Real-time monitoring sensor for durability of concrete structures and fabricating method thereof

Abstract

The invention discloses a real-time monitoring sensor for durability of concrete structures. The real-time monitoring sensor comprises a sensor shell, and further comprises a reference electrode, a rebar electrode, an auxiliary electrode, a chlorion probe, a pH probe and a concrete resistivity probe. The auxiliary electrode is laid on the upper surface of the shell, at least parts of the reference electrode, the rebar electrode, the chlorion probe, the pH probe and the concrete resistivity monitoring probe are exposed out of the upper surface of the sensor shell to serve as detecting ends, and the other ends are connected with copper cables which penetrate through the sensor shell from top to bottom and stretch out of the shell. According to the real-time monitoring sensor, not only corrosion rate, chlorion concentration and pH of rebar, but also concrete resistivity can be monitored in real time; further, system resistance can be compensated during the monitoring of rebar corrosion current density, and corrosion rate of rebar can be monitored more accurately by the monitoring of concrete resistance.

Description

technical field [0001] The invention relates to the technical field of corrosion and protection of reinforced concrete structures, in particular to a long-acting, nondestructive and multifunctional sensor capable of real-time monitoring of the durability of concrete structures. technical background [0002] Chloride ion intrusion and concrete carbonation cause corrosion of steel bars is the most important reason for the decline in the durability of concrete structures, which seriously threatens the service safety of concrete structures. Therefore, it is of great practical significance to closely understand the chemical environment, corrosion state and corrosion rate of steel bars in order to ensure the scientific maintenance of reinforced concrete structures, evaluate the remaining service life, and evaluate the safety and durability of structures. [0003] The traditional method of evaluating the durability of concrete structures mainly adopts the method of sampling drill p...

AI Technical Summary

Problems solved by technology

The invention patent does not compensate the system resistance when using the linear polarization method to monitor the corrosion rate of steel bars, and the monitoring results cannot truly and accurately reflect the corrosion rate of steel bars

In addition, the reference electrode is the core of the monitoring system, and the invention uses MnO 2 Reference electrode, the reference electrolyte is liquid, using liquid electrolyte, ions are easily transported in the liquid, which cannot effectively reduce the loss of electrolyte, affecting the stability and service life of the reference electrode

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