Calcination of art paper sludge waste for the use as a supplementary cementing material

This study shows the effect of calcination clay wastes from an art paper sludge for the use as supplementary cementing materials in blended cements.The starting clay sludge rich in kaolinite and talc was calcined at 600, 650 and 700 °C between 2 and 5 h, kaolinite was transformed into amorphous metakaolinite.This study reveals that calcination at 650 °C for 2 h is recommended to obtain a good supplementary cementing material for manufacture of blended cements.