A kind of asphalt mixture for alleviating urban heat island effect and preparation method thereof

A technology of urban heat island effect and asphalt mixture, which is applied in the field of asphalt mixture, can solve the problems of high heat capacity of road materials, low solar reflectance, and environmental pollution, so as to reduce the dissipation of heat energy, reduce the overall temperature, and reduce heat Effect

Active Publication Date: 2017-06-23
HUNAN BAOLI ASPHALT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to solve the problems that the existing road materials have high heat capacity, high thermal conductivity, low reflectivity to sunlight during the day, high heat absorption rate, waste glass occupying land, polluting the environment, and wasting resources

Method used

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  • A kind of asphalt mixture for alleviating urban heat island effect and preparation method thereof
  • A kind of asphalt mixture for alleviating urban heat island effect and preparation method thereof
  • A kind of asphalt mixture for alleviating urban heat island effect and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The asphalt mixture of this embodiment is formed by mixing 48g of modified asphalt, 0.95g of slaked lime powder and 951.05g of aggregate.

[0026] The modified asphalt of the present embodiment is by doping nano glass microspheres in the matrix asphalt, and utilizes the nano glass microspheres to modify the matrix asphalt, wherein the matrix asphalt adopts SK-70# matrix asphalt, and its various performance indicators (such as Penetration, ductility, softening point, etc.) should be tested to meet the requirements of the "Highway Engineering Aggregate Test Regulations" (JTG E42-2005), the base asphalt is 46.08g, accounting for 96% of the total modified asphalt. The amount of glass microspheres is 1.92g, accounting for 4% of the total amount of modified asphalt, and its particle size is 7-13nm.

[0027] The gradation of the above-mentioned aggregates satisfies: when passing through sieves of 26.5, 19, 16, 13.2, 9.5, 4.75, 2.36, and 0.075 mm respectively, the pass rates co...

Embodiment 2

[0033] The change of this embodiment relative to the first embodiment is that the asphalt mixture is made by mixing 45g of modified asphalt, 0.9g of slaked lime powder and 952.6g of aggregate.

[0034] The modified asphalt of this embodiment is by doping nano-glass microspheres in the matrix asphalt, and utilizing nano-glass microspheres to modify the matrix asphalt, wherein the matrix asphalt is 43.65g, accounting for 97% of the total amount of modified asphalt, which It adopts SK-70# matrix asphalt, and its various performance indicators (such as penetration, ductility, softening point, etc.) The ball is 1.35g, accounting for 3% of the total amount of modified asphalt, and its particle size ranges from 7 to 13nm.

[0035] The gradation of the above-mentioned aggregates satisfies: when passing through sieves of 26.5, 19, 16, 13.2, 9.5, 4.75, 2.36, and 0.075 mm respectively, the pass rates correspond to 100%, 95%, 78%, 68%, 50%, 30%, 16%, 4%, which is basalt, its needle flake...

Embodiment 3

[0038] The change of this embodiment relative to the first embodiment is that the asphalt mixture is made by mixing 50 g of modified asphalt, 1 g of slaked lime powder and 949 g of aggregate.

[0039] The modified asphalt of this embodiment is by doping nano-glass microspheres in the matrix asphalt, and utilizing nano-glass microspheres to modify the matrix asphalt, wherein the matrix asphalt is 47.5g, accounting for 95% of the total amount of modified asphalt. Use SK-70# base asphalt. The amount of glass microspheres is 2.5g, accounting for 5% of the total amount of modified asphalt, and the particle size range is 8-11nm.

[0040] The gradation of the above-mentioned aggregates satisfies: when passing through sieves of 26.5, 19, 16, 13.2, 9.5, 4.75, 2.36, and 0.075 mm respectively, the pass rates correspond to 100%, 97%, 85%, 74%, 54%, 35%, 20%, and 6%, which are basalts, whose needle flake content ≤ 10%, crushing value ≤ 23%, Los Angeles abrasion loss ≤ 24%, should be teste...

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Abstract

The invention relates to the technical field of bituminous mixtures, in particular to a bituminous mixture relieving the urban heat island effect and a preparing method thereof.According to nano-glass modified bitumen and the bituminous mixture prepared from the nano-glass modified bitumen, waste glass serves as a raw material to be prepared into the nano-glass, the nano-glass is added into matrix bitumen to modify the matrix bitumen so that the matrix bitumen can have the characters of preserving heat, insulating heat and reducing the heat absorption capacity of road surfaces, the modified matrix bitumen and reasonable gradation aggregate are mixed into the bituminous mixture, and the spalling resistance of the bituminous mixture is improved through slaked lime.The pavement performance stability of the bituminous mixture is guaranteed while the performance of heat resistance and heat insulation of the nano-glass bituminous mixture is improved, the nano-glass bituminous mixture can reduce the heat absorption capacity of the road surfaces and reduce heat transmitted downwards in summer, the nano-glass bituminous mixture can keep the temperature of the road surfaces and reduce the heat energy consumption in winter, and therefore the purpose of reducing the bulk temperature of the bituminous pavement is achieved; the problem of waste glass waste disposal can be solved, and the heat insulation and heat preservation performance of the bituminous mixture can be performed to relieve the urban heat island effect.

Description

technical field [0001] The invention relates to the technical field of asphalt mixture, in particular to an asphalt mixture for alleviating the urban heat island effect and a preparation method thereof. Background technique [0002] At present, the urban heat island effect (Urban Heat Island Effect) in many cities in China has become very prominent, and it has become one of the problems that must be solved in urban development. The characteristics of high efficiency, low reflectivity to sunlight and high heat absorption rate during the day, so the urban surface temperature is much higher than the suburban temperature. Asphalt pavement is widely used as the main pavement form of urban roads in my country. This pavement structure leads to continuous high temperature in summer and intensifies the urban heat island effect. In recent years, a large number of road research workers have also tried to improve the thermophysical properties of the road surface by optimizing the road ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C04B14/24C04B20/00
CPCC04B26/26C04B14/14C04B14/24C04B20/008C04B22/064Y02A30/60
Inventor 韩君于晓飞龙浩马杰马晓梅周德洪陈澄
Owner HUNAN BAOLI ASPHALT
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