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Estimation of chloride contents in hardened OPC pastes



Title: Estimation of chloride contents in hardened OPC pastes
Author(s): M.V.A. Marinescu, H.J.H. Brouwers
Paper category : conference
Book title: 3rd International PhD Workshop on Modelling the Durability of Reinforced Concrete
Editor(s): R. M. Ferreira, J. Gulikers, C. Andrade
Print-ISBN: 978-2-35158-095-0
e-ISBN: 978-2-35158-094-3
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 50 - 57
Total Pages: 8
Nb references: 20
Language: English


Abstract: The focus of this study is chloride binding in hardened cement paste. Ordinary Portland Cement (OPC) has been chosen as binder throughout this study, since it is the simplest system in terms of hydration modeling that contains all phases involved in chloride binding.
This study attempts to relate the total amount of chloride bound in concrete to the amounts bound by different hydration products. The two main chloride binding mechanisms - through physical adsorption and through chemical reactions were taken into account, along with quantifying the amount of chloride in the pore solution.
The most important parameter to be considered when evaluating chloride binding is the concentration of the external chloride solution, which can influence the reactions between the hydration products and chloride ions. Other influencing parameters include, among others, carbonation of the cementitious material, sulphate content of both the binder and the external solution, pH of the pore solution in the hardened paste.


Online publication: 2010-02-22
Publication type : full_text
Public price (Euros): 0.00