Propagation of reinforcement corrosion in concrete and its effects on structural deterioration

Abstract

Studies of the most recently published literature reveal that the current state of research on corrosion propagation in reinforced concrete and its effects on structural deterioration remains unsatisfactory. This is in spite of extensive and intensive research on reinforcement corrosion in concrete for the past three decades or so. This paper presents results produced from an experimental programme designed to investigate the propagation of chloride-induced reinforcement corrosion in concrete and its effects on structural deterioration. Factors that are deemed to contribute to the propagation of reinforcement corrosion and affect structural deterioration are studied. Structural behaviour of corrosion-affected concrete flexural members is examined in terms of strength, stiffness and bond. A deterioration factor is proposed in the paper in order to analyse the test results in a more systematic manner and to make maximum use of the data for uncertainty analysis. Also presented in the paper is a comparison of the test results on strength deterioration as obtained from both a destructive load test and non-destructive measurements, and a relationship between structural deterioration as determined from the two methods is derived.

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

“…e investigation of corrosion effect on bond between steel reinforcement and concrete has been studied by many researchers [14][15][16][17]. Li and Zheng [17] showed that the mechanical degradation of bonding is affected by a number of factors such as rebar geometry, its surface profile, concrete composition, compressive strength of concrete, and cover thickness c. Maslehuddin et al [18] showed that on reinforced concrete specimens without stirrups, even though low corrosion damage of steel temporarily improves bond strength, rapid degradation takes place with the development of corrosive phenomena. Respectively, Auyeung [19] stated that on reinforced concrete specimens without stirrups, the corrosive factor dramatically affects bonding, since only 2% of the cross-sectional loss of the reinforcement bar can lead to up to 80% reduction in bond strength.…”

Corrosion Effect on Bond Loss between Steel and Concrete

“…Corrosion Effect on Bond Loss between Steel and Concrete DOI: http://dx.doi.org /10.5772/intechopen.94166 Besides corrosion phenomenon, the aspects of steel -concrete adhesion depend to a high extent on numerous parameters related to both steel and concrete, namely steel bar geometry, concrete strength and confinement due to transverse reinforcement and concrete cover thickness [23]. The influence of compressive concrete strength on bond behavior of RC specimens has been studied by Abosrra et al [24] and Zandi and Coronelli [25].…”

Experimental Study on the Shear Behavior of RC Beams with Corroded Stirrups

“…The destruction of RC structures caused by steel corrosion is a serious problem (Hostis et al 2011;Li and Zheng 2005). Damage caused by the steel corrosion may be significant in civil R.C.…”