CN218291487U - Asphalt pavement capable of removing ice and melting snow - Google Patents
Asphalt pavement capable of removing ice and melting snow Download PDFInfo
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- CN218291487U CN218291487U CN202123215386.2U CN202123215386U CN218291487U CN 218291487 U CN218291487 U CN 218291487U CN 202123215386 U CN202123215386 U CN 202123215386U CN 218291487 U CN218291487 U CN 218291487U
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Abstract
The utility model provides a can deicing bituminous paving who melts snow, belongs to road engineering technical field, sets gradually basic unit, thermal-insulated tie coat, phase change energy storage layer and surface course from supreme down, the phase change energy storage layer is for pouring into phase change temperature regulating material and sealed good heat pipe or the concrete layer that includes phase change temperature regulating material and pitch, thermal-insulated tie coat contains thermal insulation material and asphalt concrete. The asphalt pavement can solve the problems of road surface icing and snow accumulation in winter, and effectively avoids negative effects brought by traditional deicing and snow melting.
Description
Technical Field
The utility model belongs to the technical field of road engineering, more specifically relates to a bituminous paving that can deicing melt snow.
Background
In recent years, for the problem of snow and ice on the road surface, a great deal of research work is done by road traffic departments in various countries, and a plurality of methods for removing the snow and ice on the road are explored. These methods can be divided into: the road surface external snow removing technology and the road surface internal snow removing technology.
The external snow removal technology comprises a clearing method and a melting method, and mainly comprises the following steps: manual clearing method, mechanical clearing method, snow-melting agent spreading method, cable heating snow-melting ice-melting method and the like. Manual cleaning methods are inefficient and impact traffic, mechanical cleaning methods are expensive and have long idle periods. The snow melting agent spreading method is the most common and widely applied method, and countries in the world mainly melt the snow and ice by removing salt, however, salt spreading brings many negative effects to the concrete pavement structure and environment, such as steel bar corrosion, pavement stripping damage, environmental pollution and the like. In many countries in the world, severe damages to roads and bridges caused by using snow-removing salt are currently repaired at a high cost, and the economic loss is very large. The construction and layout of the cable heating snow-melting ice-melting method are difficult, and once the cable has problems, the maintenance work amount is large and the cost is high.
The internal snow removing technology comprises a thermal ice and snow melting technology and a freezing inhibition paving technology, the method has good melting effect, but a large amount of snow melting liquid (water or melting agent solution) is generated strictly to melt snow water, when the water enters a pavement structure, various water hazards are brought to an expressway, the adverse effect brought by using a snow melting agent is not eliminated, the method is large in energy consumption and can pollute the environment.
For example, patent publication No. CN208055805U, entitled snow-melting asphalt pavement structure with temperature rise and drop circulation effect of phase change material structure, includes: snow melt device, surface course, waterproof bonding layer, snow melt device sets up in the inside of surface course, and snow melt device is connected through the embedding mode with the surface course, waterproof bonding layer (3) set up in the both sides and the below of surface course, and the outlet setting is in the junction of waterproof bonding layer and surface course, and snow melt device is provided with N department altogether, and snow melt device becomes rectangular array form distribution in the inside of surface course, and the inside snow melt device of surface course establishes ties through high temperature resistant cable, and is connected through the electrical property between the terminal box of per two snow melt devices. There is then some negative impact of snow melting by electricity.
SUMMERY OF THE UTILITY MODEL
To the technical problem that above-mentioned exists, the utility model provides a but bituminous paving of deicing snow melt solves winter icy road and snow problem, also effectively avoids the negative effects that traditional deicing snow melt brought.
The utility model adopts the following specific technical proposal:
the utility model provides a but bituminous paving of deicing snow melt, sets gradually basic unit, thermal-insulated tie coat, phase change energy storage layer and surface course from supreme down, the heat pipe or the phase change concrete layer that phase change energy storage layer was for pouring into phase change thermoregulation material and sealed, phase change concrete layer contains the concrete layer of phase change thermoregulation material promptly, thermal-insulated tie coat is rubber asphalt concrete layer, and rubber asphalt concrete layer contains the asphalt concrete layer of thermal insulation material rubber promptly.
Preferably, the arrangement of the heat pipe in the horizontal plane can be a wavy pipe.
Preferably, the arrangement of the heat pipes in the horizontal plane can be two wavy opposite wavy pipes.
Preferably, the arrangement of the heat pipes on the horizontal plane can be that a plurality of criss-cross straight pipes are distributed in a net shape at equal intervals.
Preferably, the outer surface of the heat pipe is provided with threads or saw teeth, so that the heat pipe can be better bonded with an asphalt surface layer.
Preferably, the heat pipe is a copper pipe or an aluminum pipe, the inner diameter is 3-5cm, and the wall thickness is 2-4mm.
Preferably, the heat pipe is anchored to the thermal insulation adhesive layer.
Preferably, the heat insulation material is hydrogenated nitrile rubber or silicone rubber.
Preferably, the thickness of the heat insulation bonding layer is 0.5cm-1cm.
Preferably, the surface layer comprises asphalt concrete and SiO2 or graphite powder.
The beneficial effects of the utility model are that:
(1) The ice and snow on roads and bridges can be removed in time, the occurrence of traffic accidents is greatly reduced, the driving safety is ensured, the practicability is good, the road ice and snow removing device is particularly suitable for areas with ice and snow on roads in winter, and the popularization value is high;
(2) The problems of road surface damage, energy consumption and environmental pollution caused by manual snow removal are solved;
(3) The phase-change material is not lost, and the service life of the phase-change material is prolonged to a greater extent;
(4) The pavement performance of the surface layer cannot be influenced;
(5) The construction is convenient.
Drawings
FIG. 1 is a schematic structural view of a longitudinal section of a pavement structure according to a preferred embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the heat pipe shown in FIG. 1;
FIG. 3 is a schematic plan view of a preferred embodiment of the phase change energy storage layer of FIG. 1;
FIG. 4 is a schematic plan view of a preferred embodiment of the phase change energy storage layer in FIG. 1;
FIG. 5 is a schematic plan view of a preferred embodiment of the phase change energy storage layer shown in FIG. 1;
fig. 6 is a schematic longitudinal sectional structure view of a pavement structure according to another preferred embodiment of the present invention.
1. A surface layer; 2. a phase change energy storage layer; 3. a thermally insulating bonding layer; 4. a base layer.
Detailed Description
The invention will be further described with reference to specific examples. The starting materials and methods employed in the examples of the present invention are those conventionally available in the art and those conventionally used, unless otherwise specified.
In the description of the present invention, it is to be understood that the terms "center", "lateral", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", etc. indicate orientations or positional relationships based on those shown in fig. 1, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
In the description of the present invention, it should be further noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, or electrically connected; may be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Phase change material (PCM-phasechange material): means a substance that changes state of a substance with a change in temperature and can provide latent heat. The process of transforming physical properties is called a phase change process, where the phase change material absorbs or releases a large amount of latent heat. The phase change thermoregulation material in the application can be:
tetradecane (the phase change temperature is 2-5 ℃, and the phase change enthalpy is 205-218J/g); methyl laurate (phase transition temperature is 3-5 ℃, phase transition enthalpy is 150-170J/g); caprylic-capric acid (phase transition temperature is-13 to-3 ℃, phase transition enthalpy is 101 to 112J/g); crystalline hydrated salt LiClO3.3H2O (phase transition temperature 7-10 ℃, phase transition enthalpy 245-260J/g); paraffin C14H30 (phase change temperature 4-7 ℃, phase change enthalpy 220-230J/g).
Example 1
As shown in fig. 1, the asphalt pavement capable of removing ice and melting snow sequentially comprises a surface layer 1, a phase-change energy storage layer 2, a heat insulation bonding layer 3 and a base layer 4 from top to bottom, wherein the phase-change energy storage layer 2 is an asphalt layer containing a phase-change temperature-regulating material.
The asphalt is doped with a material with better heat insulation performance and bonding performance to serve as a heat insulation bonding layer 3, wherein 5% -20% of a heat insulation material such as hydrogenated nitrile butadiene rubber HNBR, silicon rubber and the like is doped into the asphalt, the thickness of the heat insulation bonding layer is 0.5cm-1cm, a phase change temperature regulating material with a higher enthalpy value is poured into a heat pipe (such as a copper pipe, an aluminum pipe and other metal materials with higher heat conductivity coefficient and higher strength and better corrosion resistance) to serve as a phase change energy storage device on the heat insulation bonding layer 3, and the phase change material is intensively placed in the heat pipe as shown in figure 2, so that the phase change material is prevented from directly contacting with the outside and is free of loss; the outer surface of the heat pipe is provided with threads or sawteeth, so that the heat pipe can be better bonded with an asphalt surface layer; the asphalt concrete is doped with materials with higher thermal conductivity coefficient (such as SiO2, graphite powder and the like) as a surface layer 1, and the surface layer is doped with 10% of SiO2.
The working principle is as follows: when the external temperature is higher, the surface layer 1 transfers heat to the phase change energy storage device, and the phase change material in the phase change energy storage device absorbs and stores the heat transferred from the surface layer 1; when the external temperature drops below the heat release critical temperature of the phase change material, the phase change material begins to release its stored heat. Therefore, the temperature of the road surface is kept within a certain temperature range, and the effect of automatically removing ice and melting snow is achieved. The main function of the heat insulation bonding layer 3 is to bond the phase change energy storage layer 2 and the base layer 4 well, and simultaneously prevent heat from being transferred to the base layer to damage the base layer 4.
On a road surface with a steep slope, as shown in fig. 3, the heat pipe of the present embodiment is arranged in the form of: the amplitude of the wavy pipe is slightly smaller than the road width, so that the heat pipe can be more conveniently placed.
This application is proven through the experiment, has better effect to the deicing snow melt of road surface or bridge floor, can realize road initiative deicing snow melt to a certain extent to practice thrift a large amount of manpowers, material resources, can effectively solve the various problems that are brought by traditional deicing mode.
Example 2
As shown in fig. 1, the asphalt pavement capable of removing ice and melting snow sequentially comprises a surface layer 1, a phase-change energy storage layer 2, a heat insulation bonding layer 3 and a base layer 4 from top to bottom, wherein the phase-change energy storage layer 2 is an asphalt layer containing a phase-change temperature-regulating material.
Materials with good heat insulation performance and bonding performance are doped into asphalt to serve as a heat insulation bonding layer 3, wherein 5% -20% of heat insulation materials are doped into the asphalt, such as hydrogenated nitrile butadiene rubber HNBR, silicon rubber and the like, and phase change temperature adjusting materials with high enthalpy are poured into heat pipes (such as metal materials including copper pipes, aluminum pipes and the like, and phase change materials in the heat pipes can be better protected) with high heat conductivity, high strength and good corrosion resistance to serve as phase change energy storage devices on the heat insulation bonding layer 3, and as shown in figure 2, the phase change materials are intensively placed in the heat pipes, so that the phase change materials are prevented from being in direct contact with the outside, and no loss exists; the outer surface of the heat pipe is provided with threads or sawteeth, so that the heat pipe can be better bonded with an asphalt surface layer; the asphalt concrete is doped with materials with higher heat conductivity coefficient (such as SiO2, graphite powder and the like) as a surface layer 1, and the surface layer is doped with 12 percent of graphite powder.
The working principle is as follows: when the external temperature is higher, the surface layer 1 transfers heat to the phase change energy storage device, and the phase change material in the phase change energy storage device absorbs and stores the heat transferred from the surface layer 1; when the external temperature drops below the exothermic critical temperature of the phase change material, the phase change material begins to release its stored heat. Therefore, the temperature of the road surface is kept within a certain temperature range, and the effect of automatically removing ice and melting snow is achieved. The main function of the heat insulation bonding layer 3 is to bond the phase change energy storage layer 2 and the base layer 4 well, and simultaneously prevent heat from being transferred to the base layer to damage the base layer 4.
On a road surface with a large camber, as shown in fig. 4, the heat pipe of the present embodiment is arranged in the form of: the amplitude of each heat pipe is slightly smaller than half of the road width, so that heat can be better and uniformly released.
This application is through experimental proof, has better effect to the deicing snow melt of road surface or bridge floor, can realize road initiative deicing snow melt to a certain extent to practice thrift a large amount of manpowers, material resources, can effectively solve the various problems brought by traditional deicing mode.
Example 3
As shown in fig. 1, the asphalt pavement capable of removing ice and melting snow sequentially comprises a surface layer 1, a phase change energy storage layer 2, a heat insulation bonding layer 3 and a base layer 4 from top to bottom, wherein the phase change energy storage layer 2 is an asphalt layer containing a phase change temperature adjusting material.
The method comprises the following steps of doping a material with good heat insulation performance and bonding performance into asphalt to serve as a heat insulation bonding layer 3, wherein the heat insulation bonding layer 3 is asphalt concrete doped with 5% -25% of heat insulation materials (such as hydrogenated nitrile butadiene rubber HNBR, silicon rubber and the like), the thickness of the asphalt concrete is 0.5cm-1cm, a phase change temperature adjusting material with a high enthalpy value is poured into a heat pipe (such as a copper pipe, an aluminum pipe and other metal materials with high heat conductivity coefficient and high strength and good corrosion resistance) to serve as a phase change energy storage device on the heat insulation bonding layer 3, and the phase change material is intensively placed in the heat pipe as shown in figure 2, so that the phase change material is prevented from directly contacting with the outside and is free of loss; the outer surface of the heat pipe is provided with threads or sawteeth, so that the heat pipe can be better bonded with an asphalt surface layer; the asphalt concrete is mixed with a material having a relatively high thermal conductivity (e.g., siO2, graphite powder, etc.) as the facing 1, with 15% of SiO2 and graphite powder being mixed in the facing.
The working principle is as follows: when the external temperature is higher, the surface layer 1 transfers heat to the phase change energy storage device, and the phase change material in the phase change energy storage device absorbs and stores the heat transferred from the surface layer 1; when the external temperature drops below the heat release critical temperature of the phase change material, the phase change material begins to release its stored heat. Therefore, the temperature of the road surface is kept within a certain temperature range, and the effect of automatically removing ice and melting snow is achieved. The main function of the heat insulation bonding layer 3 is to bond the phase change energy storage layer 2 and the base layer 4 well, and simultaneously prevent heat from being transferred to the base layer to damage the base layer 4.
In a flat road with good geological conditions, as shown in fig. 5, the heat pipe arrangement form of the present embodiment is: a plurality of crisscross straight pipes are distributed at equal intervals to form a grid plane, so that construction is facilitated, and heat release is more uniform.
This application is through experimental proof, has better effect to the deicing snow melt of road surface or bridge floor, can realize road initiative deicing snow melt to a certain extent to practice thrift a large amount of manpowers, material resources, can effectively solve the various problems brought by traditional deicing mode.
Example 4
A method for constructing an asphalt pavement capable of removing ice and snow, which is mainly directed to the pavement structures of the above embodiments 1 to 3, and comprises the following steps:
s1: paving a base layer 4 on a road soil base layer according to the construction technical specification and the construction flow requirement of the road asphalt pavement, and paving a heat-insulating bonding layer 3 on the upper surface of the base layer 4 after the base layer 4 is paved; the heat conductivity coefficient of the heat insulation material adopted by the heat insulation bonding layer 3 is not more than 0.030W/m.k, the surface density is not less than 25kg/m < 3 >, the compressive strength is not less than 280kPa, and the linear shrinkage rate is not more than 0.002;
s2: laying a heat pipe filled with a phase-change temperature-adjusting material on the heat-insulating bonding layer 3; the heat pipe is a thin-wall round pipe which is made of copper or aluminum and has the inner diameter of 3 centimeters and is provided with threads or sawteeth, the phase-change heat storage material is filled into the manufactured copper pipe or aluminum pipe and is sealed, finally, the air tightness of the sealed heat pipe is detected, and the sealed heat pipe is placed in a pavement after being qualified;
s3: after the heat pipe is laid, 5% -10% of SiO2 and/or graphite powder is doped into the asphalt concrete to serve as a surface layer 1.
Example 5
As shown in fig. 6, the asphalt pavement capable of removing ice and melting snow sequentially comprises a surface layer 1, a phase-change energy storage layer 2, a heat insulation bonding layer 3 and a base layer 4 from top to bottom, wherein the phase-change energy storage layer 2 is an asphalt layer containing a phase-change temperature-regulating material.
The asphalt is doped with a material with better heat insulation performance and bonding performance as a heat insulation bonding layer 3, the heat insulation bonding layer is asphalt concrete doped with 5% -20% of heat insulation materials (such as hydrogenated nitrile butadiene rubber HNBR, silicon rubber and the like), and on the heat insulation bonding layer 3, different from the above embodiments 1-3, an asphalt layer containing a phase change temperature adjusting material is paved, wherein the phase change material accounts for 10% -20%; materials with higher heat conductivity coefficient (such as SiO2, graphite powder and the like) are doped into the asphalt concrete to be used as a surface layer 1, and 5-10% of SiO2 and/or graphite powder is doped into the surface layer.
The working principle is as follows: when the external temperature is higher, the surface layer 1 transfers heat to the phase change energy storage device, and the phase change material in the phase change energy storage device absorbs and stores the heat transferred from the surface layer 1; when the external temperature drops below the heat release critical temperature of the phase change material, the phase change material begins to release its stored heat. Therefore, the temperature of the road surface is kept within a certain temperature range, and the effect of automatically removing ice and melting snow is achieved. The main function of the heat insulation bonding layer 3 is to bond the phase change energy storage layer 2 and the base layer 4 well, and simultaneously prevent heat from being transferred to the base layer to damage the base layer 4.
This application is proven through the experiment, has better effect to the deicing snow melt of road surface or bridge floor, can realize road initiative deicing snow melt to a certain extent to practice thrift a large amount of manpowers, material resources, can effectively solve the various problems that are brought by traditional deicing mode.
Example 6
A method for constructing an asphalt pavement capable of removing ice and snow, which is mainly directed to the pavement structure of the embodiment 5, and comprises the following steps:
s1: paving a base layer 4 on a road soil base layer according to the construction technical specification and the construction flow requirement of the road asphalt pavement, and paving a heat-insulating bonding layer 3 with the thickness of 0.5cm-1cm on the upper surface of the base layer 4 after the base layer 4 is paved; the heat conductivity coefficient of a heat insulating material adopted by the heat insulating bonding layer 3 is not more than 0.030W/m.k, the surface density is not less than 25kg/m < 3 >, the compressive strength is not less than 280kPa, and the linear shrinkage rate is not more than 0.002;
s2: after the heat insulation bonding layer 3 is paved, 10-20% of phase change material is doped into asphalt concrete to serve as a phase change energy storage layer 2;
s3: after the phase change energy storage layer 2 is paved, 5% -10% of SiO2 and/or graphite powder is doped into the asphalt concrete to serve as a surface layer.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention is included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a can deicing bituminous paving who melts snow which characterized in that, from supreme basic unit, thermal-insulated tie coat, phase transition energy storage layer and the surface course of setting gradually down, the phase transition energy storage layer is for pouring into phase transition thermoregulation material and sealed heat pipe or phase transition concrete layer, thermal-insulated tie coat is rubber asphalt concrete layer.
2. The asphalt pavement capable of removing ice and snow according to claim 1, wherein the arrangement of the heat pipes in the horizontal plane is a wave-shaped pipe.
3. The asphalt pavement capable of removing ice and snow according to claim 1, wherein the arrangement of the heat pipes in the horizontal plane can be two opposite wavy wave-shaped pipes.
4. The asphalt pavement capable of removing ice and snow according to claim 1, wherein the arrangement of the heat pipes in the horizontal plane is such that a plurality of criss-cross straight pipes are distributed in a mesh shape at equal intervals.
5. The asphalt pavement capable of removing ice and snow according to any one of claims 1 to 4, wherein the outer surface of the heat pipe is provided with threads or serrations so as to enable the heat pipe to be better bonded with the asphalt pavement.
6. The asphalt pavement capable of removing ice and snow according to claim 5, wherein the heat pipe is a copper pipe or an aluminum pipe, the inner diameter of the heat pipe is 3-5cm, and the wall thickness of the heat pipe is 2-4mm.
7. The asphalt pavement capable of removing ice and snow according to claim 5, wherein the heat pipes are anchored on the heat insulating bonding layer.
8. The asphalt pavement capable of removing ice and snow according to claim 1, wherein the heat insulating material is hydrogenated nitrile rubber or silicone rubber.
9. The asphalt pavement capable of deicing and melting snow of claim 1, wherein the thickness of said thermal insulation bonding layer is 0.5cm-1cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123215386.2U CN218291487U (en) | 2021-12-20 | 2021-12-20 | Asphalt pavement capable of removing ice and melting snow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123215386.2U CN218291487U (en) | 2021-12-20 | 2021-12-20 | Asphalt pavement capable of removing ice and melting snow |
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| CN218291487U true CN218291487U (en) | 2023-01-13 |
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| CN202123215386.2U Active CN218291487U (en) | 2021-12-20 | 2021-12-20 | Asphalt pavement capable of removing ice and melting snow |
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