2019-02-212018-07-23DIAS, N. G. Avaliação da deterioração das estruturas de concreto de estações de tratamento de esgoto. 2018. 203 f. Dissertação (Mestrado em Geotecnia, Estruturas e Construção Civil) - Universidade Federal de Goiás, Goiânia, 2018.http://repositorio.bc.ufg.br/tede/handle/tede/9301The environment of Wastewater Treatment Plants (WTP) is classified as one of the most aggressive for concrete. Plants with just a few years of operation may present deterioration in advanced levels, not only caused by the environment aggressivity, but also by the incorrect concrete specification with noncompliance of normative prerogatives and inadequate quality control during construction. The objective of this study is to contribute to the assessment of the degradation level of WTP’s reinforced concrete structures, including the origin and causes of such deterioration. In this context, the methodology applied involved the accomplishment of a literature review, an experimental research and a case study. The experimental research included diagnostic aspects and the concrete’s and sewer’s characterization. The case study was based on the GDE/UnB methodology adapted to WTP which consists in the assessment of the level of deterioration of concrete structures in order to reduce subjectivities. A WTP in the State of Goias with Chemically Assisted Primary treatment was studied. The WTP’ operational aspects showed they may influence in the deterioration of structures as well as the sewer’s characteristics and project specifications. The diagnostic tests measurement of carbonation thickness, silver nitrate spray for chloride evaluation, sclerometry, pacometry, electrical resistivity and sample extraction for evaluation in scanning electron microscope, in the concrete were important to guide the application of the methodology, although the results of electrical resistivity were not conclusive. The WTP presented characteristic manifestations according to the treatment process, such as the erosion of the channel that conduct to the desander, corrosion and disaggregation in the suction well and in the sludge storage tank. In a general way, the WTP presented GDE equal to 94 and therefore was classified with a high level of deterioration, making its maintenance necessary within the period of one year. This maintenance may be performed through the prioritization of units with their respective GDE individuals, considering the first unit to be treated, according to the research, must be the Tank of Transition.application/pdfAcesso AbertoConcretoEstação de tratamento de esgotoManifestação patológicaMétodo de avaliaçãoGrau de deterioraçãoConcreteWastewater treatment plantsPathological manifestationAssessment methodDeterioration levelENGENHARIA CIVIL::CONSTRUCAO CIVILDissertação