Anti-track bituminous pavement cooling structure and material composition of each layer thereof

A technology of asphalt pavement and cooling structure, which is applied to cohesive pavement paved on site, roads, roads, etc., can solve the problems of surface layer temperature in the middle surface layer heat deformation, reduce road rutting, and reduce the temperature significantly. Effect of road surface temperature

Pending Publication Date: 2019-11-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few studies and reports on the methods of preventing the therm

Method used

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  • Anti-track bituminous pavement cooling structure and material composition of each layer thereof
  • Anti-track bituminous pavement cooling structure and material composition of each layer thereof
  • Anti-track bituminous pavement cooling structure and material composition of each layer thereof

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Example Embodiment

[0017] Example 1

[0018] In order to better understand the present invention, the content of the present invention will be further described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0019] Example 1

[0020] The pavement structure in this embodiment consists of a low thermal conductivity top layer 1, a heat storage middle surface layer 2 and a high thermal conductivity bottom layer 3.

[0021] The low thermal conductivity upper layer 1 uses AC-13 mixture, 70# matrix asphalt, 5.0% oil-stone ratio, mineral gradation as shown in Table 1, and is mixed with 2% ceramic fiber.

[0022] Table 1 AC-13 gradation

[0023]

[0024] The heat storage middle surfac...

Example Embodiment

[0032] Example 2

[0033] The pavement structure in this embodiment consists of a low thermal conductivity top layer 1, a heat storage middle surface layer 2 and a high thermal conductivity bottom layer 3.

[0034] The low thermal conductivity upper layer uses Superpave-13 mixture, 70# matrix asphalt, 5.2% oil-stone ratio, mineral gradation as shown in Table 4, and incorporates 3% glass fiber.

[0035] Table 4 Superpave-13 gradation

[0036]

[0037] The surface layer of the heat storage adopts Superpave-20 mixture, 70# matrix asphalt, 4.4% oil-stone ratio, and the mineral material gradation is shown in Table 5, in which the composite phase change material is used to replace the mineral powder in equal volume. The composite phase change material is prepared by using diatomaceous earth as a support to physically adsorb paraffin wax, and its preparation method is to completely soak expanded graphite in paraffin wax with 20 carbon atoms, stir and adsorb for 6 hours, and then filter to ob...

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Abstract

The invention discloses an anti-track bituminous pavement cooling structure and a material composition of each layer thereof. The anti-track bituminous pavement cooling structure comprises a low-heatconduction upper face layer, a heat storage intermediate face layer and a high-heat-conduction lower face layer from top to bottom. During construction, layered paving and rolling are combined, and tack coat is scattered between the layers. According to the anti-track bituminous pavement cooling structure, a pavement structure actively carries out temperature control on a bituminous pavement, andpavement tracks are reduced by reducing the temperature of the intermediate face layer and the lower face layer of the bituminous pavement. According to the anti-track bituminous pavement cooling structure, the bituminous pavement structure with the low-heat conduction upper face layer, the heat storage intermediate face layer and the high-heat-conduction lower face layer is adopted, the pavementtemperature is reduced to the maximum degree through heat induction and phase change heat storage, and the cooling effect is remarkable. According to the anti-track bituminous pavement cooling structure, heat insulation fibers are added to the material of the low-heat conduction upper face layer, the high-temperature performance of a mixture can be improved while the heat conduction performance ofthe pavement, and the anti-track capacity of the upper face layer is improved.

Description

technical field [0001] The invention belongs to the field of road engineering, and in particular relates to a rutting-resistant asphalt pavement cooling structure and various layers of materials. Background technique [0002] The temperature of the asphalt pavement in summer can reach 60-70°C, and the asphalt pavement is prone to serious rutting damage under the action of vehicle load. Rutting will cause water drift and unequal tire-road contact stress, which will further aggravate road surface damage and affect vehicle driving safety. In our country, too deep ruts are the most important reason for overhauling asphalt pavement, accounting for more than 80% of the total. Road research workers improve the anti-rutting performance of asphalt pavement by using high modulus asphalt, anti-rutting agent, fiber asphalt mixture, and optimizing the mixture gradation and pavement structure, and have achieved certain results. However, asphalt mixture is a kind of viscoelastic material...

Claims

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Application Information

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IPC IPC(8): E01C7/26
CPCE01C7/26E01C7/262
Inventor 杜银飞刘谱晟王嘉诚薛智博
Owner CENT SOUTH UNIV
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