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Chloride diffusivity based on migration testing
The present article presents the results of an experimental investigation, where the chloride diffusivities from steady-state migration, non-steady-state migration, and electrical conductivity measurements were compared. A very good correlation between all these diffusivities were obtained, but the non-steady-state migration testing gave a chloride diffusivity that was about 10 times higher than from the steady-state migration and up to several times higher than that from the conductivity method. A good correlation was also observed between the initial electrical conductivity, the conductivity of NaCl saturated concrete, and the charge passed through the concrete. The correlation was further good between the electrical conductivity and the diffusivity obtained from both the steady-state and the non-steady-state migration method. For a given binder system and type of concrete, measurements of initial electrical conductivity appear to provide a good basis both for estimation of chloride diffusivity and for routine control of concrete quality.
Chloride diffusivity based on migration testing
The present article presents the results of an experimental investigation, where the chloride diffusivities from steady-state migration, non-steady-state migration, and electrical conductivity measurements were compared. A very good correlation between all these diffusivities were obtained, but the non-steady-state migration testing gave a chloride diffusivity that was about 10 times higher than from the steady-state migration and up to several times higher than that from the conductivity method. A good correlation was also observed between the initial electrical conductivity, the conductivity of NaCl saturated concrete, and the charge passed through the concrete. The correlation was further good between the electrical conductivity and the diffusivity obtained from both the steady-state and the non-steady-state migration method. For a given binder system and type of concrete, measurements of initial electrical conductivity appear to provide a good basis both for estimation of chloride diffusivity and for routine control of concrete quality.
Chloride diffusivity based on migration testing
Tong, L. (author) / Gjorv, O.E. (author)
Cement and Concrete Research ; 31 ; 973-982
2001
10 Seiten, 17 Quellen
Article (Journal)
English
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