Rapid identification method for macro-cell corrosion control modes of reinforcing steel bars in marine concrete
A marine concrete and corrosion control technology, which is applied in the fields of weather resistance/light resistance/corrosion resistance, instruments, measuring devices, etc., can solve the problems of many electrochemical parameters and complicated judgment process, and achieve simplified judgment process, convenient detection operation, The effect of the analysis process is simple and clear
Active Publication Date: 2021-08-13
TIANJIN PORT ENG INST LTD OF CCCC FIRST HARBOR ENG +2
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[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, solve the problem in the prior art that the judgment process of the steel macro cell corrosion control mode in the marine concrete structure is complicated and involves many electrochemical parameters, and provides a simple concrete A rapid identification method for the corrosion control mode of steel bar macrocells in structures
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[0022] The present invention will be described in further detail below in conjunction with accompanying drawing and specific embodiment
[0023] Firstly, the macro cell corrosion test is carried out to determine the macro cell corrosion control mode. Concrete structures are poured and formed, the concrete strength grade is not less than C30, the water-binder ratio is not more than 0.55, the amount of mineral admixtures is less than 60% of the total amount of cementitious materials, and the thickness of the protective layer of steel bars in the concrete structure is not less than 40mm. Change the content of chloride ions in concrete by directly adding chloride ions during mixing and infiltrating chloride ions from the outside after hardening, so that the cathode steel bars and the anode steel bars exhibit different electrochemical parameters in order to simulate different macro cell corrosion state.
[0024]In the concrete structure, the area ratio of the cathode reinforcement...
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Abstract
The invention discloses a rapid identification method formacro-cell corrosion control modes of reinforcing steel bars in marinae concrete. The rapid identification method comprises the following steps of measuring a cathode reinforcing steel bar corrosion potential Emi-c before macro-cell corrosion and an anode reinforcing steel bar corrosion potential Emi-a before macro-cell corrosion in a concrete structure, and calculating a macro cell potential difference delta Ecorr1 between a cathode reinforcing steel bar and an anodereinforcing steel bar, wherein a boundary relational expression of the macro-cell corrosion control modes is Emi-c=0.5*(delta Ecorr1)-b, b is a constant, when b is 382, the boundary is a boundary for converting a cathode reinforcing steel bar control mode into a mixed control mode, and when b is 496, the boundary is a boundary for converting the mixed control mode into an anode reinforcing steel bar control mode. According to the rapid identification method, related electrochemical parameters are few, detection operation is convenient, the analysis process is simple, the control modes of macro-cell corrosion are classified and partitioned, and the macro-cell corrosion control modes of the reinforcing steel bars in concrete in all corrosion environments can be rapidly judged.
Description
technical field [0001] The invention belongs to the technical field of steel bar corrosion protection, and in particular relates to a method for quickly identifying the corrosion control mode of a steel bar macro cell in marine concrete. The method greatly simplifies the determination process of the macro cell corrosion control mode. Background technique [0002] The long life of newly-built and active marine reinforced concrete structures is the focus of attention and research in current engineering construction and operation and maintenance. Realizing and guaranteeing the long-life service of marine reinforced concrete structures mainly starts from the aspects of durability design, construction and maintenance, and controls the performance degradation of concrete materials and inhibits the corrosion of steel bars. For marine reinforced concrete structures, the durability problems caused by steel corrosion are particularly significant. The durability problem caused by stee...
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IPC IPC(8): G01N17/02G01N17/00
CPCG01N17/02G01N17/006
Inventor 曹忠露苏忠纯李沛王娜张鹏周晓朋周佰祥雷周米胜东陈浩宇
Owner TIANJIN PORT ENG INST LTD OF CCCC FIRST HARBOR ENG
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