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Self-cooling infrared asphalt mixture and preparation method thereof

A technology of asphalt mixture and self-radiation, applied in the direction of climate change adaptation, etc., can solve problems such as high cost and complicated construction technology, and achieve the effect of increasing cohesive force, increasing internal surface area, and reducing heat accumulation

Inactive Publication Date: 2011-05-25
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of colored asphalt to pave the road has multiple advantages such as beautifying the environment and reducing the temperature of the road surface. It has been applied in a small amount in Japan, Western Europe and other countries, and the effect is relatively significant. However, due to the high cost and complicated construction technology, it has not been widely used. Water-retaining pavement is still in the stage of theoretical research
[0005] At present, far-infrared radiation materials are widely used in the fields of military stealth, medical care and industrial furnace energy saving due to their high emissivity in the far-infrared band. The aspect of mitigating the urban heat island effect has not been reported so far

Method used

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  • Self-cooling infrared asphalt mixture and preparation method thereof
  • Self-cooling infrared asphalt mixture and preparation method thereof
  • Self-cooling infrared asphalt mixture and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0041] The self-radiating infrared asphalt mixture was prepared with 6% of infrared powder, and its surface equilibrium temperature, Marshall stability, residual stability, and -10°C low-temperature splitting tensile strength reached 61.34°C, 9.005KN, and 99.0% respectively and 3.089MPa; compared with asphalt mixture without infrared powder, the surface equilibrium temperature decreased by 5.25°C, and the Marshall stability, residual stability, and -10°C low-temperature splitting tensile strength increased by 12.23%, 6.34%, and 30.83% respectively %.

Embodiment 2

[0043]The self-radiating infrared asphalt mixture was prepared with 9% of infrared powder, and its surface equilibrium temperature, Marshall stability, residual stability, and low-temperature splitting tensile strength at -10°C reached 59.49°C, 8.742KN, and 99.1% respectively and 3.339MPa; compared with asphalt mixture without infrared powder, the surface equilibrium temperature decreased by 7.1°C, and the Marshall stability, residual stability, and -10°C low-temperature splitting tensile strength increased by 8.95%, 6.44%, and 41.42%, respectively. %.

Embodiment 3

[0045] The self-radiating infrared asphalt mixture was prepared with 12% of infrared powder, and its surface equilibrium temperature, Marshall stability, residual stability, and -10°C low-temperature splitting tensile strength reached 58.57°C, 8.453KN, and 99.0% respectively and 3.535MPa; Compared with the asphalt mixture without infrared powder, the surface equilibrium temperature decreased by 8.02℃, Marshall stability, residual stability, and -10℃ low temperature splitting tensile strength increased by 5.35%, 6.34% and 49.72% respectively %.

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Abstract

The invention discloses a self-cooling infrared asphalt mixture and a preparation method thereof. The self-cooling infrared asphalt mixture comprises asphalt and coarse and fine aggregates. The invention is characterized in that the asphalt mixture contains infrared powder, and the weight ratio of the infrared powder in the self-cooling infrared asphalt mixture is 3-12%. The preparation method of the self-cooling infrared asphalt mixture comprises the following steps: (1) evenly mixing the infrared powder and mineral powder; (2) preheating the evenly mixed infrared powder and mineral powder obtained in the step (1) to 180-190 DEG C; (3) putting the coarse and fine aggregates into a mixer, and then, adding the evenly mixed infrared power and mineral powder obtained in the step (2) for dry mixing, wherein the dry mixing time is at least 10 seconds; and (4) adding asphalt for wet mixing after dry mixing, wherein the wet mixing time is at least 45 seconds, and the mixing is not finished until the evenness is achieved and all coarse and fine aggregates are applied on the asphalt. According to the invention, the temperature of the mixture is lowered, and simultaneously, the integrity and stability of the mixture are enhanced; and the invention is favorable for reducing the heat accumulation of the urban atmosphere and relieving the urban heat island effect.

Description

technical field [0001] The present invention relates to an asphalt and a preparation method thereof, in particular to an asphalt mixture with self-radiation and cooling properties, and in particular to a modified formula for preparing an asphalt mixture with a cooling effect by using infrared powder as a component ; and the preparation method of the asphalt mixture with self-radiation and cooling properties. Background technique [0002] Existing technology: In the high temperature season of summer, urban roads are prone to high-temperature diseases, mainly including rutting, wrapping, oil flooding and other high-temperature diseases, which seriously affect road driving safety and road service life. At the same time, roads are the main heat source of urban heat island effect, causing atmospheric Temperature rise will affect the improvement of urban living environment. [0003] For a long time, China has mainly adopted negative measures to deal with high-temperature pavement...

Claims

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Application Information

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IPC IPC(8): C04B26/26
CPCY02A30/60
Inventor 解建光耿飞杨朝旭王知乐方晓青李真真
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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