Precisely regulated system and method for accelerated corrosion of rebar

Abstract

The invention discloses an accurately regulated and controlled reinforced steel bar rusting accelerating system and method. The system comprises a test piece, a non-woven fabric, a silver plate, a constant-temperature and constant-humidity box and a power supply, wherein a reinforced steel bar is arranged in the test piece; the silver plate is arranged on the outer side of a concrete part of the test piece; the tip of the upper part of the silver plate is folded towards the outer side by an angle of 90 degrees to form a folding end; and the inner side and the outer side of the silver plate are closely wound by the non-woven fabric. The method comprises the following steps: soaking the test piece and the non-woven fabric in a NaCl solution and then taking out the test piece and the non-woven fabric; closely winding the concrete part by using the non-woven fabric, after placing the silver plate on the concrete part, continuing winding the concrete part by using the non-woven fabric to fix the silver plate, and binding a non-woven fabric region by using a rubber band; placing the bound test piece in the constant-temperature and constant-humidity box, connecting one end of the silver plate with a negative pole of the power supply, connecting the reinforced steel bar with a positive pole of the power supply, and switching on the power supply; and stopping electrification every once in a while, carrying out related test, and switching on the power supply after the test. By the method, small corrosion current can be controlled accurately, the corrosion degree of the reinforced steel bar is quantified accurately, the temperature and the humidity are controlled to guarantee the type of corroded products and rusting and expansion cracking time, the form is controllable, and loss of the corroded products is avoided.

Description

technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to a precisely regulated steel bar accelerated corrosion system and a preparation and use method thereof. Background technique [0002] There are two main environmental factors that lead to the corrosion of steel bars: carbonization and chloride ion corrosion. Among them, chloride ion corrosion has a more significant impact on the corrosion of steel bars, especially for coastal areas and areas where deicing salt is used, which is caused by chloride salts. Corrosion takes less time than corrosion caused by carbonization. In order to study the mechanism of steel bar corrosion caused by chloride salts more thoroughly, so far, a large number of researchers at home and abroad have obtained actual or close to actual steel bar corrosion components through various methods, and the most commonly used method is accelerated corrosion. . [0003] At present, there are several diff...

AI Technical Summary

Problems solved by technology

It overcomes the defect that the current existing methods cannot control the time and development speed of cracks due to the loss of a large amount of corrosion products due to the test block being fully or half-immersed in sodium chloride solution

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