processing calcium oxide from marble stone
Elalfi and gado (2016) used marble sludge waste from a marble processing factory to prepare csab cement via clinkerization. this waste mainly contained only calcite (caco 3), as identified by xray diffraction. to synthesize csab, hemihydrates calcium sulfate and kaolin were the sources of sulfate and al 2 o 3, respectively, to form yeelimite.