Corrosão em Estruturas de Concreto Armado: Monitoração, Causas e Mecanismos
The reinforced concrete, like all engineering material, also undergoes degenerative processes. However, something that has called attention is the high number of structures that were designed to last 50 years presenting pathological manifestations before the expected age. The most common pathology i...
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/40392 |
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| Resumo: | The reinforced concrete, like all engineering material, also undergoes degenerative processes. However, something that has called attention is the high number of structures that were designed to last 50 years presenting pathological manifestations before the expected age. The most common pathology in these processes is the corrosion of concrete steel. It is very important the updated knowledge about this phenomenon, as it entails high costs and several damages to the structure, which can lead to partial or total colapse. This research aims to make a survey, based on bibliographies, of the aggressive conditions to the reinforced concrete, the causes and mechanisms of the corrosive processes to the reinforcements and the consequences of the exposure of the reinforced concrete to aggressive environments. In specific it is expected to develop a research on monitoring the propagation of aggressive agents within the reinforced concrete, based on laboratory testing methodologies, in order to contribute to the reduction of costs caused by corrosive processes. Some specimens were molded and exposed for a period of approximately 1 year to various aggressive conditions. After 12 months they were submitted to the following tests for corrosion monitoring: axial compression strength, surface hardness evaluation, colorimetric tests, apparent electrical resistivity of the concrete and verification of the corrosion rate of the reinforcement by the gravimetric method. Satisfactory results were found, consistent with those explained in the bibliographies. |
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