Some amount of crystalline quartz is present in silica fume. Typically,
this amount is below measurable limits. The presence of any amount of
quartz requires warnings on bags and material safety data sheets for silica
fume.
Silica fume should be treated as any other respirable dust; breathing large
amounts of the dust should be avoided. Work areas should be well
ventilated and appropriate dust masks should be worn. Manufacturers
materials safety data sheets will provide specific recommendations.
Once the silica fume is incorporated into concrete, there is no potential
for dust generation and no particular safety precautions beyond those
typically required for working with fresh concrete are required.
The Silica Fume Association
38860 Sierra Lane, Lovettsville, VA 20180
Tel: 540.257.4224 Fax: 540.822.9456
