Does silica fume carry carbon from the silicon smelter that made it?
Silica fume is collected from the off gas of silicon and ferrosilicon furnaces. Many methods treat it as a residue that carries only its collection, densifying and transport emissions; others allocate part of the smelter's burden. State which rule you used.
Options
- Residue: only bagging, densifying and freight.
- By product: a share of smelter emissions by mass or value.
- Whichever you pick, apply it every year.
Why it matters
Silica fume replaces some cement, so the rule decides how much credit a low carbon concrete mix can claim.
What Senseible does here
Senseible reads bills, fuel invoices and production records into dated, fingerprinted records, so the figure you send a buyer can be traced to its documents.
Sources: GHG Protocol Corporate Value Chain (Scope 3) Standard, GHG Protocol Corporate Standard
Last reviewed 2026-10-22.