Title:
Silica Fume in PCC: The Effects of Form on Engineering Performance
Author(s):
Menashi D. Cohen and Jan Olek
Publication:
Concrete International
Volume:
11
Issue:
11
Appears on pages(s):
43-47
Keywords:
chlorides; compressive strength, concretes; silica fume; freeze-thaw durability; performance; permeability; portland cements; slurries; Materials Research
DOI:
Date:
11/1/1989
Abstract:
Silica fume is now commercially available in three forms: water slurry, dry-compacted powder, and dry-densified powder. Results of research to clarify uncertainties about the effects of the form of silica fume on 28- and 56-day compressive strengths, resistance to freezing and thawing cycles, and resistance to chloride permeability of high-quality concrete are presented and discussed. The effects of the form of silica fume on the fresh properties (slump and percentage of air content) of concrete are also presented and discussed. Based on the results obtained, the authors see no reason to advocate for or against the use of any specific form of silica fume, as there were no significant differences observed in the engineering properties of concretes containing the three forms of silica fume.