Phase change modified asphalt and preparation method thereof

A modified asphalt and phase change technology, which is applied in building components, building insulation materials, buildings, etc., to achieve the effects of maintaining ecological balance, simple preparation, and controlling high-temperature diseases

Inactive Publication Date: 2012-10-03
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the high temperature rutting problem of the existin

Method used

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  • Phase change modified asphalt and preparation method thereof
  • Phase change modified asphalt and preparation method thereof
  • Phase change modified asphalt and preparation method thereof

Examples

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Example Embodiment

[0016] Specific embodiment 1: A phase change modified asphalt of this embodiment is composed of 7 to 8 parts of asphalt and 2 to 3 parts of organic phase change material in parts by weight.

[0017] In this embodiment, the "peak shifting and valley reduction" effect of the phase change material is used to adjust the temperature field of the asphalt pavement, reducing the possibility of high-temperature rutting, and achieving the purpose of effectively controlling high-temperature diseases of the asphalt pavement. At the same time, it has a certain control effect on the urban "heat island effect", reducing environmental pollution and maintaining ecological balance. The phase change modified asphalt for pavement prepared by this embodiment has a reversible phase change process, the phase change temperature is between 40 and 75°C, the phase change latent heat is greater than 25J / g, and the material has large phase change latent heat, non-toxicity, and non-corrosion Features such as ...

Example Embodiment

[0018] Specific embodiment two: this embodiment is different from specific embodiment one in that the asphalt is base asphalt or modified asphalt. Others are the same as the first embodiment.

Example Embodiment

[0019] Specific embodiment three: This embodiment is different from specific embodiments one to two in that the organic phase change material is myristic acid, PEG4000 or palmitic acid. Others are the same as the first to second specific embodiments.

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Abstract

The invention discloses phase change modified asphalt and a preparation method thereof and relates to asphalt and a preparation method of the asphalt, solving the problem of high-temperature ruts of the traditional asphalt concrete pavements. The phase change modified asphalt consists of the following components by weight: 7-8 parts of asphalt and 2-3 parts of organic phase change material. The preparation method comprises the following steps: (1) weighing the asphalt and the organic phase change material; (2) heating the weighed asphalt to 140-175 DEG C and maintaining the temperature for 3 hours; heating the weighed organic phase change material to 100 DEG C, and after the organic phase change material is completely molten into a liquid state, pouring the asphalt; and meanwhile, shearing for 20-40min by adopting a high-speed shearing and emulsifying machine to obtain the phase change modified asphalt. The phase change temperature of the phase change modified asphalt is between 40 DEG C and 75 DEG C, the phase change latent heat is larger than 25J/g, and the phase change modified asphalt has the advantages of larger phase change latent heat, no toxicity, no corrosivity and simple preparation. The invention is applied to the field of asphalt concrete pavements.

Description

technical field [0001] The invention relates to asphalt and a preparation method thereof, in particular to a phase change modified asphalt with a phase change temperature between 40°C and 75°C and a preparation method thereof. Background technique [0002] In summer, under the action of high temperature field and heavy vehicle axle load, asphalt concrete pavement is easy to form high temperature ruts. According to statistics, 85% of the annual road maintenance costs are used for the maintenance and repair of high temperature ruts. Therefore, seeking a scientific and effective method to solve the problem of high-temperature rutting on the road surface has become a research focus. [0003] The causes of rutting on asphalt concrete pavement mainly include two aspects: first, internal factors such as temperature conditions of asphalt concrete pavement and temperature stability of asphalt mixture; second, external factors such as air temperature conditions and traffic loads. Ext...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08K5/09C08L71/08
Inventor 谭忆秋边鑫单丽岩吕建福王海朋姚形傲
Owner HARBIN INST OF TECH
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