Method for testing control of accelerating corrosion of steel reinforcement in chlorine salt corrosion concrete

Abstract

The invention relates to a method for testing the control of accelerating corrosion of steel reinforcement in chlorine salt corrosion concrete. The method adopts a multi-channel DC regulated power supply, a standard testpiece for controlling the accelerating corrosion of the steel reinforcement in concrete, a chlorine salt solution test box, chlorine salt solution, a test live wire and an electrochemical reaction cathode steel reinforcement plate for testing; and in the testing, the control of corrosion degrees of a plurality of steel reinforcements in the same environmental condition is realized by controlling the current density, voltage and time on the surfaces of the steel reinforcements, and test parameters and test results corresponding to different corrosion degrees of the steel reinforcements are obtained. Compared with the prior art, test equipment required by the method has convenient installation, strong controllability, and completes a single test in a short period; the testpiece is easy to manufacture, and has small occupied space and low cost; and the method has better operability and promoting applicability in controlling the corrosion speed and corrosion quantity of the steel reinforcements in a concrete structure in a total life cycle.

Description

Technical field [0001] The invention relates to civil engineering, in particular to a test method for the accelerated corrosion control of steel bars in chloride corrosion concrete. Background technique [0002] The phenomenon of building structure not reaching the designed service life, premature cracking and damage is common in civil building structures, bridges, tunnels and port structures. Predicting and evaluating structural life in the initial stage of design and construction is not only a requirement for the development of engineering construction practice, but also an objective need for the transformation of engineering design concepts from passive control to active control. It has important economic significance and practical value. [0003] Corrosion of steel bars in concrete structures is a chemical reaction process that continues to develop during the life cycle of concrete structures. Under natural environmental conditions, this process takes decades or even hundreds o...

AI Technical Summary

Problems solved by technology

At present, for the corrosion test of steel bars in concrete under chloride corrosion environment, there are mainly exposure test method and accelerated corrosion method. It takes a relatively short time to realize the corrosion of concrete steel bars, but judging from the current test situation, this method has poor operability for controlling the corrosion rate and amount of steel bar corrosion in the whole life cycle of concrete structures, and the test parameters, content and The steps are inconsistent

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