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Effect of alkaline activator composition on the geopolymer properties produced from South African power station fly ash (North-West University (South Africa)., 2022)Eskom produce ~36 million tons of ash annually, of which 90 % is fly ash. Only 7 % of the ash is valorised; much lower than the global average of ~75 %. Geopolymer production from fly ash, as a Portland cement substitute, ...