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Time dependency of chloride diffusion coefficients in concrete



Title: Time dependency of chloride diffusion coefficients in concrete
Author(s): J. Visser
Paper category : conference
Book title: Third International RILEM Workshop on Testing and Modelling Chloride Ingress into Concrete
Editor(s): C. Andrade and J. Kropp
Print-ISBN: 2-912143-48-9
e-ISBN: 2912143578
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 423 - 433
Total Pages: 11
Nb references: 8
Language: English


Abstract: Most of the currently used time-dependent models to predict chloride diffusion in con-crete are based on short term exposure tests. Consequently, there is some serious doubt if these models can be used to model long term exposure tests (field data). An additional factor 1/(1-n) is required to model long term exposure tests accurately. In this paper, the difference and mathematical consequences between short term and long term exposure tests is explained. To obtain optimum values for the three variables (cs, D0 and n) in either solution, the equations should be solved at the same time for chlo-ride profiles determined at different ages. If the variables are determined by the correct approach, the values can be exchanged between the two models.


Online publication: 2002-12-15
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143578.028