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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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  • Summary
  • 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 existing asphalt concrete pavement, and provide a kind of phase change modified asphalt and its preparation method

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

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specific Embodiment approach 1

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

[0017] This embodiment utilizes the "peak-shifting and valley-eliminating" effect of phase change materials to adjust the temperature field of the asphalt pavement, reduce the possibility of high-temperature rutting, and achieve 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", reduces environmental pollution, and maintains ecological balance. The phase change modified asphalt for pavement prepared by this embodiment has a reversible phase change process, a phase change temperature between 40°C and 75°C, and a phase change latent heat greater than 25J / g. The material has a large phase change latent heat, is non-toxic, and has no corrosion properties, and simple preparation.

specific Embodiment approach 2

[0018] Embodiment 2: This embodiment is different from Embodiment 1 in that: the asphalt is base asphalt or modified asphalt. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0019] Embodiment 3: This embodiment is different from Embodiments 1 to 2 in that: the organic phase change material is myristic acid, PEG4000 or palmitic acid. Others are the same as the specific embodiment 1 to 2.

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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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