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Electromagnetic wave absorption fiber asphalt mixture for asphalt pavement and preparation method of electromagnetic wave absorption fiber asphalt mixture

A technology of asphalt mixture and fiber absorption, which is applied in the field of road asphalt materials, can solve the problems of energy waste, high microwave power consumption, and long heating time, and achieve the effects of reducing costs, improving conversion efficiency, and reducing consumption

Inactive Publication Date: 2014-05-14
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the general asphalt mixture absorbs only -2dB, that is, it can only absorb 40% of its energy. As a result, the existing microwave heating of asphalt mixture has a long heating time, and the heating of the unit area of ​​the road consumes a lot of microwave power and serious energy waste. The problem

Method used

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Examples

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Effect test

preparation example Construction

[0032] The method for preparing electromagnetic wave-absorbing fiber asphalt mixture for asphalt pavement is characterized in that it includes the following steps: first weigh fiber absorbent, asphalt, mineral powder and crushed stone according to the proportion of ingredients, and set aside; then mix at 130°C-190°C Under high temperature, the conductive fiber is mixed into mineral powder and crushed stone for dry mixing, and then asphalt is added for mixing, and the electromagnetic wave absorption fiber asphalt mixture for asphalt pavement is prepared.

[0033] The characteristics of the electromagnetic wave absorbing fiber asphalt mixture for asphalt pavement are: within the microwave frequency range of 1.0-6.0GHz, the microwave reflectance is lower than -7dB when the room temperature is below 25°C and the mixture thickness is 5cm.

Embodiment 1

[0035] Mixture gradation type: AC~13

[0036] First, weigh the components according to the weight ratio of steel fiber: asphalt: mineral powder: crushed stone is 0.3:4.7:8:87; the technical requirements for steel fiber are: length less than 3cm, resistivity 10 -6 -10 -10 Ω·cm.

[0037] At a mixing temperature of 130°C to 190°C, dry mix steel fibers into mineral powder and crushed stones, then add asphalt and mix evenly, then the electromagnetic wave absorbing fiber asphalt mixture for asphalt pavement can be prepared.

[0038] The stability of the embodiment is tested according to JTGF40-2004 "Technical Specifications for Construction of Highway Asphalt Pavement". The electromagnetic parameters of asphalt mixture were tested by rectangular waveguide method. The reflectance of asphalt mixture is measured by the rectangular waveguide method, and the electromagnetic parameters are calculated according to the principle of transmission line. The Marshall stability of the electr...

Embodiment 2

[0042] Mixture gradation type: AC~13

[0043] First, weigh the components according to the weight ratio of carbon fiber: asphalt: mineral powder: crushed stone is 0.4:5.6:9:85; the technical requirements of carbon fiber are: the length is less than 3cm, and the resistivity is 10. -1 ~10 -3 Ω·cm.

[0044] At a mixing temperature of 130°C to 190°C, dry mix carbon fiber into mineral powder and crushed stone, then add asphalt and mix evenly, then the electromagnetic wave absorbing fiber asphalt mixture for asphalt pavement can be prepared.

[0045] The stability of the embodiment is tested according to JTGF40-2004 "Technical Specifications for Construction of Highway Asphalt Pavement". The Marshall stability of this material is 8.52kN, and other technical indicators meet the quality requirements of road asphalt mixture. The electromagnetic parameters of the mixture were tested by the rectangular waveguide method. The reflectivity of the mixture can be calculated from the elect...

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Abstract

The invention relates to a road asphalt material technology and discloses an electromagnetic wave absorption fiber asphalt mixture for an asphalt pavement and a preparation method of the electromagnetic wave absorption fiber asphalt mixture. The electromagnetic wave absorption fiber asphalt mixture comprises the following components in percentage by weight: 0.1-0.8 percent of a fiber absorbent, 4-6 percent of asphalt, 4.9-7.2 percent of mineral powder and 86-91 percent of gravels. The preparation method of the electromagnetic wave absorption fiber asphalt mixture for the asphalt pavement comprises the following steps of weighing electromagnetic wave absorption fibers, the asphalt, the mineral powder and the gravels according to a ratio for later use; under the stirring temperature of 130-190 DEG C, doping the electromagnetic wave absorption fibers into the mineral powder and the gravels and dry-stirring; and adding the asphalt and stirring to obtain the electromagnetic wave absorption fiber asphalt mixture.

Description

technical field [0001] The invention relates to road asphalt material technology, in particular to an electromagnetic wave absorbing fiber asphalt mixture for asphalt pavement and a preparation method thereof. Background technique [0002] Microwave maintenance of asphalt pavement is to use the heating principle of microwave to heat asphalt concrete to soften it. After reaching the temperature required for construction, the asphalt pavement is repaired. Microwave heating can be heated to deep layers, and can efficiently repair pits, looseness, rutting and other diseases, and effectively solve problems such as longitudinal weak joints and transverse weak joints that seriously affect the quality of maintenance, making road maintenance more convenient. [0003] Microwave deicing and snow removal on asphalt pavement uses microwaves to heat the pavement material through the ice layer. After absorbing the microwave, the temperature of the pavement material rises, melting the ice l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B14/38C04B14/48
Inventor 关博文丁冬海陈拴发盖卫鹏熊锐何锐
Owner CHANGAN UNIV
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