This slide shows the data on the previous slide plotted as a percentage of
the maximum value for both the Rapid Chloride Permeability Test (RCPT) and
the 120-day diffusivity.
Note that reducing the water content does not have nearly as significant an
effect as holding water content constant and adding silica fume as a
replacement at the levels shown. The most significant reduction comes from
reducing water content and adding silica fume. Also note that both tests
show the same relative performance.
Hooton, R. D., Pun, P., Kojundic, T., Fidjesol, P., "Influence of Silica
Fume on Chloride Resistance of Concrete," Proceedings, PCI/FHWA
International Symposium on High-Performance Concrete, New Orleans, October
1997, pp. 245-256.
The Silica Fume Association
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Tel: 540.257.4224 Fax: 540.822.9456