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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Corrosion Resistance of Concrete Incorporating Supplementary Cementing Materials in a Marine Environment
Author(s): Andrew Fahim, Edward G. Moffatt and Michael D.A. Thomas
Publication: Special Publication
Appears on pages(s): 18.1-18.14
Keywords: chloride ingress, corrosion, corrosion monitoring, marine environment, servicelife modeling, supplementary cementing materials, durability
Abstract:This paper presents results obtained from steel-reinforced concrete specimens retrieved after 25 to 27 years of exposure in a marine environment. The specimens included mixtures with various SCM blends (25% fly ash, 10% silica fume and 50% slag), as well as a mixture without any SCM, all at a W/CM of 0.50. Testing included chloride-ion depth determination, rapid chloride permeability test, bulk electrical resistivity test and
electrochemical corrosion-monitoring. The chloride profiles revealed that SCM incorporation leads to a significant decrease in chloride-ion penetration, which was supported by rapid
chloride permeability and bulk electrical resistivity tests. Electrochemical corrosionmonitoring showed passivity for all reinforcements at a cover depth of 70 mm or more for
specimens incorporating SCMs, while for specimens not containing SCMs, all reinforcements, up to a cover depth of 140 mm, showed active corrosion. Finally, it was found that the reinforcement corrosion rate in SCM concrete was significantly lower than that for portland cement concrete.
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