Bond strength evaluation of corroded steel bars via the surface crack width induced by reinforcement corrosion

Correlation of Surface Cracks of Concrete due to Corrosion and Bond Strength (between Steel Bar and Concrete)

“…e results are in a good agreement with results of former studies, such as Lin et al [34], Almusallam et al [36], Rodriguez et al [37], and Fischer and Ožbolt [38].…”

“…Moreover, studies by Andrade et al [32] and Tahershamsi [33] provide information and correlation results of the surface crack width with the corrosion level and the degradation of the bond strength. Lin et al [34] indicate in a recent study the significant effect of cover thickness and amount of transverse reinforcement on induced surface cracking and on bond strength between concrete and corroded rebars. Finally, Zhou et al [35] suggest a parametric model predicting the bond strength loss as a function of surface cracking of the concrete, based on already existing experimental results from the literature.…”

“…Contrary to the above, the occurrence of surface cracking in concrete due to corrosion is visible and measurable, and the crack width is easily quantified. Based on this fact, there is already a tendency of some researchers to link the surface cracks of the concrete, the corrosion damage of steel reinforcement, and the degradation of bonding locally to the surrounding concrete [30][31][32][33][34][35][36][37][38][39][40][41]. Torres-Acosta et al [30,31] investigated the corrosion damage of reinforced beams, assessing pitting geometry and surface crack width, and proposed an empirical relation between rebar radius loss x AVER /r 0 (x AVER is the average corrosion penetration and r 0 the rebar radius) and crack width.…”

Corrosion Effect on Bond Loss between Steel and Concrete

“…Testing RC specimens without stirrups, Maslehuddin et al [27] indicated that although a slight improvement of bond strength is demonstrated in low corrosion levels, sharp degradation pf bond strength is recorded as corrosion increases. Recently, experimental studies by Zandi et al [28], Lin et al [29] and Apostolopoulos and Koulouris [30] investigated both the significant role of stirrups spacing and corrosion carrying out eccentric pull out tests on RC elements with usual design values of concrete cover.…”

Assessing the bond behaviour of corroded smooth and ribbed rebars with acoustic emission monitoring

“…Recently, interest in the relation between the bond strength and the crack width is growing as the latter can easily be measured on-site. An overview is shown in figure 3 [14][15] [16]. As different concrete mixtures and sample sizes were used for each experimental campaign, the normalised bond strength was calculated in order to compare the results.…”