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Method for preparing road asphalt suitable for microwave heating

A technology for road asphalt and microwave heating, which is applied to building components, building insulation materials, buildings, etc., can solve the problems of low microwave heating efficiency, limited application and promotion of microwave heating technology, low efficiency of asphalt pavement materials, etc., and achieves improved microwave deicing. The effect of improved efficiency, heating efficiency and simple preparation process

Inactive Publication Date: 2010-06-09
CHANGAN UNIV
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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 asphalt material itself does not absorb microwaves, or absorbs very little microwaves, and itself is a poor conductor of heat, which leads to the inefficiency of microwave heating of asphalt pavement materials and other defects.

Method used

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preparation example Construction

[0021] A method for preparing road asphalt suitable for microwave heating, comprising the following steps:

[0022] (1) First select ferromagnetic powder, coupling agent and road asphalt suitable for microwave heating;

[0023] (2) Preparation of wave-absorbing agent, adding ferromagnetic powder and coupling agent to the trichlorethylene solution of low-concentration road asphalt and dispersing under the action of ultrasonic waves, heating the uniformly dispersed solution mixture to remove trichlorethylene, and obtaining asphalt An easily dispersible wave absorbing agent, the preparation method of the wave absorbing agent is to prepare a solution mixture with ferromagnetic powder, coupling agent, asphalt, and trichlorethylene according to the mass ratio of 1:0.001-0.03:0.01:2 , after half an hour of dispersion under the action of ultrasonic waves, trichlorethylene is removed at a temperature of 85°C to 95°C to obtain a wave absorbing agent;

[0024] (3) Add the wave absorbing...

Embodiment 1

[0030] Select 25 grams of carbonyl iron powder with a particle size of 3-5 microns, 0.5 grams of KH550 as a coupling agent, 0.25 grams of 90# asphalt material for road use, and 50 grams of trichlorethylene, add them to a 200 ml container and place them in an ultrasonic disperser After ultrasonic dispersion for half an hour, trichlorethylene was removed in a drying oven at 90° C. to obtain 26 grams of wave absorbing agent.

[0031] Add 26 grams of wave-absorbing agent and 100 grams of 90# road asphalt into the asphalt heating mixer equipment, stir and shear at 175 ° C for 10 minutes, cast and cool, and use the waveguide method at a microwave frequency of 0.9-6 GHz to measure The average permittivity is 15.6, the average permeability is 1.32, the dielectric loss tangent tgδ=0.04, and the magnetic loss tangent tgδ=0.13.

[0032] The penetration, ductility and softening point of the material all meet the quality requirements of road asphalt. At room temperature, the material was ...

Embodiment 2

[0034] Select 50 grams of carbonyl iron powder with a particle size of 3-5 microns, 1 gram of KH550 as a coupling agent, 0.5 grams of 90# asphalt material for road use, and 100 grams of trichlorethylene, add them to a 200 ml container and place them in an ultrasonic disperser After ultrasonic dispersion for half an hour, trichlorethylene was removed in a drying oven at 90° C. to obtain 52 grams of wave absorbing agent.

[0035] Put 52 grams of wave absorbing agent and 100 grams of 90# asphalt material for road into the asphalt heating and mixing equipment, stir and shear at 175°C for 10 minutes, after casting and cooling, the average The dielectric constant is 18.1, the average magnetic permeability is 1.47, the dielectric loss tangent tgδ=0.05, and the magnetic loss tangent tgδ=0.19.

[0036] The penetration, ductility and softening point of the material all meet the quality requirements of road asphalt. At room temperature, the material was heated in a microwave oven with a...

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Abstract

The invention discloses a method for preparing a road asphalt material suitable for microwave heating, which comprises the following steps of: selecting microwave heating ferromagnetic powder, a coupling agent and road asphalt; preparing a wave absorbing agent, namely adding the ferromagnetic powder and the coupling agent into solution of trichloroethylene, then dispersing the solution of the trichloroethylene under the action of ultrasonic waves, and heating the evenly-dispersed solution mixture to remove the trichloroethylene and obtain the wave absorbing agent; adding the wave absorbing agent and the road asphalt into an asphalt heating stirrer according to a mass ratio to perform high-speed shearing, and cooling the mixture to obtain the road asphalt material suitable for the microwave heating; and selecting the asphalt electromagnetic parameters to be in the range with the microwave frequency of 0.9 to 6 GHz. The road asphalt material is widely used in the fields of microwave road de-icing and snow melting, the heating of reproducible asphalt pavement materials and the like. The road asphalt material has a simple preparation process, greatly improves the microwave heating rate of the asphalt material, and contains 50 weight percent of the asphalt material absorbed by the microwaves, and the microwave heating rate is 60 times that of the asphalt material containing no microwave absorbing agent.

Description

technical field [0001] The invention relates to the field of preparation of road pavement materials, in particular to a method for preparing road asphalt suitable for microwave heating. 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 asphalt material itself does...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08K9/04C08K9/06C08K3/22C08K3/08
Inventor 赵鹏艾涛王振军
Owner CHANGAN UNIV
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