Evaluation of the use of TiO2 industry red gypsum waste in cement production

This work analyzes and evaluates the main mechanical, elastic and thermodynamic properties of cements manufactured with different proportions of red gypsum (RG), a waste generated by the titanium dioxide industry. The results show that red gypsum can be used as a safe substitute for natural gypsum in the manufacturing of commercial cements with no reduction in quality. In addition, the mobility of the original pollutants in red gypsum is negligible in the cements made from this waste, with the quantities of leached pollutants similar to those measured in standard reference cements formed with natural gypsum.