A smart material strain gauge for monitoring strain on asphalt pavement and its application

Abstract

The invention discloses a smart material strain gauge for monitoring the strain of an asphalt pavement and application. The smart material strain gauge includes a column-shaped bar and fixing components which are installed at two ends of the column-shaped bar and are used for fixing the column-shaped bar; a plurality of built-in electrodes are arranged in the column-shaped bar; the fixing ends are made of black nylon 66; the column-shaped bar is made of a nylon 66 matrix composite smart material; the outer side of the column-shaped bar is provided with an encapsulation layer; and molten nylon 66 and a conductive phase are mixed so as to prepare the nylon 66 matrix composite smart material, wherein the conductive phase is a mixture of one or a plurality of components selected from graphite, nickel powder, carbon nanotubes or carbon nanotubes of which the surfaces are plated with nickel. According to the smart material strain gauge for monitoring the strain of the asphalt pavement of the invention, the nylon 66 matrix composite smart material has excellent smart property, can convert strain conditions into electrical signals, is a core component of the strain gauge, can be applied to the detection of strain, and has high reliability and high accuracy; and the nylon 66 matrix composite smart material has excellent deformation compatibility with the asphalt concrete pavement and can accurately monitor the strain of the asphalt pavement.

Description

technical field [0001] The invention relates to a smart material strain gauge for monitoring asphalt pavement strain and its application, belonging to the field of road monitoring. Background technique [0002] Asphalt pavement is the main pavement structure in my country. Due to the complexity of asphalt pavement materials, structures, and construction techniques, mechanical analysis and on-site monitoring of asphalt pavement structures are very difficult, and it is difficult for pavement designers and users to accurately grasp the mechanical state of asphalt pavement. It is very unfavorable and leads to early damage to a large number of asphalt pavements, resulting in serious waste of engineering volume, adverse effects on traffic, and other social and environmental problems. Under the complex environment of temperature, humidity and vehicle load, the mechanical state of the asphalt concrete structural layer is very complicated. Accurately grasping the mechanical state o...

AI Technical Summary

Problems solved by technology

However, because traditional monitoring components need to be pre-embedded in asphalt concrete and rolled at high temperature, this special molding process and harsh working environment make the monitoring components have low survival rate and poor durability

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