Abstract
An embedded piezoelectric transducer was developed for monitoring the corrosion process of reinforcement bars in concrete based on the piezoelectric impedance technique. The electrochemical method was employed to accelerate the corrosion process of the reinforcement bar with relative mass loss of 0.5–10%, and the resistance spectra of the piezoelectric transducers were investigated to assess the corrosion process. The results show that the corrosion process of the reinforcement bar has significant influence on the resistance spectra of the piezoelectric transducers. Statistical parameters were used to intuitively evaluate the corrosion evolution based on variations of the resistance spectra. The corrosion process of reinforcement bar in concrete can be classified into three periods; that is, the initial period when the relative mass loss is less than 2%, the developing period at a relative mass loss of 2–4%, and the rapid corrosion period when the relative mass loss is higher than 4%.
Highlights
Concrete is presently a widely utilized construction material in the field of civil engineering, and still will be the most important construction material in the future
The corrosion process of reinforcement bar in concrete can be classified into three periods; that is, the initial period when the relative mass loss is less than 2%, the developing period at a relative mass loss of 2–4%, and the rapid corrosion period when the relative mass loss is higher than 4%
The rapidly developing period when the relative mass loss is higher than 4%; obvious fluctuation of corrosion indices is exhibited in this period
Summary
Concrete is presently a widely utilized construction material in the field of civil engineering, and still will be the most important construction material in the future. The concrete structures in service will inevitably be destroyed due to effects of various environmental and natural disasters, leading to significant casualties and economic losses. Corrosion of reinforcement bars is one of the most important factors that causes the invalidation of concrete structures [1,2], especially in some coastal construction projects, such as ports, long-span bridges, and offshore drilling platforms. The structural disasters due to corrosion of reinforcement bars in concrete, such as the decrease of structural bearing capacity, expansion cracking of concrete, and deterioration of bonding ability, appear frequently throughout the world, which has caused extensive concern [3,4,5]. It is reported that serious steel corrosion exists in the coastal concrete engineering that was constructed before 1990s in Chia. It is an important issue to perform online monitoring on these critical concrete structures to ensure their reliable service
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
