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Self-powered multifunctional piezoelectric intelligent aggregates for asphalt pavement, and preparation method thereof

A piezoelectric smart aggregate, asphalt pavement technology, applied in the direction of material impedance

Inactive Publication Date: 2019-01-11
XI AN JIAOTONG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing piezoelectric smart aggregate damage detection technologies serve concrete structures, and there are few researches on piezoelectric smart aggregates suitable for asphalt pavement.

Method used

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  • Self-powered multifunctional piezoelectric intelligent aggregates for asphalt pavement, and preparation method thereof
  • Self-powered multifunctional piezoelectric intelligent aggregates for asphalt pavement, and preparation method thereof
  • Self-powered multifunctional piezoelectric intelligent aggregates for asphalt pavement, and preparation method thereof

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preparation example Construction

[0049] The present invention also provides a preparation method of self-powered multifunctional piezoelectric intelligent aggregate for asphalt pavement described in the above technical solution, comprising the following steps:

[0050] Piezoelectric ceramics PZT 5-X and epoxy resin are sequentially mixed, hot-pressed and polarized to obtain piezoelectric materials for pavement;

[0051] Bonding the piezoelectric material for pavement on one side of the copper foil substrate with conductive glue to obtain a piezoelectric device for pavement;

[0052] Welding shielding wires on the piezoelectric device for road use;

[0053] Mix epoxy resin 6200A, curing agent 6200B and quartz powder to obtain packaging material, place the packaging material in a silicone mold, then put the road surface welded with shielded wires with a piezoelectric device, and then put the packaging material until it is flush with the silicone mold;

[0054] Standing and solidifying at normal temperature, r...

Embodiment 1

[0067] The piezoelectric material for roads is composed of 35wt% PZT 5-X and 65wt% epoxy resin, and is formed into a cylinder with a diameter of 20mm and a thickness of 2mm by hot pressing and polarization; the hot pressing conditions are as follows: temperature 100°C, pressure 13MPa, time 2min; Polarization conditions are: Polarization electric field strength 3kV / mm, Polarization temperature 130℃, Polarization time 15min; The circuit uses a piezoelectric cylinder and a brass substrate with a diameter of 22mm and a thickness of 3mm to be bonded together through conductive glue , to form a piezoelectric device for road use; mix epoxy resin glue 6200A, curing agent 6200B, and quartz powder at a ratio of 3:1:1.5 to form a packaging material, place the packaging material in a silicone mold, and then weld the The pavement with shielded wires is put in with a piezoelectric device, and then the packaging material is put in until it is flush with the silicone mold, and it is cured at r...

Embodiment 2

[0069] The piezoelectric material for roads is composed of 45wt% PZT 5-X and 55wt% epoxy resin, and is formed into a cylinder with a diameter of 20mm and a thickness of 2mm by hot pressing and polarization; the hot pressing conditions are as follows: temperature 100°C, pressure 13MPa, time 2min; Polarization conditions are: Polarization electric field strength 3kV / mm, Polarization temperature 130℃, Polarization time 15min; The circuit uses a piezoelectric cylinder and a brass substrate with a diameter of 22mm and a thickness of 3mm to be bonded together through conductive glue , to form a piezoelectric device for road use; mix epoxy resin glue 6200A, curing agent 6200B, and quartz powder at a ratio of 3:1:1.5 to form a packaging material, place the packaging material in a silicone mold, and then weld the The pavement with shielded wires is put in with a piezoelectric device, and then the packaging material is put in until it is flush with the silicone mold, and it is cured at r...

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Abstract

The invention provides self-powered multifunctional piezoelectric intelligent aggregates for an asphalt pavement, and belongs to the field of health monitoring of asphalt pavements. According to the self-powered multifunctional piezoelectric intelligent aggregates for the asphalt pavement in the invention, the modulus after epoxy resin is cured is approximately equal to the asphalt pavement; the piezoelectric intelligent aggregates encapsulated by the epoxy resin 6200A have a certain strength and durability; the piezoelectric intelligent aggregates have good coupling performance with the pavement, and can be used in the asphalt pavement for a long time; furthermore, the piezoelectric intelligent aggregates do not influence the pavement performance of the pavement; micro-fracture damage monitoring can be carried out in the asphalt pavement; furthermore, an encapsulation container is prepared from the epoxy resin 6200A, a curing agent and quartz powder together; the encapsulation container has high surface hardness and resists corrosion, aging and hot and cold impact; due to encapsulation protection, influence of factors, such as the temperature and the humidity, on a signal measurement result can be weakened or eliminated; interference of an external environment on driving signals and sensing signals can be effectively overcome; therefore, a measurement result is relatively accurate; and simultaneously, the self-powered multifunctional piezoelectric intelligent aggregates in the invention are low cost, simple in structure and steady in performance, and can be widely used inthe asphalt pavement.

Description

technical field [0001] The invention relates to the technical field of asphalt pavement health monitoring, in particular to a self-powered multifunctional piezoelectric intelligent aggregate for asphalt pavement and a preparation method thereof. Background technique [0002] As the main pavement type of highways and urban roads, the quality and performance level of asphalt pavement is the basis for ensuring fast, comfortable and safe traffic. Under the cyclic coupling effect of long-term driving load and environmental factors, damage problems such as microcracks and interface detachment gradually appear on the asphalt pavement; The level of service is unsatisfactory. In the initial stage, the geometric size of asphalt pavement damage is micron or even smaller. Under the continuous action of factors such as stress concentration and moisture, the damage that was originally independent of each other gradually expands and penetrates to form macroscopic diseases. Domestic and f...

Claims

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Application Information

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IPC IPC(8): G01N27/02
CPCG01N27/02
Inventor 侯月琴陈云周泽洪纪小平甄逸康
Owner XI AN JIAOTONG UNIV
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