Avaliação da reutilização de resíduos de gesso como estratégia para a construção sustentável em Manaus, Brasil

Abstract

Population growth and advances in industry and urbanization contribute to the increase in waste generation, including gypsum. Due to a modification in CONAMA Resolution No. 307, gypsum has been reclassified as Category B, indicating that it can be recycled or reused. This study aimed to diagnose the generation of gypsum waste from construction companies in Manaus and evaluate the technical characteristics of recycled gypsum produced on a pilot scale for reintegration into the civil construction production chain. Laboratory tests were conducted to compare the properties of recycled gypsum with conventional gypsum, assessing setting time, mechanical strength, and consistency. The results indicate that recycled gypsum did not meet the minimum strength required by the standard, suggesting the need for more elaborate processes for its reuse.