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dc.contributor.authorBatista, A. L.pt_BR
dc.contributor.authorCarvalho, E.pt_BR
dc.contributor.authorTembe I. M.pt_BR
dc.description.abstractCahora Bassa dam is a 170 m high arch dam, of the double curvature type, built in the 1970s on the Zambezi River, in Mozambique. The dam’s concrete is affected by a moderate swelling process, due to alkali-aggregate reactions (AAR) of the alkali-silica (ASR) type, identified in the eighties of the last century, a few years after the construction (1970 to 1975). The owner, the Hidroeléctrica de Cahora Bassa (HCB), in the scope of the general activities of monitoring and safety control, has been increasing the monitoring system and additional testing, to allow a proper characterization of that pathology. The results of laboratorial accelerated expansion tests in samples extracted from the dam´s body, of periodic analysis and the interpretation of the dam´s structural behaviour, based on numerical models of the dam and on the monitoring results, and of regular visual inspections, completed the framework of engineering activities to catch the core knowledge about the swelling phenomenon and its main effects. The paper presents some relevant monitoring results and describes the main procedures related with the safety control activities, in order to allow a comprehensive phenomenon assessment and the correct timely decision making.pt_BR
dc.subjectCahora Bassa dampt_BR
dc.subjectAlkali-silica reaction (ASR)pt_BR
dc.subjectMonitoring datapt_BR
dc.subjectSwelling comprehensive assessmentpt_BR
dc.titleComprehensive assessment of the Cahora Bassa dam's concrete swelling processpt_BR
dc.description.commentsAs atas da conferência tiveram apenas edição digital. O seu acesso é livre no "site" da RILEM, pelo que a comunicação pode constar dos arquivos do LNECpt_BR
dc.identifier.localSão Paulo (Brasil)pt_BR
dc.identifier.conftitle15th ICAAR - International Conference on Alkali Aggregate Reaction in Concretept_BR
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