Is there any other options to replace cement with other materials beside POFA?

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Does anyone knows about Palm Oil Fuel Ash (POFA)?

Comparison characterization between ordinary concrete and concrete with POFA .

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Technology developments may it for whatever reasons developed eventually its benefits are multi-Disciplinatary?

Your comments

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Gabriele Bertagnoli

Fly ashes?

Natural Puzzolan

Renny Silalahi

Rice husk ash

Mohd Mustafa Al Bakri Abdullah

Beside POFA, lots of material can replace cement but may be can't replace 100%. Material come from pozzolonic such as fly ash, slag, GGBS. Part of clay also have potential to replace partly of cement like metakoalin. Volcano ash also have big potential on this.