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Properties of coating mortars with waste from TiO 2 production - UOW

Abstract

In this study, the influence of the addition of waste from TiO2 production, unreacted ore waste (UOW), in the properties of coating mortars was evaluated. The properties of white Portland cement-lime mortars with 0%, 5%, 10% and 15% UOW additions were evaluated in relation to the cement weight. Mortars were evaluated for setting time, rheology (flow table, squeeze flow and rheometry), physical-mechanical properties, adherence to traction and Karsten pipette. The results indicated a delay in the setting time and a loss of plasticity with the incorporation of the UOW. In addition, it was observed that the waste did not significantly influence the physical and mechanical properties of the mortars. The UOW can be incorporated into the coating mortars, presenting properties within the normative requirements. However, for a complete analysis of the feasibility of the use of UOW in mortars, it is necessary to study leaching, solubilization and durability of the mortars.

Keywords:
coating mortars; industrial waste; unreacted ore waste (UOW); rheology

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