2019-04-102019-04-102018-12RIBEIRO, Matheus Eliatan da Silva; MASCARENHA, Márcia Maria dos Anjos; SANTOS, Thiago Lopes dos. Estudo de viabilidade técnica do fosfogesso hemidratado para aplicação em sistema de cobertura de aterros sanitários. Revista Eletrônica de Engenharia Civil, Goiânia, v. 14, n. 2, p. 263-277, jul./dez. 2018. Disponível em: <https://www.revistas.ufg.br/reec/article/view/51458/pdf>.e- 1279-0612http://repositorio.bc.ufg.br/handle/ri/17404The phosphogypsum (CaSO4.nH2O) is a by-product from the industrial production of fertilizers, however this material is considered an environmental passive. This study aims to apply the hemidrate phosphogypsum to final layers of landfill cover, in soil mixtures and bentonite additives. For this analysis, were carried out, in these materials, studies of physical characterization and permeability tests for two compaction energies. Afterwards a simulation of seasonal variations was performed through wetting and drying cycles to verify possible interferences in the hydro mechanical behavior of the materials. An empirical mathematical estimate was made to determine the permeability. In this study, the sample with 6% of bentonite additive in the Reduced Proctor Energy presented a permeability similar to the sample with 0% of bentonite additive compacted in the Standard Proctor Energy and both within the acceptable range for application in cover layers and hydraulic barrier. The soil also presented low permeability in the Standard Proctor, but underwent major hydromechanical changes during the seasonal cycles. The empirical formulation was applicable to lateritic samples regardless of their variation in composition, but when the compaction energy was modified the same equation was not applied and it is necessary to make another mathematical adaptation.porAcesso AbertoAterro sanitárioFosfogessoCondutividade hidráulicaVariações sazonaisFormulação empíricaSanitary landfillPhosphogypsumHydraulic condutivitySeasonal variationsEmpirical formulationArtigo10.5216/reec.v14i2.51458