Analysis of Chloride Diffusion into Partially Saturated Concrete

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Title: Analysis of Chloride Diffusion into Partially Saturated Concrete

Author(s): Anna V. Saetta, Roberto V. Scotta, and Renato V. Vitaliani

Publication: Materials Journal

Volume: 90

Issue: 5

Appears on pages(s): 441-451

Keywords: chlorides; concretes; durability; diffusivity; hydration; partially saturated concrete; water; Materials Research

Date: 9/1/1993

Abstract:
The governing equations of moisture, heat, and chloride ion flows through concrete within the framework of a distributed parameter model are described. The coupling terms and the nonlinearity of the problem are taken into account and a numerical procedure based on the finite element method is developed to solve the set of equations. The aim of this study is to examine chloride diffusion even in partially saturated concrete by considering the variability of ion diffusion coefficients with concrete parameters. Chloride intrusion in various environmental conditions is investigated and the effect of moisture flux in transporting dissolved ions through the porous media is considered. Comparisons with experimental tests are also carried out to show the reliability and the effectiveness of the proposed numerical model.