Nondestructive evaluation of rebar corrosion in concrete structures using ultrasonics and laser-based sensing

Mayakuntla, Prasanna Kumar; Ghosh, Debdutta; Ganguli, Abhijit

doi:10.1080/10589759.2021.1998489

Cited by 17 publications

(12 citation statements)

References 41 publications

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“…The normal corrosion process may take a long time; in order to expedite the process, the accelerated corrosion technique is implemented. In the present setup, a potential of 30 Volts is generated by a constant DC source following developments in [8,25,26]. A tank is filled with 5% NaCl solution (electrolyte) and the sample is immersed partially up the level of the 16 mm rebar, i.e., the depth of the saline water is 40 mm.…”

Section: Accelerated Corrosion Setupmentioning

confidence: 99%

“…Vertical cross-sectional images of the rebars at different corrosion stages are generated using the SAFT program developed in the MATLAB platform, following the explanations provided in [23][24][25][26]. The waveforms, acquired at various locations as shown in Fig.…”

Section: Imaging Approachmentioning

confidence: 99%

“…The Time of Flight (TOF) of the traveling ultrasonic compressional wave, originating from the source to a subsurface grid point and back to the receiver, is calculated through Eq. 1 as [25,26]:…”

Section: Imaging Approachmentioning

confidence: 99%

“…The authors in [25], investigate changes in the SAFT images of rebars subjected to various levels of accelerated corrosion. A comparative study on contact and non-contact based ultrasonic methods for imaging of rebars subjected to various stages of corrosion is presented in [26]. A gradual disappearance of the rebar signature in the SAFT images has been established as an indicator of progressive corrosion.…”

Section: Introductionmentioning

confidence: 99%

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Gaussian Mixture Model-Based Classification of Corrosion Severity in Concrete Structures Using Ultrasonic Imaging

2023

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Corrosion in reinforced concrete (RC) structures is associated with a reduction of the rebar diameter, loss of interfacial bond, cracking, and eventual spalling and probable collapse of the structure. The negative effects of corrosion on structural safety, durability, and longevity imposes significant costs on the national economy. Therefore, planned non-destructive testing (NDT) of concrete structures is essential to enhance the safety and economic sustainability of infrastructure. Previous work by the research group has established the capability of the ultrasonic Synthetic Aperture Focusing Technique (SAFT) as a tool for detection of rebar corrosion. This work extends the previous research towards application of statistical learning for ascertaining the corrosion severity through analysis of SAFT images of the rebar. Using features extracted from images, a Gaussian mixture model (GMM) is implemented to classify the severity of corrosion damage to the rebar. The results from the research positively demonstrate the potential of the proposed technique as an enabler for decisions pertaining to maintenance and timely repair of concrete infrastructural assets.

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Section: Accelerated Corrosion Setupmentioning

confidence: 99%

Section: Imaging Approachmentioning

confidence: 99%

Section: Imaging Approachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Gaussian Mixture Model-Based Classification of Corrosion Severity in Concrete Structures Using Ultrasonic Imaging

2023

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“…Only methods that use an electromagnetic and mechanical wave can be effectively used for direct reinforcement assessment. The following methods can be distinguished in the mechanical group: high-frequency, active ultrasonic testing methods [ 3 , 4 , 5 ]; low-frequency-active mechanical methods [ 3 , 6 ], and passive-acoustic emission (AE) [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Impact of Magnetization on the Evaluation of Reinforced Concrete Structures Using DC Magnetic Methods

Frankowski

Chady

2022

Materials

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The magnetic method is the most promising method that can be used to inspect large areas of reinforced concrete (RC) structures. Magnetization is a crucial process in this method. The paper aims to present the impact of the magnetization method on the results in the detection of reinforced bars (rebars) and the evaluation of concrete cover thickness in reinforced concrete (RC) structures. Three cases (without magnetization, same pole magnetization, and opposite pole magnetization) were considered in the experiments. Results achieved in all the methods are presented and evaluated. Two different sensing elements were used in the measurements: a magneto-optical (MO) sensor and an AMR sensor. The advantages and disadvantages of both mentioned transducers are presented and discussed in the context of a large areas inspection. The new approach involves using various magnetization methods to improve measurement results for complex structures.

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Characterization of Corrosion-Induced Fracture in Reinforced Concrete Beams Using Electrical Potential, Ultrasound and Low-Frequency Vibration

Ferenc,

Wojtczak,

Meronk

et al. 2024

J Nondestruct Eval

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The paper deals with the non-destructive experimental testing of the reinforced concrete beams under progressive corrosion. A series of experiments using electrical potential, ultrasound and low-frequency vibrations techniques are reported. Electrical potential and natural frequencies were used to characterise and monitor the corrosion process at its initial state. The P-wave velocity measurements were proved to be effective in quantitative assessment of the level of corrosion as it progresses. The possibility of early detection of damage using a proposed damage index and diagnostic framework is promising for possible applications in the non-invasive diagnostics of reinforced concrete elements.

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Nondestructive evaluation of rebar corrosion in concrete structures using ultrasonics and laser-based sensing

Cited by 17 publications

References 41 publications

Gaussian Mixture Model-Based Classification of Corrosion Severity in Concrete Structures Using Ultrasonic Imaging

Gaussian Mixture Model-Based Classification of Corrosion Severity in Concrete Structures Using Ultrasonic Imaging

Impact of Magnetization on the Evaluation of Reinforced Concrete Structures Using DC Magnetic Methods

Characterization of Corrosion-Induced Fracture in Reinforced Concrete Beams Using Electrical Potential, Ultrasound and Low-Frequency Vibration

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