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dc.contributor.authorCastellote, M.-
dc.contributor.authorAndrade, C.-
dc.contributor.authorAlonso, C.-
dc.identifier.citationCement and Concrete Research; Vol. 30; nº 12; págs. 1885-1893; (2000)es_ES
dc.description.abstractIn order to understand the phenomena that take place during a migration test, and to obtain a complete picture of the system through the pursuit of the transference numbers, a phenomenological mass-balance-based model of the evolution of all ionic species, has been developed. The model has been built on a series of steady-state migration tests and has been experimentally validated. Afterwards, it has been applied to migration tests in non-stationary conditions, and the resulting deductions have also been checked with experimental results. This has allowed the development of a new simplified way to determine the non-steady-state diffusion coefficients, Dns, just from the registration of the current intensity circulating and the analysis of the surface concentration, Cs, after the test. In addition, the possibility of the tabulation of the different Cs for different external chloride concentrations and the application of different “binding factors” for each kind of binder is posed, which will allow the calculation of the Dns from a simple migration test of the AASHTO type (ASTM C1202-91).es_ES
dc.subjectChloride diffusion coefficientses_ES
dc.subjectMigration testses_ES
dc.subjectTransference numberses_ES
dc.subjectPhenomenological modeles_ES
dc.titlePhenomenological mass-balance-based model of migration tests in stationary conditions: Application to non-steady-state testses_ES
dc.description.peerreviewedPeer reviewedes_ES
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