Damage detection of artificial corroded rebars and quantification using non-destructive methods on reinforced concrete structure

Abstract

Corrosion of rebars in reinforced concrete structure is a big universal problem created by saline water ingress causing rebar and other metal structural member to corrode. The deterioration of concrete structures due to the harsh environment conditions leads to the deterioration of the reinforced concrete performance structure, and the premature deterioration of the structure before completing due to carbonation or the chloride content of the future services is expected to be the primary concern for engineers and researchers. Progress of corrosion location cannot be visually evaluated until the point when crack or a delamination is appearing. Therefore, in the study, the Ground Penetrating Radar (GPR) is used to investigate the artificial rebar corrosion damage on steel rebars. The methods showed the artificial rebar corrosion damage can be detected and quantified without damaging the surrounding concrete material. GPR showed the potential on detecting rebar corrosion damage on large areas and in a rapid manner.

Experimental Detection of Embedded Rebar Corrosion in Concrete with Ground Penetrating Radar

“…[4] corroded three steel rebars with accelerated corrosion, then placed them at different depths under known dielectric constant materials to simulate concrete embedment. The rebars were then scanned using a GPR, which showed an increase in TWTT and a decrease in amplitude, agreeing with the ndings from other researchers [13][14][15]5].…”

Numerical modelling of bridge deck reinforcement corrosion based on analysis of GPR data

“…Decreased amplitude; Increased travel time Rebars corroded to differing percentage losses in a sodium chloride solution were embedded in concrete. No concrete surface cracks were visible [37].…”

Vision‐aided three‐dimensional damage quantification and finite element model geometric updating for reinforced concrete structures

“…Various types of damage may occur on the concrete surface during the service life of a structure, such as cracks, spalling, and reinforcement corrosion (Ma et al., 2020, p. 1; Rathod & Gupta, 2019). Without intervention, such damage may expand and eventually cause construction member failure or structural collapse (Senin et al., 2019). Therefore, structural health inspection and evaluation of residual bearing capacity of damaged structures are necessary (Koch et al., 2015; Masciotta et al., 2016).…”