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TECHNICAL PAPER COLLECTOR’S EDITION

matrix, resulting in a more dense and compact 6. Buck, A. D. and Burkes, J. P. Characterization and
microstructure. reactivity of silica fume. Proceedings of the 3rd
International Conference on Cement Microscopy,
Silica fume reduces the thickness of the aggregate Houston, March 1981. pp. 279-285.
cement paste transition zone. It can also reduce 7. Sellevold, E. J., Sager, D. H., Jensen, E. K. and
or even eliminate the degree of orientation of Knudsen, T. Silica fume pastes: Hydration and
the CH crystals in the zone, resulting in less micro structure, Proceedings of Nordisk Miniseminar on
cracking at the transition zone. Consequently, the Silica in Concrete, Trondheim, December 1981.
cement paste-aggregate bond is stronger, leading
to improvements in strength and mechanical 8. Nelson, J. A. and Young, J. F. Additions of colloidal
properties. silicas and silicates to Portland cement pastes,
Cement and Concrete Research. 1977. Vol. 7, pp.
277-282.
The composition, fineness and size distribution
characteristics of silica fume particles must be 9. Cheng-YI, H. and Feldman, R. F. Hydration
reported in greater detail in published reports reactions in Portland cement-silica fume blends,
so that results of different investigations can be Cement and Concrete Research. 1985. Vol. 15, pp.
interpreted and compared with greater accuracies. 585-592,

10. Grutzeck, M. W., Atkinson, S. and Roy, D. M.
References
Mechanism of Hydration of Condensed Silica Fume
1. Malhotra, V. M. and Carette, G. G. Silica in Calcium Hydroxide Solution. Publication of the
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limitations. Concrete International, May 1983. 643-665.
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11. Grutzeck, M. W., Roy, D. M. and Wolfe-Confer,
2. Mehta, P. K. Pozzolanic and Cementitious D. Mechanism of Hydration of Portland Cement
Byproducts as Mineral Admixtures for Concrete—A Composites Containing Ferrosilicon Dust,
Critical Review. Publication of the American Proceedings of the 4th International Conference
Concrete Institute. SP-79. 1983. pp. 1-45. on Cement Microscopy. Ed. G. R. Gouda, Las Vegas,
1982. pp. 193-202.
3. Mehta, P. K. and Gjorv, 0. E. Properties of
Portland cement concrete containing fly ash 12. Kurbus, B., Bakula, F. and Gabrovsek, R. Reactivity
and condensed silica fume. Cement and Concrete of Si0 fume from ferrosilicon production with
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Research. 1982. Vol. 12, pp. 587-595. Ca(OH) under hydrothermal conditions. Cement
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strength mortars containing condensed silica 13. Mehta, P. K. Studies of blended Portland cements
fume. Cement and Concrete Research. 1984. Vol. containing santorin earth, Cement and Concrete
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5. Traetteberg, A. Silica fume as a pozzolanic 14. Regourd, M., Mortureux, B. and Hornain, H.
material. Cemento. 1978. Vol. 75, No. 3, pp. 369- Use of Condensed Silica Fume as Filler in Blended
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