Chloride diffusion coeficient determination for specifications

Title: Chloride diffusion coeficient determination for specifications
Authors: McNally, Ciaran
Richardson, Mark G.
Evans, Conor
Callanan, Thomas
Permanent link: http://hdl.handle.net/10197/2441
Date: 2005
Abstract: The chloride diffusion resistance of reinforced concrete can have a major influence on durability. A move to performance-based specifications is therefore to be encouraged in the case of highway structures, where the client expects a long trouble-free service life. The introduction to practice of service life modelling and performance-based specifications requires a parallel development in user-friendly test methods. This paper reports on experience with three techniques used to determine apparent chloride diffusion coefficients: long-term immersion tests with chloride analysis by Volhard titration, tests of medium duration with chloride analysis by an internal-calibration potentiometric method and short-term Nordtest rapid migration tests. Concrete compositions tested included Portland cement, pfa and ggbs mixes. It was found that medium and long-term tests were consistent, but care is needed with early age tests.
Funding Details: Not applicable
Type of material: Conference Publication
Publisher: Thomas Telford
Copyright (published version): 2005 Thomas Telford Ltd
Keywords: Chloride ingress;Diffusion coefficients;Test methods
Subject LCSH: Chlorides--Diffusion rate
Reinforced cement--Testing
Reinforced cement--Specifications
Language: en
Status of Item: Peer reviewed
Is part of: Dhir, R. K. (ed.). Proceedings of the 6th International Congress on Global Construction
Conference Details: Presented at the 6th International Congress on Global Construction, Dundee, Scotland
Appears in Collections:Critical Infrastructure Group Research Collection
Civil Engineering Research Collection

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