Self-healing asphalt concrete based on microwave heating and containing metal fibers and preparation method of self-healing asphalt concrete

An asphalt concrete and microwave heating technology, which is applied in the field of concrete admixtures, can solve the problems of inconvenient road surface maintenance and increased maintenance expenditure, and achieve the effects of improving electrothermal performance, helping to melt ice and snow, and facilitating construction

Inactive Publication Date: 2015-12-16
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology cannot make concrete have good self-healing ability, which brings great inconvenience to the maintenance of the road surface, and increases the maintenance expenditure at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A self-healing metal fiber asphalt concrete based on microwave heating, made of the following raw materials in parts by weight: 60 parts of coarse aggregate, 30 parts of fine aggregate, 4 parts of finely ground steel slag powder filler, 4 parts of asphalt, and asphalt Composed of steel wool fibers with a volume of 2%, the length of the steel wool fibers is 2.5mm, and the diameter is 0.03642mm.

[0017] Preparation: Add steel wool fibers to the asphalt at 160°C and stir evenly, then mix evenly with coarse aggregate and fine aggregate heated to 170°C, then add finely ground steel slag filler and stir evenly to obtain a mixture, and the stirring time is 4 Minutes; the two sides of the above-mentioned mixture were compacted 75 times with a Marshall compaction instrument to obtain concrete.

Embodiment 2

[0019] A self-healing metal fiber asphalt concrete based on microwave heating, made of the following raw materials in parts by weight: 62 parts of coarse aggregate, 23 parts of fine aggregate, 5 parts of finely ground steel slag powder filler, 5 parts of asphalt, and asphalt 5% by volume of steel wool fibers, the length of the steel wool fibers is 2.5mm, and the diameter is 0.03642mm.

[0020] Preparation: Add steel wool fibers to asphalt at 165°C and stir evenly, then mix evenly with coarse aggregate and fine aggregate heated to 175°C, then add finely ground steel slag filler and stir evenly to obtain a mixture, and the stirring time is 5 Minutes; the above mixture was compacted 100 times with a rotary compactor to obtain concrete.

Embodiment 3

[0022] A self-healing metal fiber asphalt concrete based on microwave heating, made of the following raw materials in parts by weight: 70 parts of coarse aggregate, 20 parts of fine aggregate, 4 parts of finely ground steel slag filler, 4 parts of asphalt, and asphalt Composed of steel wool fibers with a volume of 2%, the length of the steel wool fibers is 2.5mm, and the diameter is 0.03642mm.

[0023] Preparation: Add steel wool fibers to asphalt at 170°C and stir evenly, then mix with coarse aggregate and fine aggregate heated to 180°C, then add finely ground steel slag filler and stir evenly to obtain a mixture, and the stirring time is 6 Minutes; the two sides of the above-mentioned mixture were compacted 75 times with a Marshall compaction instrument to obtain concrete.

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Abstract

The invention discloses self-healing asphalt concrete based on microwave heating and containing metal fibers. The self-healing asphalt concrete is prepared from raw materials in parts by weight as follows: 60-70 parts of coarse aggregate, 20-30 parts of fine aggregate, 4-6 parts of pulverized steel slag powder filler, 4-6 parts of asphalt and a conductive material accounting for 2%-5% of the volume of the asphalt. During preparation, steel wool fibers are added to the asphalt at the temperature of 160-170 DEG C and stirred uniformly, the mixture is stirred uniformly with the coarse aggregate and the fine aggregate which are heated to the temperature of 170-180 DEG C, then the pulverized steel slag powder filler is added and stirred uniformly, and a mixture is obtained; a Marshall compaction apparatus is used for compacting both sides of the mixture for 75 times respectively or a rotary compaction apparatus is used for compacting the mixture for 100 times, and the concrete is obtained. Compared with the prior art, the self-healing asphalt concrete based on microwave heating and containing the metal fibers has the advantages as follows: the formula is simple, the construction is convenient, the electrothermic performance and the pavement performance of an asphalt pavement are improved, especially the self-healing capacity of cracks is remarkably improved, ice and snow melting of the asphalt pavement in winter is facilitated, and the resource utilization rate of steel slag as solid waste is further increased.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a self-healing metal fiber asphalt concrete based on microwave heating and a preparation method thereof. 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. 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. [0003] However, in the process of microwave heating of asphalt concrete pavement, there is obviously a problem of low microwave heating efficiency, which seriously limits the application and promotion of microwave heating technology in the field of pavement materials. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B14/48
Inventor 熊锐陈华鑫盛燕萍关博文常明丰杨晓凯杨发熊鑫王璐
Owner CHANGAN UNIV
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