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Asphalt pavement material rapidly restored through microwave heating

A technology of asphalt pavement and microwave heating, which is applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc. It can solve the problems of low microwave absorption rate of asphalt mixture, expensive microwave absorber, and low efficiency of asphalt pavement , to achieve the effects of shortening microwave heating time, enhancing microwave absorption efficiency, and reducing microwave power consumption

Active Publication Date: 2016-11-09
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microwave heating of asphalt pavement is inefficient due to the low microwave absorption rate of asphalt mixture
Therefore, a certain proportion of microwave absorbers can be added to the mixture, such as dielectric materials, metal micropowder, ferrite, etc., but these microwave absorbers are usually more expensive and have a higher amount of doping

Method used

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  • Asphalt pavement material rapidly restored through microwave heating
  • Asphalt pavement material rapidly restored through microwave heating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In the first step, ordinary steel slag is converted into modified steel slag by co-precipitation method.

[0027] ① Weigh Fe with an electronic balance 2 o 3 Mass fraction is 20 parts of common steel slag of 20%, pours in the beaker;

[0028] 2. measure a certain amount of concentrated hydrochloric acid (hydrochloric acid concentration is 12mol / L) according to the steel slag amount taken by weighing; then hydrochloric acid is poured in the beaker that steel slag is housed;

[0029] ③According to the amount of concentrated hydrochloric acid, weigh the corresponding amount of FeCl 2 , the solid FeCl 2 Prepared into a 5mol / L solution;

[0030] ④The prepared FeCl 2 The solution is poured into a beaker containing steel slag and hydrochloric acid;

[0031] ⑤According to the amount of hydrochloric acid added, determine the amount of ammonia water, taking into account the resulting Fe 3 o 4 As much as possible, so the amount of ammonia water is between 1.5-2 times the t...

Embodiment 2

[0036] The first step is to convert ordinary steel slag into modified steel slag by carbon reduction method.

[0037] ① Select Fe 2 o 3 Ordinary steel slag with a mass fraction of 20%, according to the above reaction equation, the mass ratio of activated carbon and steel slag in the reaction process is 1:200. Weigh activated carbon and steel slag of appropriate quality according to the mass ratio of activated carbon and steel slag, and place them in a vacuum high-temperature electric furnace;

[0038] ②Pass nitrogen to isolate oxygen or air, heat the raw materials, and the reaction time is 30 minutes to make them fully react;

[0039] ③Repeat the above steps to convert enough steel slag fine aggregate.

[0040] In the second step, the obtained steel slag fine aggregates are screened to obtain fine aggregates that meet the gradation requirements. Select 90# matrix asphalt, basalt coarse aggregate, limestone powder and modified steel slag fine aggregate, and form asphalt mix...

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Abstract

The invention discloses an asphalt pavement material rapidly restored through microwave heating. Aggregates in the asphalt pavement can be partially or completely substituted by modified steel slag. The modified steel slag is obtained through partially or completely converting Fe2O3 on the surface of a raw material industrial solid waste common steel slag into magnetic Fe3O4 in a surface component conversion or modification mode. The modified steel slag is uniformly dispersed in the asphalt pavement to make the asphalt pavement have uniform microwave absorption capability and realizen a uniform heating effect. An asphalt film wrapped on the surface of the modified steel slag can rapidly recover fluidity in the microwave heating restoration process, so the microwave heating efficiency and the microwave restoration speed of the asphalt pavement are greatly improved. The wave absorption efficiency and the heating rate of the asphalt pavement are 2 or above times those of traditional asphalt pavements, the cost is low, and the maintenance and restoration effects and the working efficiency of the asphalt pavement are greatly improved.

Description

technical field [0001] The invention relates to an asphalt pavement, in particular to an asphalt pavement rapidly repaired by microwave heating. Background technique [0002] Due to factors such as the natural environment and vehicle loads, the asphalt pavement often suffers from structural looseness or even deformation. If it is not repaired in time, the speed of its destruction will be greatly accelerated. Once functional or structural damage occurs to the pavement, it is usually necessary to mill the pavement first, heat the old material and re-pave it. The traditional method is not only costly, but also the comfort level of the refurbished road surface will be significantly reduced due to the change of the mixture gradation. Practice has proved that if the asphalt pavement is quickly repaired regularly or at an appropriate time, the service life of the asphalt pavement can be effectively extended. Asphalt pavement is mainly composed of asphalt (including modified aspha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/14C04B20/02C04B26/26
CPCC04B20/04C04B26/26C04B2111/0075C04B20/023C04B18/142Y02W30/91
Inventor 王声乐杨炳缪鹏辉刘为江磊
Owner SOUTHEAST UNIV
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