NDE method for rebar corrosion degree of RC structures

2021 ◽  
pp. 179-192
Author(s):  
H. Oshita
Keyword(s):  
Rc Structures ◽  
Rebar Corrosion

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

2021 ◽  
Vol 11 (15) ◽  
pp. 6772
Author(s):  
Charlotte Van Steen ◽  
Els Verstrynge
Keyword(s):  
Reinforced Concrete ◽  
Degradation Mechanism ◽  
Heterogeneous Material ◽  
Corrosion Damage ◽  
Corrosion Process ◽  
Internal Damage ◽  
Rc Structures ◽  
Degradation Monitoring ◽  
Rebar Corrosion ◽  
Width Measurements

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.

A review on fiber optic sensors for rebar corrosion monitoring in RC structures

2021 ◽  
Vol 313 ◽  
pp. 125578
Author(s):  
Fujian Tang ◽  
Guoshuai Zhou ◽  
Hong-Nan Li ◽  
Els Verstrynge
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Corrosion Monitoring ◽  
Rc Structures ◽  
Rebar Corrosion

Analytical model for time to cover cracking in RC structures due to rebar corrosion

2006 ◽  
Vol 236 (11) ◽  
pp. 1123-1139 ◽  
Author(s):  
Kapilesh Bhargava ◽  
A.K. Ghosh ◽  
Yasuhiro Mori ◽  
S. Ramanujam
Keyword(s):  
Analytical Model ◽  
Rc Structures ◽  
Cover Cracking ◽  
Rebar Corrosion

Model for cover cracking due to rebar corrosion in RC structures

2006 ◽  
Vol 28 (8) ◽  
pp. 1093-1109 ◽  
Author(s):  
Kapilesh Bhargava ◽  
A.K. Ghosh ◽  
Yasuhiro Mori ◽  
S. Ramanujam
Keyword(s):  
Rc Structures ◽  
Cover Cracking ◽  
Rebar Corrosion

State of Development of Seismic Retrofit of RC Structures with Post-Installed Plate-Anchored Shear Reinforcement

2018 ◽  
Vol 56 (7) ◽  
pp. 570-578
Author(s):  
A. Hata ◽  
K. Kawamura ◽  
W. Zhao ◽  
M. Chujo
Keyword(s):  
Seismic Retrofit ◽  
Shear Reinforcement ◽  
Rc Structures
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