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Slide
This slide shows data from the work reported by Hooton et al. The cement content for the mixtures tested was 630 lb/yd3 (375 kg/m3) with the silica fume treated as a replacement at the percentages shown. The diffusivity data shown are for bulk diffusion tests at an age of 120 days.

Note that this data is used to develop the plot on the next slide.

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.