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Pavement crack monitoring method based on conductive polymer pull-sensing effect

A conductive polymer and polymer technology, applied in the direction of electromagnetic measuring devices, electric/magnetic solid deformation measurement, instruments, etc., can solve the problems of low precision, high test cost, and backwardness, so as to reduce road cracking, reduce engineering quantity, The effect of saving money

Active Publication Date: 2016-06-08
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pavement cracking has always been the main failure form of pavement in my country, but the understanding of cracking mechanism still lags behind engineering practice, especially the research on crack evolution tracking test method and prediction and early warning technology is very little, although its importance has attracted people's great attention , but at present, the test of pavement cracks is mainly carried out after cracking, and internal cracks are tested by geological radar, which has low precision and cannot track the evolution and development of cracks, which delays the best timing of preventive maintenance
Some scholars also use fiber grating technology to test the deformation of the road surface, but the cost of testing is high, which is not conducive to large-scale testing

Method used

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  • Pavement crack monitoring method based on conductive polymer pull-sensing effect
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  • Pavement crack monitoring method based on conductive polymer pull-sensing effect

Examples

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example 1

[0021] Example 1: Monitoring and early warning of pavement cracking caused by reflective cracks

[0022] During road construction, the conductive polymer 2 filled with carbon nanotubes is spread between the surface layer 3 and the base layer 1, and compacted by rolling machinery. Due to the high temperature during asphalt paving, the surface of the conductive polymer 2 needs to be coated with a layer of waterproof and high-temperature resistant coating. The wires that are in good contact with the conductive polymer are drawn out at certain distances, and in order to prevent the wires from being damaged, a layer of anti-corrosion insulation is wrapped. Connect the wires to the megohmmeter. When there are signs of cracking on the road surface, the conductive polymer 2 will be specifically manifested as: the conductive polymer itself is deformed by an external force, resulting in a change in its own resistivity. The resistivity of the polymer changes, so as to locate the potenti...

example 2

[0023] Example 2: Monitoring and early warning of surface cracking on main roads in cities

[0024] For urban roads, under the repeated action of vehicles and environmental loads on the pavement, repairing and maintaining once cracks appear will increase the maintenance cost. Therefore, conductive polymer 2 can be laid under the asphalt layer 4 during construction, and lead out and Conductive polymer 5 is a well-connected and firm wire, using the sensitivity of conductive polymer 5 as a technical means of self-detection, such as image 3 shown. Because the temperature is higher when the asphalt layer 4 is laid, the conductive polymer 2 needs to be coated with a high-temperature-resistant waterproof coating. Due to mechanical rolling during construction, the asphalt layer 4 is in good contact with the conductive polymer 2. When the asphalt layer 4 has a tendency to open due to repeated loads, the conductive polymer 2 will be affected by external forces, and its own resistivity...

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Abstract

The invention discloses a pavement cracking monitoring method based on the pulling sensitive effect of conducting polymers. The pavement cracking monitoring method particularly includes the steps that the surfaces of conducting polymers are additionally coated by a damp-proof high-temperature-resistant protective coating; the relation between the tensile strain value of the conducting polymers and the resistivity of polymers is measured, and when the resistivity of the polymers dose not change, the measured tensile strain value of the conducting polymers is the allowable tensile strain value of the conducting polymers; when a pavement is paved, the conducting polymers are paved in the pavement, and wires which make good contact with the polymers are led from the conducting polymers; the resistance of the conducting polymers is measured in real time, and the actual tensile strain value of the conducting polymers is determined; the actual tensile strain value of the conducting polymers is compared with the allowable tensile strain value of the conducting polymers, and if the actual tensile strain value is higher than the allowable tensile strain value of the polymers, the pavement is likely to crack, and preventive maintenance measures are taken to the pavement. By the adoption of the pavement cracking monitoring method, the situation that people discover cracks of the pavement after the pavement is cracked can be avoided, a large amount of money is saved, and the project amount is reduced.

Description

technical field [0001] The invention relates to a method for monitoring pavement cracking, in particular to a method for monitoring pavement cracking based on the pull-sensitivity effect of conductive polymers. Background technique [0002] In existing roads, the occurrence rate of pavement diseases is relatively high, among which pavement cracks account for a very high proportion. Pavement cracking has always been the main failure form of pavement in my country, but the understanding of cracking mechanism still lags behind engineering practice, especially the research on crack evolution tracking test method and prediction and early warning technology is very little, although its importance has attracted people's great attention , but at present, the test of pavement cracks is mainly carried out after cracking, and internal cracks are tested by ground radar, which has low accuracy and cannot track the evolution and development of cracks, which delays the best timing of preven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/16G08C17/02
Inventor 崔新壮隋伟杨为民张炯高智珺张娜
Owner SHANDONG UNIV