Preparation of calcium sulfoaluminate-belite cement from marble sludge waste

• The recycling of waste material was successfully carried out leading to the production of less CO2 emission cement known as sulfoaluminate-belite cement.
• The influences of the cement raw mix composition and the different burning temperature were investigated to evaluate the reuse feasibility of marble sludge waste material in cement production.
• Calcium sulfoaluminate–belite cement, environmentally cement, can be produced by raw mix contains in weight percent 25% kaolin, 20% gypsum and 55% marble sludge waste at firing temperature 1200 °C.

Marble sludge waste was used as a major cement raw material in sintering sulfoaluminate cement clinker successfully in the laboratory. The influences of raw mix composition as well as different burning temperatures were investigated. Starting materials and prepared cement were characterized through different techniques including; Fourier transform infrared spectroscopy (FTIR); X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results reveal that calcium sulfoaluminate–belite cement can be produced by burning a raw mixture contains in weight percent (25% kaolin, 20% gypsum and 55% marble sludge waste) at firing temperature ranging between 1200 and 1250 °C.

In this study, the feasibility of recycling marble sludge waste in the production of calcium sulfoaluminate-belite cement was investigated.Figure optionsDownload as PowerPoint slide