Argyro Drakakaki, Alkiviadis Apostolopoulos and Charis Apostolopoulos
The safety of reinforced concrete structures is generally related to the expected service life of their individual materials. Corrosion damage manifesting on steel reinforcement…
Abstract
Purpose
The safety of reinforced concrete structures is generally related to the expected service life of their individual materials. Corrosion damage manifesting on steel reinforcement is usually underestimated, although it greatly affects both load bearing capacity and plastic deformation limits of steel reinforcement. Corrosion damage degree has a great impact on the life expectancy of structures. This paper aims to discuss these issues.
Design/methodology/approach
In the present study, an effort has been made to examine and present critical parameters, which are significantly responsible for the differentiation of the corrosion damage level, as far as mass loss is concerned. Consequently, the size effect of the exposed – to the aggressive conditions – area of the specimen, as well as the volume of the protected (against corrosion) area, was examined in detail.
Findings
Differential aeration greatly affects the results of corrosion on the material, given that under both high and low oxygen concentration corrosion process is still ongoing.
Originality/value
Findings proceeded are worth mentioning, as they may contribute to a more pertinent evaluation of the corrosion damage (as far as mass loss is concerned), restricting the risk of erroneous predictions concerning the mechanical behavior of steel reinforcement.
Details
Keywords
Alkiviadis Apostolopoulos and Theodore E Matikas
The purpose of this papaer is to study the effects of corrosion on bare and embedded in concrete steel bars and additionaly to study the impact on their mechanical behavior.
Abstract
Purpose
The purpose of this papaer is to study the effects of corrosion on bare and embedded in concrete steel bars and additionaly to study the impact on their mechanical behavior.
Design/methodology/approach
The mechanical properties on bare and embedded specimens of dual phase steel bar B500c were measured after tensile tests, before and after corrosion.
Findings
The results show superficial severe localized pitting corrosion of embedded specimens in contrast to bare specimens. Also recorded a significant influence of corrosion on the mechanical behavior of the embedded steel specimens in contrast to the corresponding bare specimens. The mechanical behavior of dual phase steel bar B500c, due to chloride induced corrosion, seems to be significantly influenced by the existence of local interactions and the intense of external pit depths of different inclusions (MnS and the FeS etc) close to the outer surface.
Originality/value
The originality in this paper is the research on bare and embedded specimens and the comparison between them and additionaly are presented SEM and EDX analysis with interesting findings.