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Self-sensing intelligent conductive asphalt pavement material

A technology of conductive asphalt and pavement materials, which is applied in the field of self-sensing intelligent conductive asphalt pavement materials, and can solve problems such as the complex stress mode of internal particles in the law of stress transfer

Inactive Publication Date: 2021-07-30
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, asphalt mixture is a multiphase particle system, and its stress transfer law and internal particle stress mode are very complex under the action of traffic load.

Method used

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  • Self-sensing intelligent conductive asphalt pavement material
  • Self-sensing intelligent conductive asphalt pavement material
  • Self-sensing intelligent conductive asphalt pavement material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like figure 1 The shown self-sensing intelligent conductive asphalt pavement material includes an asphalt mixture 1 and a first conductive material 2 distributed in the asphalt mixture 1 and added in an amount of 0.3 wt%. The asphalt mixture 1 adopts AC-13 gradation, the No. 70 A grade road petroleum asphalt content is 4.9wt%, the asphalt softening point is 47.5°C, and the penetration is 67 (0.1mm); the first conductive material 2 is carbon nanofiber. The surface of the coarse aggregate 5 in the asphalt mixture 1 is also covered with a conductive cement-based coating 4, and forms a smart aggregate unit 3, such as figure 2 shown. The thickness of the conductive cement-based coating 4 is ~2mm, and it is obtained by coagulation and hardening of commercially available P.O.42.5 ordinary Portland cement slurry (ie, cementitious material) mixed with a second conductive material; wherein, the water-cement ratio of the slurry is 0.35; The second conductive material is multi-l...

Embodiment 2

[0033] A self-sensing intelligent conductive asphalt pavement material of this embodiment is prepared by adding 0.5wt% of the first conductive material 2 to the asphalt mixture 1; wherein the first conductive material 2 is nano-carbon fiber, and the addition amount is 0.5wt%; used Asphalt mixture 1 adopts SMA-13 ​​gradation, in which the content of SBS modified asphalt is 5.6wt%, the softening point of SBS modified asphalt (Type I-D) is 72.0°C, and the penetration is 54 (0.1mm). The conductive cement-based coating 4 in the intelligent aggregate unit 3 has a thickness of ~1 mm, and is obtained by coagulating and hardening the commercially available P.O.52.5 ordinary Portland cement slurry (ie, cementitious material) mixed with a second conductive material; wherein, the slurry The volume water-cement ratio is 0.35; the second conductive material is carbon nanofiber, and the dosage is 2.0wt%.

[0034] According to the above technical requirements, the asphalt mixture 1 specimen w...

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Abstract

The invention relates to a self-sensing intelligent conductive asphalt pavement material which is prepared from an asphalt mixture and a first conductive material doped in the asphalt mixture, wherein the surface of coarse aggregate used in the asphalt mixture is further coated with a conductive cement-based coating, and an intelligent aggregate unit is formed. Compared with the prior art, intelligent monitoring of road surface dynamic response under the vehicle load effect can be achieved, self-sensing of stress strain, cracks and other road surface structure service information is achieved, and the material has the advantages of being low in price, easy to implement, accurate in monitoring and the like.

Description

technical field [0001] The invention belongs to the technical field of road engineering and relates to a self-sensing intelligent conductive asphalt pavement material. Background technique [0002] Intelligent pavement has become a key research field and direction of future road construction technology because it can widely serve traffic safety and public safety, and can realize the characteristic analysis of pavement structure and health monitoring information. Therefore, countries all over the world are actively conducting related research and application. Relying on information perception and result analysis, intelligent pavement materials can monitor and evaluate changes in pavement information and structural health monitoring. [0003] At present, domestic research on smart pavements is mostly limited to external sensors. The embedding of sensors occupies a large amount of pavement structure space, destroys the integrity of the road structure, and has low work efficien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B20/10C04B111/94
CPCC04B26/26C04B20/1077C04B2111/0075C04B2111/00991C04B2111/94C04B14/386C04B14/00C04B20/1055C04B20/1014
Inventor 蒋正武谢明君徐玲琳温宇彤吴凯王中平
Owner TONGJI UNIV
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