Mechanical Properties of 30 Year-Old Naturally Corroded Steel Reinforcing Bars

Fernandez, Ignasi; Berrocal, Carlos Gil

doi:10.1186/s40069-018-0308-x

Cited by 50 publications

(13 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[10][11][12] A third technique using 3D scans has been used to carry out accurate measurements of cross section reduction and pits both for artificially corroded 41 and naturally corroded reinforcement. 42…”

Section: Reinforcement Cross Sectionmentioning

confidence: 99%

Resistance of corroded RC beams: Extending fib Model Code 2010 models

Coronelli

2020

Structural Concrete

View full text Add to dashboard Cite

The residual resistance of corroded reinforced concrete members depends on steel and concrete cross section loss and deterioration of material properties for steel, concrete, and bond. The paper considers these phenomena in models for resistance calculations, starting from the cross section and stress field models in Model Code 2010. The aim of this study is to develop models proposed by Coronelli et al., using a recently proposed approach by Blomfors et al. to model bond of corroded reinforcement based on the Model Code 2010 bond stress-slip relation. Flexure, shear, and anchorage resistance of corroded reinforced concrete beams are studied. The verification is carried out by comparison with tests on corroded beams with different shear span-to-depth ratios. The bond deterioration leads to changes in the inclination of the stress fields in B regions and anchorage failures. The reduced resistance and the changes of the failure modes caused by the deterioration phenomena are captured by the modeling approach.

show abstract

Section: Reinforcement Cross Sectionmentioning

confidence: 99%

Resistance of corroded RC beams: Extending fib Model Code 2010 models

Coronelli

2020

Structural Concrete

View full text Add to dashboard Cite

show abstract

“…Furthermore, corrosion impairs the mechanical response and useful service life of steel reinforcement. The experimental data of existing literature report the consequences of chloride induced corrosion, namely, the percentage mass loss and reduced cross-sectional area, the development of pits and stress concentration points and subsequent drop of mechanical properties of steel reinforcement [2][3][4][5][6][7][8]. Several studies demonstrate the cracking and spalling of concrete cover which leads to reduced bond strength between steel and concrete and reduced service life of structures [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Shot Blasting Process on Mechanical Properties and Anti-Corrosive Behavior of Steel Reinforcement

Basdeki

Apostolopoulos

2022

Metals

View full text Add to dashboard Cite

The need to confront the problem of corrosion resistance of steel reinforcement is an issue of major importance and a perpetual challenge to the structural integrity and reliability in reinforced concrete (RC) structures. The current experimental study presents the results of the combined effect of shot blasting and coating on steel reinforcing bars in respect to their anticorrosive resistance and their mechanical behavior, at various times of exposure to corrosive environment. In the present manuscript, a comparison of different abrasive materials was primarily conducted, via electrochemical measurements (Tafel tests), to estimate the corrosion current (icorr) for each abrasive material. After the indication that corrosion resistance can be modified by shot blasting with corundum, the method of Zn85Al15 coating was chosen to further investigate the combined effect of shot blasting with coating, in terms of percentage mass loss and mechanical behavior of steel reinforcement. The results demonstrated that, upon the completion of the surface treatment process with corundum, the mechanical performance of steel bars was improved in terms of ductility. Moreover, the Zn85Al15 coating provided a satisfactory anticorrosive protection to steel bars in the entire exposure period of accelerated corrosion. The combined contribution of shot blasting and coating processes was deemed to be very encouraging and may trigger further investigation and research, for the production of a better corrosion resistance of B500c steel.

show abstract

“…In order to maintain the long-term performance of a reinforced concrete structure, the detection and monitoring of the defects and degradation have attracted increasing attention. In terms of the durability of a reinforced concrete structure, steel corrosion is the main reason for the structural deterioration [1][2][3]. The corrosion of steel bars in concrete in the natural environment shows non-uniform corrosion, and the cracking pattern of concrete under non-uniform corrosion is very different from that of the uniform corrosion.…”

Section: Introductionmentioning

confidence: 99%

Rust Distribution of Non-Uniform Steel Corrosion Induced by Impressed Current Method

Gao

Yang

et al. 2022

Materials

View full text Add to dashboard Cite

The non-uniform corrosion of steel bars is the main factor affecting the durability of concrete. The cracking pattern of concrete due to corrosion is closely related to the distribution of the corrosion products. Research on the thickness distribution of the rust layer and the cracking pattern of concrete under different influencing factors is of great significance in the prediction of the service life of existing reinforced concrete structures and the avoidance of the premature cracking of the reinforced concrete structures to be built. This paper studies the thickness distribution of the rust layer on the surface of single and multiple corroded reinforcements under non-uniform corrosion. The electrochemical analysis of the electrified corrosion process was carried out by using the finite element analysis software, and the distribution of the current density was obtained. The effects of geometric parameters, steel bar position, and steel bar spacing and shape on the corrosion expansion cracking pattern were studied. The results indicated that as the position of the steel bar differed, the crack pattern of the concrete changed, depending on the number of corrosion peaks (i.e., the maximum thickness of the rust layer). In terms of the corner-located steel, the number of corrosion peaks varied in the cases of different geometrical parameters (i.e., the diameter of the steel bar and the distance between the steel bars and the stainless steel wire). Nevertheless, the critical corrosion degrees of the side-located and corner-located steel bars, with respect to the cracking of the outer concrete surface, were basically the same. Additionally, the ribbed steel bar presented a lower critical corrosion degree than that of the plain steel bar, while little influence was exhibited with the varying angles of the rib.

show abstract

Mechanical Properties of 30 Year-Old Naturally Corroded Steel Reinforcing Bars

Cited by 50 publications

References 27 publications

Resistance of corroded RC beams: Extending fib Model Code 2010 models

Resistance of corroded RC beams: Extending fib Model Code 2010 models

The Effect of Shot Blasting Process on Mechanical Properties and Anti-Corrosive Behavior of Steel Reinforcement

Rust Distribution of Non-Uniform Steel Corrosion Induced by Impressed Current Method

Contact Info

Product

Resources

About