. For example, the connecting part 145, through which the heat transport fluid is introduced into the intermediate layer 120 (on the right in FIG. 2), can be arranged as shown in FIG. 2 higher than the connecting part 145, through which the heat transport fluid is removed from the intermediate layer 120 (on the left in FIG. 2).

[0138] For example, the heat transfer fluid is pumped by a pump 180 from a reservoir 170 through a fluid line 150 into the intermediate layer 130 and returned through another fluid line 150 from the intermediate layer 130 into the reservoir 170.

[0139] The fluid line 150 feeding to the intermediate layer 130 may have a flow meter and/or pressure gauge 152 for measuring the flow of the heat transport fluid into the intermediate layer 130 and/or for measuring the pressure of the heat transport fluid in the fluid line 150 and/or a valve 151, in particular a flow control valve, for regulating the flow.

[0140] The fluid line 150 feeding to the intermediate layer 130 may include a control fluid column 190 for controlling the pressure in the fluid line 150 and/or a pressure control valve 202 for adjusting the pressure in the fluid line 150.

[0141] The control fluid column 190 includes an overflow 192 through which the heat transfer fluid drains into the reservoir 170 when a maximum pressure is exceeded. To set the maximum pressure, the overflow 192 is adjustable in height above the fluid line 150 (indicated by dashed lines).

[0142] In an embodiment, the pressure control valve 202 includes a relief drain 201 through which excess heat transfer fluid is returned to the reservoir 170.

[0143] FIG. 3 shows an enlarged section of FIG. 2 in the area of the control fluid column 190.

[0144] The control fluid column 190 may include an adjustable length riser tube 191 for the heat transfer fluid from the fluid line 150 to adjust the height of the overflow 192 above the fluid line 150.

[0145] FIG. 4 shows the section of FIG. 3 with an alternative embodiment of supplying the superstructure 100 with the heat transport fluid. In this embodiment, instead of the pressure control valve 202 with relief drain 201, a pressure reducer 200 is provided to adjust the pressure in the fluid line 150.

[0146] Although the invention has been illustrated and described in greater detail with reference to the exemplary embodiment, the invention is not limited to the examples disclosed, and further variations can be inferred by a person skilled in the art, without departing from the scope of protection of the invention.

[0147] For the sake of clarity, it is to be understood that the use of “a” or “an” throughout this application does not exclude a plurality, and “comprising” does not exclude other steps or elements.

LIST OF REFERENCE SIGNS

[0148]

TABLE-US-00001 100 Superstructure 110 Base layer 113 Lower side of the base layer 115 Sealing layer 120 Intermediate layer 121 Upper side of the intermediate layer 122a, 122b Side surface of the intermediate layer 123 Lower side of the intermediate layer 130 Top layer 140 Sealing wall 141 Upper side of the sealing wall 145 Connecting part 146 Outer side of the connecting part 150 Fluid line 151 Valve 152 Flow meter and/or pressure gauge 160 Asphalt carrying layer 170 Resevoir 180 Pump 190 Control fluid column 191 Riser pipe 192 Overflow 200 Pressure reducer 201 Relief drain 202 Pressure control valve