Efeito da calcina？？o do resíduo de bauxita nas características reológicas e no estado endurecido de suspens？es com cimento Portland

this research work shows the impact of bauxite residue (br) calcination on the rheological and hardened properties of portland cement suspensions. these suspensions were evaluated with water-to-cement ratio of 0.5 and variations of residue content from 5% to 20% in partial substitution of cement. both properties had influence of br content, but had a negligible influence of calcination. therefore, it can be inferred that the utilization of br, in nature or calcinated, in formulations with portland cement, may reduce the consumption of cement, being an alternative to use large amounts of this type of residue.