Astm c 1240

ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. This requirement is aimed at minimizing the amount of foreign material in the silica fume. Because SiO 2 is the reactive ingredient of silica fume, a limit on the content is deemed appropriate. As noted in Chapter 2, silica fume is an extremely fine material and a sieve analysis will not provide any significant information on particle size or surface area. This abstract is a brief summary of the referenced standard.