Investigation of deterioration in corroding reinforced concrete beams using active and passive techniques

Sharma, Ashutosh; Sharma, Shruti; Sharma, Sandeep; Mukherjee, Abhijit

doi:10.1016/j.conbuildmat.2017.11.165

Cited by 36 publications

(17 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…22 Contact transducers that are attached to the ends of the rebars were used by researchers to generate GW in rebar. 23 However, contact transducers are not field-deployable, because the ends of rebars are generally not available in many locations. Embeddable piezoelectric sensors attached to rebar, which are installed during the construction phase, have proven to be durable and effective tools in assessing corrosion.…”

Section: Introductionmentioning

confidence: 99%

Identification of incipient pitting corrosion in reinforced concrete structures using guided waves and piezoelectric wafer transducers

Sriramadasu

Banerjee

2018

Structural Health Monitoring

View full text Add to dashboard Cite

Corrosion poses a great threat to ageing civil infrastructure in the world, and researchers are seeking methods to monitor the corrosion in reinforced concrete structures. Detection of corrosion at its incipient stage has been an impending task in the non-destructive testing of materials. Several non-destructive testing methods to assess the presence of corrosion exist. The limitation of the current methods is that either they require measurement at several points or they require a large network of sensors. Guided wave-based monitoring overcomes these limitations because a large area can be scanned using fewer sensors. The process of corrosion is complex, and it leads to a simultaneous reduction in the diameter and the debonding between concrete and reinforcing steel bars in reinforced concrete structures. However, some of the recent studies that explore the use of guided waves focus only on the detection of the individual effect of diameter reduction and debonding of the rebars in reinforced concrete by artificially inducing the damage. In this study, an accelerated corrosion setup is deployed to induce pitting corrosion in reinforced concrete beams using the impressed current method. These beams are continuously monitored using ultrasonic guided waves that are generated and received by piezoelectric wafer transducers that are attached to the rebars. It is shown that the incipient stage of pitting corrosion can be detected successfully, and the mechanism of corrosion process, which involves the corrosion initiation, progression, and diameter reduction-and-cracking phases, can be established from the signal characteristics of the longitudinal and flexural-guided wave modes. The impressed current flow in the corrosion cell also confirms the various phases of corrosion.

show abstract

Section: Introductionmentioning

confidence: 99%

Identification of incipient pitting corrosion in reinforced concrete structures using guided waves and piezoelectric wafer transducers

Sriramadasu

Banerjee

2018

Structural Health Monitoring

View full text Add to dashboard Cite

show abstract

“…Both parameter-based analysis as signalbased analysis have been discussed. Several researchers reported that the corrosion process can be divided in different stages based on the cumulative amount of AE events [13][14][15][16] and cumulative amount of AE energy [13,17]. These stages can be related to the onset of corrosion and nucleation of corrosion cracks.…”

Section: Introductionmentioning

confidence: 99%

Degradation Monitoring in Reinforced Concrete with 3D Localization of Rebar Corrosion and Related Concrete Cracking

Steen

Verstrynge

2021

Applied Sciences

View full text Add to dashboard Cite

Corrosion of the reinforcement is a major degradation mechanism affecting durability and safety of reinforced concrete (RC) structures. As the corrosion process starts internally, it can take years before visual damage can be noticed on the surface, resulting in an overall degraded condition and leading to large financial costs for maintenance and repair. The acoustic emission (AE) technique enables the continuous monitoring of the progress of internal cracking in a non-invasive way. However, as RC is a heterogeneous material, reliable damage detection and localization remains challenging. This paper presents extensive experimental research aiming at localizing internal damage in RC during the corrosion process. Results of corrosion damage monitoring with AE are presented and validated on three sample scales: small mortar samples (scale 1), RC prisms (scale 2), and RC beams (scale 3). For each scale, the corrosion process was accelerated by imposing a direct current. It is found that the AE technique can detect damage earlier than visual inspection. However, dedicated filtering is necessary to reliably localize AE events. Therefore, AE signals were filtered by a newly developed post-processing protocol which significantly improves the localization results. On the smallest scale, results were confirmed with 3D micro-CT imaging, whereas on scales 2 and 3, results were compared with surface crack width measurements and resulting rebar corrosion levels.

show abstract

“…In the last 10 decades, AE has exhibited extensive capability for assessing damage and deterioration in various types of structure 40–42 . It has shown promising results for detecting consequences of corrosion in steel on the surrounding concrete at early stages along with its progression 43–46 (Ohtsu & Tomoda, 2008; Aldahdooh, Bunnori, & Megat Johari, 2013; Ohtsu, 2015; Prem & Murthy, 2017) 47–50 . Various AE parameters of AE hits, I b value, signal strength, event plot, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Cumulative AE hits and AE event plot are used for studying the crack origin and its propagation to quantify the damage. But, it becomes ineffective for detecting damage in heavily cracked structures 45,46 …”

Section: Introductionmentioning

confidence: 99%

Monitoring the flexural performance of GFRP repaired corroded reinforced concrete beams using passive acoustic emission technique

Garhwal

Sharma

2020

Structural Concrete

Self Cite

View full text Add to dashboard Cite

The focus of the research is to evaluate the flexural behavior and performance of glass fiber reinforced polymer (GFRP) repaired reinforced concrete (RC) beams corroded to different levels using acoustic emission (AE) techniques. A significant improvement in the flexural characteristics of the GFRP repaired corroded beams is observed with a change in failure mode from brittle to ductile. The benefits of GFRP repair in corroded RC beams are further clearly demonstrated by AE monitoring parameters of cumulative AE hits and their amplitudes. A significant improvement in the number of AE hits and the reappearance of AE cracking phases after repair of corroded beams indicate the efficiency of AE technique to monitor repaired structures also. A pictorial representation of the development of microcracks beneath the surface of concrete and GFRP to the formation of macrocracks is well demonstrated in an AE event plot. The assessment of local damage in RC beams using AE techniques subjected to simultaneous loading and corrosion and their further repair would facilitate in‐situ nondestructive evaluation of actual RC structures in future for detecting damage beneath the surface even after FRP repair.

show abstract

Investigation of deterioration in corroding reinforced concrete beams using active and passive techniques

Cited by 36 publications

References 29 publications

Identification of incipient pitting corrosion in reinforced concrete structures using guided waves and piezoelectric wafer transducers

Identification of incipient pitting corrosion in reinforced concrete structures using guided waves and piezoelectric wafer transducers

Degradation Monitoring in Reinforced Concrete with 3D Localization of Rebar Corrosion and Related Concrete Cracking

Monitoring the flexural performance of GFRP repaired corroded reinforced concrete beams using passive acoustic emission technique

Contact Info

Product

Resources

About