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- Substituição de agregados naturais por areias de leito fluidizado na produção de argamassas: uma abordagem para sustentabilidade na construção civilPublication . Khairallah, Larissa; Gonilho Pereira, Cristiana; Jasper, Catarina Marchi; Mello, AmandaThis study evaluates the viability of substituting natural aggregates with fluidized bed sands (FBS) in mortar production, aiming for sustainability in construction. The research evaluates the influence of partial and total substitution of natural fine aggregates with FBS through the characterization of the produced mortars and the aggregates composing them. Considering the scarcity and non-renewability of natural resources used in construction, this research emerges as a response to the need to rethink the use of these materials, seeking to minimize environmental impacts. The research methods involved characterization tests of FBS and the production of mortars with different compositions, including a reference mortar and three variations with partial and total substitution of natural aggregates with FBS. The results indicate that FBS has suitable physical characteristics to replace natural aggregates, although its addition affects the workability and mechanical properties of mortars. The analysis of the results suggests that the substitution of natural aggregates with FBS may lead to a decrease in mechanical strengths and an increase in open porosity and water absorption by capillarity. However, the results also show that the total substitution of natural aggregates with FBS may be viable, depending on the applications of the mortars.It is concluded that the use of FBS in mortar production represents a promising strategy to promote sustainability in construction, but further studies are needed to evaluate other parameters and confirm the conclusions of this initial study.