CN204212019U - Phase transformation cooling asphalt pavement structure - Google Patents
Phase transformation cooling asphalt pavement structure Download PDFInfo
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- CN204212019U CN204212019U CN201420567381.7U CN201420567381U CN204212019U CN 204212019 U CN204212019 U CN 204212019U CN 201420567381 U CN201420567381 U CN 201420567381U CN 204212019 U CN204212019 U CN 204212019U
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- steel pipe
- coating steel
- phase transformation
- asphalt concrete
- heat
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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Abstract
The utility model discloses a kind of phase transformation cooling asphalt pavement structure, road structure comprises particulate formula asphalt concrete pavement, heat-conducting type asphalt concrete layer, isolation layer and basic unit from top to bottom successively, equidistantly be equipped with coating steel pipe in described heat-conducting type asphalt concrete layer, in described coating steel pipe, be packaged with phase-change material; The Rigidity and strength of this phase transformation road structure is not subject to temperature and rain water mitigation, the high/low temperature stability of flexible pavement is strong, the mechanical property of road structural system and functional performance change less, durability and safety high, in hot weather situation, can reduction pavement temperature by a relatively large margin, generation and the alleviating urban heat island effect of the disease such as rut, passing, bellding in summer high temperature weather can be alleviated.
Description
Technical field
The utility model relates to pavement construction material technical field, particularly a kind of phase transformation cooling asphalt pavement structure.
Background technology
Along with social economy and highway transportation cause develop rapidly, the multiple advantages such as flexible pavement is high with its planeness, road-ability good, noise is low are widely used in the construction of the means of transportation such as highways and streets and airport.According to statistics, China building, rebuild or medium-capital overhauling speedway in more than 90% have employed flexible pavement.Pitch is as the typical viscoelastic material of one, and bituminous pavement property is subject to the impact of load and temperature.China's most area is hot for summer, temperature even reaches more than 40 DEG C often beyond 35 DEG C, because the high-absorbility of pitch to solar heat makes flexible pavement surface temperature up to more than 60 DEG C, to more than 80 DEG C, the softening point temperature of road asphalt can have been exceeded under extreme weather conditions, and along with temperature rising, deflection is larger, the high-temperature stability of flexible pavement is met a severe test, produces thermostability disease, have a strong impact on functional performance and the traffic safety of flexible pavement; Meanwhile, the flexible pavement of high temperature also discharges a large amount of pitch volatiles, affects human settlement, and the continuous release heat of the flexible pavement that have accumulated amount of heat causes ambient air temperature to raise, and exacerbates urban heat land effect.If certain measure can be taked to reduce flexible pavement temperature, then can effectively alleviate the negative effect brought by high temperature.For problems such as asphalt pavement rut diseases, Chinese scholars has carried out a lot of research, proposes a lot of solution.Widely use modified bitumen at present, improve the composition structure etc. of bituminous mixture, serve the effect of prevention and alleviation flexible pavement high temperature disease to a certain extent, but fundamentally do not solve the high temperature disease problem of flexible pavement.
Phase-change material or title phase-change heat-storage material, refer in certain temperature range, namely change in transition temperature range its phase (as from solid-state to liquid or from liquid state to solid-state), absorb with the form of latent heat, store or discharge amount of heat and material that self-temperature remains unchanged.Phase-change material has the characteristic of thermal energy storage and temperature regulable control; it is made to have using value in a lot of fields, as Solar use, power peak regulation, Waste Heat Reuse, cross-season heat-storing and Chu Leng, food fresh-keeping, building heat insulation, electronic device Thermal protection, textile garment, agricultural etc.But the application of phase-change material in highway communication field is still in the exploratory development stage, its application study in asphalt concrete pavement then just starts.Phase-change material is applied in asphalt concrete pavement material, can formation temperature Self-controlled road surface.When ambient temperature acutely raises, phase-change thermal storage ground surface material utilizes its phase transition process to be transformed by solar energy during high temperature on daytime, slows down the change of pavement temperature, avoids road surface to be in the condition of high temperature for a long time, not only reduce road surface thermostability disease, reduce ambient temperature.Form phase-transition self-temperature-regulating road surface if be applied in flexible pavement by phase-change material, effectively can avoid the generation of thermostability disease, extend Road Service Life, reduce the maintenance cost of road, improve traffic safety; Meanwhile, can effectively alleviate heat island effect, save the energy, improve human settlement.
But, if when phase-change material being directly used in concrete flexible pavement, asphalt concrete pavement can be received equally when bearing vehicular load, the cutting slippage that still there will be, peeling gather around the shear failure such as bag, in length and breadth crack, also can be subject to the impact of outside environmental elements simultaneously, the mechanical property of road structural system and functional performance are had greatly changed.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of phase transformation cooling asphalt pavement structure, the Rigidity and strength of this phase transformation road structure is not subject to temperature and rain water mitigation, the mechanical property of road structural system and functional performance change less, the change of pavement temperature can be slowed down, road surface is avoided to be in the condition of high temperature for a long time, not only reduce road surface thermostability disease, and reduce road surface to function of environment heat emission, reduce ambient temperature, effectively avoid the generation of thermostability disease, extend Road Service Life, reduce the maintenance cost of road, improve traffic safety; Meanwhile, can effectively alleviate heat island effect, save the energy, improve human settlement.
Phase transformation cooling asphalt pavement structure of the present utility model, road structure comprises particulate formula asphalt concrete pavement, heat-conducting type asphalt concrete layer, isolation layer and basic unit from top to bottom successively, equidistantly be equipped with coating steel pipe in described heat-conducting type asphalt concrete layer, in described coating steel pipe, be packaged with phase-change material;
Further, described coating steel pipe is the U-shaped structure of horizontal laying in heat-conducting type asphalt concrete layer or linear structure;
Further, be provided with the deep floor being socketed on coating steel pipe external surface in described heat-conducting type asphalt concrete layer, described deep floor equidistantly distributes along coating steel pipe external surface and forms gridiron with coating steel pipe entirety;
Further, the distance on described coating steel pipe and road structure surface is 2.5-5cm, and the spacing of adjacent coating steel pipe is 28-32cm, and the inner and outer diameter of described coating steel pipe is respectively 16-18mm and 20-22mm;
Further, the modulus of elasticity of described particulate formula asphalt concrete pavement is 3000-3200Mpa;
Further, described deep floor is polystyrol plastic foam plate;
Further, described isolation layer is ceramic granule asphalt concrete;
Further, the distance on described coating steel pipe and road structure surface is 5cm, and the spacing of adjacent coating steel pipe is 30cm, and the inner and outer diameter of described coating steel pipe is respectively 18mm and 20mm;
Further, the modulus of elasticity of described particulate formula asphalt concrete pavement is 3000Mpa.
The beneficial effects of the utility model: phase transformation cooling asphalt pavement structure of the present utility model, utilize the road structure with self-temperature-regulating function that phase-change material and flexible pavement are formed, when ambient temperature acutely raises, phase-change material utilizes its phase transition process to be transformed by solar energy during high temperature on daytime, slow down the change of pavement temperature, road surface is avoided to be in the condition of high temperature for a long time, not only reduce road surface thermostability disease, and reduce road surface to function of environment heat emission, reduce ambient temperature, pavement temperature 2 ~ 10 DEG C can be reduced under the high temperature conditions, effectively can avoid the generation of thermostability disease, extend Road Service Life, reduce the maintenance cost of road, improve traffic safety, meanwhile, can effectively alleviate heat island effect, save the energy, improve human settlement.And the Rigidity and strength of this phase transformation road structure is not subject to temperature and rain water mitigation, the high/low temperature stability of flexible pavement is strong, the mechanical property of road structural system and functional performance change less, durability and safety high, in hot weather situation, not only can reduction pavement temperature by a relatively large margin, the generation of the disease such as rut, passing, bellding in summer high temperature weather can also be alleviated.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the perspective view that coating steel pipe is combined with deep floor;
Fig. 3 is the top view that coating steel pipe is combined with deep floor.
Detailed description of the invention
Fig. 1 is structural representation of the present utility model, and Fig. 2 is the perspective view that coating steel pipe is combined with deep floor; Fig. 3 is the top view that coating steel pipe is combined with deep floor.As shown in the figure: the phase transformation cooling asphalt pavement structure of the present embodiment, road structure comprises particulate formula asphalt concrete pavement 1, heat-conducting type asphalt concrete layer 2, isolation layer 3 and basic unit 4 from top to bottom successively, equidistantly be equipped with coating steel pipe 21 in described heat-conducting type asphalt concrete layer 2, in described coating steel pipe 21, be packaged with phase-change material; Road structure adopts hierarchy, the phase-change material of coating steel pipe 21 and interior encapsulation thereof forms phase-change heat accumulation system, phase-change material comprises the organic compound of the phase transition temperatures such as paraffin, lipid, fatty acid and polyalcohols between 30-70 DEG C [or the organic compound of phase transition temperature between 30-70 DEG C such as n-octadecane, NSC 77136, aliphatic acid, fatty alcohol, paraffin (44# ~ 58#) and polyethylene glycol (1000,1500,2000,4000,6000)], coating steel pipe 21 can also play transversal reinforcement effect, prevents the longitudinal cracking on road surface.The solar collecting performance of coating steel pipe 21 is best, fill heat and heat release by the phase-change material of heat transfer to its encapsulation, and it is high to have intensity, pliability is good, heat stability and sealing good, durability and safety high, and to have good compatibility good with phase-change material, without infiltration, corrosion-free, without chemical reaction, cost is low, good economy performance.Steel pipe should adopt round steel pipe.
In the present embodiment, described coating steel pipe 21 is the U-shaped structure of horizontal laying in heat-conducting type asphalt concrete layer 2 or linear structure; U-shaped structure is snake pipe, and linear structure is straight tube structure, and U-shaped structure or linear structure distribute and form calandria structure in heat-conducting type asphalt concrete layer 2.
In the present embodiment, be provided with the deep floor 22 being socketed on coating steel pipe 21 external surface in described heat-conducting type asphalt concrete layer 2, described deep floor 22 equidistantly distributes along coating steel pipe 21 external surface and forms gridiron with coating steel pipe 21 entirety; Because coating steel pipe 21 both sides the most easily take the lead in shear failure occurs, therefore employing deep floor 22 weakens the shear failure power that its both sides are subject to, and plays the effect of reinforce stabilization.During construction, first construct a part of heat-conducting type asphalt concrete layer 2 as bed course, then mounted package has the coating steel pipe 21 of phase-change material and deep floor 22 to cast upper strata heat-conducting type asphalt concrete layer 2 again, and the gap that upper and lower two-layer heat-conducting type asphalt concrete layer 2 and coating steel pipe 21 and deep floor 22 are formed interpenetrates, it is in aggregates to merge.Heat-conducting type bituminous concrete is the thermal conductive asphalt concrete that the heat conduction phase filling that mixes different proportion in bituminous mixture is prepared, and bituminous concrete is the non-conductor of heat, by mixing heat conduction phase filling, can improve its heat conductivility.Heat conduction phase filling conventional at present comprises metal packing and non-metallic fillers, and shape is powder, whisker and fiber.Metal packing, due to the corrosion-resistant poor Heat Conduction Material to there being antiseptic property requirement, often selects the non-metallic fillers with decay resistance, as graphite, carbon fiber etc.It is high that graphite has thermal conductivity, corrosion resistance and good, with the advantage such as bitumen compatibility is strong, and graphite is laminated structure, easy bridge joint between graphite, when graphite volume content is greater than a certain scope, easily forms heat conduction network, be conducive to the raising of material thermal conductivity, the graphite of laminated structure has lubrication, be conducive to the dispersion in bituminous mixture, graphite packing has higher heat resistance, can not because mixing and stirring the high and variable color of temperature in the preparation process of bituminous mixture.The present embodiment selects carbon fiber as the concrete reinforcing agent of thermal conductive asphalt.Carbon fiber has that general carbon materials is high temperature resistant, rub resistance, corrosion-resistant, chemically stable and the characteristic such as heat conduction, conduction, and carbon fiber had both had good reinforcement humidification to bituminous concrete.
In the present embodiment, described coating steel pipe 21 is 2.5-5cm with the distance on road structure surface, and the spacing of adjacent coating steel pipe 21 is 28-32cm, and the inner and outer diameter of described coating steel pipe 21 is respectively 16-18mm and 20-22mm; Due to the effect of load; the mat formation parameter such as laying form, buried depth of phase transformation heater in asphalt concrete pavement surface structure directly affects the functional performance of phase-change material; due under Vehicle Load; in road structure, maximum shear stress increases to rapidly maximum with the increase of the degree of depth; and then reduce gradually; therefore; when coating steel pipe 21 is 2.5-5cm with the distance on road structure surface; the shear stress that coating steel pipe 21 is subject to is minimum; be conducive to protecting coating steel pipe 21, and then strengthen the durability of phase transformation materials'use.Coating steel pipe 21 and the distance on road structure surface, the spacing of adjacent coating steel pipe 21, and the structural strength that this deck of sound assurance is set of the inner and outer diameter of coating steel pipe 21, can be good at the mechanical requirements meeting deck, reduce Phase Transition Systems simultaneously as much as possible and be subject to the interference of external environment and affect.By following test (1) based on finite element theory, application ANSYS software, to phase transformation cooling road surface, the FEM (finite element) model that to set up with certain actual road structure be parameter, and under various working, carry out force analysis; (2) phase transformation cooling road surface is layed in the middle of asphalt concrete pavement surface by Phase Transition Systems, therefore according to the requirement of " bituminous concrete design specifications " (JTGD50-2006), analyze the parameter of road structure under different load simplified models.(3) under Action of Vertical Loads, mechanical response analysis is carried out to phase transformation phase transformation cooling Finite Element Model of Pavement Structure, study in different wheel load, different contact area, different load assignment form situation, phase transformation phase transformation cooling road surfaces deflection value Changing Pattern, maximum shear stress and heat-generating system surface shearing stress change curve.(4) under horizontal loads, to phase transformation cooling road structure, stressing conditions when it is in different Vehicle Load positions, different surface friction coefficient situations is inquired into.(5) mechanism of action that Phase Transition Systems lays other considerable influence factors of parameter is inquired into.The modulus of elasticity of road structure surface material and the heating power of phase-change accumulation energy system rationally determine there is suitable impact to parameter of mating formation.Research shows, the FEM (finite element) model of the phase transformation cooling road structure of foundation is rationally suitable for; The phase transformation cooling maximum deflection value of road structure calculated according to model inspection, maximum shear stress value meet " bituminous concrete design specifications " requirement, and then determine that the best of the present utility model is mated formation parameter.
In the present embodiment, the modulus of elasticity of described particulate formula asphalt concrete pavement 1 is 3000-3200Mpa; Under Vehicle Load, road wheel gap center deflection value is little, rigidity is large, the deflection value that phase-change material pipe (coating steel pipe 21) surperficial pressure causes and stress diminish all relatively, reduce shear strain and the vertical deformation of road structure, strengthen the ability that ground surface material resists various distortion, suppress or reduce the object that road surface produces rut.
In the present embodiment, described deep floor 22 is polystyrol plastic foam plate.
In the present embodiment, described isolation layer 3 is ceramic granule asphalt concrete; Coefficient of thermal conductivity is little, not by construction thickness limits.
In the present embodiment, be preferably, described coating steel pipe 21 is 5cm with the distance on road structure surface, and the spacing of adjacent coating steel pipe 21 is 30cm, and the inner and outer diameter of described coating steel pipe 21 is respectively 18mm and 20mm;
In the present embodiment, be preferably, the modulus of elasticity of described particulate formula asphalt concrete pavement 1 is 3000Mpa.
Finally illustrate, above embodiment only in order to the technical solution of the utility model to be described and unrestricted,
Although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (9)
1. a phase transformation cooling asphalt pavement structure, it is characterized in that: road structure comprises particulate formula asphalt concrete pavement, heat-conducting type asphalt concrete layer, isolation layer and basic unit from top to bottom successively, equidistantly be equipped with coating steel pipe in described heat-conducting type asphalt concrete layer, in described coating steel pipe, be packaged with phase-change material.
2. phase transformation according to claim 1 cooling asphalt pavement structure, is characterized in that: described coating steel pipe is the U-shaped structure of horizontal laying in heat-conducting type asphalt concrete layer or linear structure.
3. phase transformation cooling asphalt pavement structure according to claim 2, it is characterized in that: be provided with the deep floor being socketed on coating steel pipe external surface in described heat-conducting type asphalt concrete layer, described deep floor equidistantly distributes along coating steel pipe external surface and forms gridiron with coating steel pipe entirety.
4. phase transformation cooling asphalt pavement structure according to claim 3, it is characterized in that: phase transformation cooling asphalt pavement structure, it is characterized in that: the distance on described coating steel pipe and road structure surface is 2.5-5cm, the spacing of adjacent coating steel pipe is 28-32cm, and the inner and outer diameter of described coating steel pipe is respectively 16-18mm and 20-22mm.
5. phase transformation cooling asphalt pavement structure according to claim 4, is characterized in that: its modulus of elasticity of described particulate formula asphalt concrete pavement is 3000-3200Mpa.
6. phase transformation cooling asphalt pavement structure according to claim 5, is characterized in that: described deep floor is polystyrol plastic foam plate.
7. phase transformation cooling asphalt pavement structure according to claim 6, is characterized in that: described isolation layer is ceramic granule asphalt concrete.
8. phase transformation cooling asphalt pavement structure according to claim 7, it is characterized in that: the distance on described coating steel pipe and road structure surface is 5cm, the spacing of adjacent coating steel pipe is 30cm, and the inner and outer diameter of described coating steel pipe is respectively 18mm and 20mm.
9. phase transformation cooling asphalt pavement structure according to claim 8, is characterized in that: the modulus of elasticity of described particulate formula asphalt concrete pavement is 3000Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420567381.7U CN204212019U (en) | 2014-09-11 | 2014-09-29 | Phase transformation cooling asphalt pavement structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420520673 | 2014-09-11 | ||
| CN2014205206735 | 2014-09-11 | ||
| CN201420567381.7U CN204212019U (en) | 2014-09-11 | 2014-09-29 | Phase transformation cooling asphalt pavement structure |
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| CN204212019U true CN204212019U (en) | 2015-03-18 |
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| CN201420567381.7U Expired - Fee Related CN204212019U (en) | 2014-09-11 | 2014-09-29 | Phase transformation cooling asphalt pavement structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106948234A (en) * | 2017-03-29 | 2017-07-14 | 长沙理工大学 | A kind of novel thermoregulating asphalt pavement structure |
| CN108797257A (en) * | 2017-05-04 | 2018-11-13 | 镇江港和新型建材有限公司 | A kind of public affairs service asphalt concrete |
| CN110344297A (en) * | 2018-04-03 | 2019-10-18 | 南京林业大学 | A kind of heat-insulated pavement structure and construction method |
| CN110532714A (en) * | 2019-09-03 | 2019-12-03 | 石家庄铁道大学 | Che-road-bridge Coupling Dynamics Analysis method |
| CN113308955A (en) * | 2021-05-17 | 2021-08-27 | 浙大城市学院 | Construction method of cast-in-place concrete full-protection foam light soil wide-spliced embankment |
| CN114108415A (en) * | 2021-12-08 | 2022-03-01 | 武汉理工大学 | Double-layer phase-change temperature-adjusting asphalt pavement structure |
| CN114855546A (en) * | 2021-12-14 | 2022-08-05 | 付学贵 | Airport runway snow removing device and facility |
-
2014
- 2014-09-29 CN CN201420567381.7U patent/CN204212019U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106948234A (en) * | 2017-03-29 | 2017-07-14 | 长沙理工大学 | A kind of novel thermoregulating asphalt pavement structure |
| CN108797257A (en) * | 2017-05-04 | 2018-11-13 | 镇江港和新型建材有限公司 | A kind of public affairs service asphalt concrete |
| CN110344297A (en) * | 2018-04-03 | 2019-10-18 | 南京林业大学 | A kind of heat-insulated pavement structure and construction method |
| CN110532714A (en) * | 2019-09-03 | 2019-12-03 | 石家庄铁道大学 | Che-road-bridge Coupling Dynamics Analysis method |
| CN110532714B (en) * | 2019-09-03 | 2023-04-07 | 石家庄铁道大学 | Vehicle-road-bridge coupling dynamics analysis method |
| CN113308955A (en) * | 2021-05-17 | 2021-08-27 | 浙大城市学院 | Construction method of cast-in-place concrete full-protection foam light soil wide-spliced embankment |
| CN114108415A (en) * | 2021-12-08 | 2022-03-01 | 武汉理工大学 | Double-layer phase-change temperature-adjusting asphalt pavement structure |
| CN114855546A (en) * | 2021-12-14 | 2022-08-05 | 付学贵 | Airport runway snow removing device and facility |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150318 Termination date: 20210929 |
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| CF01 | Termination of patent right due to non-payment of annual fee |