Determination of binding isotherms by inverse analysis and prediction of the influence of hydroxyl on chloride penetration

Title: Determination of binding isotherms by inverse analysis and prediction of the influence of hydroxyl on chloride penetration
Author(s): X. Wang, M. Thiéry, V. Baroghel-Bouny
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: 84 - 91
Total Pages: 8
Nb references: 16
Language: English

Abstract: An inverse analysis and an optimization method have been used to fit the effective chloride diffusion coefficient and the chloride binding isotherm parameters from experimental total chloride concentration profiles. The penetration of chloride is simulated by a multi-species transport model for saturated conditions. Two types of binding isotherm are studied: a Freundlich isotherm (written F-isotherm) and an adsorption isotherm related to ion exchange and completed by Friedel’s salt formation (double-layer based isotherm, written DL-isotherm). The relevance of the choice of the binding isotherm is studied and the influence of the initial OH- concentration (pH-value) on the penetration of chloride ions is analyzed.

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