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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: A Study on the Effect of Some Ions Contained in Seawater on Hydrated Cement Compounds
Author(s): C. P. Ftikos and G. Parissakis
Publication: Special Publication
Appears on pages(s): 1651-1666
Keywords: cement pastes; chlorides; compressive strength; C3A; C-S-H; electron microscopes; hydration; portland cements; sea water; portland pozzolan cements; Santorin earth; sulfate attack; X-ray diffraction; Materials Research
Abstract:The present paper concerns the study on the action of SO42-, Cl-, and Mg2+ ions, which are contained in seawater, and the influence of them on hydrated cement compounds, of pure cements of different C3A content and cement pozzolan pastes, by x-ray diffraction and scanning electron microscopy. Compressive strength development has also been measured. The study shows that these ions affect the compressive strength development after six months, independently of C3A content, in pure cements. It is also shown that the presence of chlorides promotes the formation of chloroaluminates, and more penetration of Mg2+ ions, which leads to the formation of porous C-S-H compounds. Cements with a good interground pozzolan are more resistant to this attack.
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