Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/46313
Title: Alkaline leaching method for the determination of the chloride content in the aqueous phase of hardened cementitious materials
Authors: Castellote, M., Alonso, C., Andrade, C., Castro-Borges, P., Echeverría, M.
Keywords: Soluble chloride
Analysis
Leaching
Pore solution
Issue Date: Feb-2001
Publisher: Elsevier
Abstract: The need of determining “free” chloride content in the aqueous phase of hardened cementitious materials arises from the fact that chloride is the responsible agent of the depassivation of the rebars in reinforced concrete. This paper presents a method of obtaining free chlorides by leaching in an alkaline solution during 24 h. The method is calibrated by comparison with the values obtained by means of the pore-pressing technique (PPT). The agreement found is reasonably good in spite of the risk of excessive leaching that aims to solve part of bound chlorides. The use of decarbonated water as extraction agent has resulted appropriately, perhaps due to the fact that the samples are not powdered, instead, pieces of around 2 mm in size are used.
Publisher version (URL): http://www.sciencedirect.com/science/article/pii/S000888460000449X
URI: http://hdl.handle.net/10261/46313
ISSN: 0008-8846
Citation: Cement and Concrete Research; Vol.31, nº 2, pág. 233-238, (2001)
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