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Question

Why doesn't everyone substitute more?

Answer

Standards, supply of quality SCMs (slag/ash shrink as steel/coal decline) and customer specs. Calcined clay breaks the supply constraint.

From our guide: Clinker substitution (SCMs) — full context, charts and sources there.

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Source: Inzonex Carbon Hub — inzonex.co.uk/carbon · prices dated as shown on each figure · schedule per Regulation (EU) 2023/956 · indicative analytics, not compliance advice.