Overlay mixture proportions. This project used silica fume at 10% of portland
cement mass as an addition. The use of a high-range water-reducing admixture
and a retarding water-reducing admixture is very common.
The Silica Fume Association
38860 Sierra Lane, Lovettsville, VA 20180
Tel: 540.257.4224 Fax: 540.822.9456