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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: Sulfate Attack on Concrete in the Oslo Region
Author(s): Johan Moum and I. T. Rosenqvist
Publication: Journal Proceedings
Appears on pages(s): 257-264
Abstract:In the Oslo region of Norway, alum shales containing small amounts of the unstable iron sulfide, pyrrhotite, pro- duce an unusual form of sulfate attack upon concrete placed in or near these deposits, and cause deterioration if they are used as concrete aggregate. The ground water associated with the alum shales carries ferrous sulfate and produces severe sulfate attack and the precipitation of ferric iron compounds in concrete structures made with normal portland cement. Cements of low tricalcium alumi- nate content resist the sulfate attack but may be subject to attack by acid solutions produced when the ferrous sulfate is oxidized. Air-entrained concrete appears to be particularly susceptible.
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