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ECN publication
Title:
Bepaling van de effectieve diffusie-coefficient van mobielecomponenten in beton
 
Author(s):
Hoede, D.; Sloot, H.A. van der
 
Published by: Publication date:
ECN 1995
 
ECN report number: Document type:
ECN-C--95-011 ECN publication
 
Number of pages: Full text:
38 Download PDF  

Abstract:
With regard to the problem of facilities to isolate dredge slurry,attention is paid to the diffusion imperviousness of concrete. From the results of data in the literature it can be concluded that there is no univocality regarding the diffusion imperviousness of concrete. The much applied method of Cl measurements can result in values that are a factor 3 to 10 too low. It is possible that interaction of Cl with the cement matrix causes retention, which is not taken into account. By measuring other ions as well (e.g. Na, K, and/or NH3) the measured results, obtained via Cl, will be more reliable. The aim of the study on the title subject is to determine the most reliable and accurate data for the diffusion of mobile components in concrete. Several available methods to determine the effective diffusion coefficient are compared. 10 figs., 1 tab., 1 appendix, 10 refs.


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