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Chloride binding in cement II. The influence of the hydroxide concentration in the pore solution of hardened cement paste on chloride binding

✍ Scribed by Josef Tritthart

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 485 KB
Volume: 19
Category: Article
ISSN: 0008-8846
DOI: 10.1016/0008-8846(89)90039-2

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✦ Synopsis

The influence of various factors on the binding of chloride in cement and the chloride concentration of the pore solution was investigated. It was shown that the pore solutions of samples prepared under addition of chloride taken from the same cement and with identical content of total chloride exhibited different chloride concentrations only, if their hydroxide concentrations diverged. The fact that the residual chloride concentration depends on the composition of the pore solution in general, and on the hydroxide concentration in particular, was confirmed by tests with subsequent chloride addition. Chloride-free cement pastes, when stored in chloride solutions of the same concentration, had bound different quantities of chloride, if the hydroxide concentration of the storing solution (pH-value) was different.

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