Estudo de revestimentos inorgânicos com inibidor de corrosão aplicado na superfície do concreto
The corrosive phenomenon on reinforced concrete structures is one of the most founded pathologies on the coastal area. With the objective to prevent the process development, or even, retard its beginning, it was studied the application of inorganic covering over concrete surfaces, after its cure,...
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| Formato: | Dissertação |
| Idioma: | por |
| Publicado: |
Universidade Federal do Rio Grande do Norte
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| Acceso en liña: | https://repositorio.ufrn.br/jspui/handle/123456789/12718 |
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| Resumo: | The corrosive phenomenon on reinforced concrete structures is one of the
most founded pathologies on the coastal area. With the objective to prevent the
process development, or even, retard its beginning, it was studied the application of
inorganic covering over concrete surfaces, after its cure, as well as, evaluate the
efficiency of the covering applied on the concrete in reducing its porosity of concrete
preventing the entrance of aggressive agents to preserve the integrity of the existing
armor inside it, comparing the result obtained with the body-of-proof reference, that
didn´t receive covering protection. On the concrete production it was used Portland
Cement CP II 32, coarse aggregate, fine aggregate and water from the local
distributive. Two types of covering were used, one resin based of silicon and solvent
and other white cement based, selected sands and acrylic resin. The concrete
mixture adopted was 1:1,5:2,5 (cement, fine aggregate, coarse aggregate) and 0.50
water/cement ratio. With the concrete on fresh state was made the experiment test
to determinate the workability. On the hardened state was made the concrete
resistance experiment, absorption of water and electrochemical experiments,
through polarization curves. Also was held optical microscopy and Scanning Electron
Microscopy experiments to analyze the layer of the covering applied to the concrete
surface and the interface between the concrete and the layer. The obtained results
shows that the covering applied to the concrete surface didn´t affect the resistance
towards compression. On the absorption of water occurred a diminution of the
percentage absorbed, improving the concrete development by making it more
impermeable towards the entrance of aggressive agents. The electrochemical
experiment results confirmed the water absorption results; the body-of-proof covered
presented larger protection towards the development of corrosives process and
retarded the evolution of the corrosive phenomenon |
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