Asphalt pavement structure for alleviating urban heat island effect based on one-way heat conduction

A technology of urban heat island effect and asphalt pavement, which can be applied to cohesive pavement paved on site, roads, roads, etc., can solve the problems of no patents, etc., and achieve the effect of improving road performance, high mechanical performance, and high strength

Inactive Publication Date: 2010-05-05
福建省金泉建设集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the new coating of Ripu Company still has the following problems: due to the existence of a large number of aerosol particles in the air environment of urban roads, it can absorb long-wave radiation reflected from the road surface; at the same time, objects around the road such as buildings and pedestrians will also absorb A lot of heat radiation, therefore, the heat reflected by the pavement coating is not returned to the urban outer space and still radiates out at night
[0006] There have been a lot of researches at home and abroad on the use of powder modified asphalt materials to obtain new physical functions; The thermal function, which guides the solar radiation heat of the asphalt pavement into the underground with a huge heat capacity, is still blank at home and abroad, that is, there is no corresponding patent at home and abroad for the technical method of applying the principle of "one-way heat conduction" to asphalt pavement

Method used

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  • Asphalt pavement structure for alleviating urban heat island effect based on one-way heat conduction
  • Asphalt pavement structure for alleviating urban heat island effect based on one-way heat conduction
  • Asphalt pavement structure for alleviating urban heat island effect based on one-way heat conduction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Refer to attached figure 1 .

[0038] The thermal conductivity of powder modified asphalt mixture is as follows:

[0039] Add the first micro-nano powder 1 with a thermal conductivity of 10-30 W / m·k to the asphalt upper layer 4, the powder material is at least one of silicon oxide, aluminum oxide, and zinc oxide, and the powder particle size is 0.1-30W / m·k. 100 microns, the amount added is 10% to 40% of the amount of graded asphalt in the upper layer.

[0040] Add the second micro-nano powder 2 with a thermal conductivity of 50-90W / m·k in the asphalt middle surface layer 5, the powder is silicon carbide, the particle size of the powder is 0.1-100 microns, and the dosage is the graded asphalt in the middle surface layer 5% to 20% of the dosage.

[0041] Add the third micro-nano powder 3 with a thermal conductivity of 100-140W / m·k in the lower layer 6 of the asphalt, the powder is graphite, the particle size of the powder is 0.1 micron-100 micron, and the dosage is 5% ...

Embodiment 2

[0046] Refer to attached figure 1 The first micronano powder 1 with a thermal conductivity of 10-30 W / m·k is added to the upper layer 4 of the asphalt. The powder material is silicon oxide, aluminum oxide, zinc oxide, and the particle size of the powder is 0.1-100 microns. The amount added is 10% to 40% of the amount of graded asphalt in the upper layer.

[0047] Add the second micro-nano powder 2 with a thermal conductivity of 100-140W / m·k in the asphalt middle surface layer 5, the powder is flake graphite, and the particle size of the powder is 0.1-100 microns, and the dosage is the middle surface layer 1% to 10% of asphalt dosage.

[0048] Add the third micro-nano powder 3 with a thermal conductivity of 100-140W / m·k to the lower layer 6 of the asphalt, the powder material is flake graphite, the particle size of the powder is 0.1 micron-100 micron, and the dosage is as follows 5% to 15% of the amount of asphalt used in layer grading.

[0049] The powder addition method is...

experiment example

[0055] In order to confirm the effectiveness of this typical pavement structure layer, indoor experiments were carried out in the Road and Bridge Laboratory of the School of Transportation, Southeast University. The test is mainly to verify the effectiveness of the unidirectional heat conduction pavement layer structure and the performance difference compared with ordinary asphalt pavement. The experimental device mainly consists of a test box, a variable voltage power supply and a temperature acquisition system. The surrounding and bottom of the test box are made of thermal insulation materials. The test process is that the modified asphalt concrete specimen and the ordinary asphalt concrete specimen are placed in two incubators respectively, and by controlling the irradiation intensity and irradiation time of the mercury lamp and the wind speed on the surface of the specimen, the summer road surface radiation conditions are simulated, and the two methods are compared. The t...

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Abstract

The invention relates to an asphalt pavement structure for alleviating urban heat island effect based on one-way heat conduction, in particular to the asphalt pavement structure which alleviates urban heat island effect by reducing the temperature of urban asphalt pavement. The pavement structure comprises two to multiple layers of structures, and is the pavement layer with a gradient thermal conductivity structure, wherein the thermal conductivity of the external layer is lower than that of the internal layer. The pavement layer has the gradient thermal conductivity structure, comprising an upper layer (4) modified by first micro-nanometer powder (1) with the thermal conductivity of 10 to 30 W / m*k, a middle layer (5) modified by second micro-nanometer powder (2) with the thermal conductivity of 50 to 90 W / m*k, and a lower layer (6) modified by third micro-nanometer powder (3) with the thermal conductivity of 100 to 140 W / m*k. The invention has the advantages of simple structure, convenient construction and low cost, and can be applied to the maintenance and the construction process of urban asphalt pavement to alleviate the urban heat island effect.

Description

technical field [0001] The invention relates to an asphalt pavement structure for alleviating the urban "heat island effect", which can effectively reduce the temperature of the asphalt pavement, reduce the power consumption of urban air conditioners in summer, alleviate the pressure of urban power supply, and is suitable for the "cool pavement" construction demand of urban roads. Background technique [0002] Because the asphalt pavement has a small albedo (0.05-0.15) and a large heat capacity (0.85-1.09J / Kg K), it is very easy to accumulate heat during the day in summer, resulting in a higher road surface temperature; and At night, the asphalt pavement releases a large amount of accumulated heat into the air near the surface in the form of infrared radiation, which is one of the main reasons for the formation of the urban "heat island effect". With the warming of the global climate and the acceleration of urbanization, the urban "heat island effect" will become more promin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/18C04B26/26C04B22/00C04B22/06
CPCY02A30/60
Inventor 王声乐朱启洋
Owner 福建省金泉建设集团有限公司
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