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Calcined clay

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Technology Description

Calcined clay is an alternative cement constituent that can be used instead of clinker in blended cements.

Relevance for Net Zero

Alternative cement constituents will become increasingly important going forward due to the likely decreasing availability of fly ash from coal power plants and granulated blast furnace slag from steel production, which are currently commonly used as alternative cement constituents. Calcined clay has reasonable prospects of providing an alternative, subject to local availability constraints.

Key Countries

Brazil, China, Denmark, Switzerland, Ghana, France, Belgium

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