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Chapter 2 - Using Silica Fume in Concrete
Improving Durability

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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.