Corrosion Evaluation by Estimating the Surface Resistivity of Reinforcing Bar

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概要

• 論文の詳細を見る

• The corrosion rate of steel embedded in concrete is evaluated using polarization resistance assumed on the boundary between concrete and steel. However, the previously established polarization resistance method requires the removal of the concrete cover to connect the steel with a wire lead, and it takes a long time for the measurement of corrosion. This study proposes a new method for the nondestructive testing of deterioration caused by corrosion in concrete structures by estimating the surface resistivity of steel. For this purpose, the resistivity on the surface of a steel bar is assumed to behave similarly to the polarization resistance with the progress of corrosion. The resistivity of the steel surface is estimated using the resistivity estimation model (REM), and it is used as an index of the corrosion state. The REM is a mathematical model that considers geometric factors influencing the measurement, such as the cover depth, reinforcement radius, and electrode interval, and it can be used to estimate the resistivities of the concrete and steel bar in concrete structures. In addition, the possibility of applying this resistivity estimation method is investigated by performing an experiment on the accelerated corrosion of steel.

• 公益社団法人 日本コンクリート工学会の論文

著者

• SHIN SungWoo

  School of Architecture & Architectural Engineering, Hanyang University

• Noguchi Takafumi

  Department Of Architecture Faculty Of Engineering The University Of Tokyo

• Shin SungWoo

  School of Architecture and Architectural Engineering, Hanyang University, South Korea.

• Lim Young-Chul

  Department of Architecture, Catholic University of Daegu, South Korea.

関連論文

• Corrosion Resistance of Cr-bearing Rebar to Macrocell Corrosion Caused by Concrete Cover Crack
• Corrosion Resistance of Cr-bearing Rebar in Concrete with Chloride Ion Content
• Evaluation of Mechanical Performance of Corroded Reinforcement Considering the Surface Shape
• Investigation on Mechanical Behaviors for Bolted Connections in Carbon Steel and in Stainless Steel Using FEM
• Formulation of a Nondestructive Technique for Evaluating Steel Corrosion in Concrete Structures
• Mathematical Modeling for Corrosion Environment Estimation Based on Concrete Resistivity Measurement Directly above Reinforcement
• Corrosion Inhibition by Cr-bearing Rebar in Concrete Due to Combined Deterioration of Carbonation and Chloride Attack
• Corrosion Resistance of Cr-bearing Rebar in Macrocell Corrosion Environments Due to Different Concentrations of Chloride Ions
• Corrosion Evaluation by Estimating the Surface Resistivity of Reinforcing Bar

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