Characterization of Cements Produced from Clinker Co-Processed with TiO₂ Waste (UOW)

Abstract:

The aim of the present study is to evaluate the properties of cements produced from clinkers co-processed with unreacted ore waste (UOW), that is a waste generated in TiO₂ production. A commercial CP V ARI RS cement and four different cements produced in the laboratory were characterized. The cements produced in the laboratory were made from raw mixes with a Lime Saturation Factor (LSF) fixed in 98% and varying the incorporation content of TiO₂ in 0% (reference); 0.5%; 1.0% and 2.0% from the incorporation of UOW, by weight. The raw mixes were calcined at 1340°C and the resulting clinkers were mixed and interground with gypsum, thus resulting in the laboratory cements. These cements were characterized physically and mineralogically, besides tests of loss on ignition, expansibility (Le Chatelier’s needle) and compressive strength at 1, 3, 7, 28 and 91 days. It was observed that the incorporation of the UOW enhanced the formation of alite, due to the mineralizing effect of the titanium, and cement with 0.5% TiO₂ (1.3% of UOW) presented the highest strength.

• Periodical: Key Engineering Materials (Volume 803)
• Pages: 278-283
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.803.278
• Online since: May 2019
• Authors: José Andrade Neto*, Bruna Bueno Mariani, Nilson Santana Amorim Júnior, Daniel Véras Ribeiro
• Keywords: Industrial Waste, Mineralizer, Portland Cement, Unreacted Ore Waste (UOW)

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