Device and method for in-situ evaluation of durability of in-service reinforced concrete structure

Abstract

The invention discloses a device and a method for in-situ evaluation of the durability of an in-service reinforced concrete structure. The device comprises a cylindrical shell made of plastic deformable materials, an expansion rubber plug, a reference electrode and a plurality of working electrodes made of the same materials as a structure steel bar, wherein the working electrodes are externally coated with insulating rubber rings, the cylindrical shell is provided with an upward opened inverted cone rubber plug hole configured to be screwed into the expansion rubber plug, a strip-shaped groove capable of accommodating the reference electrode and a plurality of mutually independent working electrode holes which are positioned on the same vertical surface, the blind end of the strip-shapedgroove and the blind end of the working electrode holes are provided with wire holes used for leading out a reference electrode wire and a working electrode wire, and the reference electrode wire andthe working electrode wire are connected to a sensor circuit. The device and the method for in-situ evaluation of the durability of an in-service reinforced concrete structure have the characteristicsof miniaturization, simple and convenient installation, long-acting property, economy, applicability and the like.

Description

technical field [0001] The invention relates to the technical field of corrosion and protection of reinforced concrete structures, in particular to a device for evaluating the durability and predicting the remaining life of reinforced concrete structures in service under the condition of chloride salt corrosion. [0002] technical background [0003] Reinforced concrete structures are widely used in various infrastructures such as roads, bridges, docks, tunnels, etc. due to the advantages of strong material and simple construction. However, reinforced concrete structures are faced with a variety of severe corrosion environments, especially reinforced concrete facilities under chloride corrosion conditions are in severe corrosion environments. The long-term service performance of structures deteriorates, resulting in a significant decline in the safety and usability of structures. In addition, corrosion also causes greater economic losses. Professor Sitter used the "five-fol...

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Problems solved by technology

However, the remaining life prediction through these life prediction models is generally based on the regular sampling and testing data of the physical structure of the engineering site, and the analysis and evaluation of the durability data through sensor monitoring has not been applied at present. The reason is that the existing durability sensor monitoring data is scientific, Reasonability, long-term effectiveness, etc. are questionable

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