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Microwave-absorbing asphalt concrete pavement material composition

A technology of asphalt concrete and pavement materials, which is applied to cohesive pavement paved on site, roads, roads, etc., which can solve the problems of low heating speed, low microwave absorption rate, and low microwave heating efficiency of the pavement, and achieve high heating efficiency. The effect of simple preparation process

Inactive Publication Date: 2010-06-16
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]However, in the process of microwave heating of asphalt, the microwave heating efficiency is obviously low, which seriously limits the application and promotion of microwave heating technology in the field of pavement materials
The reason is that the electromagnetic parameters of the asphalt concrete material itself are unreasonable, resulting in a series of defects such as low microwave absorption rate, large microwave deepening, and low heating rate of the road surface.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Select Shell 90# asphalt for road use, the coarse aggregate is basalt, the fine aggregate is carbonyl iron powder with a particle size of 3-5 microns, and AC-13 asphalt concrete is prepared according to JTGF40-2004 "Technical Specifications for Construction of Highway Asphalt Pavement". The ratio is: carbonyl iron powder 80 grams, limestone powder 20 grams, asphalt 100 grams, ferromagnetic sand 100 grams, basalt 1700 grams. During preparation, mix the ferromagnetic powder material and road asphalt at 160±5°C, and then mix evenly with the coarse aggregate that has been preheated in the asphalt heating and stirring equipment. The mixing temperature of the mixture is 155°C , and then pour the well-mixed mixture into the forming mold, and compact it according to the technical specifications, and the compaction temperature is 150°C. After cooling and demoulding, it becomes AC-13 asphalt concrete. Under the microwave frequency of 0.9-6GHz, the electromagnetic wave reflectivi...

Embodiment 2

[0020] Select Shell 70# asphalt for road use, the coarse aggregate is basalt, the fine aggregate is magnetite fine powder with a particle size less than 75 microns, and AC-13 asphalt concrete is prepared according to JTGF40-2004 "Technical Specifications for Construction of Highway Asphalt Pavement". The ratio is: 100 grams of magnetite fine powder, 100 grams of asphalt, 80 grams of silicon carbide sand, and 1720 grams of basalt. When preparing, mix the ferromagnetic powder material and road asphalt at 160±5°C, and then mix evenly with the coarse aggregate that has been preheated in the asphalt heating and stirring equipment. The mixing temperature of the mixture is 155°C. Then pour the well-mixed mixture into the forming mold, and compact it according to the technical specifications, and the compaction temperature is 150°C. After cooling and demoulding, it becomes AC-13 asphalt concrete. Under the microwave frequency of 0.9-6GHz, the electromagnetic wave reflectivity of the ...

Embodiment 3

[0023] Shell 70# asphalt is selected for road use, the coarse aggregate is basalt, the fine aggregate is nickel-iron spinel powder with a particle size of less than 75 microns, and AC-13 asphalt concrete is prepared according to JTGF40-2004 "Technical Specifications for Construction of Highway Asphalt Pavement". The ratio is: 100 grams of nickel-iron spinel powder, 100 grams of asphalt, 100 grams of ferromagnetic sand, and 1700 grams of basalt. During preparation, mix the ferromagnetic powder material and road asphalt at 160±5°C, and then mix evenly with the coarse aggregate that has been preheated in the asphalt heating and stirring equipment. The mixing temperature of the mixture is 155°C , and then pour the well-mixed mixture into the forming mold, and compact it according to the technical specifications, and the compaction temperature is 150°C. After cooling and demoulding, it becomes AC-13 asphalt concrete. Under the microwave frequency of 0.9-6GHz, the electromagnetic w...

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Abstract

The invention discloses a road asphalt concrete pavement material composition which is applicable to microwave absorption. Magnetic powder is added for replacing all or part of limestone mineral powder in the traditional asphalt concrete raw material; magnetic sand or silicon carbide sand is adopted for replacing all or part of natural aggregate in the traditional asphalt concrete raw material, wherein the weight of the magnetic powder accounts for 3-15% of the total weight of the composition; the weight of the magnetic sand or the silicon carbide sand accounts for 2-50% of the total weight of the composition; the weight of asphalt accounts for 5-10% of the total weight of the composition; the weight of the limestone mineral powder accounts for 0-5% of the total weight of the composition; and the weight of the natural aggregate accounts for 20-90% of the total weight of the composition, and the microwave-absorbing asphalt concrete pavement material composition is finally obtained. Compared with the traditional asphalt concrete, the microwave-absorbing asphalt concrete can improve the microwave heating rate by a plurality of times to dozens of times. The composition can greatly improve the microwave de-icing and snow-melting efficiency, and be extensively applied in a variety of asphalt concrete highway pavements, parking aprons of airports, factories, offices, schools, troops and other units for use.

Description

technical field [0001] The invention relates to the technical field of road pavement materials, in particular to a road asphalt concrete pavement material composition suitable for microwave absorption. Background technique [0002] As we all know, deicing roads in winter is of great significance to road transportation safety and smooth traffic. Microwave heating is an advanced technology for road deicing, and a lot of research has been done at home and abroad. [0003] The regeneration and maintenance of asphalt concrete pavement by microwave heating is also of great significance for saving road construction costs, prolonging the service life of road materials, energy saving and environmental protection. [0004] However, in the process of microwave heating of asphalt, the microwave heating efficiency is obviously low, which seriously limits the application and promotion of microwave heating technology in the field of pavement materials. The reason is that the electromagne...

Claims

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Application Information

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IPC IPC(8): E01C7/26C04B22/04C04B22/06
Inventor 赵鹏王振军艾涛
Owner CHANGAN UNIV
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