Corrosion determination of reinforcement using the electrical resistance method

Brodňan, Miroslav; Koteš, Peter; Vaněrek, Jan; Drochytka, Rostislav

doi:10.17222/mit.2015.217

Cited by 11 publications

(6 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The available methods of reinforcement corrosion diagnostics for structures in use include electrochemical tests [38][39][40][41][42]. One such method is the semi-nondestructive method of measuring polarization resistance with the use of a galvanostatic pulse [43].…”

Section: Diagnostic Methods For Assessing the Degree Of Reinforcementmentioning

confidence: 99%

Electrochemical Diagnostics of Sprayed Fiber-Reinforced Concrete Corrosion

Raczkiewicz

Kossakowski

2019

Applied Sciences

View full text Add to dashboard Cite

Sprayed fiber-reinforced concrete is used in construction for the execution and repair of reinforced concrete elements. It is believed that the addition of steel fibers is most effective, due to their parameters and low costs. Some researchers, however, suggest that the addition of steel fibers can contribute to the initiation of corrosion of the main reinforcement. In consideration of the differences of opinion on the corrosion resistance of sprayed fiber-reinforced concrete, it has become necessary to analyze this issue. The article presents comparative studies of corrosion assessments of the main reinforcement in specimens made of ordinary concrete and concrete with steel fibers. The tests were performed using a semi non-destructive galvanostatic pulse method, which allows location of the areas of corrosion and estimation of the reinforcement corrosion activity. In order to initiate the corrosion processes the specimens were subjected to freezing cycles in NaCl solution. In addition, the shrinkage and compressive strength of specimens were measured, and the observation of specimen structure under a scanning microscope was performed. It was found that galvanostatic pulse method allowed estimation of the reinforcement corrosion progress. The corrosion of the main reinforcement in steel fiber reinforced concrete specimens was less advanced than in the specimens without fibers.

show abstract

Section: Diagnostic Methods For Assessing the Degree Of Reinforcementmentioning

confidence: 99%

Electrochemical Diagnostics of Sprayed Fiber-Reinforced Concrete Corrosion

Raczkiewicz

Kossakowski

2019

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Specifically, the threshold expansion pressure and corrosion rate of concrete reaches the maximum at the moment of cover cracking, which has been widely studied by researchers [1,[6][7][8][9]. In the past thirty years, much effort focused on experimental studies has been directed towards the exploration of cover cracking time induced by the corrosion of reinforcing bars [10][11][12][13][14], along with a variety of corrosion models that were developed and implemented to predict concrete cover cracking time [15][16][17][18][19]. Precisely, among the above models, thick or thin-walled cylinder and elasticity theory are usually utilized for modeling the concrete with embedded steel bars and evaluating the cover cracking time, respectively [6,20,21].…”

Section: Introductionmentioning

confidence: 99%

Modelling of Corrosion-Induced Concrete Cover Cracking Due to Chloride Attacking

et al. 2021

View full text Add to dashboard Cite

The premature failure of reinforced concrete (RC) structures is significantly affected by chloride-induced corrosion of reinforcing steel. Although researchers have achieved many outstanding results in the structural capacity of RC structures in the past few decades, the topic of service life has gradually attracted researchers’ attention. In this work, based on the stress intensity, two models are developed to predict the threshold expansive pressure, corrosion rate and cover cracking time of the corrosion-induced cracking process for RC structures. Specifically, in the proposed models, both the influence of initial defects and modified corrosion current density are taken into account. The results given by these models are in a good agreement with practical experience and laboratory studies, and the influence of each parameter on cover cracking is analyzed. In addition, considering the uncertainty existing in the deterioration process of RC structures, a methodology based on the third-moment method in regard to the stochastic process is proposed, which is able to evaluate the cracking risk of RC structures quantitatively and predict their service life. This method provides a good means to solve relevant problems and can prolong the service life of concrete infrastructures subjected to corrosion by applying timely inspection and repairs.

show abstract

“…More specifically, the current research agrees with the experimental results, which have shown that the bond loss of reinforced concrete due to corrosion is in line with the increase in surface cracking. In this framework, predictive models of bond loss have been introduced by different researchers [21,22,25,[34][35][36][37][38]. Apostolopoulos and Koulouris [21] proposed exponential predictive curves of bond loss in tandem with surface cracking width, by non-linear regression analysis, based on experimental results (Figure 9), by drawing attention to the influence of stirrups spacing.…”

Section: Resultsmentioning

confidence: 99%

An Experimental Study on Effects of Corrosion and Stirrups Spacing on Bond Behavior of Reinforced Concrete

Koulouris

Apostolopoulos

2020

Metals

View full text Add to dashboard Cite

The current experimental study consists of part of an extensive and ongoing research on bond behavior of RC elements damaged by corrosion, focusing on stirrups spacing effect on bonding. For this, RC specimens with different cases of stirrups spacing were casted. Accelerated corrosion was induced in order to simulate the slow process of nature corrosion on RC specimens and the corrosion damage was estimated in terms of mass loss of steel bars and average width of surface concrete cracking. Subsequently, pull-out tests were carried out to examine the bonding resistance between steel and concrete. The study indicates the great influence of density of stirrups on the percentage mass loss of the embedded reinforcing bar, accompanied by width of surface concrete cracking, as well as on bond strength between steel and concrete. The results of bond stress–slip curves show that the densification of stirrups plays a significant role in bonding, leading to higher bond strength values and delaying the degradation of bond loss as corrosion damage increases. However, it becomes apparent that, although the densification of stirrups (Φ8/60 mm) result in the full anchorage of steel-reinforcing bars, it may be inappropriate, since it can lead to a substantial increase in costs and a rapid rise in corrosion rate, due to potential increase. Furthermore, the recorded values of relative slip at bond strength are between 1 and 3 mm, regardless of corrosion damage or concrete cracking, which depends on the ribs geometry and crushing of concrete in front of them. To conclude, the results of the present manuscript indicate that the increase in transverse reinforcement (stirrups) percentage plays a key role in the durability of reinforced concrete elements and in bond strength maintenance between rebar and concrete.

show abstract

Corrosion determination of reinforcement using the electrical resistance method

Cited by 11 publications

References 14 publications

Electrochemical Diagnostics of Sprayed Fiber-Reinforced Concrete Corrosion

Electrochemical Diagnostics of Sprayed Fiber-Reinforced Concrete Corrosion

Modelling of Corrosion-Induced Concrete Cover Cracking Due to Chloride Attacking

An Experimental Study on Effects of Corrosion and Stirrups Spacing on Bond Behavior of Reinforced Concrete

Contact Info

Product

Resources

About