Monitoring device for performance of concrete in salt-freezing environment

Abstract

The invention discloses a monitoring device and method for the performance of concrete in a salt-freezing environment. The device includes four stainless steel electrodes, six chloride ion selective electrodes and a reference electrode installed on a base, wherein the stainless steel electrode is in the form of Square distribution, the installation height of the chloride ion selective electrode is gradient distribution, the measuring end of the reference electrode faces the chloride ion selective electrode, and each electrode is connected to the monitoring center. The method uses stainless steel electrodes to measure the change of the internal resistivity of the concrete to monitor the internal freeze-thaw damage of the concrete; uses the reference electrode and the chloride ion selective electrode to calculate the chloride ion content in the pore fluid, and judge the intrusion of chloride ions into the concrete Sharpness, and processed by the monitoring center. The invention can realize on-line monitoring of the internal damage degree of the concrete and the intrusion sharpness of the chloride ion concentration in the salt-freeze environment.

Description

technical field [0001] The invention relates to the technical field of non-destructive monitoring of concrete, in particular to a device and method for real-time on-line monitoring of concrete properties in a salt-freeze environment. Background technique [0002] Concrete structures such as highways, bridges, and dams in the alpine regions of Northeast my country, North China, and Northwest China often encounter different degrees of freeze-thaw damage. In addition, these areas often use deicing salt to melt snow and deicing. Therefore, concrete components in these areas are often in a salt-freeze environment. [0003] Concrete in a salt-freezing environment suffers from freeze-thaw damage on the one hand and chloride salt intrusion on the other. For concrete buildings in a salt-freezing environment, it is necessary to monitor the internal damage of the concrete and the intrusion of chloride salts in real time to ensure the safe operation of the concrete buildings. So far,...

AI Technical Summary

Problems solved by technology

So far, there has not been a method that can monitor the internal damage of concrete in a salt-freeze environment and the intrusion front of chloride concentration in real time.

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