| Summary: | 碩士 === 國立中興大學 === 土木工程學系 === 87 === In reinforced concrete structures, the corrosion of steel bars has little influences on concrete strength during initial stages. If rustiness continue expanding, then cracks happen and would reduce the age of structures. Therefore, it is quite important to detect and repair structures before disaster happen.
Research works used impact-echo method to detect the corrosion in early days. However, structures would be destroyed seriously when cavities appeared. In the past several years, many Nondestructive tests develop quickly and have better work, such as Potential Measurement, Chloride Ingress Analysis, etc.
In this paper used Potential Measurement Method. We let current pass bond specimen to accelerate corrosion. In the process, we measured the change of potential, recorded the bond strength, measured corrosion rate of steel, to compare with the change of potential after pull-out test. So that we can observe the behavior of corroded steel.
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