The effect of rebar corrosion on the bond strength of reinforced concrete structures manufactured using cement replacement materials

Elbusaefi, Adel, Lark, Robert John ORCID: https://orcid.org/0000-0002-1796-5321 and Gardner, Diane Ruth ORCID: https://orcid.org/0000-0002-2864-9122 2012. The effect of rebar corrosion on the bond strength of reinforced concrete structures manufactured using cement replacement materials. Presented at: Bond in Concrete 2012: 4th International Symposium, Brescia, Italy, 17-20 June 2012..

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Abstract

This paper describes an experimental study of the influence of corrosion on the bond strength of the steel reinforcement embedded in concretes manufactured with different cementitious binders. The aim is to assess the corrosion resistance of reinforced concrete made using different types of cement replacement materials. To date the materials used have been CEM II and blended cements of ground granulated blast fur nace slag (GGBS) and fly ash (PFA) and, in the future, it is intended will include novel, sustainable cementi tious binders. In this work, 200mm cube pullout test specimens were used, having been immersed in a saline solution (3.5% NaCl) for different exposure times (3, 7, 10 and 14 days) with an applied external current of 0.01A. All samples failed by pullout of the bars. The bond strength between the corroded reinforcing bar and the concrete for the mixes used depended on the corrosion level and the concrete compressive strength. More over, the slip decreased with increasing corrosion independently of the type of concrete used. The reinforcing bars embedded in the concrete made of blended cements exhibited superior corrosion resistance compared to the CEM II concrete.

Item Type:	Conference or Workshop Item - unpublished
Status:	Unpublished
Schools:	Schools > Engineering
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Related URLs:	Organisation
Last Modified:	24 Jul 2026 08:25
URI:	https://orca.cardiff.ac.uk/id/eprint/51996

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