In addition to meeting the basic project requirements for the concrete, you
must meet the construction requirements of the contractor who will be
placing and finishing the concrete. Coordinate before bidding the concrete
to ensure that your bid covers all costs, especially the chemical admixtures
that are required for workability.
To maintain about the same "feel" for the concrete, increase the slump by
about two inches (50 mm) over what you would use for a concrete without
silica fume in the same placement.
The Silica Fume Association
38860 Sierra Lane, Lovettsville, VA 20180
Tel: 540.257.4224 Fax: 540.822.9456