Minimizing Corrosion of Steel Reinforcement--Implementation of Research into Practice

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Title: Minimizing Corrosion of Steel Reinforcement--Implementation of Research into Practice

Author(s): S. Guirguis, H.T. Cao, and D. Baweja

Publication: Special Publication

Volume: 145

Issue:

Appears on pages(s): 263-282

Keywords: binders (materials); concrete durability; corrosion; deterioration; exposure; reinforcing steels; research; standards; Structural Research

Date: 5/1/1994

Abstract:
In Australia, the Cement and Concrete Association has sponsored a number of research projects addressing aspects relating to deterioration of concrete structures caused by corrosion of the reinforcement. The overall objectives of these projects were to identify the factors influencing steel corrosion and to quantify their effect on initiating corrosion and on the rate of corrosion. The ultimate objective was to provide practicing engineers with the relevant parameters that can be used in the design and specification of concrete structures to minimize the risk of corrosion of reinforcing steel. Reviews the major corrosion research carried out in Australia. Article attempts to correlate research findings to the conditions in practice and to quantitatively predict design life of reinforced concrete structures in an environment simulating severe exposure conditions in Australia. The design life predictions presented should be considered within the context of the assumptions and approximations made. Data presented in this paper showed that the influence of binder type is more in the medium-strength concretes in terms of time to potential jump (initiation) and corrosion rate (propagation). Therefore, it is recommended to optimize concrete mixture proportioning with respect to binder type in this range of concrete strengths to utilize the benefits possible from different binders.